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d958721a | 1 | /** @file |
2 | Memory-only library functions with no library constructor/destructor | |
3 | ||
4 | Copyright (c) 2006 - 2007, Intel Corporation | |
5 | All rights reserved. This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | Module Name: BaseLib.h | |
14 | ||
15 | **/ | |
16 | ||
17 | #ifndef __BASE_LIB__ | |
18 | #define __BASE_LIB__ | |
19 | ||
20 | // | |
21 | // Definitions for architecture specific types | |
22 | // These include SPIN_LOCK and BASE_LIBRARY_JUMP_BUFFER | |
23 | // | |
24 | ||
25 | // | |
26 | // SPIN_LOCK | |
27 | // | |
46dd23b8 | 28 | typedef volatile UINTN SPIN_LOCK; |
d958721a | 29 | |
30 | #if defined (MDE_CPU_IA32) | |
31 | // | |
32 | // IA32 context buffer used by SetJump() and LongJump() | |
33 | // | |
34 | typedef struct { | |
35 | UINT32 Ebx; | |
36 | UINT32 Esi; | |
37 | UINT32 Edi; | |
38 | UINT32 Ebp; | |
39 | UINT32 Esp; | |
40 | UINT32 Eip; | |
41 | } BASE_LIBRARY_JUMP_BUFFER; | |
42 | ||
43 | #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 | |
44 | ||
45 | #elif defined (MDE_CPU_IPF) | |
46 | // | |
47 | // IPF context buffer used by SetJump() and LongJump() | |
48 | // | |
49 | typedef struct { | |
50 | UINT64 F2[2]; | |
51 | UINT64 F3[2]; | |
52 | UINT64 F4[2]; | |
53 | UINT64 F5[2]; | |
54 | UINT64 F16[2]; | |
55 | UINT64 F17[2]; | |
56 | UINT64 F18[2]; | |
57 | UINT64 F19[2]; | |
58 | UINT64 F20[2]; | |
59 | UINT64 F21[2]; | |
60 | UINT64 F22[2]; | |
61 | UINT64 F23[2]; | |
62 | UINT64 F24[2]; | |
63 | UINT64 F25[2]; | |
64 | UINT64 F26[2]; | |
65 | UINT64 F27[2]; | |
66 | UINT64 F28[2]; | |
67 | UINT64 F29[2]; | |
68 | UINT64 F30[2]; | |
69 | UINT64 F31[2]; | |
70 | UINT64 R4; | |
71 | UINT64 R5; | |
72 | UINT64 R6; | |
73 | UINT64 R7; | |
74 | UINT64 SP; | |
75 | UINT64 BR0; | |
76 | UINT64 BR1; | |
77 | UINT64 BR2; | |
78 | UINT64 BR3; | |
79 | UINT64 BR4; | |
80 | UINT64 BR5; | |
81 | UINT64 InitialUNAT; | |
82 | UINT64 AfterSpillUNAT; | |
83 | UINT64 PFS; | |
84 | UINT64 BSP; | |
85 | UINT64 Predicates; | |
86 | UINT64 LoopCount; | |
87 | UINT64 FPSR; | |
88 | } BASE_LIBRARY_JUMP_BUFFER; | |
89 | ||
90 | #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 0x10 | |
91 | ||
92 | #elif defined (MDE_CPU_X64) | |
93 | // | |
94 | // X64 context buffer used by SetJump() and LongJump() | |
95 | // | |
96 | typedef struct { | |
97 | UINT64 Rbx; | |
98 | UINT64 Rsp; | |
99 | UINT64 Rbp; | |
100 | UINT64 Rdi; | |
101 | UINT64 Rsi; | |
102 | UINT64 R12; | |
103 | UINT64 R13; | |
104 | UINT64 R14; | |
105 | UINT64 R15; | |
106 | UINT64 Rip; | |
107 | } BASE_LIBRARY_JUMP_BUFFER; | |
108 | ||
109 | #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 | |
110 | ||
111 | #elif defined (MDE_CPU_EBC) | |
112 | // | |
113 | // EBC context buffer used by SetJump() and LongJump() | |
114 | // | |
115 | typedef struct { | |
116 | UINT64 R0; | |
117 | UINT64 R1; | |
118 | UINT64 R2; | |
119 | UINT64 R3; | |
120 | UINT64 IP; | |
121 | } BASE_LIBRARY_JUMP_BUFFER; | |
122 | ||
123 | #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 | |
124 | ||
125 | #else | |
126 | #error Unknown Processor Type | |
127 | #endif | |
128 | ||
129 | // | |
130 | // String Services | |
131 | // | |
132 | ||
133 | /** | |
134 | Copies one Null-terminated Unicode string to another Null-terminated Unicode | |
135 | string and returns the new Unicode string. | |
136 | ||
137 | This function copies the contents of the Unicode string Source to the Unicode | |
138 | string Destination, and returns Destination. If Source and Destination | |
139 | overlap, then the results are undefined. | |
140 | ||
141 | If Destination is NULL, then ASSERT(). | |
6a352324 | 142 | If Destination is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 143 | If Source is NULL, then ASSERT(). |
6a352324 | 144 | If Source is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 145 | If Source and Destination overlap, then ASSERT(). |
146 | If PcdMaximumUnicodeStringLength is not zero, and Source contains more than | |
147 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
148 | Null-terminator, then ASSERT(). | |
149 | ||
150 | @param Destination Pointer to a Null-terminated Unicode string. | |
151 | @param Source Pointer to a Null-terminated Unicode string. | |
152 | ||
153 | @return Destiantion | |
154 | ||
155 | **/ | |
156 | CHAR16 * | |
157 | EFIAPI | |
158 | StrCpy ( | |
159 | OUT CHAR16 *Destination, | |
160 | IN CONST CHAR16 *Source | |
161 | ); | |
d57e9bdc | 162 | |
163 | ||
d958721a | 164 | /** |
165 | Copies one Null-terminated Unicode string with a maximum length to another | |
166 | Null-terminated Unicode string with a maximum length and returns the new | |
167 | Unicode string. | |
168 | ||
169 | This function copies the contents of the Unicode string Source to the Unicode | |
170 | string Destination, and returns Destination. At most, Length Unicode | |
171 | characters are copied from Source to Destination. If Length is 0, then | |
172 | Destination is returned unmodified. If Length is greater that the number of | |
173 | Unicode characters in Source, then Destination is padded with Null Unicode | |
174 | characters. If Source and Destination overlap, then the results are | |
175 | undefined. | |
176 | ||
6a352324 | 177 | If Length > 0 and Destination is NULL, then ASSERT(). |
178 | If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). | |
179 | If Length > 0 and Source is NULL, then ASSERT(). | |
180 | If Length > 0 and Source is not aligned on a 16-bit bounadry, then ASSERT(). | |
d958721a | 181 | If Source and Destination overlap, then ASSERT(). |
182 | If PcdMaximumUnicodeStringLength is not zero, and Source contains more than | |
183 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
184 | Null-terminator, then ASSERT(). | |
185 | ||
186 | @param Destination Pointer to a Null-terminated Unicode string. | |
187 | @param Source Pointer to a Null-terminated Unicode string. | |
188 | @param Length Maximum number of Unicode characters to copy. | |
189 | ||
190 | @return Destination | |
191 | ||
192 | **/ | |
193 | CHAR16 * | |
194 | EFIAPI | |
195 | StrnCpy ( | |
196 | OUT CHAR16 *Destination, | |
197 | IN CONST CHAR16 *Source, | |
198 | IN UINTN Length | |
199 | ); | |
d57e9bdc | 200 | |
201 | ||
d958721a | 202 | /** |
203 | Returns the length of a Null-terminated Unicode string. | |
204 | ||
205 | This function returns the number of Unicode characters in the Null-terminated | |
206 | Unicode string specified by String. | |
207 | ||
208 | If String is NULL, then ASSERT(). | |
6a352324 | 209 | If String is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 210 | If PcdMaximumUnicodeStringLength is not zero, and String contains more than |
211 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
212 | Null-terminator, then ASSERT(). | |
213 | ||
214 | @param String Pointer to a Null-terminated Unicode string. | |
215 | ||
216 | @return The length of String. | |
217 | ||
218 | **/ | |
219 | UINTN | |
220 | EFIAPI | |
221 | StrLen ( | |
222 | IN CONST CHAR16 *String | |
223 | ); | |
d57e9bdc | 224 | |
225 | ||
d958721a | 226 | /** |
227 | Returns the size of a Null-terminated Unicode string in bytes, including the | |
228 | Null terminator. | |
229 | ||
230 | This function returns the size, in bytes, of the Null-terminated Unicode | |
231 | string specified by String. | |
232 | ||
233 | If String is NULL, then ASSERT(). | |
6a352324 | 234 | If String is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 235 | If PcdMaximumUnicodeStringLength is not zero, and String contains more than |
236 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
237 | Null-terminator, then ASSERT(). | |
238 | ||
239 | @param String Pointer to a Null-terminated Unicode string. | |
240 | ||
241 | @return The size of String. | |
242 | ||
243 | **/ | |
244 | UINTN | |
245 | EFIAPI | |
246 | StrSize ( | |
247 | IN CONST CHAR16 *String | |
248 | ); | |
d57e9bdc | 249 | |
250 | ||
d958721a | 251 | /** |
252 | Compares two Null-terminated Unicode strings, and returns the difference | |
253 | between the first mismatched Unicode characters. | |
254 | ||
255 | This function compares the Null-terminated Unicode string FirstString to the | |
256 | Null-terminated Unicode string SecondString. If FirstString is identical to | |
257 | SecondString, then 0 is returned. Otherwise, the value returned is the first | |
258 | mismatched Unicode character in SecondString subtracted from the first | |
259 | mismatched Unicode character in FirstString. | |
260 | ||
261 | If FirstString is NULL, then ASSERT(). | |
6a352324 | 262 | If FirstString is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 263 | If SecondString is NULL, then ASSERT(). |
6a352324 | 264 | If SecondString is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 265 | If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more |
266 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
267 | Null-terminator, then ASSERT(). | |
268 | If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more | |
269 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
270 | Null-terminator, then ASSERT(). | |
271 | ||
272 | @param FirstString Pointer to a Null-terminated Unicode string. | |
273 | @param SecondString Pointer to a Null-terminated Unicode string. | |
274 | ||
275 | @retval 0 FirstString is identical to SecondString. | |
276 | @retval !=0 FirstString is not identical to SecondString. | |
277 | ||
278 | **/ | |
279 | INTN | |
280 | EFIAPI | |
281 | StrCmp ( | |
282 | IN CONST CHAR16 *FirstString, | |
283 | IN CONST CHAR16 *SecondString | |
284 | ); | |
d57e9bdc | 285 | |
286 | ||
d958721a | 287 | /** |
288 | Compares two Null-terminated Unicode strings with maximum lengths, and | |
289 | returns the difference between the first mismatched Unicode characters. | |
290 | ||
291 | This function compares the Null-terminated Unicode string FirstString to the | |
292 | Null-terminated Unicode string SecondString. At most, Length Unicode | |
293 | characters will be compared. If Length is 0, then 0 is returned. If | |
294 | FirstString is identical to SecondString, then 0 is returned. Otherwise, the | |
295 | value returned is the first mismatched Unicode character in SecondString | |
296 | subtracted from the first mismatched Unicode character in FirstString. | |
297 | ||
6a352324 | 298 | If Length > 0 and FirstString is NULL, then ASSERT(). |
299 | If Length > 0 and FirstString is not aligned on a 16-bit bounadary, then ASSERT(). | |
300 | If Length > 0 and SecondString is NULL, then ASSERT(). | |
301 | If Length > 0 and SecondString is not aligned on a 16-bit bounadary, then ASSERT(). | |
d958721a | 302 | If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more |
303 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
304 | Null-terminator, then ASSERT(). | |
305 | If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more | |
306 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
307 | Null-terminator, then ASSERT(). | |
308 | ||
309 | @param FirstString Pointer to a Null-terminated Unicode string. | |
310 | @param SecondString Pointer to a Null-terminated Unicode string. | |
311 | @param Length Maximum number of Unicode characters to compare. | |
312 | ||
313 | @retval 0 FirstString is identical to SecondString. | |
314 | @retval !=0 FirstString is not identical to SecondString. | |
315 | ||
316 | **/ | |
317 | INTN | |
318 | EFIAPI | |
319 | StrnCmp ( | |
320 | IN CONST CHAR16 *FirstString, | |
321 | IN CONST CHAR16 *SecondString, | |
322 | IN UINTN Length | |
323 | ); | |
d57e9bdc | 324 | |
325 | ||
d958721a | 326 | /** |
327 | Concatenates one Null-terminated Unicode string to another Null-terminated | |
328 | Unicode string, and returns the concatenated Unicode string. | |
329 | ||
330 | This function concatenates two Null-terminated Unicode strings. The contents | |
331 | of Null-terminated Unicode string Source are concatenated to the end of | |
332 | Null-terminated Unicode string Destination. The Null-terminated concatenated | |
333 | Unicode String is returned. If Source and Destination overlap, then the | |
334 | results are undefined. | |
335 | ||
336 | If Destination is NULL, then ASSERT(). | |
6a352324 | 337 | If Destination is not aligned on a 16-bit bounadary, then ASSERT(). |
d958721a | 338 | If Source is NULL, then ASSERT(). |
6a352324 | 339 | If Source is not aligned on a 16-bit bounadary, then ASSERT(). |
d958721a | 340 | If Source and Destination overlap, then ASSERT(). |
341 | If PcdMaximumUnicodeStringLength is not zero, and Destination contains more | |
342 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
343 | Null-terminator, then ASSERT(). | |
344 | If PcdMaximumUnicodeStringLength is not zero, and Source contains more than | |
345 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
346 | Null-terminator, then ASSERT(). | |
347 | If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination | |
348 | and Source results in a Unicode string with more than | |
349 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
350 | Null-terminator, then ASSERT(). | |
351 | ||
352 | @param Destination Pointer to a Null-terminated Unicode string. | |
353 | @param Source Pointer to a Null-terminated Unicode string. | |
354 | ||
355 | @return Destination | |
356 | ||
357 | **/ | |
358 | CHAR16 * | |
359 | EFIAPI | |
360 | StrCat ( | |
361 | IN OUT CHAR16 *Destination, | |
362 | IN CONST CHAR16 *Source | |
363 | ); | |
d57e9bdc | 364 | |
365 | ||
d958721a | 366 | /** |
367 | Concatenates one Null-terminated Unicode string with a maximum length to the | |
368 | end of another Null-terminated Unicode string, and returns the concatenated | |
369 | Unicode string. | |
370 | ||
371 | This function concatenates two Null-terminated Unicode strings. The contents | |
372 | of Null-terminated Unicode string Source are concatenated to the end of | |
373 | Null-terminated Unicode string Destination, and Destination is returned. At | |
374 | most, Length Unicode characters are concatenated from Source to the end of | |
375 | Destination, and Destination is always Null-terminated. If Length is 0, then | |
376 | Destination is returned unmodified. If Source and Destination overlap, then | |
377 | the results are undefined. | |
378 | ||
379 | If Destination is NULL, then ASSERT(). | |
6a352324 | 380 | If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). |
381 | If Length > 0 and Source is NULL, then ASSERT(). | |
382 | If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT(). | |
d958721a | 383 | If Source and Destination overlap, then ASSERT(). |
384 | If PcdMaximumUnicodeStringLength is not zero, and Destination contains more | |
385 | than PcdMaximumUnicodeStringLength Unicode characters not including the | |
386 | Null-terminator, then ASSERT(). | |
387 | If PcdMaximumUnicodeStringLength is not zero, and Source contains more than | |
388 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
389 | Null-terminator, then ASSERT(). | |
390 | If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination | |
391 | and Source results in a Unicode string with more than | |
392 | PcdMaximumUnicodeStringLength Unicode characters not including the | |
393 | Null-terminator, then ASSERT(). | |
394 | ||
395 | @param Destination Pointer to a Null-terminated Unicode string. | |
396 | @param Source Pointer to a Null-terminated Unicode string. | |
397 | @param Length Maximum number of Unicode characters to concatenate from | |
398 | Source. | |
399 | ||
400 | @return Destination | |
401 | ||
402 | **/ | |
403 | CHAR16 * | |
404 | EFIAPI | |
405 | StrnCat ( | |
406 | IN OUT CHAR16 *Destination, | |
407 | IN CONST CHAR16 *Source, | |
408 | IN UINTN Length | |
409 | ); | |
410 | ||
411 | /** | |
cb41bea7 | 412 | Returns the first occurance of a Null-terminated Unicode sub-string |
d958721a | 413 | in a Null-terminated Unicode string. |
414 | ||
cb41bea7 | 415 | This function scans the contents of the Null-terminated Unicode string |
416 | specified by String and returns the first occurrence of SearchString. | |
417 | If SearchString is not found in String, then NULL is returned. If | |
418 | the length of SearchString is zero, then String is | |
d958721a | 419 | returned. |
cb41bea7 | 420 | |
d958721a | 421 | If String is NULL, then ASSERT(). |
422 | If String is not aligned on a 16-bit boundary, then ASSERT(). | |
423 | If SearchString is NULL, then ASSERT(). | |
424 | If SearchString is not aligned on a 16-bit boundary, then ASSERT(). | |
425 | ||
cb41bea7 | 426 | If PcdMaximumUnicodeStringLength is not zero, and SearchString |
427 | or String contains more than PcdMaximumUnicodeStringLength Unicode | |
d958721a | 428 | characters not including the Null-terminator, then ASSERT(). |
429 | ||
430 | @param String Pointer to a Null-terminated Unicode string. | |
431 | @param SearchString Pointer to a Null-terminated Unicode string to search for. | |
432 | ||
433 | @retval NULL If the SearchString does not appear in String. | |
434 | @retval !NULL If there is a match. | |
435 | ||
436 | **/ | |
437 | CHAR16 * | |
438 | EFIAPI | |
439 | StrStr ( | |
440 | IN CONST CHAR16 *String, | |
441 | IN CONST CHAR16 *SearchString | |
442 | ); | |
443 | ||
444 | /** | |
cb41bea7 | 445 | Convert a Null-terminated Unicode decimal string to a value of |
d958721a | 446 | type UINTN. |
447 | ||
cb41bea7 | 448 | This function returns a value of type UINTN by interpreting the contents |
449 | of the Unicode string specified by String as a decimal number. The format | |
d958721a | 450 | of the input Unicode string String is: |
cb41bea7 | 451 | |
d958721a | 452 | [spaces] [decimal digits]. |
cb41bea7 | 453 | |
454 | The valid decimal digit character is in the range [0-9]. The | |
455 | function will ignore the pad space, which includes spaces or | |
456 | tab characters, before [decimal digits]. The running zero in the | |
457 | beginning of [decimal digits] will be ignored. Then, the function | |
458 | stops at the first character that is a not a valid decimal character | |
459 | or a Null-terminator, whichever one comes first. | |
460 | ||
d958721a | 461 | If String is NULL, then ASSERT(). |
cb41bea7 | 462 | If String is not aligned in a 16-bit boundary, then ASSERT(). |
d958721a | 463 | If String has only pad spaces, then 0 is returned. |
cb41bea7 | 464 | If String has no pad spaces or valid decimal digits, |
d958721a | 465 | then 0 is returned. |
cb41bea7 | 466 | If the number represented by String overflows according |
d958721a | 467 | to the range defined by UINTN, then ASSERT(). |
cb41bea7 | 468 | |
469 | If PcdMaximumUnicodeStringLength is not zero, and String contains | |
470 | more than PcdMaximumUnicodeStringLength Unicode characters not including | |
d958721a | 471 | the Null-terminator, then ASSERT(). |
472 | ||
473 | @param String Pointer to a Null-terminated Unicode string. | |
474 | ||
cb41bea7 | 475 | @retval UINTN |
d958721a | 476 | |
477 | **/ | |
478 | UINTN | |
479 | EFIAPI | |
480 | StrDecimalToUintn ( | |
481 | IN CONST CHAR16 *String | |
482 | ); | |
483 | ||
484 | /** | |
cb41bea7 | 485 | Convert a Null-terminated Unicode decimal string to a value of |
d958721a | 486 | type UINT64. |
487 | ||
cb41bea7 | 488 | This function returns a value of type UINT64 by interpreting the contents |
489 | of the Unicode string specified by String as a decimal number. The format | |
d958721a | 490 | of the input Unicode string String is: |
cb41bea7 | 491 | |
d958721a | 492 | [spaces] [decimal digits]. |
cb41bea7 | 493 | |
494 | The valid decimal digit character is in the range [0-9]. The | |
495 | function will ignore the pad space, which includes spaces or | |
496 | tab characters, before [decimal digits]. The running zero in the | |
497 | beginning of [decimal digits] will be ignored. Then, the function | |
498 | stops at the first character that is a not a valid decimal character | |
499 | or a Null-terminator, whichever one comes first. | |
500 | ||
d958721a | 501 | If String is NULL, then ASSERT(). |
cb41bea7 | 502 | If String is not aligned in a 16-bit boundary, then ASSERT(). |
d958721a | 503 | If String has only pad spaces, then 0 is returned. |
cb41bea7 | 504 | If String has no pad spaces or valid decimal digits, |
d958721a | 505 | then 0 is returned. |
cb41bea7 | 506 | If the number represented by String overflows according |
d958721a | 507 | to the range defined by UINT64, then ASSERT(). |
cb41bea7 | 508 | |
509 | If PcdMaximumUnicodeStringLength is not zero, and String contains | |
510 | more than PcdMaximumUnicodeStringLength Unicode characters not including | |
d958721a | 511 | the Null-terminator, then ASSERT(). |
512 | ||
513 | @param String Pointer to a Null-terminated Unicode string. | |
514 | ||
cb41bea7 | 515 | @retval UINT64 |
d958721a | 516 | |
517 | **/ | |
518 | UINT64 | |
519 | EFIAPI | |
520 | StrDecimalToUint64 ( | |
521 | IN CONST CHAR16 *String | |
522 | ); | |
d57e9bdc | 523 | |
d958721a | 524 | |
525 | /** | |
526 | Convert a Null-terminated Unicode hexadecimal string to a value of type UINTN. | |
527 | ||
cb41bea7 | 528 | This function returns a value of type UINTN by interpreting the contents |
529 | of the Unicode string specified by String as a hexadecimal number. | |
d958721a | 530 | The format of the input Unicode string String is: |
cb41bea7 | 531 | |
532 | [spaces][zeros][x][hexadecimal digits]. | |
533 | ||
534 | The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. | |
535 | The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. | |
536 | If "x" appears in the input string, it must be prefixed with at least one 0. | |
537 | The function will ignore the pad space, which includes spaces or tab characters, | |
538 | before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or | |
539 | [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the | |
540 | first valid hexadecimal digit. Then, the function stops at the first character that is | |
d958721a | 541 | a not a valid hexadecimal character or NULL, whichever one comes first. |
542 | ||
543 | If String is NULL, then ASSERT(). | |
544 | If String is not aligned in a 16-bit boundary, then ASSERT(). | |
545 | If String has only pad spaces, then zero is returned. | |
cb41bea7 | 546 | If String has no leading pad spaces, leading zeros or valid hexadecimal digits, |
d958721a | 547 | then zero is returned. |
cb41bea7 | 548 | If the number represented by String overflows according to the range defined by |
d958721a | 549 | UINTN, then ASSERT(). |
550 | ||
cb41bea7 | 551 | If PcdMaximumUnicodeStringLength is not zero, and String contains more than |
552 | PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, | |
d958721a | 553 | then ASSERT(). |
554 | ||
555 | @param String Pointer to a Null-terminated Unicode string. | |
556 | ||
557 | @retval UINTN | |
558 | ||
559 | **/ | |
560 | UINTN | |
561 | EFIAPI | |
562 | StrHexToUintn ( | |
563 | IN CONST CHAR16 *String | |
564 | ); | |
565 | ||
d57e9bdc | 566 | |
d958721a | 567 | /** |
568 | Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64. | |
569 | ||
cb41bea7 | 570 | This function returns a value of type UINT64 by interpreting the contents |
571 | of the Unicode string specified by String as a hexadecimal number. | |
572 | The format of the input Unicode string String is | |
573 | ||
574 | [spaces][zeros][x][hexadecimal digits]. | |
575 | ||
576 | The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. | |
577 | The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. | |
578 | If "x" appears in the input string, it must be prefixed with at least one 0. | |
579 | The function will ignore the pad space, which includes spaces or tab characters, | |
580 | before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or | |
581 | [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the | |
582 | first valid hexadecimal digit. Then, the function stops at the first character that is | |
d958721a | 583 | a not a valid hexadecimal character or NULL, whichever one comes first. |
584 | ||
585 | If String is NULL, then ASSERT(). | |
586 | If String is not aligned in a 16-bit boundary, then ASSERT(). | |
587 | If String has only pad spaces, then zero is returned. | |
cb41bea7 | 588 | If String has no leading pad spaces, leading zeros or valid hexadecimal digits, |
d958721a | 589 | then zero is returned. |
cb41bea7 | 590 | If the number represented by String overflows according to the range defined by |
d958721a | 591 | UINT64, then ASSERT(). |
592 | ||
cb41bea7 | 593 | If PcdMaximumUnicodeStringLength is not zero, and String contains more than |
594 | PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, | |
d958721a | 595 | then ASSERT(). |
596 | ||
597 | @param String Pointer to a Null-terminated Unicode string. | |
598 | ||
599 | @retval UINT64 | |
600 | ||
601 | **/ | |
602 | UINT64 | |
603 | EFIAPI | |
604 | StrHexToUint64 ( | |
605 | IN CONST CHAR16 *String | |
606 | ); | |
607 | ||
d57e9bdc | 608 | |
d958721a | 609 | /** |
cb41bea7 | 610 | Convert one Null-terminated Unicode string to a Null-terminated |
d958721a | 611 | ASCII string and returns the ASCII string. |
d958721a | 612 | |
cb41bea7 | 613 | This function converts the content of the Unicode string Source |
614 | to the ASCII string Destination by copying the lower 8 bits of | |
615 | each Unicode character. It returns Destination. | |
616 | ||
617 | If any Unicode characters in Source contain non-zero value in | |
d958721a | 618 | the upper 8 bits, then ASSERT(). |
cb41bea7 | 619 | |
d958721a | 620 | If Destination is NULL, then ASSERT(). |
621 | If Source is NULL, then ASSERT(). | |
6a352324 | 622 | If Source is not aligned on a 16-bit boundary, then ASSERT(). |
d958721a | 623 | If Source and Destination overlap, then ASSERT(). |
cb41bea7 | 624 | |
625 | If PcdMaximumUnicodeStringLength is not zero, and Source contains | |
626 | more than PcdMaximumUnicodeStringLength Unicode characters not including | |
d958721a | 627 | the Null-terminator, then ASSERT(). |
cb41bea7 | 628 | |
629 | If PcdMaximumAsciiStringLength is not zero, and Source contains more | |
630 | than PcdMaximumAsciiStringLength Unicode characters not including the | |
d958721a | 631 | Null-terminator, then ASSERT(). |
632 | ||
633 | @param Source Pointer to a Null-terminated Unicode string. | |
634 | @param Destination Pointer to a Null-terminated ASCII string. | |
635 | ||
636 | @reture Destination | |
637 | ||
638 | **/ | |
639 | CHAR8 * | |
640 | EFIAPI | |
641 | UnicodeStrToAsciiStr ( | |
642 | IN CONST CHAR16 *Source, | |
643 | OUT CHAR8 *Destination | |
644 | ); | |
645 | ||
d57e9bdc | 646 | |
d958721a | 647 | /** |
648 | Copies one Null-terminated ASCII string to another Null-terminated ASCII | |
649 | string and returns the new ASCII string. | |
650 | ||
651 | This function copies the contents of the ASCII string Source to the ASCII | |
652 | string Destination, and returns Destination. If Source and Destination | |
653 | overlap, then the results are undefined. | |
654 | ||
655 | If Destination is NULL, then ASSERT(). | |
656 | If Source is NULL, then ASSERT(). | |
657 | If Source and Destination overlap, then ASSERT(). | |
658 | If PcdMaximumAsciiStringLength is not zero and Source contains more than | |
659 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
660 | then ASSERT(). | |
661 | ||
662 | @param Destination Pointer to a Null-terminated ASCII string. | |
663 | @param Source Pointer to a Null-terminated ASCII string. | |
664 | ||
665 | @return Destination | |
666 | ||
667 | **/ | |
668 | CHAR8 * | |
669 | EFIAPI | |
670 | AsciiStrCpy ( | |
671 | OUT CHAR8 *Destination, | |
672 | IN CONST CHAR8 *Source | |
673 | ); | |
d57e9bdc | 674 | |
675 | ||
d958721a | 676 | /** |
677 | Copies one Null-terminated ASCII string with a maximum length to another | |
678 | Null-terminated ASCII string with a maximum length and returns the new ASCII | |
679 | string. | |
680 | ||
681 | This function copies the contents of the ASCII string Source to the ASCII | |
682 | string Destination, and returns Destination. At most, Length ASCII characters | |
683 | are copied from Source to Destination. If Length is 0, then Destination is | |
684 | returned unmodified. If Length is greater that the number of ASCII characters | |
685 | in Source, then Destination is padded with Null ASCII characters. If Source | |
686 | and Destination overlap, then the results are undefined. | |
687 | ||
688 | If Destination is NULL, then ASSERT(). | |
689 | If Source is NULL, then ASSERT(). | |
690 | If Source and Destination overlap, then ASSERT(). | |
691 | If PcdMaximumAsciiStringLength is not zero, and Source contains more than | |
692 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
693 | then ASSERT(). | |
694 | ||
695 | @param Destination Pointer to a Null-terminated ASCII string. | |
696 | @param Source Pointer to a Null-terminated ASCII string. | |
697 | @param Length Maximum number of ASCII characters to copy. | |
698 | ||
699 | @return Destination | |
700 | ||
701 | **/ | |
702 | CHAR8 * | |
703 | EFIAPI | |
704 | AsciiStrnCpy ( | |
705 | OUT CHAR8 *Destination, | |
706 | IN CONST CHAR8 *Source, | |
707 | IN UINTN Length | |
708 | ); | |
d57e9bdc | 709 | |
710 | ||
d958721a | 711 | /** |
712 | Returns the length of a Null-terminated ASCII string. | |
713 | ||
714 | This function returns the number of ASCII characters in the Null-terminated | |
715 | ASCII string specified by String. | |
716 | ||
6a352324 | 717 | If Length > 0 and Destination is NULL, then ASSERT(). |
718 | If Length > 0 and Source is NULL, then ASSERT(). | |
d958721a | 719 | If PcdMaximumAsciiStringLength is not zero and String contains more than |
720 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
721 | then ASSERT(). | |
722 | ||
723 | @param String Pointer to a Null-terminated ASCII string. | |
724 | ||
725 | @return The length of String. | |
726 | ||
727 | **/ | |
728 | UINTN | |
729 | EFIAPI | |
730 | AsciiStrLen ( | |
731 | IN CONST CHAR8 *String | |
732 | ); | |
d57e9bdc | 733 | |
734 | ||
d958721a | 735 | /** |
736 | Returns the size of a Null-terminated ASCII string in bytes, including the | |
737 | Null terminator. | |
738 | ||
739 | This function returns the size, in bytes, of the Null-terminated ASCII string | |
740 | specified by String. | |
741 | ||
742 | If String is NULL, then ASSERT(). | |
743 | If PcdMaximumAsciiStringLength is not zero and String contains more than | |
744 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
745 | then ASSERT(). | |
746 | ||
747 | @param String Pointer to a Null-terminated ASCII string. | |
748 | ||
749 | @return The size of String. | |
750 | ||
751 | **/ | |
752 | UINTN | |
753 | EFIAPI | |
754 | AsciiStrSize ( | |
755 | IN CONST CHAR8 *String | |
756 | ); | |
d57e9bdc | 757 | |
758 | ||
d958721a | 759 | /** |
760 | Compares two Null-terminated ASCII strings, and returns the difference | |
761 | between the first mismatched ASCII characters. | |
762 | ||
763 | This function compares the Null-terminated ASCII string FirstString to the | |
764 | Null-terminated ASCII string SecondString. If FirstString is identical to | |
765 | SecondString, then 0 is returned. Otherwise, the value returned is the first | |
766 | mismatched ASCII character in SecondString subtracted from the first | |
767 | mismatched ASCII character in FirstString. | |
768 | ||
769 | If FirstString is NULL, then ASSERT(). | |
770 | If SecondString is NULL, then ASSERT(). | |
771 | If PcdMaximumAsciiStringLength is not zero and FirstString contains more than | |
772 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
773 | then ASSERT(). | |
774 | If PcdMaximumAsciiStringLength is not zero and SecondString contains more | |
775 | than PcdMaximumAsciiStringLength ASCII characters not including the | |
776 | Null-terminator, then ASSERT(). | |
777 | ||
778 | @param FirstString Pointer to a Null-terminated ASCII string. | |
779 | @param SecondString Pointer to a Null-terminated ASCII string. | |
780 | ||
781 | @retval 0 FirstString is identical to SecondString. | |
782 | @retval !=0 FirstString is not identical to SecondString. | |
783 | ||
784 | **/ | |
785 | INTN | |
786 | EFIAPI | |
787 | AsciiStrCmp ( | |
788 | IN CONST CHAR8 *FirstString, | |
789 | IN CONST CHAR8 *SecondString | |
790 | ); | |
d57e9bdc | 791 | |
792 | ||
d958721a | 793 | /** |
794 | Performs a case insensitive comparison of two Null-terminated ASCII strings, | |
795 | and returns the difference between the first mismatched ASCII characters. | |
796 | ||
797 | This function performs a case insensitive comparison of the Null-terminated | |
798 | ASCII string FirstString to the Null-terminated ASCII string SecondString. If | |
799 | FirstString is identical to SecondString, then 0 is returned. Otherwise, the | |
800 | value returned is the first mismatched lower case ASCII character in | |
801 | SecondString subtracted from the first mismatched lower case ASCII character | |
802 | in FirstString. | |
803 | ||
804 | If FirstString is NULL, then ASSERT(). | |
805 | If SecondString is NULL, then ASSERT(). | |
806 | If PcdMaximumAsciiStringLength is not zero and FirstString contains more than | |
807 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
808 | then ASSERT(). | |
809 | If PcdMaximumAsciiStringLength is not zero and SecondString contains more | |
810 | than PcdMaximumAsciiStringLength ASCII characters not including the | |
811 | Null-terminator, then ASSERT(). | |
812 | ||
813 | @param FirstString Pointer to a Null-terminated ASCII string. | |
814 | @param SecondString Pointer to a Null-terminated ASCII string. | |
815 | ||
816 | @retval 0 FirstString is identical to SecondString using case insensitive | |
817 | comparisons. | |
818 | @retval !=0 FirstString is not identical to SecondString using case | |
819 | insensitive comparisons. | |
820 | ||
821 | **/ | |
822 | INTN | |
823 | EFIAPI | |
824 | AsciiStriCmp ( | |
825 | IN CONST CHAR8 *FirstString, | |
826 | IN CONST CHAR8 *SecondString | |
827 | ); | |
d57e9bdc | 828 | |
829 | ||
d958721a | 830 | /** |
831 | Compares two Null-terminated ASCII strings with maximum lengths, and returns | |
832 | the difference between the first mismatched ASCII characters. | |
833 | ||
834 | This function compares the Null-terminated ASCII string FirstString to the | |
835 | Null-terminated ASCII string SecondString. At most, Length ASCII characters | |
836 | will be compared. If Length is 0, then 0 is returned. If FirstString is | |
837 | identical to SecondString, then 0 is returned. Otherwise, the value returned | |
838 | is the first mismatched ASCII character in SecondString subtracted from the | |
839 | first mismatched ASCII character in FirstString. | |
840 | ||
6a352324 | 841 | If Length > 0 and FirstString is NULL, then ASSERT(). |
842 | If Length > 0 and SecondString is NULL, then ASSERT(). | |
d958721a | 843 | If PcdMaximumAsciiStringLength is not zero and FirstString contains more than |
844 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
845 | then ASSERT(). | |
846 | If PcdMaximumAsciiStringLength is not zero and SecondString contains more than | |
847 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
848 | then ASSERT(). | |
849 | ||
850 | @param FirstString Pointer to a Null-terminated ASCII string. | |
851 | @param SecondString Pointer to a Null-terminated ASCII string. | |
852 | ||
853 | @retval 0 FirstString is identical to SecondString. | |
854 | @retval !=0 FirstString is not identical to SecondString. | |
855 | ||
856 | **/ | |
857 | INTN | |
858 | EFIAPI | |
859 | AsciiStrnCmp ( | |
860 | IN CONST CHAR8 *FirstString, | |
861 | IN CONST CHAR8 *SecondString, | |
862 | IN UINTN Length | |
863 | ); | |
d57e9bdc | 864 | |
865 | ||
d958721a | 866 | /** |
867 | Concatenates one Null-terminated ASCII string to another Null-terminated | |
868 | ASCII string, and returns the concatenated ASCII string. | |
869 | ||
870 | This function concatenates two Null-terminated ASCII strings. The contents of | |
871 | Null-terminated ASCII string Source are concatenated to the end of Null- | |
872 | terminated ASCII string Destination. The Null-terminated concatenated ASCII | |
873 | String is returned. | |
874 | ||
875 | If Destination is NULL, then ASSERT(). | |
876 | If Source is NULL, then ASSERT(). | |
877 | If PcdMaximumAsciiStringLength is not zero and Destination contains more than | |
878 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
879 | then ASSERT(). | |
880 | If PcdMaximumAsciiStringLength is not zero and Source contains more than | |
881 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
882 | then ASSERT(). | |
883 | If PcdMaximumAsciiStringLength is not zero and concatenating Destination and | |
884 | Source results in a ASCII string with more than PcdMaximumAsciiStringLength | |
885 | ASCII characters, then ASSERT(). | |
886 | ||
887 | @param Destination Pointer to a Null-terminated ASCII string. | |
888 | @param Source Pointer to a Null-terminated ASCII string. | |
889 | ||
890 | @return Destination | |
891 | ||
892 | **/ | |
893 | CHAR8 * | |
894 | EFIAPI | |
895 | AsciiStrCat ( | |
896 | IN OUT CHAR8 *Destination, | |
897 | IN CONST CHAR8 *Source | |
898 | ); | |
d57e9bdc | 899 | |
900 | ||
d958721a | 901 | /** |
902 | Concatenates one Null-terminated ASCII string with a maximum length to the | |
903 | end of another Null-terminated ASCII string, and returns the concatenated | |
904 | ASCII string. | |
905 | ||
906 | This function concatenates two Null-terminated ASCII strings. The contents | |
907 | of Null-terminated ASCII string Source are concatenated to the end of Null- | |
908 | terminated ASCII string Destination, and Destination is returned. At most, | |
909 | Length ASCII characters are concatenated from Source to the end of | |
910 | Destination, and Destination is always Null-terminated. If Length is 0, then | |
911 | Destination is returned unmodified. If Source and Destination overlap, then | |
912 | the results are undefined. | |
913 | ||
6a352324 | 914 | If Length > 0 and Destination is NULL, then ASSERT(). |
915 | If Length > 0 and Source is NULL, then ASSERT(). | |
d958721a | 916 | If Source and Destination overlap, then ASSERT(). |
917 | If PcdMaximumAsciiStringLength is not zero, and Destination contains more than | |
918 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
919 | then ASSERT(). | |
920 | If PcdMaximumAsciiStringLength is not zero, and Source contains more than | |
921 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
922 | then ASSERT(). | |
923 | If PcdMaximumAsciiStringLength is not zero, and concatenating Destination and | |
924 | Source results in a ASCII string with more than PcdMaximumAsciiStringLength | |
925 | ASCII characters not including the Null-terminator, then ASSERT(). | |
926 | ||
927 | @param Destination Pointer to a Null-terminated ASCII string. | |
928 | @param Source Pointer to a Null-terminated ASCII string. | |
929 | @param Length Maximum number of ASCII characters to concatenate from | |
930 | Source. | |
931 | ||
932 | @return Destination | |
933 | ||
934 | **/ | |
935 | CHAR8 * | |
936 | EFIAPI | |
937 | AsciiStrnCat ( | |
938 | IN OUT CHAR8 *Destination, | |
939 | IN CONST CHAR8 *Source, | |
940 | IN UINTN Length | |
941 | ); | |
942 | ||
d57e9bdc | 943 | |
d958721a | 944 | /** |
cb41bea7 | 945 | Returns the first occurance of a Null-terminated ASCII sub-string |
d958721a | 946 | in a Null-terminated ASCII string. |
947 | ||
cb41bea7 | 948 | This function scans the contents of the ASCII string specified by String |
949 | and returns the first occurrence of SearchString. If SearchString is not | |
950 | found in String, then NULL is returned. If the length of SearchString is zero, | |
d958721a | 951 | then String is returned. |
cb41bea7 | 952 | |
d958721a | 953 | If String is NULL, then ASSERT(). |
954 | If SearchString is NULL, then ASSERT(). | |
955 | ||
cb41bea7 | 956 | If PcdMaximumAsciiStringLength is not zero, and SearchString or |
957 | String contains more than PcdMaximumAsciiStringLength Unicode characters | |
d958721a | 958 | not including the Null-terminator, then ASSERT(). |
959 | ||
960 | @param String Pointer to a Null-terminated ASCII string. | |
961 | @param SearchString Pointer to a Null-terminated ASCII string to search for. | |
962 | ||
963 | @retval NULL If the SearchString does not appear in String. | |
964 | @retval !NULL If there is a match. | |
965 | ||
966 | **/ | |
967 | CHAR8 * | |
968 | EFIAPI | |
969 | AsciiStrStr ( | |
970 | IN CONST CHAR8 *String, | |
971 | IN CONST CHAR8 *SearchString | |
972 | ); | |
973 | ||
d57e9bdc | 974 | |
d958721a | 975 | /** |
cb41bea7 | 976 | Convert a Null-terminated ASCII decimal string to a value of type |
d958721a | 977 | UINTN. |
978 | ||
cb41bea7 | 979 | This function returns a value of type UINTN by interpreting the contents |
980 | of the ASCII string String as a decimal number. The format of the input | |
d958721a | 981 | ASCII string String is: |
cb41bea7 | 982 | |
d958721a | 983 | [spaces] [decimal digits]. |
cb41bea7 | 984 | |
985 | The valid decimal digit character is in the range [0-9]. The function will | |
986 | ignore the pad space, which includes spaces or tab characters, before the digits. | |
987 | The running zero in the beginning of [decimal digits] will be ignored. Then, the | |
988 | function stops at the first character that is a not a valid decimal character or | |
d958721a | 989 | Null-terminator, whichever on comes first. |
cb41bea7 | 990 | |
d958721a | 991 | If String has only pad spaces, then 0 is returned. |
992 | If String has no pad spaces or valid decimal digits, then 0 is returned. | |
cb41bea7 | 993 | If the number represented by String overflows according to the range defined by |
d958721a | 994 | UINTN, then ASSERT(). |
995 | If String is NULL, then ASSERT(). | |
cb41bea7 | 996 | If PcdMaximumAsciiStringLength is not zero, and String contains more than |
997 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
d958721a | 998 | then ASSERT(). |
999 | ||
1000 | @param String Pointer to a Null-terminated ASCII string. | |
1001 | ||
cb41bea7 | 1002 | @retval UINTN |
d958721a | 1003 | |
1004 | **/ | |
1005 | UINTN | |
1006 | EFIAPI | |
1007 | AsciiStrDecimalToUintn ( | |
1008 | IN CONST CHAR8 *String | |
1009 | ); | |
1010 | ||
d57e9bdc | 1011 | |
d958721a | 1012 | /** |
cb41bea7 | 1013 | Convert a Null-terminated ASCII decimal string to a value of type |
d958721a | 1014 | UINT64. |
1015 | ||
cb41bea7 | 1016 | This function returns a value of type UINT64 by interpreting the contents |
1017 | of the ASCII string String as a decimal number. The format of the input | |
d958721a | 1018 | ASCII string String is: |
cb41bea7 | 1019 | |
d958721a | 1020 | [spaces] [decimal digits]. |
cb41bea7 | 1021 | |
1022 | The valid decimal digit character is in the range [0-9]. The function will | |
1023 | ignore the pad space, which includes spaces or tab characters, before the digits. | |
1024 | The running zero in the beginning of [decimal digits] will be ignored. Then, the | |
1025 | function stops at the first character that is a not a valid decimal character or | |
d958721a | 1026 | Null-terminator, whichever on comes first. |
cb41bea7 | 1027 | |
d958721a | 1028 | If String has only pad spaces, then 0 is returned. |
1029 | If String has no pad spaces or valid decimal digits, then 0 is returned. | |
cb41bea7 | 1030 | If the number represented by String overflows according to the range defined by |
d958721a | 1031 | UINT64, then ASSERT(). |
1032 | If String is NULL, then ASSERT(). | |
cb41bea7 | 1033 | If PcdMaximumAsciiStringLength is not zero, and String contains more than |
1034 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
d958721a | 1035 | then ASSERT(). |
1036 | ||
1037 | @param String Pointer to a Null-terminated ASCII string. | |
1038 | ||
cb41bea7 | 1039 | @retval UINT64 |
d958721a | 1040 | |
1041 | **/ | |
1042 | UINT64 | |
1043 | EFIAPI | |
1044 | AsciiStrDecimalToUint64 ( | |
1045 | IN CONST CHAR8 *String | |
1046 | ); | |
1047 | ||
d57e9bdc | 1048 | |
d958721a | 1049 | /** |
1050 | Convert a Null-terminated ASCII hexadecimal string to a value of type UINTN. | |
1051 | ||
cb41bea7 | 1052 | This function returns a value of type UINTN by interpreting the contents of |
1053 | the ASCII string String as a hexadecimal number. The format of the input ASCII | |
d958721a | 1054 | string String is: |
cb41bea7 | 1055 | |
d958721a | 1056 | [spaces][zeros][x][hexadecimal digits]. |
cb41bea7 | 1057 | |
1058 | The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. | |
1059 | The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" | |
1060 | appears in the input string, it must be prefixed with at least one 0. The function | |
1061 | will ignore the pad space, which includes spaces or tab characters, before [zeros], | |
1062 | [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] | |
1063 | will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal | |
1064 | digit. Then, the function stops at the first character that is a not a valid | |
d958721a | 1065 | hexadecimal character or Null-terminator, whichever on comes first. |
cb41bea7 | 1066 | |
d958721a | 1067 | If String has only pad spaces, then 0 is returned. |
1068 | If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then | |
1069 | 0 is returned. | |
1070 | ||
cb41bea7 | 1071 | If the number represented by String overflows according to the range defined by UINTN, |
d958721a | 1072 | then ASSERT(). |
1073 | If String is NULL, then ASSERT(). | |
cb41bea7 | 1074 | If PcdMaximumAsciiStringLength is not zero, |
1075 | and String contains more than PcdMaximumAsciiStringLength ASCII characters not including | |
d958721a | 1076 | the Null-terminator, then ASSERT(). |
1077 | ||
1078 | @param String Pointer to a Null-terminated ASCII string. | |
1079 | ||
1080 | @retval UINTN | |
1081 | ||
1082 | **/ | |
1083 | UINTN | |
1084 | EFIAPI | |
1085 | AsciiStrHexToUintn ( | |
1086 | IN CONST CHAR8 *String | |
1087 | ); | |
1088 | ||
d57e9bdc | 1089 | |
d958721a | 1090 | /** |
1091 | Convert a Null-terminated ASCII hexadecimal string to a value of type UINT64. | |
1092 | ||
cb41bea7 | 1093 | This function returns a value of type UINT64 by interpreting the contents of |
1094 | the ASCII string String as a hexadecimal number. The format of the input ASCII | |
d958721a | 1095 | string String is: |
cb41bea7 | 1096 | |
d958721a | 1097 | [spaces][zeros][x][hexadecimal digits]. |
cb41bea7 | 1098 | |
1099 | The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. | |
1100 | The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" | |
1101 | appears in the input string, it must be prefixed with at least one 0. The function | |
1102 | will ignore the pad space, which includes spaces or tab characters, before [zeros], | |
1103 | [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] | |
1104 | will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal | |
1105 | digit. Then, the function stops at the first character that is a not a valid | |
d958721a | 1106 | hexadecimal character or Null-terminator, whichever on comes first. |
cb41bea7 | 1107 | |
d958721a | 1108 | If String has only pad spaces, then 0 is returned. |
1109 | If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then | |
1110 | 0 is returned. | |
1111 | ||
cb41bea7 | 1112 | If the number represented by String overflows according to the range defined by UINT64, |
d958721a | 1113 | then ASSERT(). |
1114 | If String is NULL, then ASSERT(). | |
cb41bea7 | 1115 | If PcdMaximumAsciiStringLength is not zero, |
1116 | and String contains more than PcdMaximumAsciiStringLength ASCII characters not including | |
d958721a | 1117 | the Null-terminator, then ASSERT(). |
1118 | ||
1119 | @param String Pointer to a Null-terminated ASCII string. | |
1120 | ||
1121 | @retval UINT64 | |
1122 | ||
1123 | **/ | |
1124 | UINT64 | |
1125 | EFIAPI | |
1126 | AsciiStrHexToUint64 ( | |
1127 | IN CONST CHAR8 *String | |
1128 | ); | |
1129 | ||
d57e9bdc | 1130 | |
d958721a | 1131 | /** |
cb41bea7 | 1132 | Convert one Null-terminated ASCII string to a Null-terminated |
d958721a | 1133 | Unicode string and returns the Unicode string. |
1134 | ||
cb41bea7 | 1135 | This function converts the contents of the ASCII string Source to the Unicode |
1136 | string Destination, and returns Destination. The function terminates the | |
1137 | Unicode string Destination by appending a Null-terminator character at the end. | |
1138 | The caller is responsible to make sure Destination points to a buffer with size | |
d958721a | 1139 | equal or greater than ((AsciiStrLen (Source) + 1) * sizeof (CHAR16)) in bytes. |
cb41bea7 | 1140 | |
d958721a | 1141 | If Destination is NULL, then ASSERT(). |
1142 | If Destination is not aligned on a 16-bit boundary, then ASSERT(). | |
1143 | If Source is NULL, then ASSERT(). | |
1144 | If Source and Destination overlap, then ASSERT(). | |
cb41bea7 | 1145 | If PcdMaximumAsciiStringLength is not zero, and Source contains more than |
1146 | PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, | |
d958721a | 1147 | then ASSERT(). |
cb41bea7 | 1148 | If PcdMaximumUnicodeStringLength is not zero, and Source contains more than |
1149 | PcdMaximumUnicodeStringLength ASCII characters not including the | |
d958721a | 1150 | Null-terminator, then ASSERT(). |
1151 | ||
1152 | @param Source Pointer to a Null-terminated ASCII string. | |
1153 | @param Destination Pointer to a Null-terminated Unicode string. | |
1154 | ||
1155 | @reture Destination | |
1156 | ||
1157 | **/ | |
1158 | CHAR16 * | |
1159 | EFIAPI | |
1160 | AsciiStrToUnicodeStr ( | |
1161 | IN CONST CHAR8 *Source, | |
1162 | OUT CHAR16 *Destination | |
1163 | ); | |
1164 | ||
d57e9bdc | 1165 | |
d958721a | 1166 | /** |
1167 | Converts an 8-bit value to an 8-bit BCD value. | |
1168 | ||
1169 | Converts the 8-bit value specified by Value to BCD. The BCD value is | |
1170 | returned. | |
1171 | ||
1172 | If Value >= 100, then ASSERT(). | |
1173 | ||
1174 | @param Value The 8-bit value to convert to BCD. Range 0..99. | |
1175 | ||
1176 | @return The BCD value | |
1177 | ||
1178 | **/ | |
1179 | UINT8 | |
1180 | EFIAPI | |
1181 | DecimalToBcd8 ( | |
1182 | IN UINT8 Value | |
1183 | ); | |
1184 | ||
d57e9bdc | 1185 | |
d958721a | 1186 | /** |
1187 | Converts an 8-bit BCD value to an 8-bit value. | |
1188 | ||
1189 | Converts the 8-bit BCD value specified by Value to an 8-bit value. The 8-bit | |
1190 | value is returned. | |
1191 | ||
1192 | If Value >= 0xA0, then ASSERT(). | |
1193 | If (Value & 0x0F) >= 0x0A, then ASSERT(). | |
1194 | ||
1195 | @param Value The 8-bit BCD value to convert to an 8-bit value. | |
1196 | ||
1197 | @return The 8-bit value is returned. | |
1198 | ||
1199 | **/ | |
1200 | UINT8 | |
1201 | EFIAPI | |
1202 | BcdToDecimal8 ( | |
1203 | IN UINT8 Value | |
1204 | ); | |
1205 | ||
1206 | ||
1207 | // | |
1208 | // Linked List Functions and Macros | |
1209 | // | |
1210 | ||
1211 | /** | |
1212 | Initializes the head node of a doubly linked list that is declared as a | |
1213 | global variable in a module. | |
1214 | ||
1215 | Initializes the forward and backward links of a new linked list. After | |
1216 | initializing a linked list with this macro, the other linked list functions | |
1217 | may be used to add and remove nodes from the linked list. This macro results | |
1218 | in smaller executables by initializing the linked list in the data section, | |
1219 | instead if calling the InitializeListHead() function to perform the | |
1220 | equivalent operation. | |
1221 | ||
1222 | @param ListHead The head note of a list to initiailize. | |
1223 | ||
1224 | **/ | |
1225 | #define INITIALIZE_LIST_HEAD_VARIABLE(ListHead) {&ListHead, &ListHead} | |
1226 | ||
d57e9bdc | 1227 | |
d958721a | 1228 | /** |
1229 | Initializes the head node of a doubly linked list, and returns the pointer to | |
1230 | the head node of the doubly linked list. | |
1231 | ||
1232 | Initializes the forward and backward links of a new linked list. After | |
1233 | initializing a linked list with this function, the other linked list | |
1234 | functions may be used to add and remove nodes from the linked list. It is up | |
1235 | to the caller of this function to allocate the memory for ListHead. | |
1236 | ||
1237 | If ListHead is NULL, then ASSERT(). | |
1238 | ||
1239 | @param ListHead A pointer to the head node of a new doubly linked list. | |
1240 | ||
1241 | @return ListHead | |
1242 | ||
1243 | **/ | |
1244 | LIST_ENTRY * | |
1245 | EFIAPI | |
1246 | InitializeListHead ( | |
1247 | IN LIST_ENTRY *ListHead | |
1248 | ); | |
1249 | ||
d57e9bdc | 1250 | |
d958721a | 1251 | /** |
1252 | Adds a node to the beginning of a doubly linked list, and returns the pointer | |
1253 | to the head node of the doubly linked list. | |
1254 | ||
1255 | Adds the node Entry at the beginning of the doubly linked list denoted by | |
1256 | ListHead, and returns ListHead. | |
1257 | ||
1258 | If ListHead is NULL, then ASSERT(). | |
1259 | If Entry is NULL, then ASSERT(). | |
1260 | If ListHead was not initialized with InitializeListHead(), then ASSERT(). | |
1261 | If PcdMaximumLinkedListLenth is not zero, and prior to insertion the number | |
1262 | of nodes in ListHead, including the ListHead node, is greater than or | |
1263 | equal to PcdMaximumLinkedListLength, then ASSERT(). | |
1264 | ||
1265 | @param ListHead A pointer to the head node of a doubly linked list. | |
1266 | @param Entry A pointer to a node that is to be inserted at the beginning | |
1267 | of a doubly linked list. | |
1268 | ||
1269 | @return ListHead | |
1270 | ||
1271 | **/ | |
1272 | LIST_ENTRY * | |
1273 | EFIAPI | |
1274 | InsertHeadList ( | |
1275 | IN LIST_ENTRY *ListHead, | |
1276 | IN LIST_ENTRY *Entry | |
1277 | ); | |
1278 | ||
d57e9bdc | 1279 | |
d958721a | 1280 | /** |
1281 | Adds a node to the end of a doubly linked list, and returns the pointer to | |
1282 | the head node of the doubly linked list. | |
1283 | ||
1284 | Adds the node Entry to the end of the doubly linked list denoted by ListHead, | |
1285 | and returns ListHead. | |
1286 | ||
1287 | If ListHead is NULL, then ASSERT(). | |
1288 | If Entry is NULL, then ASSERT(). | |
1289 | If ListHead was not initialized with InitializeListHead(), then ASSERT(). | |
1290 | If PcdMaximumLinkedListLenth is not zero, and prior to insertion the number | |
1291 | of nodes in ListHead, including the ListHead node, is greater than or | |
1292 | equal to PcdMaximumLinkedListLength, then ASSERT(). | |
1293 | ||
1294 | @param ListHead A pointer to the head node of a doubly linked list. | |
1295 | @param Entry A pointer to a node that is to be added at the end of the | |
1296 | doubly linked list. | |
1297 | ||
1298 | @return ListHead | |
1299 | ||
1300 | **/ | |
1301 | LIST_ENTRY * | |
1302 | EFIAPI | |
1303 | InsertTailList ( | |
1304 | IN LIST_ENTRY *ListHead, | |
1305 | IN LIST_ENTRY *Entry | |
1306 | ); | |
1307 | ||
d57e9bdc | 1308 | |
d958721a | 1309 | /** |
1310 | Retrieves the first node of a doubly linked list. | |
1311 | ||
1312 | Returns the first node of a doubly linked list. List must have been | |
1313 | initialized with InitializeListHead(). If List is empty, then NULL is | |
1314 | returned. | |
1315 | ||
1316 | If List is NULL, then ASSERT(). | |
1317 | If List was not initialized with InitializeListHead(), then ASSERT(). | |
1318 | If PcdMaximumLinkedListLenth is not zero, and the number of nodes | |
1319 | in List, including the List node, is greater than or equal to | |
1320 | PcdMaximumLinkedListLength, then ASSERT(). | |
1321 | ||
1322 | @param List A pointer to the head node of a doubly linked list. | |
1323 | ||
1324 | @return The first node of a doubly linked list. | |
1325 | @retval NULL The list is empty. | |
1326 | ||
1327 | **/ | |
1328 | LIST_ENTRY * | |
1329 | EFIAPI | |
1330 | GetFirstNode ( | |
1331 | IN CONST LIST_ENTRY *List | |
1332 | ); | |
1333 | ||
d57e9bdc | 1334 | |
d958721a | 1335 | /** |
1336 | Retrieves the next node of a doubly linked list. | |
1337 | ||
1338 | Returns the node of a doubly linked list that follows Node. List must have | |
1339 | been initialized with InitializeListHead(). If List is empty, then List is | |
1340 | returned. | |
1341 | ||
1342 | If List is NULL, then ASSERT(). | |
1343 | If Node is NULL, then ASSERT(). | |
1344 | If List was not initialized with InitializeListHead(), then ASSERT(). | |
1345 | If PcdMaximumLinkedListLenth is not zero, and List contains more than | |
1346 | PcdMaximumLinkedListLenth nodes, then ASSERT(). | |
1347 | If Node is not a node in List, then ASSERT(). | |
1348 | ||
1349 | @param List A pointer to the head node of a doubly linked list. | |
1350 | @param Node A pointer to a node in the doubly linked list. | |
1351 | ||
1352 | @return Pointer to the next node if one exists. Otherwise a null value which | |
1353 | is actually List is returned. | |
1354 | ||
1355 | **/ | |
1356 | LIST_ENTRY * | |
1357 | EFIAPI | |
1358 | GetNextNode ( | |
1359 | IN CONST LIST_ENTRY *List, | |
1360 | IN CONST LIST_ENTRY *Node | |
1361 | ); | |
1362 | ||
d57e9bdc | 1363 | |
d958721a | 1364 | /** |
1365 | Checks to see if a doubly linked list is empty or not. | |
1366 | ||
1367 | Checks to see if the doubly linked list is empty. If the linked list contains | |
1368 | zero nodes, this function returns TRUE. Otherwise, it returns FALSE. | |
1369 | ||
1370 | If ListHead is NULL, then ASSERT(). | |
1371 | If ListHead was not initialized with InitializeListHead(), then ASSERT(). | |
1372 | If PcdMaximumLinkedListLenth is not zero, and the number of nodes | |
1373 | in List, including the List node, is greater than or equal to | |
1374 | PcdMaximumLinkedListLength, then ASSERT(). | |
1375 | ||
1376 | @param ListHead A pointer to the head node of a doubly linked list. | |
1377 | ||
1378 | @retval TRUE The linked list is empty. | |
1379 | @retval FALSE The linked list is not empty. | |
1380 | ||
1381 | **/ | |
1382 | BOOLEAN | |
1383 | EFIAPI | |
1384 | IsListEmpty ( | |
1385 | IN CONST LIST_ENTRY *ListHead | |
1386 | ); | |
1387 | ||
d57e9bdc | 1388 | |
d958721a | 1389 | /** |
1390 | Determines if a node in a doubly linked list is null. | |
1391 | ||
1392 | Returns FALSE if Node is one of the nodes in the doubly linked list specified | |
1393 | by List. Otherwise, TRUE is returned. List must have been initialized with | |
1394 | InitializeListHead(). | |
1395 | ||
1396 | If List is NULL, then ASSERT(). | |
1397 | If Node is NULL, then ASSERT(). | |
1398 | If List was not initialized with InitializeListHead(), then ASSERT(). | |
1399 | If PcdMaximumLinkedListLenth is not zero, and the number of nodes | |
1400 | in List, including the List node, is greater than or equal to | |
1401 | PcdMaximumLinkedListLength, then ASSERT(). | |
1402 | If Node is not a node in List and Node is not equal to List, then ASSERT(). | |
1403 | ||
1404 | @param List A pointer to the head node of a doubly linked list. | |
1405 | @param Node A pointer to a node in the doubly linked list. | |
1406 | ||
1407 | @retval TRUE Node is one of the nodes in the doubly linked list. | |
1408 | @retval FALSE Node is not one of the nodes in the doubly linked list. | |
1409 | ||
1410 | **/ | |
1411 | BOOLEAN | |
1412 | EFIAPI | |
1413 | IsNull ( | |
1414 | IN CONST LIST_ENTRY *List, | |
1415 | IN CONST LIST_ENTRY *Node | |
1416 | ); | |
1417 | ||
d57e9bdc | 1418 | |
d958721a | 1419 | /** |
1420 | Determines if a node the last node in a doubly linked list. | |
1421 | ||
1422 | Returns TRUE if Node is the last node in the doubly linked list specified by | |
1423 | List. Otherwise, FALSE is returned. List must have been initialized with | |
1424 | InitializeListHead(). | |
1425 | ||
1426 | If List is NULL, then ASSERT(). | |
1427 | If Node is NULL, then ASSERT(). | |
1428 | If List was not initialized with InitializeListHead(), then ASSERT(). | |
1429 | If PcdMaximumLinkedListLenth is not zero, and the number of nodes | |
1430 | in List, including the List node, is greater than or equal to | |
1431 | PcdMaximumLinkedListLength, then ASSERT(). | |
1432 | If Node is not a node in List, then ASSERT(). | |
1433 | ||
1434 | @param List A pointer to the head node of a doubly linked list. | |
1435 | @param Node A pointer to a node in the doubly linked list. | |
1436 | ||
1437 | @retval TRUE Node is the last node in the linked list. | |
1438 | @retval FALSE Node is not the last node in the linked list. | |
1439 | ||
1440 | **/ | |
1441 | BOOLEAN | |
1442 | EFIAPI | |
1443 | IsNodeAtEnd ( | |
1444 | IN CONST LIST_ENTRY *List, | |
1445 | IN CONST LIST_ENTRY *Node | |
1446 | ); | |
1447 | ||
d57e9bdc | 1448 | |
d958721a | 1449 | /** |
1450 | Swaps the location of two nodes in a doubly linked list, and returns the | |
1451 | first node after the swap. | |
1452 | ||
1453 | If FirstEntry is identical to SecondEntry, then SecondEntry is returned. | |
1454 | Otherwise, the location of the FirstEntry node is swapped with the location | |
1455 | of the SecondEntry node in a doubly linked list. SecondEntry must be in the | |
1456 | same double linked list as FirstEntry and that double linked list must have | |
1457 | been initialized with InitializeListHead(). SecondEntry is returned after the | |
1458 | nodes are swapped. | |
1459 | ||
1460 | If FirstEntry is NULL, then ASSERT(). | |
1461 | If SecondEntry is NULL, then ASSERT(). | |
1462 | If SecondEntry and FirstEntry are not in the same linked list, then ASSERT(). | |
1463 | If PcdMaximumLinkedListLength is not zero, and the number of nodes in the | |
1464 | linked list containing the FirstEntry and SecondEntry nodes, including | |
1465 | the FirstEntry and SecondEntry nodes, is greater than or equal to | |
1466 | PcdMaximumLinkedListLength, then ASSERT(). | |
1467 | ||
1468 | @param FirstEntry A pointer to a node in a linked list. | |
1469 | @param SecondEntry A pointer to another node in the same linked list. | |
1470 | ||
1471 | **/ | |
1472 | LIST_ENTRY * | |
1473 | EFIAPI | |
1474 | SwapListEntries ( | |
1475 | IN LIST_ENTRY *FirstEntry, | |
1476 | IN LIST_ENTRY *SecondEntry | |
1477 | ); | |
1478 | ||
d57e9bdc | 1479 | |
d958721a | 1480 | /** |
1481 | Removes a node from a doubly linked list, and returns the node that follows | |
1482 | the removed node. | |
1483 | ||
1484 | Removes the node Entry from a doubly linked list. It is up to the caller of | |
1485 | this function to release the memory used by this node if that is required. On | |
1486 | exit, the node following Entry in the doubly linked list is returned. If | |
1487 | Entry is the only node in the linked list, then the head node of the linked | |
1488 | list is returned. | |
1489 | ||
1490 | If Entry is NULL, then ASSERT(). | |
1491 | If Entry is the head node of an empty list, then ASSERT(). | |
1492 | If PcdMaximumLinkedListLength is not zero, and the number of nodes in the | |
1493 | linked list containing Entry, including the Entry node, is greater than | |
1494 | or equal to PcdMaximumLinkedListLength, then ASSERT(). | |
1495 | ||
1496 | @param Entry A pointer to a node in a linked list | |
1497 | ||
1498 | @return Entry | |
1499 | ||
1500 | **/ | |
1501 | LIST_ENTRY * | |
1502 | EFIAPI | |
1503 | RemoveEntryList ( | |
1504 | IN CONST LIST_ENTRY *Entry | |
1505 | ); | |
1506 | ||
1507 | // | |
1508 | // Math Services | |
1509 | // | |
1510 | ||
1511 | /** | |
1512 | Shifts a 64-bit integer left between 0 and 63 bits. The low bits are filled | |
1513 | with zeros. The shifted value is returned. | |
1514 | ||
1515 | This function shifts the 64-bit value Operand to the left by Count bits. The | |
1516 | low Count bits are set to zero. The shifted value is returned. | |
1517 | ||
1518 | If Count is greater than 63, then ASSERT(). | |
1519 | ||
1520 | @param Operand The 64-bit operand to shift left. | |
1521 | @param Count The number of bits to shift left. | |
1522 | ||
1523 | @return Operand << Count | |
1524 | ||
1525 | **/ | |
1526 | UINT64 | |
1527 | EFIAPI | |
1528 | LShiftU64 ( | |
1529 | IN UINT64 Operand, | |
1530 | IN UINTN Count | |
1531 | ); | |
1532 | ||
d57e9bdc | 1533 | |
d958721a | 1534 | /** |
1535 | Shifts a 64-bit integer right between 0 and 63 bits. This high bits are | |
1536 | filled with zeros. The shifted value is returned. | |
1537 | ||
1538 | This function shifts the 64-bit value Operand to the right by Count bits. The | |
1539 | high Count bits are set to zero. The shifted value is returned. | |
1540 | ||
1541 | If Count is greater than 63, then ASSERT(). | |
1542 | ||
1543 | @param Operand The 64-bit operand to shift right. | |
1544 | @param Count The number of bits to shift right. | |
1545 | ||
1546 | @return Operand >> Count | |
1547 | ||
1548 | **/ | |
1549 | UINT64 | |
1550 | EFIAPI | |
1551 | RShiftU64 ( | |
1552 | IN UINT64 Operand, | |
1553 | IN UINTN Count | |
1554 | ); | |
1555 | ||
d57e9bdc | 1556 | |
d958721a | 1557 | /** |
1558 | Shifts a 64-bit integer right between 0 and 63 bits. The high bits are filled | |
1559 | with original integer's bit 63. The shifted value is returned. | |
1560 | ||
1561 | This function shifts the 64-bit value Operand to the right by Count bits. The | |
1562 | high Count bits are set to bit 63 of Operand. The shifted value is returned. | |
1563 | ||
1564 | If Count is greater than 63, then ASSERT(). | |
1565 | ||
1566 | @param Operand The 64-bit operand to shift right. | |
1567 | @param Count The number of bits to shift right. | |
1568 | ||
1569 | @return Operand >> Count | |
1570 | ||
1571 | **/ | |
1572 | UINT64 | |
1573 | EFIAPI | |
1574 | ARShiftU64 ( | |
1575 | IN UINT64 Operand, | |
1576 | IN UINTN Count | |
1577 | ); | |
1578 | ||
d57e9bdc | 1579 | |
d958721a | 1580 | /** |
1581 | Rotates a 32-bit integer left between 0 and 31 bits, filling the low bits | |
1582 | with the high bits that were rotated. | |
1583 | ||
1584 | This function rotates the 32-bit value Operand to the left by Count bits. The | |
1585 | low Count bits are fill with the high Count bits of Operand. The rotated | |
1586 | value is returned. | |
1587 | ||
1588 | If Count is greater than 31, then ASSERT(). | |
1589 | ||
1590 | @param Operand The 32-bit operand to rotate left. | |
1591 | @param Count The number of bits to rotate left. | |
1592 | ||
1593 | @return Operand <<< Count | |
1594 | ||
1595 | **/ | |
1596 | UINT32 | |
1597 | EFIAPI | |
1598 | LRotU32 ( | |
1599 | IN UINT32 Operand, | |
1600 | IN UINTN Count | |
1601 | ); | |
1602 | ||
d57e9bdc | 1603 | |
d958721a | 1604 | /** |
1605 | Rotates a 32-bit integer right between 0 and 31 bits, filling the high bits | |
1606 | with the low bits that were rotated. | |
1607 | ||
1608 | This function rotates the 32-bit value Operand to the right by Count bits. | |
1609 | The high Count bits are fill with the low Count bits of Operand. The rotated | |
1610 | value is returned. | |
1611 | ||
1612 | If Count is greater than 31, then ASSERT(). | |
1613 | ||
1614 | @param Operand The 32-bit operand to rotate right. | |
1615 | @param Count The number of bits to rotate right. | |
1616 | ||
1617 | @return Operand >>> Count | |
1618 | ||
1619 | **/ | |
1620 | UINT32 | |
1621 | EFIAPI | |
1622 | RRotU32 ( | |
1623 | IN UINT32 Operand, | |
1624 | IN UINTN Count | |
1625 | ); | |
1626 | ||
d57e9bdc | 1627 | |
d958721a | 1628 | /** |
1629 | Rotates a 64-bit integer left between 0 and 63 bits, filling the low bits | |
1630 | with the high bits that were rotated. | |
1631 | ||
1632 | This function rotates the 64-bit value Operand to the left by Count bits. The | |
1633 | low Count bits are fill with the high Count bits of Operand. The rotated | |
1634 | value is returned. | |
1635 | ||
1636 | If Count is greater than 63, then ASSERT(). | |
1637 | ||
1638 | @param Operand The 64-bit operand to rotate left. | |
1639 | @param Count The number of bits to rotate left. | |
1640 | ||
1641 | @return Operand <<< Count | |
1642 | ||
1643 | **/ | |
1644 | UINT64 | |
1645 | EFIAPI | |
1646 | LRotU64 ( | |
1647 | IN UINT64 Operand, | |
1648 | IN UINTN Count | |
1649 | ); | |
1650 | ||
d57e9bdc | 1651 | |
d958721a | 1652 | /** |
1653 | Rotates a 64-bit integer right between 0 and 63 bits, filling the high bits | |
1654 | with the high low bits that were rotated. | |
1655 | ||
1656 | This function rotates the 64-bit value Operand to the right by Count bits. | |
1657 | The high Count bits are fill with the low Count bits of Operand. The rotated | |
1658 | value is returned. | |
1659 | ||
1660 | If Count is greater than 63, then ASSERT(). | |
1661 | ||
1662 | @param Operand The 64-bit operand to rotate right. | |
1663 | @param Count The number of bits to rotate right. | |
1664 | ||
1665 | @return Operand >>> Count | |
1666 | ||
1667 | **/ | |
1668 | UINT64 | |
1669 | EFIAPI | |
1670 | RRotU64 ( | |
1671 | IN UINT64 Operand, | |
1672 | IN UINTN Count | |
1673 | ); | |
1674 | ||
d57e9bdc | 1675 | |
d958721a | 1676 | /** |
1677 | Returns the bit position of the lowest bit set in a 32-bit value. | |
1678 | ||
1679 | This function computes the bit position of the lowest bit set in the 32-bit | |
1680 | value specified by Operand. If Operand is zero, then -1 is returned. | |
1681 | Otherwise, a value between 0 and 31 is returned. | |
1682 | ||
1683 | @param Operand The 32-bit operand to evaluate. | |
1684 | ||
1685 | @return Position of the lowest bit set in Operand if found. | |
1686 | @retval -1 Operand is zero. | |
1687 | ||
1688 | **/ | |
1689 | INTN | |
1690 | EFIAPI | |
1691 | LowBitSet32 ( | |
1692 | IN UINT32 Operand | |
1693 | ); | |
1694 | ||
d57e9bdc | 1695 | |
d958721a | 1696 | /** |
1697 | Returns the bit position of the lowest bit set in a 64-bit value. | |
1698 | ||
1699 | This function computes the bit position of the lowest bit set in the 64-bit | |
1700 | value specified by Operand. If Operand is zero, then -1 is returned. | |
1701 | Otherwise, a value between 0 and 63 is returned. | |
1702 | ||
1703 | @param Operand The 64-bit operand to evaluate. | |
1704 | ||
1705 | @return Position of the lowest bit set in Operand if found. | |
1706 | @retval -1 Operand is zero. | |
1707 | ||
1708 | **/ | |
1709 | INTN | |
1710 | EFIAPI | |
1711 | LowBitSet64 ( | |
1712 | IN UINT64 Operand | |
1713 | ); | |
1714 | ||
d57e9bdc | 1715 | |
d958721a | 1716 | /** |
1717 | Returns the bit position of the highest bit set in a 32-bit value. Equivalent | |
1718 | to log2(x). | |
1719 | ||
1720 | This function computes the bit position of the highest bit set in the 32-bit | |
1721 | value specified by Operand. If Operand is zero, then -1 is returned. | |
1722 | Otherwise, a value between 0 and 31 is returned. | |
1723 | ||
1724 | @param Operand The 32-bit operand to evaluate. | |
1725 | ||
1726 | @return Position of the highest bit set in Operand if found. | |
1727 | @retval -1 Operand is zero. | |
1728 | ||
1729 | **/ | |
1730 | INTN | |
1731 | EFIAPI | |
1732 | HighBitSet32 ( | |
1733 | IN UINT32 Operand | |
1734 | ); | |
1735 | ||
d57e9bdc | 1736 | |
d958721a | 1737 | /** |
1738 | Returns the bit position of the highest bit set in a 64-bit value. Equivalent | |
1739 | to log2(x). | |
1740 | ||
1741 | This function computes the bit position of the highest bit set in the 64-bit | |
1742 | value specified by Operand. If Operand is zero, then -1 is returned. | |
1743 | Otherwise, a value between 0 and 63 is returned. | |
1744 | ||
1745 | @param Operand The 64-bit operand to evaluate. | |
1746 | ||
1747 | @return Position of the highest bit set in Operand if found. | |
1748 | @retval -1 Operand is zero. | |
1749 | ||
1750 | **/ | |
1751 | INTN | |
1752 | EFIAPI | |
1753 | HighBitSet64 ( | |
1754 | IN UINT64 Operand | |
1755 | ); | |
1756 | ||
d57e9bdc | 1757 | |
d958721a | 1758 | /** |
1759 | Returns the value of the highest bit set in a 32-bit value. Equivalent to | |
1760 | 1 << HighBitSet32(x). | |
1761 | ||
1762 | This function computes the value of the highest bit set in the 32-bit value | |
1763 | specified by Operand. If Operand is zero, then zero is returned. | |
1764 | ||
1765 | @param Operand The 32-bit operand to evaluate. | |
1766 | ||
1767 | @return 1 << HighBitSet32(Operand) | |
1768 | @retval 0 Operand is zero. | |
1769 | ||
1770 | **/ | |
1771 | UINT32 | |
1772 | EFIAPI | |
1773 | GetPowerOfTwo32 ( | |
1774 | IN UINT32 Operand | |
1775 | ); | |
1776 | ||
d57e9bdc | 1777 | |
d958721a | 1778 | /** |
1779 | Returns the value of the highest bit set in a 64-bit value. Equivalent to | |
1780 | 1 << HighBitSet64(x). | |
1781 | ||
1782 | This function computes the value of the highest bit set in the 64-bit value | |
1783 | specified by Operand. If Operand is zero, then zero is returned. | |
1784 | ||
1785 | @param Operand The 64-bit operand to evaluate. | |
1786 | ||
1787 | @return 1 << HighBitSet64(Operand) | |
1788 | @retval 0 Operand is zero. | |
1789 | ||
1790 | **/ | |
1791 | UINT64 | |
1792 | EFIAPI | |
1793 | GetPowerOfTwo64 ( | |
1794 | IN UINT64 Operand | |
1795 | ); | |
1796 | ||
d57e9bdc | 1797 | |
d958721a | 1798 | /** |
1799 | Switches the endianess of a 16-bit integer. | |
1800 | ||
1801 | This function swaps the bytes in a 16-bit unsigned value to switch the value | |
1802 | from little endian to big endian or vice versa. The byte swapped value is | |
1803 | returned. | |
1804 | ||
1805 | @param Operand A 16-bit unsigned value. | |
1806 | ||
1807 | @return The byte swaped Operand. | |
1808 | ||
1809 | **/ | |
1810 | UINT16 | |
1811 | EFIAPI | |
1812 | SwapBytes16 ( | |
1813 | IN UINT16 Value | |
1814 | ); | |
1815 | ||
d57e9bdc | 1816 | |
d958721a | 1817 | /** |
1818 | Switches the endianess of a 32-bit integer. | |
1819 | ||
1820 | This function swaps the bytes in a 32-bit unsigned value to switch the value | |
1821 | from little endian to big endian or vice versa. The byte swapped value is | |
1822 | returned. | |
1823 | ||
1824 | @param Operand A 32-bit unsigned value. | |
1825 | ||
1826 | @return The byte swaped Operand. | |
1827 | ||
1828 | **/ | |
1829 | UINT32 | |
1830 | EFIAPI | |
1831 | SwapBytes32 ( | |
1832 | IN UINT32 Value | |
1833 | ); | |
1834 | ||
d57e9bdc | 1835 | |
d958721a | 1836 | /** |
1837 | Switches the endianess of a 64-bit integer. | |
1838 | ||
1839 | This function swaps the bytes in a 64-bit unsigned value to switch the value | |
1840 | from little endian to big endian or vice versa. The byte swapped value is | |
1841 | returned. | |
1842 | ||
1843 | @param Operand A 64-bit unsigned value. | |
1844 | ||
1845 | @return The byte swaped Operand. | |
1846 | ||
1847 | **/ | |
1848 | UINT64 | |
1849 | EFIAPI | |
1850 | SwapBytes64 ( | |
1851 | IN UINT64 Value | |
1852 | ); | |
1853 | ||
d57e9bdc | 1854 | |
d958721a | 1855 | /** |
1856 | Multiples a 64-bit unsigned integer by a 32-bit unsigned integer and | |
1857 | generates a 64-bit unsigned result. | |
1858 | ||
1859 | This function multiples the 64-bit unsigned value Multiplicand by the 32-bit | |
1860 | unsigned value Multiplier and generates a 64-bit unsigned result. This 64- | |
1861 | bit unsigned result is returned. | |
1862 | ||
1863 | If the result overflows, then ASSERT(). | |
1864 | ||
1865 | @param Multiplicand A 64-bit unsigned value. | |
1866 | @param Multiplier A 32-bit unsigned value. | |
1867 | ||
1868 | @return Multiplicand * Multiplier | |
1869 | ||
1870 | **/ | |
1871 | UINT64 | |
1872 | EFIAPI | |
1873 | MultU64x32 ( | |
1874 | IN UINT64 Multiplicand, | |
1875 | IN UINT32 Multiplier | |
1876 | ); | |
1877 | ||
d57e9bdc | 1878 | |
d958721a | 1879 | /** |
1880 | Multiples a 64-bit unsigned integer by a 64-bit unsigned integer and | |
1881 | generates a 64-bit unsigned result. | |
1882 | ||
1883 | This function multiples the 64-bit unsigned value Multiplicand by the 64-bit | |
1884 | unsigned value Multiplier and generates a 64-bit unsigned result. This 64- | |
1885 | bit unsigned result is returned. | |
1886 | ||
1887 | If the result overflows, then ASSERT(). | |
1888 | ||
1889 | @param Multiplicand A 64-bit unsigned value. | |
1890 | @param Multiplier A 64-bit unsigned value. | |
1891 | ||
1892 | @return Multiplicand * Multiplier | |
1893 | ||
1894 | **/ | |
1895 | UINT64 | |
1896 | EFIAPI | |
1897 | MultU64x64 ( | |
1898 | IN UINT64 Multiplicand, | |
1899 | IN UINT64 Multiplier | |
1900 | ); | |
1901 | ||
d57e9bdc | 1902 | |
d958721a | 1903 | /** |
1904 | Multiples a 64-bit signed integer by a 64-bit signed integer and generates a | |
1905 | 64-bit signed result. | |
1906 | ||
1907 | This function multiples the 64-bit signed value Multiplicand by the 64-bit | |
1908 | signed value Multiplier and generates a 64-bit signed result. This 64-bit | |
1909 | signed result is returned. | |
1910 | ||
1911 | If the result overflows, then ASSERT(). | |
1912 | ||
1913 | @param Multiplicand A 64-bit signed value. | |
1914 | @param Multiplier A 64-bit signed value. | |
1915 | ||
1916 | @return Multiplicand * Multiplier | |
1917 | ||
1918 | **/ | |
1919 | INT64 | |
1920 | EFIAPI | |
1921 | MultS64x64 ( | |
1922 | IN INT64 Multiplicand, | |
1923 | IN INT64 Multiplier | |
1924 | ); | |
1925 | ||
d57e9bdc | 1926 | |
d958721a | 1927 | /** |
1928 | Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates | |
1929 | a 64-bit unsigned result. | |
1930 | ||
1931 | This function divides the 64-bit unsigned value Dividend by the 32-bit | |
1932 | unsigned value Divisor and generates a 64-bit unsigned quotient. This | |
1933 | function returns the 64-bit unsigned quotient. | |
1934 | ||
1935 | If Divisor is 0, then ASSERT(). | |
1936 | ||
1937 | @param Dividend A 64-bit unsigned value. | |
1938 | @param Divisor A 32-bit unsigned value. | |
1939 | ||
1940 | @return Dividend / Divisor | |
1941 | ||
1942 | **/ | |
1943 | UINT64 | |
1944 | EFIAPI | |
1945 | DivU64x32 ( | |
1946 | IN UINT64 Dividend, | |
1947 | IN UINT32 Divisor | |
1948 | ); | |
1949 | ||
d57e9bdc | 1950 | |
d958721a | 1951 | /** |
1952 | Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates | |
1953 | a 32-bit unsigned remainder. | |
1954 | ||
1955 | This function divides the 64-bit unsigned value Dividend by the 32-bit | |
1956 | unsigned value Divisor and generates a 32-bit remainder. This function | |
1957 | returns the 32-bit unsigned remainder. | |
1958 | ||
1959 | If Divisor is 0, then ASSERT(). | |
1960 | ||
1961 | @param Dividend A 64-bit unsigned value. | |
1962 | @param Divisor A 32-bit unsigned value. | |
1963 | ||
1964 | @return Dividend % Divisor | |
1965 | ||
1966 | **/ | |
1967 | UINT32 | |
1968 | EFIAPI | |
1969 | ModU64x32 ( | |
1970 | IN UINT64 Dividend, | |
1971 | IN UINT32 Divisor | |
1972 | ); | |
1973 | ||
d57e9bdc | 1974 | |
d958721a | 1975 | /** |
1976 | Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates | |
1977 | a 64-bit unsigned result and an optional 32-bit unsigned remainder. | |
1978 | ||
1979 | This function divides the 64-bit unsigned value Dividend by the 32-bit | |
1980 | unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder | |
1981 | is not NULL, then the 32-bit unsigned remainder is returned in Remainder. | |
1982 | This function returns the 64-bit unsigned quotient. | |
1983 | ||
1984 | If Divisor is 0, then ASSERT(). | |
1985 | ||
1986 | @param Dividend A 64-bit unsigned value. | |
1987 | @param Divisor A 32-bit unsigned value. | |
1988 | @param Remainder A pointer to a 32-bit unsigned value. This parameter is | |
1989 | optional and may be NULL. | |
1990 | ||
1991 | @return Dividend / Divisor | |
1992 | ||
1993 | **/ | |
1994 | UINT64 | |
1995 | EFIAPI | |
1996 | DivU64x32Remainder ( | |
1997 | IN UINT64 Dividend, | |
1998 | IN UINT32 Divisor, | |
1999 | OUT UINT32 *Remainder OPTIONAL | |
2000 | ); | |
2001 | ||
d57e9bdc | 2002 | |
d958721a | 2003 | /** |
2004 | Divides a 64-bit unsigned integer by a 64-bit unsigned integer and generates | |
2005 | a 64-bit unsigned result and an optional 64-bit unsigned remainder. | |
2006 | ||
2007 | This function divides the 64-bit unsigned value Dividend by the 64-bit | |
2008 | unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder | |
2009 | is not NULL, then the 64-bit unsigned remainder is returned in Remainder. | |
2010 | This function returns the 64-bit unsigned quotient. | |
2011 | ||
2012 | If Divisor is 0, then ASSERT(). | |
2013 | ||
2014 | @param Dividend A 64-bit unsigned value. | |
2015 | @param Divisor A 64-bit unsigned value. | |
2016 | @param Remainder A pointer to a 64-bit unsigned value. This parameter is | |
2017 | optional and may be NULL. | |
2018 | ||
2019 | @return Dividend / Divisor | |
2020 | ||
2021 | **/ | |
2022 | UINT64 | |
2023 | EFIAPI | |
2024 | DivU64x64Remainder ( | |
2025 | IN UINT64 Dividend, | |
2026 | IN UINT64 Divisor, | |
2027 | OUT UINT64 *Remainder OPTIONAL | |
2028 | ); | |
2029 | ||
d57e9bdc | 2030 | |
d958721a | 2031 | /** |
2032 | Divides a 64-bit signed integer by a 64-bit signed integer and generates a | |
2033 | 64-bit signed result and a optional 64-bit signed remainder. | |
2034 | ||
2035 | This function divides the 64-bit signed value Dividend by the 64-bit signed | |
2036 | value Divisor and generates a 64-bit signed quotient. If Remainder is not | |
2037 | NULL, then the 64-bit signed remainder is returned in Remainder. This | |
2038 | function returns the 64-bit signed quotient. | |
2039 | ||
2040 | If Divisor is 0, then ASSERT(). | |
2041 | ||
2042 | @param Dividend A 64-bit signed value. | |
2043 | @param Divisor A 64-bit signed value. | |
2044 | @param Remainder A pointer to a 64-bit signed value. This parameter is | |
2045 | optional and may be NULL. | |
2046 | ||
2047 | @return Dividend / Divisor | |
2048 | ||
2049 | **/ | |
2050 | INT64 | |
2051 | EFIAPI | |
2052 | DivS64x64Remainder ( | |
2053 | IN INT64 Dividend, | |
2054 | IN INT64 Divisor, | |
2055 | OUT INT64 *Remainder OPTIONAL | |
2056 | ); | |
2057 | ||
d57e9bdc | 2058 | |
d958721a | 2059 | /** |
2060 | Reads a 16-bit value from memory that may be unaligned. | |
2061 | ||
2062 | This function returns the 16-bit value pointed to by Buffer. The function | |
2063 | guarantees that the read operation does not produce an alignment fault. | |
2064 | ||
2065 | If the Buffer is NULL, then ASSERT(). | |
2066 | ||
2067 | @param Buffer Pointer to a 16-bit value that may be unaligned. | |
2068 | ||
2069 | @return *Uint16 | |
2070 | ||
2071 | **/ | |
2072 | UINT16 | |
2073 | EFIAPI | |
2074 | ReadUnaligned16 ( | |
2075 | IN CONST UINT16 *Uint16 | |
2076 | ); | |
2077 | ||
d57e9bdc | 2078 | |
d958721a | 2079 | /** |
2080 | Writes a 16-bit value to memory that may be unaligned. | |
2081 | ||
2082 | This function writes the 16-bit value specified by Value to Buffer. Value is | |
2083 | returned. The function guarantees that the write operation does not produce | |
2084 | an alignment fault. | |
2085 | ||
2086 | If the Buffer is NULL, then ASSERT(). | |
2087 | ||
2088 | @param Buffer Pointer to a 16-bit value that may be unaligned. | |
2089 | @param Value 16-bit value to write to Buffer. | |
2090 | ||
2091 | @return Value | |
2092 | ||
2093 | **/ | |
2094 | UINT16 | |
2095 | EFIAPI | |
2096 | WriteUnaligned16 ( | |
2097 | OUT UINT16 *Uint16, | |
2098 | IN UINT16 Value | |
2099 | ); | |
2100 | ||
d57e9bdc | 2101 | |
d958721a | 2102 | /** |
2103 | Reads a 24-bit value from memory that may be unaligned. | |
2104 | ||
2105 | This function returns the 24-bit value pointed to by Buffer. The function | |
2106 | guarantees that the read operation does not produce an alignment fault. | |
2107 | ||
2108 | If the Buffer is NULL, then ASSERT(). | |
2109 | ||
2110 | @param Buffer Pointer to a 24-bit value that may be unaligned. | |
2111 | ||
2112 | @return The value read. | |
2113 | ||
2114 | **/ | |
2115 | UINT32 | |
2116 | EFIAPI | |
2117 | ReadUnaligned24 ( | |
2118 | IN CONST UINT32 *Buffer | |
2119 | ); | |
2120 | ||
d57e9bdc | 2121 | |
d958721a | 2122 | /** |
2123 | Writes a 24-bit value to memory that may be unaligned. | |
2124 | ||
2125 | This function writes the 24-bit value specified by Value to Buffer. Value is | |
2126 | returned. The function guarantees that the write operation does not produce | |
2127 | an alignment fault. | |
2128 | ||
2129 | If the Buffer is NULL, then ASSERT(). | |
2130 | ||
2131 | @param Buffer Pointer to a 24-bit value that may be unaligned. | |
2132 | @param Value 24-bit value to write to Buffer. | |
2133 | ||
2134 | @return The value written. | |
2135 | ||
2136 | **/ | |
2137 | UINT32 | |
2138 | EFIAPI | |
2139 | WriteUnaligned24 ( | |
2140 | OUT UINT32 *Buffer, | |
2141 | IN UINT32 Value | |
2142 | ); | |
2143 | ||
d57e9bdc | 2144 | |
d958721a | 2145 | /** |
2146 | Reads a 32-bit value from memory that may be unaligned. | |
2147 | ||
2148 | This function returns the 32-bit value pointed to by Buffer. The function | |
2149 | guarantees that the read operation does not produce an alignment fault. | |
2150 | ||
2151 | If the Buffer is NULL, then ASSERT(). | |
2152 | ||
2153 | @param Buffer Pointer to a 32-bit value that may be unaligned. | |
2154 | ||
2155 | @return *Uint32 | |
2156 | ||
2157 | **/ | |
2158 | UINT32 | |
2159 | EFIAPI | |
2160 | ReadUnaligned32 ( | |
2161 | IN CONST UINT32 *Uint32 | |
2162 | ); | |
2163 | ||
d57e9bdc | 2164 | |
d958721a | 2165 | /** |
2166 | Writes a 32-bit value to memory that may be unaligned. | |
2167 | ||
2168 | This function writes the 32-bit value specified by Value to Buffer. Value is | |
2169 | returned. The function guarantees that the write operation does not produce | |
2170 | an alignment fault. | |
2171 | ||
2172 | If the Buffer is NULL, then ASSERT(). | |
2173 | ||
2174 | @param Buffer Pointer to a 32-bit value that may be unaligned. | |
2175 | @param Value 32-bit value to write to Buffer. | |
2176 | ||
2177 | @return Value | |
2178 | ||
2179 | **/ | |
2180 | UINT32 | |
2181 | EFIAPI | |
2182 | WriteUnaligned32 ( | |
2183 | OUT UINT32 *Uint32, | |
2184 | IN UINT32 Value | |
2185 | ); | |
2186 | ||
d57e9bdc | 2187 | |
d958721a | 2188 | /** |
2189 | Reads a 64-bit value from memory that may be unaligned. | |
2190 | ||
2191 | This function returns the 64-bit value pointed to by Buffer. The function | |
2192 | guarantees that the read operation does not produce an alignment fault. | |
2193 | ||
2194 | If the Buffer is NULL, then ASSERT(). | |
2195 | ||
2196 | @param Buffer Pointer to a 64-bit value that may be unaligned. | |
2197 | ||
2198 | @return *Uint64 | |
2199 | ||
2200 | **/ | |
2201 | UINT64 | |
2202 | EFIAPI | |
2203 | ReadUnaligned64 ( | |
2204 | IN CONST UINT64 *Uint64 | |
2205 | ); | |
2206 | ||
d57e9bdc | 2207 | |
d958721a | 2208 | /** |
2209 | Writes a 64-bit value to memory that may be unaligned. | |
2210 | ||
2211 | This function writes the 64-bit value specified by Value to Buffer. Value is | |
2212 | returned. The function guarantees that the write operation does not produce | |
2213 | an alignment fault. | |
2214 | ||
2215 | If the Buffer is NULL, then ASSERT(). | |
2216 | ||
2217 | @param Buffer Pointer to a 64-bit value that may be unaligned. | |
2218 | @param Value 64-bit value to write to Buffer. | |
2219 | ||
2220 | @return Value | |
2221 | ||
2222 | **/ | |
2223 | UINT64 | |
2224 | EFIAPI | |
2225 | WriteUnaligned64 ( | |
2226 | OUT UINT64 *Uint64, | |
2227 | IN UINT64 Value | |
2228 | ); | |
2229 | ||
d57e9bdc | 2230 | |
d958721a | 2231 | // |
2232 | // Bit Field Functions | |
2233 | // | |
2234 | ||
2235 | /** | |
2236 | Returns a bit field from an 8-bit value. | |
2237 | ||
2238 | Returns the bitfield specified by the StartBit and the EndBit from Operand. | |
2239 | ||
2240 | If 8-bit operations are not supported, then ASSERT(). | |
2241 | If StartBit is greater than 7, then ASSERT(). | |
2242 | If EndBit is greater than 7, then ASSERT(). | |
2243 | If EndBit is less than StartBit, then ASSERT(). | |
2244 | ||
2245 | @param Operand Operand on which to perform the bitfield operation. | |
2246 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2247 | Range 0..7. | |
2248 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2249 | Range 0..7. | |
2250 | ||
2251 | @return The bit field read. | |
2252 | ||
2253 | **/ | |
2254 | UINT8 | |
2255 | EFIAPI | |
2256 | BitFieldRead8 ( | |
2257 | IN UINT8 Operand, | |
2258 | IN UINTN StartBit, | |
2259 | IN UINTN EndBit | |
2260 | ); | |
2261 | ||
d57e9bdc | 2262 | |
d958721a | 2263 | /** |
2264 | Writes a bit field to an 8-bit value, and returns the result. | |
2265 | ||
2266 | Writes Value to the bit field specified by the StartBit and the EndBit in | |
2267 | Operand. All other bits in Operand are preserved. The new 8-bit value is | |
2268 | returned. | |
2269 | ||
2270 | If 8-bit operations are not supported, then ASSERT(). | |
2271 | If StartBit is greater than 7, then ASSERT(). | |
2272 | If EndBit is greater than 7, then ASSERT(). | |
2273 | If EndBit is less than StartBit, then ASSERT(). | |
2274 | ||
2275 | @param Operand Operand on which to perform the bitfield operation. | |
2276 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2277 | Range 0..7. | |
2278 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2279 | Range 0..7. | |
2280 | @param Value New value of the bit field. | |
2281 | ||
2282 | @return The new 8-bit value. | |
2283 | ||
2284 | **/ | |
2285 | UINT8 | |
2286 | EFIAPI | |
2287 | BitFieldWrite8 ( | |
2288 | IN UINT8 Operand, | |
2289 | IN UINTN StartBit, | |
2290 | IN UINTN EndBit, | |
2291 | IN UINT8 Value | |
2292 | ); | |
2293 | ||
d57e9bdc | 2294 | |
d958721a | 2295 | /** |
2296 | Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the | |
2297 | result. | |
2298 | ||
2299 | Performs a bitwise inclusive OR between the bit field specified by StartBit | |
2300 | and EndBit in Operand and the value specified by OrData. All other bits in | |
2301 | Operand are preserved. The new 8-bit value is returned. | |
2302 | ||
2303 | If 8-bit operations are not supported, then ASSERT(). | |
2304 | If StartBit is greater than 7, then ASSERT(). | |
2305 | If EndBit is greater than 7, then ASSERT(). | |
2306 | If EndBit is less than StartBit, then ASSERT(). | |
2307 | ||
2308 | @param Operand Operand on which to perform the bitfield operation. | |
2309 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2310 | Range 0..7. | |
2311 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2312 | Range 0..7. | |
2313 | @param OrData The value to OR with the read value from the value | |
2314 | ||
2315 | @return The new 8-bit value. | |
2316 | ||
2317 | **/ | |
2318 | UINT8 | |
2319 | EFIAPI | |
2320 | BitFieldOr8 ( | |
2321 | IN UINT8 Operand, | |
2322 | IN UINTN StartBit, | |
2323 | IN UINTN EndBit, | |
2324 | IN UINT8 OrData | |
2325 | ); | |
2326 | ||
d57e9bdc | 2327 | |
d958721a | 2328 | /** |
2329 | Reads a bit field from an 8-bit value, performs a bitwise AND, and returns | |
2330 | the result. | |
2331 | ||
2332 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2333 | in Operand and the value specified by AndData. All other bits in Operand are | |
2334 | preserved. The new 8-bit value is returned. | |
2335 | ||
2336 | If 8-bit operations are not supported, then ASSERT(). | |
2337 | If StartBit is greater than 7, then ASSERT(). | |
2338 | If EndBit is greater than 7, then ASSERT(). | |
2339 | If EndBit is less than StartBit, then ASSERT(). | |
2340 | ||
2341 | @param Operand Operand on which to perform the bitfield operation. | |
2342 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2343 | Range 0..7. | |
2344 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2345 | Range 0..7. | |
2346 | @param AndData The value to AND with the read value from the value. | |
2347 | ||
2348 | @return The new 8-bit value. | |
2349 | ||
2350 | **/ | |
2351 | UINT8 | |
2352 | EFIAPI | |
2353 | BitFieldAnd8 ( | |
2354 | IN UINT8 Operand, | |
2355 | IN UINTN StartBit, | |
2356 | IN UINTN EndBit, | |
2357 | IN UINT8 AndData | |
2358 | ); | |
2359 | ||
d57e9bdc | 2360 | |
d958721a | 2361 | /** |
2362 | Reads a bit field from an 8-bit value, performs a bitwise AND followed by a | |
2363 | bitwise OR, and returns the result. | |
2364 | ||
2365 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2366 | in Operand and the value specified by AndData, followed by a bitwise | |
2367 | inclusive OR with value specified by OrData. All other bits in Operand are | |
2368 | preserved. The new 8-bit value is returned. | |
2369 | ||
2370 | If 8-bit operations are not supported, then ASSERT(). | |
2371 | If StartBit is greater than 7, then ASSERT(). | |
2372 | If EndBit is greater than 7, then ASSERT(). | |
2373 | If EndBit is less than StartBit, then ASSERT(). | |
2374 | ||
2375 | @param Operand Operand on which to perform the bitfield operation. | |
2376 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2377 | Range 0..7. | |
2378 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2379 | Range 0..7. | |
2380 | @param AndData The value to AND with the read value from the value. | |
2381 | @param OrData The value to OR with the result of the AND operation. | |
2382 | ||
2383 | @return The new 8-bit value. | |
2384 | ||
2385 | **/ | |
2386 | UINT8 | |
2387 | EFIAPI | |
2388 | BitFieldAndThenOr8 ( | |
2389 | IN UINT8 Operand, | |
2390 | IN UINTN StartBit, | |
2391 | IN UINTN EndBit, | |
2392 | IN UINT8 AndData, | |
2393 | IN UINT8 OrData | |
2394 | ); | |
2395 | ||
d57e9bdc | 2396 | |
d958721a | 2397 | /** |
2398 | Returns a bit field from a 16-bit value. | |
2399 | ||
2400 | Returns the bitfield specified by the StartBit and the EndBit from Operand. | |
2401 | ||
2402 | If 16-bit operations are not supported, then ASSERT(). | |
2403 | If StartBit is greater than 15, then ASSERT(). | |
2404 | If EndBit is greater than 15, then ASSERT(). | |
2405 | If EndBit is less than StartBit, then ASSERT(). | |
2406 | ||
2407 | @param Operand Operand on which to perform the bitfield operation. | |
2408 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2409 | Range 0..15. | |
2410 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2411 | Range 0..15. | |
2412 | ||
2413 | @return The bit field read. | |
2414 | ||
2415 | **/ | |
2416 | UINT16 | |
2417 | EFIAPI | |
2418 | BitFieldRead16 ( | |
2419 | IN UINT16 Operand, | |
2420 | IN UINTN StartBit, | |
2421 | IN UINTN EndBit | |
2422 | ); | |
2423 | ||
d57e9bdc | 2424 | |
d958721a | 2425 | /** |
2426 | Writes a bit field to a 16-bit value, and returns the result. | |
2427 | ||
2428 | Writes Value to the bit field specified by the StartBit and the EndBit in | |
2429 | Operand. All other bits in Operand are preserved. The new 16-bit value is | |
2430 | returned. | |
2431 | ||
2432 | If 16-bit operations are not supported, then ASSERT(). | |
2433 | If StartBit is greater than 15, then ASSERT(). | |
2434 | If EndBit is greater than 15, then ASSERT(). | |
2435 | If EndBit is less than StartBit, then ASSERT(). | |
2436 | ||
2437 | @param Operand Operand on which to perform the bitfield operation. | |
2438 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2439 | Range 0..15. | |
2440 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2441 | Range 0..15. | |
2442 | @param Value New value of the bit field. | |
2443 | ||
2444 | @return The new 16-bit value. | |
2445 | ||
2446 | **/ | |
2447 | UINT16 | |
2448 | EFIAPI | |
2449 | BitFieldWrite16 ( | |
2450 | IN UINT16 Operand, | |
2451 | IN UINTN StartBit, | |
2452 | IN UINTN EndBit, | |
2453 | IN UINT16 Value | |
2454 | ); | |
2455 | ||
d57e9bdc | 2456 | |
d958721a | 2457 | /** |
2458 | Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the | |
2459 | result. | |
2460 | ||
2461 | Performs a bitwise inclusive OR between the bit field specified by StartBit | |
2462 | and EndBit in Operand and the value specified by OrData. All other bits in | |
2463 | Operand are preserved. The new 16-bit value is returned. | |
2464 | ||
2465 | If 16-bit operations are not supported, then ASSERT(). | |
2466 | If StartBit is greater than 15, then ASSERT(). | |
2467 | If EndBit is greater than 15, then ASSERT(). | |
2468 | If EndBit is less than StartBit, then ASSERT(). | |
2469 | ||
2470 | @param Operand Operand on which to perform the bitfield operation. | |
2471 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2472 | Range 0..15. | |
2473 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2474 | Range 0..15. | |
2475 | @param OrData The value to OR with the read value from the value | |
2476 | ||
2477 | @return The new 16-bit value. | |
2478 | ||
2479 | **/ | |
2480 | UINT16 | |
2481 | EFIAPI | |
2482 | BitFieldOr16 ( | |
2483 | IN UINT16 Operand, | |
2484 | IN UINTN StartBit, | |
2485 | IN UINTN EndBit, | |
2486 | IN UINT16 OrData | |
2487 | ); | |
2488 | ||
d57e9bdc | 2489 | |
d958721a | 2490 | /** |
2491 | Reads a bit field from a 16-bit value, performs a bitwise AND, and returns | |
2492 | the result. | |
2493 | ||
2494 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2495 | in Operand and the value specified by AndData. All other bits in Operand are | |
2496 | preserved. The new 16-bit value is returned. | |
2497 | ||
2498 | If 16-bit operations are not supported, then ASSERT(). | |
2499 | If StartBit is greater than 15, then ASSERT(). | |
2500 | If EndBit is greater than 15, then ASSERT(). | |
2501 | If EndBit is less than StartBit, then ASSERT(). | |
2502 | ||
2503 | @param Operand Operand on which to perform the bitfield operation. | |
2504 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2505 | Range 0..15. | |
2506 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2507 | Range 0..15. | |
2508 | @param AndData The value to AND with the read value from the value | |
2509 | ||
2510 | @return The new 16-bit value. | |
2511 | ||
2512 | **/ | |
2513 | UINT16 | |
2514 | EFIAPI | |
2515 | BitFieldAnd16 ( | |
2516 | IN UINT16 Operand, | |
2517 | IN UINTN StartBit, | |
2518 | IN UINTN EndBit, | |
2519 | IN UINT16 AndData | |
2520 | ); | |
2521 | ||
d57e9bdc | 2522 | |
d958721a | 2523 | /** |
2524 | Reads a bit field from a 16-bit value, performs a bitwise AND followed by a | |
2525 | bitwise OR, and returns the result. | |
2526 | ||
2527 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2528 | in Operand and the value specified by AndData, followed by a bitwise | |
2529 | inclusive OR with value specified by OrData. All other bits in Operand are | |
2530 | preserved. The new 16-bit value is returned. | |
2531 | ||
2532 | If 16-bit operations are not supported, then ASSERT(). | |
2533 | If StartBit is greater than 15, then ASSERT(). | |
2534 | If EndBit is greater than 15, then ASSERT(). | |
2535 | If EndBit is less than StartBit, then ASSERT(). | |
2536 | ||
2537 | @param Operand Operand on which to perform the bitfield operation. | |
2538 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2539 | Range 0..15. | |
2540 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2541 | Range 0..15. | |
2542 | @param AndData The value to AND with the read value from the value. | |
2543 | @param OrData The value to OR with the result of the AND operation. | |
2544 | ||
2545 | @return The new 16-bit value. | |
2546 | ||
2547 | **/ | |
2548 | UINT16 | |
2549 | EFIAPI | |
2550 | BitFieldAndThenOr16 ( | |
2551 | IN UINT16 Operand, | |
2552 | IN UINTN StartBit, | |
2553 | IN UINTN EndBit, | |
2554 | IN UINT16 AndData, | |
2555 | IN UINT16 OrData | |
2556 | ); | |
2557 | ||
d57e9bdc | 2558 | |
d958721a | 2559 | /** |
2560 | Returns a bit field from a 32-bit value. | |
2561 | ||
2562 | Returns the bitfield specified by the StartBit and the EndBit from Operand. | |
2563 | ||
2564 | If 32-bit operations are not supported, then ASSERT(). | |
2565 | If StartBit is greater than 31, then ASSERT(). | |
2566 | If EndBit is greater than 31, then ASSERT(). | |
2567 | If EndBit is less than StartBit, then ASSERT(). | |
2568 | ||
2569 | @param Operand Operand on which to perform the bitfield operation. | |
2570 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2571 | Range 0..31. | |
2572 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2573 | Range 0..31. | |
2574 | ||
2575 | @return The bit field read. | |
2576 | ||
2577 | **/ | |
2578 | UINT32 | |
2579 | EFIAPI | |
2580 | BitFieldRead32 ( | |
2581 | IN UINT32 Operand, | |
2582 | IN UINTN StartBit, | |
2583 | IN UINTN EndBit | |
2584 | ); | |
2585 | ||
d57e9bdc | 2586 | |
d958721a | 2587 | /** |
2588 | Writes a bit field to a 32-bit value, and returns the result. | |
2589 | ||
2590 | Writes Value to the bit field specified by the StartBit and the EndBit in | |
2591 | Operand. All other bits in Operand are preserved. The new 32-bit value is | |
2592 | returned. | |
2593 | ||
2594 | If 32-bit operations are not supported, then ASSERT(). | |
2595 | If StartBit is greater than 31, then ASSERT(). | |
2596 | If EndBit is greater than 31, then ASSERT(). | |
2597 | If EndBit is less than StartBit, then ASSERT(). | |
2598 | ||
2599 | @param Operand Operand on which to perform the bitfield operation. | |
2600 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2601 | Range 0..31. | |
2602 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2603 | Range 0..31. | |
2604 | @param Value New value of the bit field. | |
2605 | ||
2606 | @return The new 32-bit value. | |
2607 | ||
2608 | **/ | |
2609 | UINT32 | |
2610 | EFIAPI | |
2611 | BitFieldWrite32 ( | |
2612 | IN UINT32 Operand, | |
2613 | IN UINTN StartBit, | |
2614 | IN UINTN EndBit, | |
2615 | IN UINT32 Value | |
2616 | ); | |
2617 | ||
d57e9bdc | 2618 | |
d958721a | 2619 | /** |
2620 | Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the | |
2621 | result. | |
2622 | ||
2623 | Performs a bitwise inclusive OR between the bit field specified by StartBit | |
2624 | and EndBit in Operand and the value specified by OrData. All other bits in | |
2625 | Operand are preserved. The new 32-bit value is returned. | |
2626 | ||
2627 | If 32-bit operations are not supported, then ASSERT(). | |
2628 | If StartBit is greater than 31, then ASSERT(). | |
2629 | If EndBit is greater than 31, then ASSERT(). | |
2630 | If EndBit is less than StartBit, then ASSERT(). | |
2631 | ||
2632 | @param Operand Operand on which to perform the bitfield operation. | |
2633 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2634 | Range 0..31. | |
2635 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2636 | Range 0..31. | |
2637 | @param OrData The value to OR with the read value from the value | |
2638 | ||
2639 | @return The new 32-bit value. | |
2640 | ||
2641 | **/ | |
2642 | UINT32 | |
2643 | EFIAPI | |
2644 | BitFieldOr32 ( | |
2645 | IN UINT32 Operand, | |
2646 | IN UINTN StartBit, | |
2647 | IN UINTN EndBit, | |
2648 | IN UINT32 OrData | |
2649 | ); | |
2650 | ||
d57e9bdc | 2651 | |
d958721a | 2652 | /** |
2653 | Reads a bit field from a 32-bit value, performs a bitwise AND, and returns | |
2654 | the result. | |
2655 | ||
2656 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2657 | in Operand and the value specified by AndData. All other bits in Operand are | |
2658 | preserved. The new 32-bit value is returned. | |
2659 | ||
2660 | If 32-bit operations are not supported, then ASSERT(). | |
2661 | If StartBit is greater than 31, then ASSERT(). | |
2662 | If EndBit is greater than 31, then ASSERT(). | |
2663 | If EndBit is less than StartBit, then ASSERT(). | |
2664 | ||
2665 | @param Operand Operand on which to perform the bitfield operation. | |
2666 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2667 | Range 0..31. | |
2668 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2669 | Range 0..31. | |
2670 | @param AndData The value to AND with the read value from the value | |
2671 | ||
2672 | @return The new 32-bit value. | |
2673 | ||
2674 | **/ | |
2675 | UINT32 | |
2676 | EFIAPI | |
2677 | BitFieldAnd32 ( | |
2678 | IN UINT32 Operand, | |
2679 | IN UINTN StartBit, | |
2680 | IN UINTN EndBit, | |
2681 | IN UINT32 AndData | |
2682 | ); | |
2683 | ||
d57e9bdc | 2684 | |
d958721a | 2685 | /** |
2686 | Reads a bit field from a 32-bit value, performs a bitwise AND followed by a | |
2687 | bitwise OR, and returns the result. | |
2688 | ||
2689 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2690 | in Operand and the value specified by AndData, followed by a bitwise | |
2691 | inclusive OR with value specified by OrData. All other bits in Operand are | |
2692 | preserved. The new 32-bit value is returned. | |
2693 | ||
2694 | If 32-bit operations are not supported, then ASSERT(). | |
2695 | If StartBit is greater than 31, then ASSERT(). | |
2696 | If EndBit is greater than 31, then ASSERT(). | |
2697 | If EndBit is less than StartBit, then ASSERT(). | |
2698 | ||
2699 | @param Operand Operand on which to perform the bitfield operation. | |
2700 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2701 | Range 0..31. | |
2702 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2703 | Range 0..31. | |
2704 | @param AndData The value to AND with the read value from the value. | |
2705 | @param OrData The value to OR with the result of the AND operation. | |
2706 | ||
2707 | @return The new 32-bit value. | |
2708 | ||
2709 | **/ | |
2710 | UINT32 | |
2711 | EFIAPI | |
2712 | BitFieldAndThenOr32 ( | |
2713 | IN UINT32 Operand, | |
2714 | IN UINTN StartBit, | |
2715 | IN UINTN EndBit, | |
2716 | IN UINT32 AndData, | |
2717 | IN UINT32 OrData | |
2718 | ); | |
2719 | ||
d57e9bdc | 2720 | |
d958721a | 2721 | /** |
2722 | Returns a bit field from a 64-bit value. | |
2723 | ||
2724 | Returns the bitfield specified by the StartBit and the EndBit from Operand. | |
2725 | ||
2726 | If 64-bit operations are not supported, then ASSERT(). | |
2727 | If StartBit is greater than 63, then ASSERT(). | |
2728 | If EndBit is greater than 63, then ASSERT(). | |
2729 | If EndBit is less than StartBit, then ASSERT(). | |
2730 | ||
2731 | @param Operand Operand on which to perform the bitfield operation. | |
2732 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2733 | Range 0..63. | |
2734 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2735 | Range 0..63. | |
2736 | ||
2737 | @return The bit field read. | |
2738 | ||
2739 | **/ | |
2740 | UINT64 | |
2741 | EFIAPI | |
2742 | BitFieldRead64 ( | |
2743 | IN UINT64 Operand, | |
2744 | IN UINTN StartBit, | |
2745 | IN UINTN EndBit | |
2746 | ); | |
2747 | ||
d57e9bdc | 2748 | |
d958721a | 2749 | /** |
2750 | Writes a bit field to a 64-bit value, and returns the result. | |
2751 | ||
2752 | Writes Value to the bit field specified by the StartBit and the EndBit in | |
2753 | Operand. All other bits in Operand are preserved. The new 64-bit value is | |
2754 | returned. | |
2755 | ||
2756 | If 64-bit operations are not supported, then ASSERT(). | |
2757 | If StartBit is greater than 63, then ASSERT(). | |
2758 | If EndBit is greater than 63, then ASSERT(). | |
2759 | If EndBit is less than StartBit, then ASSERT(). | |
2760 | ||
2761 | @param Operand Operand on which to perform the bitfield operation. | |
2762 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2763 | Range 0..63. | |
2764 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2765 | Range 0..63. | |
2766 | @param Value New value of the bit field. | |
2767 | ||
2768 | @return The new 64-bit value. | |
2769 | ||
2770 | **/ | |
2771 | UINT64 | |
2772 | EFIAPI | |
2773 | BitFieldWrite64 ( | |
2774 | IN UINT64 Operand, | |
2775 | IN UINTN StartBit, | |
2776 | IN UINTN EndBit, | |
2777 | IN UINT64 Value | |
2778 | ); | |
2779 | ||
d57e9bdc | 2780 | |
d958721a | 2781 | /** |
2782 | Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the | |
2783 | result. | |
2784 | ||
2785 | Performs a bitwise inclusive OR between the bit field specified by StartBit | |
2786 | and EndBit in Operand and the value specified by OrData. All other bits in | |
2787 | Operand are preserved. The new 64-bit value is returned. | |
2788 | ||
2789 | If 64-bit operations are not supported, then ASSERT(). | |
2790 | If StartBit is greater than 63, then ASSERT(). | |
2791 | If EndBit is greater than 63, then ASSERT(). | |
2792 | If EndBit is less than StartBit, then ASSERT(). | |
2793 | ||
2794 | @param Operand Operand on which to perform the bitfield operation. | |
2795 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2796 | Range 0..63. | |
2797 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2798 | Range 0..63. | |
2799 | @param OrData The value to OR with the read value from the value | |
2800 | ||
2801 | @return The new 64-bit value. | |
2802 | ||
2803 | **/ | |
2804 | UINT64 | |
2805 | EFIAPI | |
2806 | BitFieldOr64 ( | |
2807 | IN UINT64 Operand, | |
2808 | IN UINTN StartBit, | |
2809 | IN UINTN EndBit, | |
2810 | IN UINT64 OrData | |
2811 | ); | |
2812 | ||
d57e9bdc | 2813 | |
d958721a | 2814 | /** |
2815 | Reads a bit field from a 64-bit value, performs a bitwise AND, and returns | |
2816 | the result. | |
2817 | ||
2818 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2819 | in Operand and the value specified by AndData. All other bits in Operand are | |
2820 | preserved. The new 64-bit value is returned. | |
2821 | ||
2822 | If 64-bit operations are not supported, then ASSERT(). | |
2823 | If StartBit is greater than 63, then ASSERT(). | |
2824 | If EndBit is greater than 63, then ASSERT(). | |
2825 | If EndBit is less than StartBit, then ASSERT(). | |
2826 | ||
2827 | @param Operand Operand on which to perform the bitfield operation. | |
2828 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2829 | Range 0..63. | |
2830 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2831 | Range 0..63. | |
2832 | @param AndData The value to AND with the read value from the value | |
2833 | ||
2834 | @return The new 64-bit value. | |
2835 | ||
2836 | **/ | |
2837 | UINT64 | |
2838 | EFIAPI | |
2839 | BitFieldAnd64 ( | |
2840 | IN UINT64 Operand, | |
2841 | IN UINTN StartBit, | |
2842 | IN UINTN EndBit, | |
2843 | IN UINT64 AndData | |
2844 | ); | |
2845 | ||
d57e9bdc | 2846 | |
d958721a | 2847 | /** |
2848 | Reads a bit field from a 64-bit value, performs a bitwise AND followed by a | |
2849 | bitwise OR, and returns the result. | |
2850 | ||
2851 | Performs a bitwise AND between the bit field specified by StartBit and EndBit | |
2852 | in Operand and the value specified by AndData, followed by a bitwise | |
2853 | inclusive OR with value specified by OrData. All other bits in Operand are | |
2854 | preserved. The new 64-bit value is returned. | |
2855 | ||
2856 | If 64-bit operations are not supported, then ASSERT(). | |
2857 | If StartBit is greater than 63, then ASSERT(). | |
2858 | If EndBit is greater than 63, then ASSERT(). | |
2859 | If EndBit is less than StartBit, then ASSERT(). | |
2860 | ||
2861 | @param Operand Operand on which to perform the bitfield operation. | |
2862 | @param StartBit The ordinal of the least significant bit in the bit field. | |
2863 | Range 0..63. | |
2864 | @param EndBit The ordinal of the most significant bit in the bit field. | |
2865 | Range 0..63. | |
2866 | @param AndData The value to AND with the read value from the value. | |
2867 | @param OrData The value to OR with the result of the AND operation. | |
2868 | ||
2869 | @return The new 64-bit value. | |
2870 | ||
2871 | **/ | |
2872 | UINT64 | |
2873 | EFIAPI | |
2874 | BitFieldAndThenOr64 ( | |
2875 | IN UINT64 Operand, | |
2876 | IN UINTN StartBit, | |
2877 | IN UINTN EndBit, | |
2878 | IN UINT64 AndData, | |
2879 | IN UINT64 OrData | |
2880 | ); | |
2881 | ||
d57e9bdc | 2882 | |
d958721a | 2883 | // |
2884 | // Base Library Synchronization Functions | |
2885 | // | |
2886 | ||
2887 | /** | |
2888 | Retrieves the architecture specific spin lock alignment requirements for | |
2889 | optimal spin lock performance. | |
2890 | ||
2891 | This function retrieves the spin lock alignment requirements for optimal | |
2892 | performance on a given CPU architecture. The spin lock alignment must be a | |
2893 | power of two and is returned by this function. If there are no alignment | |
2894 | requirements, then 1 must be returned. The spin lock synchronization | |
2895 | functions must function correctly if the spin lock size and alignment values | |
2896 | returned by this function are not used at all. These values are hints to the | |
2897 | consumers of the spin lock synchronization functions to obtain optimal spin | |
2898 | lock performance. | |
2899 | ||
2900 | @return The architecture specific spin lock alignment. | |
2901 | ||
2902 | **/ | |
2903 | UINTN | |
2904 | EFIAPI | |
2905 | GetSpinLockProperties ( | |
2906 | VOID | |
2907 | ); | |
2908 | ||
d57e9bdc | 2909 | |
d958721a | 2910 | /** |
2911 | Initializes a spin lock to the released state and returns the spin lock. | |
2912 | ||
2913 | This function initializes the spin lock specified by SpinLock to the released | |
2914 | state, and returns SpinLock. Optimal performance can be achieved by calling | |
2915 | GetSpinLockProperties() to determine the size and alignment requirements for | |
2916 | SpinLock. | |
2917 | ||
2918 | If SpinLock is NULL, then ASSERT(). | |
2919 | ||
2920 | @param SpinLock A pointer to the spin lock to initialize to the released | |
2921 | state. | |
2922 | ||
2923 | @return SpinLock | |
2924 | ||
2925 | **/ | |
2926 | SPIN_LOCK * | |
2927 | EFIAPI | |
2928 | InitializeSpinLock ( | |
2929 | IN SPIN_LOCK *SpinLock | |
2930 | ); | |
2931 | ||
d57e9bdc | 2932 | |
d958721a | 2933 | /** |
2934 | Waits until a spin lock can be placed in the acquired state. | |
2935 | ||
2936 | This function checks the state of the spin lock specified by SpinLock. If | |
2937 | SpinLock is in the released state, then this function places SpinLock in the | |
2938 | acquired state and returns SpinLock. Otherwise, this function waits | |
2939 | indefinitely for the spin lock to be released, and then places it in the | |
2940 | acquired state and returns SpinLock. All state transitions of SpinLock must | |
2941 | be performed using MP safe mechanisms. | |
2942 | ||
2943 | If SpinLock is NULL, then ASSERT(). | |
2944 | If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). | |
2945 | If PcdSpinLockTimeout is not zero, and SpinLock is can not be acquired in | |
2946 | PcdSpinLockTimeout microseconds, then ASSERT(). | |
2947 | ||
2948 | @param SpinLock A pointer to the spin lock to place in the acquired state. | |
2949 | ||
2950 | @return SpinLock | |
2951 | ||
2952 | **/ | |
2953 | SPIN_LOCK * | |
2954 | EFIAPI | |
2955 | AcquireSpinLock ( | |
2956 | IN SPIN_LOCK *SpinLock | |
2957 | ); | |
2958 | ||
d57e9bdc | 2959 | |
d958721a | 2960 | /** |
2961 | Attempts to place a spin lock in the acquired state. | |
2962 | ||
2963 | This function checks the state of the spin lock specified by SpinLock. If | |
2964 | SpinLock is in the released state, then this function places SpinLock in the | |
2965 | acquired state and returns TRUE. Otherwise, FALSE is returned. All state | |
2966 | transitions of SpinLock must be performed using MP safe mechanisms. | |
2967 | ||
2968 | If SpinLock is NULL, then ASSERT(). | |
2969 | If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). | |
2970 | ||
2971 | @param SpinLock A pointer to the spin lock to place in the acquired state. | |
2972 | ||
2973 | @retval TRUE SpinLock was placed in the acquired state. | |
2974 | @retval FALSE SpinLock could not be acquired. | |
2975 | ||
2976 | **/ | |
2977 | BOOLEAN | |
2978 | EFIAPI | |
2979 | AcquireSpinLockOrFail ( | |
2980 | IN SPIN_LOCK *SpinLock | |
2981 | ); | |
2982 | ||
d57e9bdc | 2983 | |
d958721a | 2984 | /** |
2985 | Releases a spin lock. | |
2986 | ||
2987 | This function places the spin lock specified by SpinLock in the release state | |
2988 | and returns SpinLock. | |
2989 | ||
2990 | If SpinLock is NULL, then ASSERT(). | |
2991 | If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). | |
2992 | ||
2993 | @param SpinLock A pointer to the spin lock to release. | |
2994 | ||
2995 | @return SpinLock | |
2996 | ||
2997 | **/ | |
2998 | SPIN_LOCK * | |
2999 | EFIAPI | |
3000 | ReleaseSpinLock ( | |
3001 | IN SPIN_LOCK *SpinLock | |
3002 | ); | |
3003 | ||
d57e9bdc | 3004 | |
d958721a | 3005 | /** |
3006 | Performs an atomic increment of an 32-bit unsigned integer. | |
3007 | ||
3008 | Performs an atomic increment of the 32-bit unsigned integer specified by | |
3009 | Value and returns the incremented value. The increment operation must be | |
3010 | performed using MP safe mechanisms. The state of the return value is not | |
3011 | guaranteed to be MP safe. | |
3012 | ||
3013 | If Value is NULL, then ASSERT(). | |
3014 | ||
3015 | @param Value A pointer to the 32-bit value to increment. | |
3016 | ||
3017 | @return The incremented value. | |
3018 | ||
3019 | **/ | |
3020 | UINT32 | |
3021 | EFIAPI | |
3022 | InterlockedIncrement ( | |
3023 | IN UINT32 *Value | |
3024 | ); | |
3025 | ||
d57e9bdc | 3026 | |
d958721a | 3027 | /** |
3028 | Performs an atomic decrement of an 32-bit unsigned integer. | |
3029 | ||
3030 | Performs an atomic decrement of the 32-bit unsigned integer specified by | |
3031 | Value and returns the decremented value. The decrement operation must be | |
3032 | performed using MP safe mechanisms. The state of the return value is not | |
3033 | guaranteed to be MP safe. | |
3034 | ||
3035 | If Value is NULL, then ASSERT(). | |
3036 | ||
3037 | @param Value A pointer to the 32-bit value to decrement. | |
3038 | ||
3039 | @return The decremented value. | |
3040 | ||
3041 | **/ | |
3042 | UINT32 | |
3043 | EFIAPI | |
3044 | InterlockedDecrement ( | |
3045 | IN UINT32 *Value | |
3046 | ); | |
3047 | ||
d57e9bdc | 3048 | |
d958721a | 3049 | /** |
3050 | Performs an atomic compare exchange operation on a 32-bit unsigned integer. | |
3051 | ||
3052 | Performs an atomic compare exchange operation on the 32-bit unsigned integer | |
3053 | specified by Value. If Value is equal to CompareValue, then Value is set to | |
3054 | ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue, | |
3055 | then Value is returned. The compare exchange operation must be performed using | |
3056 | MP safe mechanisms. | |
3057 | ||
3058 | If Value is NULL, then ASSERT(). | |
3059 | ||
3060 | @param Value A pointer to the 32-bit value for the compare exchange | |
3061 | operation. | |
3062 | @param CompareValue 32-bit value used in compare operation. | |
3063 | @param ExchangeValue 32-bit value used in exchange operation. | |
3064 | ||
3065 | @return The original *Value before exchange. | |
3066 | ||
3067 | **/ | |
3068 | UINT32 | |
3069 | EFIAPI | |
3070 | InterlockedCompareExchange32 ( | |
3071 | IN OUT UINT32 *Value, | |
3072 | IN UINT32 CompareValue, | |
3073 | IN UINT32 ExchangeValue | |
3074 | ); | |
3075 | ||
d57e9bdc | 3076 | |
d958721a | 3077 | /** |
3078 | Performs an atomic compare exchange operation on a 64-bit unsigned integer. | |
3079 | ||
3080 | Performs an atomic compare exchange operation on the 64-bit unsigned integer specified | |
3081 | by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and | |
3082 | CompareValue is returned. If Value is not equal to CompareValue, then Value is returned. | |
3083 | The compare exchange operation must be performed using MP safe mechanisms. | |
3084 | ||
3085 | If Value is NULL, then ASSERT(). | |
3086 | ||
3087 | @param Value A pointer to the 64-bit value for the compare exchange | |
3088 | operation. | |
3089 | @param CompareValue 64-bit value used in compare operation. | |
3090 | @param ExchangeValue 64-bit value used in exchange operation. | |
3091 | ||
3092 | @return The original *Value before exchange. | |
3093 | ||
3094 | **/ | |
3095 | UINT64 | |
3096 | EFIAPI | |
3097 | InterlockedCompareExchange64 ( | |
3098 | IN OUT UINT64 *Value, | |
3099 | IN UINT64 CompareValue, | |
3100 | IN UINT64 ExchangeValue | |
3101 | ); | |
3102 | ||
d57e9bdc | 3103 | |
d958721a | 3104 | /** |
3105 | Performs an atomic compare exchange operation on a pointer value. | |
3106 | ||
3107 | Performs an atomic compare exchange operation on the pointer value specified | |
3108 | by Value. If Value is equal to CompareValue, then Value is set to | |
3109 | ExchangeValue and CompareValue is returned. If Value is not equal to | |
3110 | CompareValue, then Value is returned. The compare exchange operation must be | |
3111 | performed using MP safe mechanisms. | |
3112 | ||
3113 | If Value is NULL, then ASSERT(). | |
3114 | ||
3115 | @param Value A pointer to the pointer value for the compare exchange | |
3116 | operation. | |
3117 | @param CompareValue Pointer value used in compare operation. | |
3118 | @param ExchangeValue Pointer value used in exchange operation. | |
3119 | ||
3120 | **/ | |
3121 | VOID * | |
3122 | EFIAPI | |
3123 | InterlockedCompareExchangePointer ( | |
3124 | IN OUT VOID **Value, | |
3125 | IN VOID *CompareValue, | |
3126 | IN VOID *ExchangeValue | |
3127 | ); | |
3128 | ||
d57e9bdc | 3129 | |
d958721a | 3130 | // |
3131 | // Base Library Checksum Functions | |
3132 | // | |
3133 | ||
3134 | /** | |
cb41bea7 | 3135 | Calculate the sum of all elements in a buffer in unit of UINT8. |
d958721a | 3136 | During calculation, the carry bits are dropped. |
3137 | ||
cb41bea7 | 3138 | This function calculates the sum of all elements in a buffer |
3139 | in unit of UINT8. The carry bits in result of addition are dropped. | |
3140 | The result is returned as UINT8. If Length is Zero, then Zero is | |
d958721a | 3141 | returned. |
cb41bea7 | 3142 | |
d958721a | 3143 | If Buffer is NULL, then ASSERT(). |
cb41bea7 | 3144 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). |
d958721a | 3145 | |
3146 | @param Buffer Pointer to the buffer to carry out the sum operation. | |
3147 | @param Length The size, in bytes, of Buffer . | |
3148 | ||
3149 | @return Sum The sum of Buffer with carry bits dropped during additions. | |
3150 | ||
3151 | **/ | |
3152 | UINT8 | |
3153 | EFIAPI | |
3154 | CalculateSum8 ( | |
3155 | IN CONST UINT8 *Buffer, | |
3156 | IN UINTN Length | |
3157 | ); | |
3158 | ||
3159 | ||
3160 | /** | |
cb41bea7 | 3161 | Returns the two's complement checksum of all elements in a buffer |
d958721a | 3162 | of 8-bit values. |
3163 | ||
cb41bea7 | 3164 | This function first calculates the sum of the 8-bit values in the |
3165 | buffer specified by Buffer and Length. The carry bits in the result | |
3166 | of addition are dropped. Then, the two's complement of the sum is | |
d958721a | 3167 | returned. If Length is 0, then 0 is returned. |
cb41bea7 | 3168 | |
d958721a | 3169 | If Buffer is NULL, then ASSERT(). |
3170 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). | |
3171 | ||
3172 | ||
3173 | @param Buffer Pointer to the buffer to carry out the checksum operation. | |
3174 | @param Length The size, in bytes, of Buffer. | |
3175 | ||
3176 | @return Checksum The 2's complement checksum of Buffer. | |
3177 | ||
3178 | **/ | |
3179 | UINT8 | |
3180 | EFIAPI | |
3181 | CalculateCheckSum8 ( | |
3182 | IN CONST UINT8 *Buffer, | |
3183 | IN UINTN Length | |
3184 | ); | |
3185 | ||
d57e9bdc | 3186 | |
d958721a | 3187 | /** |
cb41bea7 | 3188 | Returns the sum of all elements in a buffer of 16-bit values. During |
d958721a | 3189 | calculation, the carry bits are dropped. |
3190 | ||
cb41bea7 | 3191 | This function calculates the sum of the 16-bit values in the buffer |
3192 | specified by Buffer and Length. The carry bits in result of addition are dropped. | |
3193 | The 16-bit result is returned. If Length is 0, then 0 is returned. | |
3194 | ||
d958721a | 3195 | If Buffer is NULL, then ASSERT(). |
3196 | If Buffer is not aligned on a 16-bit boundary, then ASSERT(). | |
3197 | If Length is not aligned on a 16-bit boundary, then ASSERT(). | |
3198 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). | |
3199 | ||
3200 | @param Buffer Pointer to the buffer to carry out the sum operation. | |
3201 | @param Length The size, in bytes, of Buffer. | |
3202 | ||
3203 | @return Sum The sum of Buffer with carry bits dropped during additions. | |
3204 | ||
3205 | **/ | |
3206 | UINT16 | |
3207 | EFIAPI | |
3208 | CalculateSum16 ( | |
3209 | IN CONST UINT16 *Buffer, | |
3210 | IN UINTN Length | |
3211 | ); | |
3212 | ||
d57e9bdc | 3213 | |
d958721a | 3214 | /** |
cb41bea7 | 3215 | Returns the two's complement checksum of all elements in a buffer of |
d958721a | 3216 | 16-bit values. |
3217 | ||
cb41bea7 | 3218 | This function first calculates the sum of the 16-bit values in the buffer |
3219 | specified by Buffer and Length. The carry bits in the result of addition | |
3220 | are dropped. Then, the two's complement of the sum is returned. If Length | |
d958721a | 3221 | is 0, then 0 is returned. |
cb41bea7 | 3222 | |
d958721a | 3223 | If Buffer is NULL, then ASSERT(). |
3224 | If Buffer is not aligned on a 16-bit boundary, then ASSERT(). | |
3225 | If Length is not aligned on a 16-bit boundary, then ASSERT(). | |
cb41bea7 | 3226 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). |
d958721a | 3227 | |
3228 | @param Buffer Pointer to the buffer to carry out the checksum operation. | |
3229 | @param Length The size, in bytes, of Buffer. | |
3230 | ||
3231 | @return Checksum The 2's complement checksum of Buffer. | |
3232 | ||
3233 | **/ | |
3234 | UINT16 | |
3235 | EFIAPI | |
3236 | CalculateCheckSum16 ( | |
3237 | IN CONST UINT16 *Buffer, | |
3238 | IN UINTN Length | |
3239 | ); | |
3240 | ||
d57e9bdc | 3241 | |
d958721a | 3242 | /** |
cb41bea7 | 3243 | Returns the sum of all elements in a buffer of 32-bit values. During |
d958721a | 3244 | calculation, the carry bits are dropped. |
3245 | ||
cb41bea7 | 3246 | This function calculates the sum of the 32-bit values in the buffer |
3247 | specified by Buffer and Length. The carry bits in result of addition are dropped. | |
3248 | The 32-bit result is returned. If Length is 0, then 0 is returned. | |
3249 | ||
d958721a | 3250 | If Buffer is NULL, then ASSERT(). |
3251 | If Buffer is not aligned on a 32-bit boundary, then ASSERT(). | |
3252 | If Length is not aligned on a 32-bit boundary, then ASSERT(). | |
3253 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). | |
3254 | ||
3255 | @param Buffer Pointer to the buffer to carry out the sum operation. | |
3256 | @param Length The size, in bytes, of Buffer. | |
3257 | ||
3258 | @return Sum The sum of Buffer with carry bits dropped during additions. | |
3259 | ||
3260 | **/ | |
3261 | UINT32 | |
3262 | EFIAPI | |
3263 | CalculateSum32 ( | |
3264 | IN CONST UINT32 *Buffer, | |
3265 | IN UINTN Length | |
3266 | ); | |
3267 | ||
d57e9bdc | 3268 | |
d958721a | 3269 | /** |
cb41bea7 | 3270 | Returns the two's complement checksum of all elements in a buffer of |
d958721a | 3271 | 32-bit values. |
3272 | ||
cb41bea7 | 3273 | This function first calculates the sum of the 32-bit values in the buffer |
3274 | specified by Buffer and Length. The carry bits in the result of addition | |
3275 | are dropped. Then, the two's complement of the sum is returned. If Length | |
d958721a | 3276 | is 0, then 0 is returned. |
cb41bea7 | 3277 | |
d958721a | 3278 | If Buffer is NULL, then ASSERT(). |
3279 | If Buffer is not aligned on a 32-bit boundary, then ASSERT(). | |
3280 | If Length is not aligned on a 32-bit boundary, then ASSERT(). | |
cb41bea7 | 3281 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). |
d958721a | 3282 | |
3283 | @param Buffer Pointer to the buffer to carry out the checksum operation. | |
3284 | @param Length The size, in bytes, of Buffer. | |
3285 | ||
3286 | @return Checksum The 2's complement checksum of Buffer. | |
3287 | ||
3288 | **/ | |
3289 | UINT32 | |
3290 | EFIAPI | |
3291 | CalculateCheckSum32 ( | |
3292 | IN CONST UINT32 *Buffer, | |
3293 | IN UINTN Length | |
3294 | ); | |
3295 | ||
d57e9bdc | 3296 | |
d958721a | 3297 | /** |
cb41bea7 | 3298 | Returns the sum of all elements in a buffer of 64-bit values. During |
d958721a | 3299 | calculation, the carry bits are dropped. |
3300 | ||
cb41bea7 | 3301 | This function calculates the sum of the 64-bit values in the buffer |
3302 | specified by Buffer and Length. The carry bits in result of addition are dropped. | |
3303 | The 64-bit result is returned. If Length is 0, then 0 is returned. | |
3304 | ||
d958721a | 3305 | If Buffer is NULL, then ASSERT(). |
3306 | If Buffer is not aligned on a 64-bit boundary, then ASSERT(). | |
3307 | If Length is not aligned on a 64-bit boundary, then ASSERT(). | |
3308 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). | |
3309 | ||
3310 | @param Buffer Pointer to the buffer to carry out the sum operation. | |
3311 | @param Length The size, in bytes, of Buffer. | |
3312 | ||
3313 | @return Sum The sum of Buffer with carry bits dropped during additions. | |
3314 | ||
3315 | **/ | |
3316 | UINT64 | |
3317 | EFIAPI | |
3318 | CalculateSum64 ( | |
3319 | IN CONST UINT64 *Buffer, | |
3320 | IN UINTN Length | |
3321 | ); | |
3322 | ||
d57e9bdc | 3323 | |
d958721a | 3324 | /** |
cb41bea7 | 3325 | Returns the two's complement checksum of all elements in a buffer of |
d958721a | 3326 | 64-bit values. |
3327 | ||
cb41bea7 | 3328 | This function first calculates the sum of the 64-bit values in the buffer |
3329 | specified by Buffer and Length. The carry bits in the result of addition | |
3330 | are dropped. Then, the two's complement of the sum is returned. If Length | |
d958721a | 3331 | is 0, then 0 is returned. |
cb41bea7 | 3332 | |
d958721a | 3333 | If Buffer is NULL, then ASSERT(). |
3334 | If Buffer is not aligned on a 64-bit boundary, then ASSERT(). | |
3335 | If Length is not aligned on a 64-bit boundary, then ASSERT(). | |
cb41bea7 | 3336 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). |
d958721a | 3337 | |
3338 | @param Buffer Pointer to the buffer to carry out the checksum operation. | |
3339 | @param Length The size, in bytes, of Buffer. | |
3340 | ||
3341 | @return Checksum The 2's complement checksum of Buffer. | |
3342 | ||
3343 | **/ | |
3344 | UINT64 | |
3345 | EFIAPI | |
3346 | CalculateCheckSum64 ( | |
3347 | IN CONST UINT64 *Buffer, | |
3348 | IN UINTN Length | |
3349 | ); | |
3350 | ||
d57e9bdc | 3351 | |
d958721a | 3352 | // |
3353 | // Base Library CPU Functions | |
3354 | // | |
3355 | typedef | |
3356 | VOID | |
3357 | (EFIAPI *SWITCH_STACK_ENTRY_POINT) ( | |
3358 | IN VOID *Context1, OPTIONAL | |
3359 | IN VOID *Context2 OPTIONAL | |
3360 | ); | |
3361 | ||
d57e9bdc | 3362 | |
d958721a | 3363 | /** |
3364 | Used to serialize load and store operations. | |
3365 | ||
3366 | All loads and stores that proceed calls to this function are guaranteed to be | |
3367 | globally visible when this function returns. | |
3368 | ||
3369 | **/ | |
3370 | VOID | |
3371 | EFIAPI | |
3372 | MemoryFence ( | |
3373 | VOID | |
3374 | ); | |
3375 | ||
d57e9bdc | 3376 | |
d958721a | 3377 | /** |
3378 | Saves the current CPU context that can be restored with a call to LongJump() | |
3379 | and returns 0. | |
3380 | ||
3381 | Saves the current CPU context in the buffer specified by JumpBuffer and | |
3382 | returns 0. The initial call to SetJump() must always return 0. Subsequent | |
3383 | calls to LongJump() cause a non-zero value to be returned by SetJump(). | |
3384 | ||
3385 | If JumpBuffer is NULL, then ASSERT(). | |
3386 | For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). | |
3387 | ||
3388 | @param JumpBuffer A pointer to CPU context buffer. | |
3389 | ||
3390 | @retval 0 Indicates a return from SetJump(). | |
3391 | ||
3392 | **/ | |
3393 | UINTN | |
3394 | EFIAPI | |
3395 | SetJump ( | |
3396 | OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer | |
3397 | ); | |
3398 | ||
d57e9bdc | 3399 | |
d958721a | 3400 | /** |
3401 | Restores the CPU context that was saved with SetJump(). | |
3402 | ||
3403 | Restores the CPU context from the buffer specified by JumpBuffer. This | |
3404 | function never returns to the caller. Instead is resumes execution based on | |
3405 | the state of JumpBuffer. | |
3406 | ||
3407 | If JumpBuffer is NULL, then ASSERT(). | |
3408 | For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). | |
3409 | If Value is 0, then ASSERT(). | |
3410 | ||
3411 | @param JumpBuffer A pointer to CPU context buffer. | |
3412 | @param Value The value to return when the SetJump() context is | |
3413 | restored and must be non-zero. | |
3414 | ||
3415 | **/ | |
3416 | VOID | |
3417 | EFIAPI | |
3418 | LongJump ( | |
3419 | IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, | |
3420 | IN UINTN Value | |
3421 | ); | |
3422 | ||
d57e9bdc | 3423 | |
d958721a | 3424 | /** |
3425 | Enables CPU interrupts. | |
3426 | ||
3427 | Enables CPU interrupts. | |
3428 | ||
3429 | **/ | |
3430 | VOID | |
3431 | EFIAPI | |
3432 | EnableInterrupts ( | |
3433 | VOID | |
3434 | ); | |
3435 | ||
d57e9bdc | 3436 | |
d958721a | 3437 | /** |
3438 | Disables CPU interrupts. | |
3439 | ||
3440 | Disables CPU interrupts. | |
3441 | ||
3442 | **/ | |
3443 | VOID | |
3444 | EFIAPI | |
3445 | DisableInterrupts ( | |
3446 | VOID | |
3447 | ); | |
3448 | ||
d57e9bdc | 3449 | |
d958721a | 3450 | /** |
3451 | Disables CPU interrupts and returns the interrupt state prior to the disable | |
3452 | operation. | |
3453 | ||
3454 | Disables CPU interrupts and returns the interrupt state prior to the disable | |
3455 | operation. | |
3456 | ||
3457 | @retval TRUE CPU interrupts were enabled on entry to this call. | |
3458 | @retval FALSE CPU interrupts were disabled on entry to this call. | |
3459 | ||
3460 | **/ | |
3461 | BOOLEAN | |
3462 | EFIAPI | |
3463 | SaveAndDisableInterrupts ( | |
3464 | VOID | |
3465 | ); | |
3466 | ||
d57e9bdc | 3467 | |
d958721a | 3468 | /** |
3469 | Enables CPU interrupts for the smallest window required to capture any | |
3470 | pending interrupts. | |
3471 | ||
3472 | Enables CPU interrupts for the smallest window required to capture any | |
3473 | pending interrupts. | |
3474 | ||
3475 | **/ | |
3476 | VOID | |
3477 | EFIAPI | |
3478 | EnableDisableInterrupts ( | |
3479 | VOID | |
3480 | ); | |
3481 | ||
d57e9bdc | 3482 | |
d958721a | 3483 | /** |
3484 | Retrieves the current CPU interrupt state. | |
3485 | ||
3486 | Retrieves the current CPU interrupt state. Returns TRUE is interrupts are | |
3487 | currently enabled. Otherwise returns FALSE. | |
3488 | ||
3489 | @retval TRUE CPU interrupts are enabled. | |
3490 | @retval FALSE CPU interrupts are disabled. | |
3491 | ||
3492 | **/ | |
3493 | BOOLEAN | |
3494 | EFIAPI | |
3495 | GetInterruptState ( | |
3496 | VOID | |
3497 | ); | |
3498 | ||
d57e9bdc | 3499 | |
d958721a | 3500 | /** |
3501 | Set the current CPU interrupt state. | |
3502 | ||
3503 | Sets the current CPU interrupt state to the state specified by | |
3504 | InterruptState. If InterruptState is TRUE, then interrupts are enabled. If | |
3505 | InterruptState is FALSE, then interrupts are disabled. InterruptState is | |
3506 | returned. | |
3507 | ||
3508 | @param InterruptState TRUE if interrupts should enabled. FALSE if | |
3509 | interrupts should be disabled. | |
3510 | ||
3511 | @return InterruptState | |
3512 | ||
3513 | **/ | |
3514 | BOOLEAN | |
3515 | EFIAPI | |
3516 | SetInterruptState ( | |
3517 | IN BOOLEAN InterruptState | |
3518 | ); | |
3519 | ||
d57e9bdc | 3520 | |
d958721a | 3521 | /** |
3522 | Places the CPU in a sleep state until an interrupt is received. | |
3523 | ||
3524 | Places the CPU in a sleep state until an interrupt is received. If interrupts | |
3525 | are disabled prior to calling this function, then the CPU will be placed in a | |
3526 | sleep state indefinitely. | |
3527 | ||
3528 | **/ | |
3529 | VOID | |
3530 | EFIAPI | |
3531 | CpuSleep ( | |
3532 | VOID | |
3533 | ); | |
3534 | ||
d57e9bdc | 3535 | |
d958721a | 3536 | /** |
3537 | Requests CPU to pause for a short period of time. | |
3538 | ||
3539 | Requests CPU to pause for a short period of time. Typically used in MP | |
3540 | systems to prevent memory starvation while waiting for a spin lock. | |
3541 | ||
3542 | **/ | |
3543 | VOID | |
3544 | EFIAPI | |
3545 | CpuPause ( | |
3546 | VOID | |
3547 | ); | |
3548 | ||
d57e9bdc | 3549 | |
d958721a | 3550 | /** |
3551 | Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU. | |
3552 | ||
3553 | Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU. | |
3554 | ||
3555 | **/ | |
3556 | VOID | |
3557 | EFIAPI | |
3558 | CpuFlushTlb ( | |
3559 | VOID | |
3560 | ); | |
3561 | ||
d57e9bdc | 3562 | |
d958721a | 3563 | /** |
3564 | Transfers control to a function starting with a new stack. | |
3565 | ||
cb41bea7 | 3566 | Transfers control to the function specified by EntryPoint using the |
3567 | new stack specified by NewStack and passing in the parameters specified | |
3568 | by Context1 and Context2. Context1 and Context2 are optional and may | |
3569 | be NULL. The function EntryPoint must never return. This function | |
3570 | supports a variable number of arguments following the NewStack parameter. | |
3571 | These additional arguments are ignored on IA-32, x64, and EBC. | |
3572 | IPF CPUs expect one additional parameter of type VOID * that specifies | |
3573 | the new backing store pointer. | |
d958721a | 3574 | |
3575 | If EntryPoint is NULL, then ASSERT(). | |
3576 | If NewStack is NULL, then ASSERT(). | |
3577 | ||
3578 | @param EntryPoint A pointer to function to call with the new stack. | |
3579 | @param Context1 A pointer to the context to pass into the EntryPoint | |
3580 | function. | |
3581 | @param Context2 A pointer to the context to pass into the EntryPoint | |
3582 | function. | |
3583 | @param NewStack A pointer to the new stack to use for the EntryPoint | |
3584 | function. | |
3585 | ||
3586 | **/ | |
3587 | VOID | |
3588 | EFIAPI | |
3589 | SwitchStack ( | |
3590 | IN SWITCH_STACK_ENTRY_POINT EntryPoint, | |
3591 | IN VOID *Context1, OPTIONAL | |
3592 | IN VOID *Context2, OPTIONAL | |
cb41bea7 | 3593 | IN VOID *NewStack, |
3594 | ... | |
d958721a | 3595 | ); |
3596 | ||
d57e9bdc | 3597 | |
d958721a | 3598 | /** |
3599 | Generates a breakpoint on the CPU. | |
3600 | ||
3601 | Generates a breakpoint on the CPU. The breakpoint must be implemented such | |
3602 | that code can resume normal execution after the breakpoint. | |
3603 | ||
3604 | **/ | |
3605 | VOID | |
3606 | EFIAPI | |
3607 | CpuBreakpoint ( | |
3608 | VOID | |
3609 | ); | |
3610 | ||
d57e9bdc | 3611 | |
d958721a | 3612 | /** |
3613 | Executes an infinite loop. | |
3614 | ||
3615 | Forces the CPU to execute an infinite loop. A debugger may be used to skip | |
3616 | past the loop and the code that follows the loop must execute properly. This | |
3617 | implies that the infinite loop must not cause the code that follow it to be | |
3618 | optimized away. | |
3619 | ||
3620 | **/ | |
3621 | VOID | |
3622 | EFIAPI | |
3623 | CpuDeadLoop ( | |
3624 | VOID | |
3625 | ); | |
3626 | ||
d57e9bdc | 3627 | |
d958721a | 3628 | // |
3629 | // IA32 and X64 Specific Functions | |
3630 | // | |
3631 | // | |
3632 | // Byte packed structure for 16-bit Real Mode EFLAGS | |
3633 | // | |
3634 | typedef union { | |
3635 | struct { | |
3636 | UINT32 CF:1; // Carry Flag | |
3637 | UINT32 Reserved_0:1; // Reserved | |
3638 | UINT32 PF:1; // Parity Flag | |
3639 | UINT32 Reserved_1:1; // Reserved | |
3640 | UINT32 AF:1; // Auxiliary Carry Flag | |
3641 | UINT32 Reserved_2:1; // Reserved | |
3642 | UINT32 ZF:1; // Zero Flag | |
3643 | UINT32 SF:1; // Sign Flag | |
3644 | UINT32 TF:1; // Trap Flag | |
3645 | UINT32 IF:1; // Interrupt Enable Flag | |
3646 | UINT32 DF:1; // Direction Flag | |
3647 | UINT32 OF:1; // Overflow Flag | |
3648 | UINT32 IOPL:2; // I/O Privilege Level | |
3649 | UINT32 NT:1; // Nested Task | |
3650 | UINT32 Reserved_3:1; // Reserved | |
3651 | } Bits; | |
3652 | UINT16 Uint16; | |
3653 | } IA32_FLAGS16; | |
3654 | ||
3655 | // | |
3656 | // Byte packed structure for EFLAGS/RFLAGS | |
3657 | // 32-bits on IA-32 | |
3658 | // 64-bits on X64. The upper 32-bits on X64 are reserved | |
3659 | // | |
3660 | typedef union { | |
3661 | struct { | |
3662 | UINT32 CF:1; // Carry Flag | |
3663 | UINT32 Reserved_0:1; // Reserved | |
3664 | UINT32 PF:1; // Parity Flag | |
3665 | UINT32 Reserved_1:1; // Reserved | |
3666 | UINT32 AF:1; // Auxiliary Carry Flag | |
3667 | UINT32 Reserved_2:1; // Reserved | |
3668 | UINT32 ZF:1; // Zero Flag | |
3669 | UINT32 SF:1; // Sign Flag | |
3670 | UINT32 TF:1; // Trap Flag | |
3671 | UINT32 IF:1; // Interrupt Enable Flag | |
3672 | UINT32 DF:1; // Direction Flag | |
3673 | UINT32 OF:1; // Overflow Flag | |
3674 | UINT32 IOPL:2; // I/O Privilege Level | |
3675 | UINT32 NT:1; // Nested Task | |
3676 | UINT32 Reserved_3:1; // Reserved | |
3677 | UINT32 RF:1; // Resume Flag | |
3678 | UINT32 VM:1; // Virtual 8086 Mode | |
3679 | UINT32 AC:1; // Alignment Check | |
3680 | UINT32 VIF:1; // Virtual Interrupt Flag | |
3681 | UINT32 VIP:1; // Virtual Interrupt Pending | |
3682 | UINT32 ID:1; // ID Flag | |
3683 | UINT32 Reserved_4:10; // Reserved | |
3684 | } Bits; | |
3685 | UINTN UintN; | |
3686 | } IA32_EFLAGS32; | |
3687 | ||
3688 | // | |
3689 | // Byte packed structure for Control Register 0 (CR0) | |
3690 | // 32-bits on IA-32 | |
3691 | // 64-bits on X64. The upper 32-bits on X64 are reserved | |
3692 | // | |
3693 | typedef union { | |
3694 | struct { | |
3695 | UINT32 PE:1; // Protection Enable | |
3696 | UINT32 MP:1; // Monitor Coprocessor | |
3697 | UINT32 EM:1; // Emulation | |
3698 | UINT32 TS:1; // Task Switched | |
3699 | UINT32 ET:1; // Extension Type | |
3700 | UINT32 NE:1; // Numeric Error | |
3701 | UINT32 Reserved_0:10; // Reserved | |
3702 | UINT32 WP:1; // Write Protect | |
3703 | UINT32 Reserved_1:1; // Reserved | |
3704 | UINT32 AM:1; // Alignment Mask | |
3705 | UINT32 Reserved_2:10; // Reserved | |
3706 | UINT32 NW:1; // Mot Write-through | |
3707 | UINT32 CD:1; // Cache Disable | |
3708 | UINT32 PG:1; // Paging | |
3709 | } Bits; | |
3710 | UINTN UintN; | |
3711 | } IA32_CR0; | |
3712 | ||
3713 | // | |
3714 | // Byte packed structure for Control Register 4 (CR4) | |
3715 | // 32-bits on IA-32 | |
3716 | // 64-bits on X64. The upper 32-bits on X64 are reserved | |
3717 | // | |
3718 | typedef union { | |
3719 | struct { | |
3720 | UINT32 VME:1; // Virtual-8086 Mode Extensions | |
3721 | UINT32 PVI:1; // Protected-Mode Virtual Interrupts | |
3722 | UINT32 TSD:1; // Time Stamp Disable | |
3723 | UINT32 DE:1; // Debugging Extensions | |
3724 | UINT32 PSE:1; // Page Size Extensions | |
3725 | UINT32 PAE:1; // Physical Address Extension | |
3726 | UINT32 MCE:1; // Machine Check Enable | |
3727 | UINT32 PGE:1; // Page Global Enable | |
3728 | UINT32 PCE:1; // Performance Monitoring Counter | |
3729 | // Enable | |
3730 | UINT32 OSFXSR:1; // Operating System Support for | |
3731 | // FXSAVE and FXRSTOR instructions | |
3732 | UINT32 OSXMMEXCPT:1; // Operating System Support for | |
3733 | // Unmasked SIMD Floating Point | |
3734 | // Exceptions | |
3735 | UINT32 Reserved_0:2; // Reserved | |
3736 | UINT32 VMXE:1; // VMX Enable | |
3737 | UINT32 Reserved_1:18; // Reseved | |
3738 | } Bits; | |
3739 | UINTN UintN; | |
3740 | } IA32_CR4; | |
3741 | ||
3742 | // | |
3743 | // Byte packed structure for an IDTR, GDTR, LDTR descriptor | |
3744 | /// @bug How to make this structure byte-packed in a compiler independent way? | |
3745 | // | |
3746 | #pragma pack (1) | |
3747 | typedef struct { | |
3748 | UINT16 Limit; | |
3749 | UINTN Base; | |
3750 | } IA32_DESCRIPTOR; | |
3751 | #pragma pack () | |
3752 | ||
3753 | #define IA32_IDT_GATE_TYPE_TASK 0x85 | |
3754 | #define IA32_IDT_GATE_TYPE_INTERRUPT_16 0x86 | |
3755 | #define IA32_IDT_GATE_TYPE_TRAP_16 0x87 | |
3756 | #define IA32_IDT_GATE_TYPE_INTERRUPT_32 0x8E | |
3757 | #define IA32_IDT_GATE_TYPE_TRAP_32 0x8F | |
3758 | ||
3759 | // | |
3760 | // Byte packed structure for an Interrupt Gate Descriptor | |
3761 | // | |
3762 | typedef union { | |
3763 | struct { | |
3764 | UINT32 OffsetLow:16; // Offset bits 15..0 | |
3765 | UINT32 Selector:16; // Selector | |
3766 | UINT32 Reserved_0:8; // Reserved | |
3767 | UINT32 GateType:8; // Gate Type. See #defines above | |
3768 | UINT32 OffsetHigh:16; // Offset bits 31..16 | |
3769 | } Bits; | |
3770 | UINT64 Uint64; | |
3771 | } IA32_IDT_GATE_DESCRIPTOR; | |
3772 | ||
3773 | // | |
3774 | // Byte packed structure for an FP/SSE/SSE2 context | |
3775 | // | |
3776 | typedef struct { | |
3777 | UINT8 Buffer[512]; | |
3778 | } IA32_FX_BUFFER; | |
3779 | ||
3780 | // | |
3781 | // Structures for the 16-bit real mode thunks | |
3782 | // | |
3783 | typedef struct { | |
3784 | UINT32 Reserved1; | |
3785 | UINT32 Reserved2; | |
3786 | UINT32 Reserved3; | |
3787 | UINT32 Reserved4; | |
3788 | UINT8 BL; | |
3789 | UINT8 BH; | |
3790 | UINT16 Reserved5; | |
3791 | UINT8 DL; | |
3792 | UINT8 DH; | |
3793 | UINT16 Reserved6; | |
3794 | UINT8 CL; | |
3795 | UINT8 CH; | |
3796 | UINT16 Reserved7; | |
3797 | UINT8 AL; | |
3798 | UINT8 AH; | |
3799 | UINT16 Reserved8; | |
3800 | } IA32_BYTE_REGS; | |
3801 | ||
3802 | typedef struct { | |
3803 | UINT16 DI; | |
3804 | UINT16 Reserved1; | |
3805 | UINT16 SI; | |
3806 | UINT16 Reserved2; | |
3807 | UINT16 BP; | |
3808 | UINT16 Reserved3; | |
3809 | UINT16 SP; | |
3810 | UINT16 Reserved4; | |
3811 | UINT16 BX; | |
3812 | UINT16 Reserved5; | |
3813 | UINT16 DX; | |
3814 | UINT16 Reserved6; | |
3815 | UINT16 CX; | |
3816 | UINT16 Reserved7; | |
3817 | UINT16 AX; | |
3818 | UINT16 Reserved8; | |
3819 | } IA32_WORD_REGS; | |
3820 | ||
3821 | typedef struct { | |
3822 | UINT32 EDI; | |
3823 | UINT32 ESI; | |
3824 | UINT32 EBP; | |
3825 | UINT32 ESP; | |
3826 | UINT32 EBX; | |
3827 | UINT32 EDX; | |
3828 | UINT32 ECX; | |
3829 | UINT32 EAX; | |
3830 | UINT16 DS; | |
3831 | UINT16 ES; | |
3832 | UINT16 FS; | |
3833 | UINT16 GS; | |
3834 | IA32_EFLAGS32 EFLAGS; | |
3835 | UINT32 Eip; | |
3836 | UINT16 CS; | |
3837 | UINT16 SS; | |
3838 | } IA32_DWORD_REGS; | |
3839 | ||
3840 | typedef union { | |
3841 | IA32_DWORD_REGS E; | |
3842 | IA32_WORD_REGS X; | |
3843 | IA32_BYTE_REGS H; | |
3844 | } IA32_REGISTER_SET; | |
3845 | ||
3846 | // | |
3847 | // Byte packed structure for an 16-bit real mode thunks | |
3848 | // | |
3849 | typedef struct { | |
3850 | IA32_REGISTER_SET *RealModeState; | |
3851 | VOID *RealModeBuffer; | |
3852 | UINT32 RealModeBufferSize; | |
3853 | UINT32 ThunkAttributes; | |
3854 | } THUNK_CONTEXT; | |
3855 | ||
3856 | #define THUNK_ATTRIBUTE_BIG_REAL_MODE 0x00000001 | |
3857 | #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 0x00000002 | |
3858 | #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL 0x00000004 | |
3859 | ||
3860 | /** | |
3861 | Retrieves CPUID information. | |
3862 | ||
3863 | Executes the CPUID instruction with EAX set to the value specified by Index. | |
3864 | This function always returns Index. | |
3865 | If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. | |
3866 | If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. | |
3867 | If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. | |
3868 | If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. | |
3869 | This function is only available on IA-32 and X64. | |
3870 | ||
3871 | @param Index The 32-bit value to load into EAX prior to invoking the CPUID | |
3872 | instruction. | |
3873 | @param Eax Pointer to the 32-bit EAX value returned by the CPUID | |
3874 | instruction. This is an optional parameter that may be NULL. | |
3875 | @param Ebx Pointer to the 32-bit EBX value returned by the CPUID | |
3876 | instruction. This is an optional parameter that may be NULL. | |
3877 | @param Ecx Pointer to the 32-bit ECX value returned by the CPUID | |
3878 | instruction. This is an optional parameter that may be NULL. | |
3879 | @param Edx Pointer to the 32-bit EDX value returned by the CPUID | |
3880 | instruction. This is an optional parameter that may be NULL. | |
3881 | ||
3882 | @return Index | |
3883 | ||
3884 | **/ | |
3885 | UINT32 | |
3886 | EFIAPI | |
3887 | AsmCpuid ( | |
3888 | IN UINT32 Index, | |
3889 | OUT UINT32 *Eax, OPTIONAL | |
3890 | OUT UINT32 *Ebx, OPTIONAL | |
3891 | OUT UINT32 *Ecx, OPTIONAL | |
3892 | OUT UINT32 *Edx OPTIONAL | |
3893 | ); | |
3894 | ||
d57e9bdc | 3895 | |
d958721a | 3896 | /** |
3897 | Retrieves CPUID information using an extended leaf identifier. | |
3898 | ||
3899 | Executes the CPUID instruction with EAX set to the value specified by Index | |
3900 | and ECX set to the value specified by SubIndex. This function always returns | |
3901 | Index. This function is only available on IA-32 and x64. | |
3902 | ||
3903 | If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. | |
3904 | If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. | |
3905 | If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. | |
3906 | If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. | |
3907 | ||
3908 | @param Index The 32-bit value to load into EAX prior to invoking the | |
3909 | CPUID instruction. | |
3910 | @param SubIndex The 32-bit value to load into ECX prior to invoking the | |
3911 | CPUID instruction. | |
3912 | @param Eax Pointer to the 32-bit EAX value returned by the CPUID | |
3913 | instruction. This is an optional parameter that may be | |
3914 | NULL. | |
3915 | @param Ebx Pointer to the 32-bit EBX value returned by the CPUID | |
3916 | instruction. This is an optional parameter that may be | |
3917 | NULL. | |
3918 | @param Ecx Pointer to the 32-bit ECX value returned by the CPUID | |
3919 | instruction. This is an optional parameter that may be | |
3920 | NULL. | |
3921 | @param Edx Pointer to the 32-bit EDX value returned by the CPUID | |
3922 | instruction. This is an optional parameter that may be | |
3923 | NULL. | |
3924 | ||
3925 | @return Index | |
3926 | ||
3927 | **/ | |
3928 | UINT32 | |
3929 | EFIAPI | |
3930 | AsmCpuidEx ( | |
3931 | IN UINT32 Index, | |
3932 | IN UINT32 SubIndex, | |
3933 | OUT UINT32 *Eax, OPTIONAL | |
3934 | OUT UINT32 *Ebx, OPTIONAL | |
3935 | OUT UINT32 *Ecx, OPTIONAL | |
3936 | OUT UINT32 *Edx OPTIONAL | |
3937 | ); | |
3938 | ||
d57e9bdc | 3939 | |
d958721a | 3940 | /** |
3941 | Returns the lower 32-bits of a Machine Specific Register(MSR). | |
3942 | ||
3943 | Reads and returns the lower 32-bits of the MSR specified by Index. | |
3944 | No parameter checking is performed on Index, and some Index values may cause | |
3945 | CPU exceptions. The caller must either guarantee that Index is valid, or the | |
3946 | caller must set up exception handlers to catch the exceptions. This function | |
3947 | is only available on IA-32 and X64. | |
3948 | ||
3949 | @param Index The 32-bit MSR index to read. | |
3950 | ||
3951 | @return The lower 32 bits of the MSR identified by Index. | |
3952 | ||
3953 | **/ | |
3954 | UINT32 | |
3955 | EFIAPI | |
3956 | AsmReadMsr32 ( | |
3957 | IN UINT32 Index | |
3958 | ); | |
3959 | ||
d57e9bdc | 3960 | |
d958721a | 3961 | /** |
3962 | Zero-extend a 32-bit value and writes it to a Machine Specific Register(MSR). | |
3963 | ||
3964 | Writes the 32-bit value specified by Value to the MSR specified by Index. The | |
3965 | upper 32-bits of the MSR write are set to zero. The 32-bit value written to | |
3966 | the MSR is returned. No parameter checking is performed on Index or Value, | |
3967 | and some of these may cause CPU exceptions. The caller must either guarantee | |
3968 | that Index and Value are valid, or the caller must establish proper exception | |
3969 | handlers. This function is only available on IA-32 and X64. | |
3970 | ||
3971 | @param Index The 32-bit MSR index to write. | |
3972 | @param Value The 32-bit value to write to the MSR. | |
3973 | ||
3974 | @return Value | |
3975 | ||
3976 | **/ | |
3977 | UINT32 | |
3978 | EFIAPI | |
3979 | AsmWriteMsr32 ( | |
3980 | IN UINT32 Index, | |
3981 | IN UINT32 Value | |
3982 | ); | |
3983 | ||
d57e9bdc | 3984 | |
d958721a | 3985 | /** |
3986 | Reads a 64-bit MSR, performs a bitwise inclusive OR on the lower 32-bits, and | |
3987 | writes the result back to the 64-bit MSR. | |
3988 | ||
3989 | Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR | |
3990 | between the lower 32-bits of the read result and the value specified by | |
3991 | OrData, and writes the result to the 64-bit MSR specified by Index. The lower | |
3992 | 32-bits of the value written to the MSR is returned. No parameter checking is | |
3993 | performed on Index or OrData, and some of these may cause CPU exceptions. The | |
3994 | caller must either guarantee that Index and OrData are valid, or the caller | |
3995 | must establish proper exception handlers. This function is only available on | |
3996 | IA-32 and X64. | |
3997 | ||
3998 | @param Index The 32-bit MSR index to write. | |
3999 | @param OrData The value to OR with the read value from the MSR. | |
4000 | ||
4001 | @return The lower 32-bit value written to the MSR. | |
4002 | ||
4003 | **/ | |
4004 | UINT32 | |
4005 | EFIAPI | |
4006 | AsmMsrOr32 ( | |
4007 | IN UINT32 Index, | |
4008 | IN UINT32 OrData | |
4009 | ); | |
4010 | ||
d57e9bdc | 4011 | |
d958721a | 4012 | /** |
4013 | Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes | |
4014 | the result back to the 64-bit MSR. | |
4015 | ||
4016 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between the | |
4017 | lower 32-bits of the read result and the value specified by AndData, and | |
4018 | writes the result to the 64-bit MSR specified by Index. The lower 32-bits of | |
4019 | the value written to the MSR is returned. No parameter checking is performed | |
4020 | on Index or AndData, and some of these may cause CPU exceptions. The caller | |
4021 | must either guarantee that Index and AndData are valid, or the caller must | |
4022 | establish proper exception handlers. This function is only available on IA-32 | |
4023 | and X64. | |
4024 | ||
4025 | @param Index The 32-bit MSR index to write. | |
4026 | @param AndData The value to AND with the read value from the MSR. | |
4027 | ||
4028 | @return The lower 32-bit value written to the MSR. | |
4029 | ||
4030 | **/ | |
4031 | UINT32 | |
4032 | EFIAPI | |
4033 | AsmMsrAnd32 ( | |
4034 | IN UINT32 Index, | |
4035 | IN UINT32 AndData | |
4036 | ); | |
4037 | ||
d57e9bdc | 4038 | |
d958721a | 4039 | /** |
4040 | Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive OR | |
4041 | on the lower 32-bits, and writes the result back to the 64-bit MSR. | |
4042 | ||
4043 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between the | |
4044 | lower 32-bits of the read result and the value specified by AndData | |
4045 | preserving the upper 32-bits, performs a bitwise inclusive OR between the | |
4046 | result of the AND operation and the value specified by OrData, and writes the | |
4047 | result to the 64-bit MSR specified by Address. The lower 32-bits of the value | |
4048 | written to the MSR is returned. No parameter checking is performed on Index, | |
4049 | AndData, or OrData, and some of these may cause CPU exceptions. The caller | |
4050 | must either guarantee that Index, AndData, and OrData are valid, or the | |
4051 | caller must establish proper exception handlers. This function is only | |
4052 | available on IA-32 and X64. | |
4053 | ||
4054 | @param Index The 32-bit MSR index to write. | |
4055 | @param AndData The value to AND with the read value from the MSR. | |
4056 | @param OrData The value to OR with the result of the AND operation. | |
4057 | ||
4058 | @return The lower 32-bit value written to the MSR. | |
4059 | ||
4060 | **/ | |
4061 | UINT32 | |
4062 | EFIAPI | |
4063 | AsmMsrAndThenOr32 ( | |
4064 | IN UINT32 Index, | |
4065 | IN UINT32 AndData, | |
4066 | IN UINT32 OrData | |
4067 | ); | |
4068 | ||
d57e9bdc | 4069 | |
d958721a | 4070 | /** |
4071 | Reads a bit field of an MSR. | |
4072 | ||
4073 | Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is | |
4074 | specified by the StartBit and the EndBit. The value of the bit field is | |
4075 | returned. The caller must either guarantee that Index is valid, or the caller | |
4076 | must set up exception handlers to catch the exceptions. This function is only | |
4077 | available on IA-32 and X64. | |
4078 | ||
4079 | If StartBit is greater than 31, then ASSERT(). | |
4080 | If EndBit is greater than 31, then ASSERT(). | |
4081 | If EndBit is less than StartBit, then ASSERT(). | |
4082 | ||
4083 | @param Index The 32-bit MSR index to read. | |
4084 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4085 | Range 0..31. | |
4086 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4087 | Range 0..31. | |
4088 | ||
4089 | @return The bit field read from the MSR. | |
4090 | ||
4091 | **/ | |
4092 | UINT32 | |
4093 | EFIAPI | |
4094 | AsmMsrBitFieldRead32 ( | |
4095 | IN UINT32 Index, | |
4096 | IN UINTN StartBit, | |
4097 | IN UINTN EndBit | |
4098 | ); | |
4099 | ||
d57e9bdc | 4100 | |
d958721a | 4101 | /** |
4102 | Writes a bit field to an MSR. | |
4103 | ||
4104 | Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit | |
4105 | field is specified by the StartBit and the EndBit. All other bits in the | |
4106 | destination MSR are preserved. The lower 32-bits of the MSR written is | |
4107 | returned. Extra left bits in Value are stripped. The caller must either | |
4108 | guarantee that Index and the data written is valid, or the caller must set up | |
4109 | exception handlers to catch the exceptions. This function is only available | |
4110 | on IA-32 and X64. | |
4111 | ||
4112 | If StartBit is greater than 31, then ASSERT(). | |
4113 | If EndBit is greater than 31, then ASSERT(). | |
4114 | If EndBit is less than StartBit, then ASSERT(). | |
4115 | ||
4116 | @param Index The 32-bit MSR index to write. | |
4117 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4118 | Range 0..31. | |
4119 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4120 | Range 0..31. | |
4121 | @param Value New value of the bit field. | |
4122 | ||
4123 | @return The lower 32-bit of the value written to the MSR. | |
4124 | ||
4125 | **/ | |
4126 | UINT32 | |
4127 | EFIAPI | |
4128 | AsmMsrBitFieldWrite32 ( | |
4129 | IN UINT32 Index, | |
4130 | IN UINTN StartBit, | |
4131 | IN UINTN EndBit, | |
4132 | IN UINT32 Value | |
4133 | ); | |
4134 | ||
d57e9bdc | 4135 | |
d958721a | 4136 | /** |
4137 | Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the | |
4138 | result back to the bit field in the 64-bit MSR. | |
4139 | ||
4140 | Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR | |
4141 | between the read result and the value specified by OrData, and writes the | |
4142 | result to the 64-bit MSR specified by Index. The lower 32-bits of the value | |
4143 | written to the MSR are returned. Extra left bits in OrData are stripped. The | |
4144 | caller must either guarantee that Index and the data written is valid, or | |
4145 | the caller must set up exception handlers to catch the exceptions. This | |
4146 | function is only available on IA-32 and X64. | |
4147 | ||
4148 | If StartBit is greater than 31, then ASSERT(). | |
4149 | If EndBit is greater than 31, then ASSERT(). | |
4150 | If EndBit is less than StartBit, then ASSERT(). | |
4151 | ||
4152 | @param Index The 32-bit MSR index to write. | |
4153 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4154 | Range 0..31. | |
4155 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4156 | Range 0..31. | |
4157 | @param OrData The value to OR with the read value from the MSR. | |
4158 | ||
4159 | @return The lower 32-bit of the value written to the MSR. | |
4160 | ||
4161 | **/ | |
4162 | UINT32 | |
4163 | EFIAPI | |
4164 | AsmMsrBitFieldOr32 ( | |
4165 | IN UINT32 Index, | |
4166 | IN UINTN StartBit, | |
4167 | IN UINTN EndBit, | |
4168 | IN UINT32 OrData | |
4169 | ); | |
4170 | ||
d57e9bdc | 4171 | |
d958721a | 4172 | /** |
4173 | Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the | |
4174 | result back to the bit field in the 64-bit MSR. | |
4175 | ||
4176 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between the | |
4177 | read result and the value specified by AndData, and writes the result to the | |
4178 | 64-bit MSR specified by Index. The lower 32-bits of the value written to the | |
4179 | MSR are returned. Extra left bits in AndData are stripped. The caller must | |
4180 | either guarantee that Index and the data written is valid, or the caller must | |
4181 | set up exception handlers to catch the exceptions. This function is only | |
4182 | available on IA-32 and X64. | |
4183 | ||
4184 | If StartBit is greater than 31, then ASSERT(). | |
4185 | If EndBit is greater than 31, then ASSERT(). | |
4186 | If EndBit is less than StartBit, then ASSERT(). | |
4187 | ||
4188 | @param Index The 32-bit MSR index to write. | |
4189 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4190 | Range 0..31. | |
4191 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4192 | Range 0..31. | |
4193 | @param AndData The value to AND with the read value from the MSR. | |
4194 | ||
4195 | @return The lower 32-bit of the value written to the MSR. | |
4196 | ||
4197 | **/ | |
4198 | UINT32 | |
4199 | EFIAPI | |
4200 | AsmMsrBitFieldAnd32 ( | |
4201 | IN UINT32 Index, | |
4202 | IN UINTN StartBit, | |
4203 | IN UINTN EndBit, | |
4204 | IN UINT32 AndData | |
4205 | ); | |
4206 | ||
d57e9bdc | 4207 | |
d958721a | 4208 | /** |
4209 | Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a | |
4210 | bitwise inclusive OR, and writes the result back to the bit field in the | |
4211 | 64-bit MSR. | |
4212 | ||
4213 | Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a | |
4214 | bitwise inclusive OR between the read result and the value specified by | |
4215 | AndData, and writes the result to the 64-bit MSR specified by Index. The | |
4216 | lower 32-bits of the value written to the MSR are returned. Extra left bits | |
4217 | in both AndData and OrData are stripped. The caller must either guarantee | |
4218 | that Index and the data written is valid, or the caller must set up exception | |
4219 | handlers to catch the exceptions. This function is only available on IA-32 | |
4220 | and X64. | |
4221 | ||
4222 | If StartBit is greater than 31, then ASSERT(). | |
4223 | If EndBit is greater than 31, then ASSERT(). | |
4224 | If EndBit is less than StartBit, then ASSERT(). | |
4225 | ||
4226 | @param Index The 32-bit MSR index to write. | |
4227 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4228 | Range 0..31. | |
4229 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4230 | Range 0..31. | |
4231 | @param AndData The value to AND with the read value from the MSR. | |
4232 | @param OrData The value to OR with the result of the AND operation. | |
4233 | ||
4234 | @return The lower 32-bit of the value written to the MSR. | |
4235 | ||
4236 | **/ | |
4237 | UINT32 | |
4238 | EFIAPI | |
4239 | AsmMsrBitFieldAndThenOr32 ( | |
4240 | IN UINT32 Index, | |
4241 | IN UINTN StartBit, | |
4242 | IN UINTN EndBit, | |
4243 | IN UINT32 AndData, | |
4244 | IN UINT32 OrData | |
4245 | ); | |
4246 | ||
d57e9bdc | 4247 | |
d958721a | 4248 | /** |
4249 | Returns a 64-bit Machine Specific Register(MSR). | |
4250 | ||
4251 | Reads and returns the 64-bit MSR specified by Index. No parameter checking is | |
4252 | performed on Index, and some Index values may cause CPU exceptions. The | |
4253 | caller must either guarantee that Index is valid, or the caller must set up | |
4254 | exception handlers to catch the exceptions. This function is only available | |
4255 | on IA-32 and X64. | |
4256 | ||
4257 | @param Index The 32-bit MSR index to read. | |
4258 | ||
4259 | @return The value of the MSR identified by Index. | |
4260 | ||
4261 | **/ | |
4262 | UINT64 | |
4263 | EFIAPI | |
4264 | AsmReadMsr64 ( | |
4265 | IN UINT32 Index | |
4266 | ); | |
4267 | ||
d57e9bdc | 4268 | |
d958721a | 4269 | /** |
4270 | Writes a 64-bit value to a Machine Specific Register(MSR), and returns the | |
4271 | value. | |
4272 | ||
4273 | Writes the 64-bit value specified by Value to the MSR specified by Index. The | |
4274 | 64-bit value written to the MSR is returned. No parameter checking is | |
4275 | performed on Index or Value, and some of these may cause CPU exceptions. The | |
4276 | caller must either guarantee that Index and Value are valid, or the caller | |
4277 | must establish proper exception handlers. This function is only available on | |
4278 | IA-32 and X64. | |
4279 | ||
4280 | @param Index The 32-bit MSR index to write. | |
4281 | @param Value The 64-bit value to write to the MSR. | |
4282 | ||
4283 | @return Value | |
4284 | ||
4285 | **/ | |
4286 | UINT64 | |
4287 | EFIAPI | |
4288 | AsmWriteMsr64 ( | |
4289 | IN UINT32 Index, | |
4290 | IN UINT64 Value | |
4291 | ); | |
4292 | ||
d57e9bdc | 4293 | |
d958721a | 4294 | /** |
4295 | Reads a 64-bit MSR, performs a bitwise inclusive OR, and writes the result | |
4296 | back to the 64-bit MSR. | |
4297 | ||
4298 | Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR | |
4299 | between the read result and the value specified by OrData, and writes the | |
4300 | result to the 64-bit MSR specified by Index. The value written to the MSR is | |
4301 | returned. No parameter checking is performed on Index or OrData, and some of | |
4302 | these may cause CPU exceptions. The caller must either guarantee that Index | |
4303 | and OrData are valid, or the caller must establish proper exception handlers. | |
4304 | This function is only available on IA-32 and X64. | |
4305 | ||
4306 | @param Index The 32-bit MSR index to write. | |
4307 | @param OrData The value to OR with the read value from the MSR. | |
4308 | ||
4309 | @return The value written back to the MSR. | |
4310 | ||
4311 | **/ | |
4312 | UINT64 | |
4313 | EFIAPI | |
4314 | AsmMsrOr64 ( | |
4315 | IN UINT32 Index, | |
4316 | IN UINT64 OrData | |
4317 | ); | |
4318 | ||
d57e9bdc | 4319 | |
d958721a | 4320 | /** |
4321 | Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to the | |
4322 | 64-bit MSR. | |
4323 | ||
4324 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between the | |
4325 | read result and the value specified by OrData, and writes the result to the | |
4326 | 64-bit MSR specified by Index. The value written to the MSR is returned. No | |
4327 | parameter checking is performed on Index or OrData, and some of these may | |
4328 | cause CPU exceptions. The caller must either guarantee that Index and OrData | |
4329 | are valid, or the caller must establish proper exception handlers. This | |
4330 | function is only available on IA-32 and X64. | |
4331 | ||
4332 | @param Index The 32-bit MSR index to write. | |
4333 | @param AndData The value to AND with the read value from the MSR. | |
4334 | ||
4335 | @return The value written back to the MSR. | |
4336 | ||
4337 | **/ | |
4338 | UINT64 | |
4339 | EFIAPI | |
4340 | AsmMsrAnd64 ( | |
4341 | IN UINT32 Index, | |
4342 | IN UINT64 AndData | |
4343 | ); | |
4344 | ||
d57e9bdc | 4345 | |
d958721a | 4346 | /** |
4347 | Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive | |
4348 | OR, and writes the result back to the 64-bit MSR. | |
4349 | ||
4350 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between read | |
4351 | result and the value specified by AndData, performs a bitwise inclusive OR | |
4352 | between the result of the AND operation and the value specified by OrData, | |
4353 | and writes the result to the 64-bit MSR specified by Index. The value written | |
4354 | to the MSR is returned. No parameter checking is performed on Index, AndData, | |
4355 | or OrData, and some of these may cause CPU exceptions. The caller must either | |
4356 | guarantee that Index, AndData, and OrData are valid, or the caller must | |
4357 | establish proper exception handlers. This function is only available on IA-32 | |
4358 | and X64. | |
4359 | ||
4360 | @param Index The 32-bit MSR index to write. | |
4361 | @param AndData The value to AND with the read value from the MSR. | |
4362 | @param OrData The value to OR with the result of the AND operation. | |
4363 | ||
4364 | @return The value written back to the MSR. | |
4365 | ||
4366 | **/ | |
4367 | UINT64 | |
4368 | EFIAPI | |
4369 | AsmMsrAndThenOr64 ( | |
4370 | IN UINT32 Index, | |
4371 | IN UINT64 AndData, | |
4372 | IN UINT64 OrData | |
4373 | ); | |
4374 | ||
d57e9bdc | 4375 | |
d958721a | 4376 | /** |
4377 | Reads a bit field of an MSR. | |
4378 | ||
4379 | Reads the bit field in the 64-bit MSR. The bit field is specified by the | |
4380 | StartBit and the EndBit. The value of the bit field is returned. The caller | |
4381 | must either guarantee that Index is valid, or the caller must set up | |
4382 | exception handlers to catch the exceptions. This function is only available | |
4383 | on IA-32 and X64. | |
4384 | ||
4385 | If StartBit is greater than 63, then ASSERT(). | |
4386 | If EndBit is greater than 63, then ASSERT(). | |
4387 | If EndBit is less than StartBit, then ASSERT(). | |
4388 | ||
4389 | @param Index The 32-bit MSR index to read. | |
4390 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4391 | Range 0..63. | |
4392 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4393 | Range 0..63. | |
4394 | ||
4395 | @return The value read from the MSR. | |
4396 | ||
4397 | **/ | |
4398 | UINT64 | |
4399 | EFIAPI | |
4400 | AsmMsrBitFieldRead64 ( | |
4401 | IN UINT32 Index, | |
4402 | IN UINTN StartBit, | |
4403 | IN UINTN EndBit | |
4404 | ); | |
4405 | ||
d57e9bdc | 4406 | |
d958721a | 4407 | /** |
4408 | Writes a bit field to an MSR. | |
4409 | ||
4410 | Writes Value to a bit field in a 64-bit MSR. The bit field is specified by | |
4411 | the StartBit and the EndBit. All other bits in the destination MSR are | |
4412 | preserved. The MSR written is returned. Extra left bits in Value are | |
4413 | stripped. The caller must either guarantee that Index and the data written is | |
4414 | valid, or the caller must set up exception handlers to catch the exceptions. | |
4415 | This function is only available on IA-32 and X64. | |
4416 | ||
4417 | If StartBit is greater than 63, then ASSERT(). | |
4418 | If EndBit is greater than 63, then ASSERT(). | |
4419 | If EndBit is less than StartBit, then ASSERT(). | |
4420 | ||
4421 | @param Index The 32-bit MSR index to write. | |
4422 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4423 | Range 0..63. | |
4424 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4425 | Range 0..63. | |
4426 | @param Value New value of the bit field. | |
4427 | ||
4428 | @return The value written back to the MSR. | |
4429 | ||
4430 | **/ | |
4431 | UINT64 | |
4432 | EFIAPI | |
4433 | AsmMsrBitFieldWrite64 ( | |
4434 | IN UINT32 Index, | |
4435 | IN UINTN StartBit, | |
4436 | IN UINTN EndBit, | |
4437 | IN UINT64 Value | |
4438 | ); | |
4439 | ||
d57e9bdc | 4440 | |
d958721a | 4441 | /** |
4442 | Reads a bit field in a 64-bit MSR, performs a bitwise inclusive OR, and | |
4443 | writes the result back to the bit field in the 64-bit MSR. | |
4444 | ||
4445 | Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR | |
4446 | between the read result and the value specified by OrData, and writes the | |
4447 | result to the 64-bit MSR specified by Index. The value written to the MSR is | |
4448 | returned. Extra left bits in OrData are stripped. The caller must either | |
4449 | guarantee that Index and the data written is valid, or the caller must set up | |
4450 | exception handlers to catch the exceptions. This function is only available | |
4451 | on IA-32 and X64. | |
4452 | ||
4453 | If StartBit is greater than 63, then ASSERT(). | |
4454 | If EndBit is greater than 63, then ASSERT(). | |
4455 | If EndBit is less than StartBit, then ASSERT(). | |
4456 | ||
4457 | @param Index The 32-bit MSR index to write. | |
4458 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4459 | Range 0..63. | |
4460 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4461 | Range 0..63. | |
4462 | @param OrData The value to OR with the read value from the bit field. | |
4463 | ||
4464 | @return The value written back to the MSR. | |
4465 | ||
4466 | **/ | |
4467 | UINT64 | |
4468 | EFIAPI | |
4469 | AsmMsrBitFieldOr64 ( | |
4470 | IN UINT32 Index, | |
4471 | IN UINTN StartBit, | |
4472 | IN UINTN EndBit, | |
4473 | IN UINT64 OrData | |
4474 | ); | |
4475 | ||
d57e9bdc | 4476 | |
d958721a | 4477 | /** |
4478 | Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the | |
4479 | result back to the bit field in the 64-bit MSR. | |
4480 | ||
4481 | Reads the 64-bit MSR specified by Index, performs a bitwise AND between the | |
4482 | read result and the value specified by AndData, and writes the result to the | |
4483 | 64-bit MSR specified by Index. The value written to the MSR is returned. | |
4484 | Extra left bits in AndData are stripped. The caller must either guarantee | |
4485 | that Index and the data written is valid, or the caller must set up exception | |
4486 | handlers to catch the exceptions. This function is only available on IA-32 | |
4487 | and X64. | |
4488 | ||
4489 | If StartBit is greater than 63, then ASSERT(). | |
4490 | If EndBit is greater than 63, then ASSERT(). | |
4491 | If EndBit is less than StartBit, then ASSERT(). | |
4492 | ||
4493 | @param Index The 32-bit MSR index to write. | |
4494 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4495 | Range 0..63. | |
4496 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4497 | Range 0..63. | |
4498 | @param AndData The value to AND with the read value from the bit field. | |
4499 | ||
4500 | @return The value written back to the MSR. | |
4501 | ||
4502 | **/ | |
4503 | UINT64 | |
4504 | EFIAPI | |
4505 | AsmMsrBitFieldAnd64 ( | |
4506 | IN UINT32 Index, | |
4507 | IN UINTN StartBit, | |
4508 | IN UINTN EndBit, | |
4509 | IN UINT64 AndData | |
4510 | ); | |
4511 | ||
d57e9bdc | 4512 | |
d958721a | 4513 | /** |
4514 | Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a | |
4515 | bitwise inclusive OR, and writes the result back to the bit field in the | |
4516 | 64-bit MSR. | |
4517 | ||
4518 | Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by | |
4519 | a bitwise inclusive OR between the read result and the value specified by | |
4520 | AndData, and writes the result to the 64-bit MSR specified by Index. The | |
4521 | value written to the MSR is returned. Extra left bits in both AndData and | |
4522 | OrData are stripped. The caller must either guarantee that Index and the data | |
4523 | written is valid, or the caller must set up exception handlers to catch the | |
4524 | exceptions. This function is only available on IA-32 and X64. | |
4525 | ||
4526 | If StartBit is greater than 63, then ASSERT(). | |
4527 | If EndBit is greater than 63, then ASSERT(). | |
4528 | If EndBit is less than StartBit, then ASSERT(). | |
4529 | ||
4530 | @param Index The 32-bit MSR index to write. | |
4531 | @param StartBit The ordinal of the least significant bit in the bit field. | |
4532 | Range 0..63. | |
4533 | @param EndBit The ordinal of the most significant bit in the bit field. | |
4534 | Range 0..63. | |
4535 | @param AndData The value to AND with the read value from the bit field. | |
4536 | @param OrData The value to OR with the result of the AND operation. | |
4537 | ||
4538 | @return The value written back to the MSR. | |
4539 | ||
4540 | **/ | |
4541 | UINT64 | |
4542 | EFIAPI | |
4543 | AsmMsrBitFieldAndThenOr64 ( | |
4544 | IN UINT32 Index, | |
4545 | IN UINTN StartBit, | |
4546 | IN UINTN EndBit, | |
4547 | IN UINT64 AndData, | |
4548 | IN UINT64 OrData | |
4549 | ); | |
4550 | ||
d57e9bdc | 4551 | |
d958721a | 4552 | /** |
4553 | Reads the current value of the EFLAGS register. | |
4554 | ||
4555 | Reads and returns the current value of the EFLAGS register. This function is | |
4556 | only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a | |
4557 | 64-bit value on X64. | |
4558 | ||
4559 | @return EFLAGS on IA-32 or RFLAGS on X64. | |
4560 | ||
4561 | **/ | |
4562 | UINTN | |
4563 | EFIAPI | |
4564 | AsmReadEflags ( | |
4565 | VOID | |
4566 | ); | |
4567 | ||
d57e9bdc | 4568 | |
d958721a | 4569 | /** |
4570 | Reads the current value of the Control Register 0 (CR0). | |
4571 | ||
4572 | Reads and returns the current value of CR0. This function is only available | |
4573 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4574 | X64. | |
4575 | ||
4576 | @return The value of the Control Register 0 (CR0). | |
4577 | ||
4578 | **/ | |
4579 | UINTN | |
4580 | EFIAPI | |
4581 | AsmReadCr0 ( | |
4582 | VOID | |
4583 | ); | |
4584 | ||
d57e9bdc | 4585 | |
d958721a | 4586 | /** |
4587 | Reads the current value of the Control Register 2 (CR2). | |
4588 | ||
4589 | Reads and returns the current value of CR2. This function is only available | |
4590 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4591 | X64. | |
4592 | ||
4593 | @return The value of the Control Register 2 (CR2). | |
4594 | ||
4595 | **/ | |
4596 | UINTN | |
4597 | EFIAPI | |
4598 | AsmReadCr2 ( | |
4599 | VOID | |
4600 | ); | |
4601 | ||
d57e9bdc | 4602 | |
d958721a | 4603 | /** |
4604 | Reads the current value of the Control Register 3 (CR3). | |
4605 | ||
4606 | Reads and returns the current value of CR3. This function is only available | |
4607 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4608 | X64. | |
4609 | ||
4610 | @return The value of the Control Register 3 (CR3). | |
4611 | ||
4612 | **/ | |
4613 | UINTN | |
4614 | EFIAPI | |
4615 | AsmReadCr3 ( | |
4616 | VOID | |
4617 | ); | |
4618 | ||
d57e9bdc | 4619 | |
d958721a | 4620 | /** |
4621 | Reads the current value of the Control Register 4 (CR4). | |
4622 | ||
4623 | Reads and returns the current value of CR4. This function is only available | |
4624 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4625 | X64. | |
4626 | ||
4627 | @return The value of the Control Register 4 (CR4). | |
4628 | ||
4629 | **/ | |
4630 | UINTN | |
4631 | EFIAPI | |
4632 | AsmReadCr4 ( | |
4633 | VOID | |
4634 | ); | |
4635 | ||
d57e9bdc | 4636 | |
d958721a | 4637 | /** |
4638 | Writes a value to Control Register 0 (CR0). | |
4639 | ||
4640 | Writes and returns a new value to CR0. This function is only available on | |
4641 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4642 | ||
4643 | @param Cr0 The value to write to CR0. | |
4644 | ||
4645 | @return The value written to CR0. | |
4646 | ||
4647 | **/ | |
4648 | UINTN | |
4649 | EFIAPI | |
4650 | AsmWriteCr0 ( | |
4651 | UINTN Cr0 | |
4652 | ); | |
4653 | ||
d57e9bdc | 4654 | |
d958721a | 4655 | /** |
4656 | Writes a value to Control Register 2 (CR2). | |
4657 | ||
4658 | Writes and returns a new value to CR2. This function is only available on | |
4659 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4660 | ||
4661 | @param Cr2 The value to write to CR2. | |
4662 | ||
4663 | @return The value written to CR2. | |
4664 | ||
4665 | **/ | |
4666 | UINTN | |
4667 | EFIAPI | |
4668 | AsmWriteCr2 ( | |
4669 | UINTN Cr2 | |
4670 | ); | |
4671 | ||
d57e9bdc | 4672 | |
d958721a | 4673 | /** |
4674 | Writes a value to Control Register 3 (CR3). | |
4675 | ||
4676 | Writes and returns a new value to CR3. This function is only available on | |
4677 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4678 | ||
4679 | @param Cr3 The value to write to CR3. | |
4680 | ||
4681 | @return The value written to CR3. | |
4682 | ||
4683 | **/ | |
4684 | UINTN | |
4685 | EFIAPI | |
4686 | AsmWriteCr3 ( | |
4687 | UINTN Cr3 | |
4688 | ); | |
4689 | ||
d57e9bdc | 4690 | |
d958721a | 4691 | /** |
4692 | Writes a value to Control Register 4 (CR4). | |
4693 | ||
4694 | Writes and returns a new value to CR4. This function is only available on | |
4695 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4696 | ||
4697 | @param Cr4 The value to write to CR4. | |
4698 | ||
4699 | @return The value written to CR4. | |
4700 | ||
4701 | **/ | |
4702 | UINTN | |
4703 | EFIAPI | |
4704 | AsmWriteCr4 ( | |
4705 | UINTN Cr4 | |
4706 | ); | |
4707 | ||
d57e9bdc | 4708 | |
d958721a | 4709 | /** |
4710 | Reads the current value of Debug Register 0 (DR0). | |
4711 | ||
4712 | Reads and returns the current value of DR0. This function is only available | |
4713 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4714 | X64. | |
4715 | ||
4716 | @return The value of Debug Register 0 (DR0). | |
4717 | ||
4718 | **/ | |
4719 | UINTN | |
4720 | EFIAPI | |
4721 | AsmReadDr0 ( | |
4722 | VOID | |
4723 | ); | |
4724 | ||
d57e9bdc | 4725 | |
d958721a | 4726 | /** |
4727 | Reads the current value of Debug Register 1 (DR1). | |
4728 | ||
4729 | Reads and returns the current value of DR1. This function is only available | |
4730 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4731 | X64. | |
4732 | ||
4733 | @return The value of Debug Register 1 (DR1). | |
4734 | ||
4735 | **/ | |
4736 | UINTN | |
4737 | EFIAPI | |
4738 | AsmReadDr1 ( | |
4739 | VOID | |
4740 | ); | |
4741 | ||
d57e9bdc | 4742 | |
d958721a | 4743 | /** |
4744 | Reads the current value of Debug Register 2 (DR2). | |
4745 | ||
4746 | Reads and returns the current value of DR2. This function is only available | |
4747 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4748 | X64. | |
4749 | ||
4750 | @return The value of Debug Register 2 (DR2). | |
4751 | ||
4752 | **/ | |
4753 | UINTN | |
4754 | EFIAPI | |
4755 | AsmReadDr2 ( | |
4756 | VOID | |
4757 | ); | |
4758 | ||
d57e9bdc | 4759 | |
d958721a | 4760 | /** |
4761 | Reads the current value of Debug Register 3 (DR3). | |
4762 | ||
4763 | Reads and returns the current value of DR3. This function is only available | |
4764 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4765 | X64. | |
4766 | ||
4767 | @return The value of Debug Register 3 (DR3). | |
4768 | ||
4769 | **/ | |
4770 | UINTN | |
4771 | EFIAPI | |
4772 | AsmReadDr3 ( | |
4773 | VOID | |
4774 | ); | |
4775 | ||
d57e9bdc | 4776 | |
d958721a | 4777 | /** |
4778 | Reads the current value of Debug Register 4 (DR4). | |
4779 | ||
4780 | Reads and returns the current value of DR4. This function is only available | |
4781 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4782 | X64. | |
4783 | ||
4784 | @return The value of Debug Register 4 (DR4). | |
4785 | ||
4786 | **/ | |
4787 | UINTN | |
4788 | EFIAPI | |
4789 | AsmReadDr4 ( | |
4790 | VOID | |
4791 | ); | |
4792 | ||
d57e9bdc | 4793 | |
d958721a | 4794 | /** |
4795 | Reads the current value of Debug Register 5 (DR5). | |
4796 | ||
4797 | Reads and returns the current value of DR5. This function is only available | |
4798 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4799 | X64. | |
4800 | ||
4801 | @return The value of Debug Register 5 (DR5). | |
4802 | ||
4803 | **/ | |
4804 | UINTN | |
4805 | EFIAPI | |
4806 | AsmReadDr5 ( | |
4807 | VOID | |
4808 | ); | |
4809 | ||
d57e9bdc | 4810 | |
d958721a | 4811 | /** |
4812 | Reads the current value of Debug Register 6 (DR6). | |
4813 | ||
4814 | Reads and returns the current value of DR6. This function is only available | |
4815 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4816 | X64. | |
4817 | ||
4818 | @return The value of Debug Register 6 (DR6). | |
4819 | ||
4820 | **/ | |
4821 | UINTN | |
4822 | EFIAPI | |
4823 | AsmReadDr6 ( | |
4824 | VOID | |
4825 | ); | |
4826 | ||
d57e9bdc | 4827 | |
d958721a | 4828 | /** |
4829 | Reads the current value of Debug Register 7 (DR7). | |
4830 | ||
4831 | Reads and returns the current value of DR7. This function is only available | |
4832 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
4833 | X64. | |
4834 | ||
4835 | @return The value of Debug Register 7 (DR7). | |
4836 | ||
4837 | **/ | |
4838 | UINTN | |
4839 | EFIAPI | |
4840 | AsmReadDr7 ( | |
4841 | VOID | |
4842 | ); | |
4843 | ||
d57e9bdc | 4844 | |
d958721a | 4845 | /** |
4846 | Writes a value to Debug Register 0 (DR0). | |
4847 | ||
4848 | Writes and returns a new value to DR0. This function is only available on | |
4849 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4850 | ||
4851 | @param Dr0 The value to write to Dr0. | |
4852 | ||
4853 | @return The value written to Debug Register 0 (DR0). | |
4854 | ||
4855 | **/ | |
4856 | UINTN | |
4857 | EFIAPI | |
4858 | AsmWriteDr0 ( | |
4859 | UINTN Dr0 | |
4860 | ); | |
4861 | ||
d57e9bdc | 4862 | |
d958721a | 4863 | /** |
4864 | Writes a value to Debug Register 1 (DR1). | |
4865 | ||
4866 | Writes and returns a new value to DR1. This function is only available on | |
4867 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4868 | ||
4869 | @param Dr1 The value to write to Dr1. | |
4870 | ||
4871 | @return The value written to Debug Register 1 (DR1). | |
4872 | ||
4873 | **/ | |
4874 | UINTN | |
4875 | EFIAPI | |
4876 | AsmWriteDr1 ( | |
4877 | UINTN Dr1 | |
4878 | ); | |
4879 | ||
d57e9bdc | 4880 | |
d958721a | 4881 | /** |
4882 | Writes a value to Debug Register 2 (DR2). | |
4883 | ||
4884 | Writes and returns a new value to DR2. This function is only available on | |
4885 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4886 | ||
4887 | @param Dr2 The value to write to Dr2. | |
4888 | ||
4889 | @return The value written to Debug Register 2 (DR2). | |
4890 | ||
4891 | **/ | |
4892 | UINTN | |
4893 | EFIAPI | |
4894 | AsmWriteDr2 ( | |
4895 | UINTN Dr2 | |
4896 | ); | |
4897 | ||
d57e9bdc | 4898 | |
d958721a | 4899 | /** |
4900 | Writes a value to Debug Register 3 (DR3). | |
4901 | ||
4902 | Writes and returns a new value to DR3. This function is only available on | |
4903 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4904 | ||
4905 | @param Dr3 The value to write to Dr3. | |
4906 | ||
4907 | @return The value written to Debug Register 3 (DR3). | |
4908 | ||
4909 | **/ | |
4910 | UINTN | |
4911 | EFIAPI | |
4912 | AsmWriteDr3 ( | |
4913 | UINTN Dr3 | |
4914 | ); | |
4915 | ||
d57e9bdc | 4916 | |
d958721a | 4917 | /** |
4918 | Writes a value to Debug Register 4 (DR4). | |
4919 | ||
4920 | Writes and returns a new value to DR4. This function is only available on | |
4921 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4922 | ||
4923 | @param Dr4 The value to write to Dr4. | |
4924 | ||
4925 | @return The value written to Debug Register 4 (DR4). | |
4926 | ||
4927 | **/ | |
4928 | UINTN | |
4929 | EFIAPI | |
4930 | AsmWriteDr4 ( | |
4931 | UINTN Dr4 | |
4932 | ); | |
4933 | ||
d57e9bdc | 4934 | |
d958721a | 4935 | /** |
4936 | Writes a value to Debug Register 5 (DR5). | |
4937 | ||
4938 | Writes and returns a new value to DR5. This function is only available on | |
4939 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4940 | ||
4941 | @param Dr5 The value to write to Dr5. | |
4942 | ||
4943 | @return The value written to Debug Register 5 (DR5). | |
4944 | ||
4945 | **/ | |
4946 | UINTN | |
4947 | EFIAPI | |
4948 | AsmWriteDr5 ( | |
4949 | UINTN Dr5 | |
4950 | ); | |
4951 | ||
d57e9bdc | 4952 | |
d958721a | 4953 | /** |
4954 | Writes a value to Debug Register 6 (DR6). | |
4955 | ||
4956 | Writes and returns a new value to DR6. This function is only available on | |
4957 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4958 | ||
4959 | @param Dr6 The value to write to Dr6. | |
4960 | ||
4961 | @return The value written to Debug Register 6 (DR6). | |
4962 | ||
4963 | **/ | |
4964 | UINTN | |
4965 | EFIAPI | |
4966 | AsmWriteDr6 ( | |
4967 | UINTN Dr6 | |
4968 | ); | |
4969 | ||
d57e9bdc | 4970 | |
d958721a | 4971 | /** |
4972 | Writes a value to Debug Register 7 (DR7). | |
4973 | ||
4974 | Writes and returns a new value to DR7. This function is only available on | |
4975 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
4976 | ||
4977 | @param Dr7 The value to write to Dr7. | |
4978 | ||
4979 | @return The value written to Debug Register 7 (DR7). | |
4980 | ||
4981 | **/ | |
4982 | UINTN | |
4983 | EFIAPI | |
4984 | AsmWriteDr7 ( | |
4985 | UINTN Dr7 | |
4986 | ); | |
4987 | ||
d57e9bdc | 4988 | |
d958721a | 4989 | /** |
4990 | Reads the current value of Code Segment Register (CS). | |
4991 | ||
4992 | Reads and returns the current value of CS. This function is only available on | |
4993 | IA-32 and X64. | |
4994 | ||
4995 | @return The current value of CS. | |
4996 | ||
4997 | **/ | |
4998 | UINT16 | |
4999 | EFIAPI | |
5000 | AsmReadCs ( | |
5001 | VOID | |
5002 | ); | |
5003 | ||
d57e9bdc | 5004 | |
d958721a | 5005 | /** |
5006 | Reads the current value of Data Segment Register (DS). | |
5007 | ||
5008 | Reads and returns the current value of DS. This function is only available on | |
5009 | IA-32 and X64. | |
5010 | ||
5011 | @return The current value of DS. | |
5012 | ||
5013 | **/ | |
5014 | UINT16 | |
5015 | EFIAPI | |
5016 | AsmReadDs ( | |
5017 | VOID | |
5018 | ); | |
5019 | ||
d57e9bdc | 5020 | |
d958721a | 5021 | /** |
5022 | Reads the current value of Extra Segment Register (ES). | |
5023 | ||
5024 | Reads and returns the current value of ES. This function is only available on | |
5025 | IA-32 and X64. | |
5026 | ||
5027 | @return The current value of ES. | |
5028 | ||
5029 | **/ | |
5030 | UINT16 | |
5031 | EFIAPI | |
5032 | AsmReadEs ( | |
5033 | VOID | |
5034 | ); | |
5035 | ||
d57e9bdc | 5036 | |
d958721a | 5037 | /** |
5038 | Reads the current value of FS Data Segment Register (FS). | |
5039 | ||
5040 | Reads and returns the current value of FS. This function is only available on | |
5041 | IA-32 and X64. | |
5042 | ||
5043 | @return The current value of FS. | |
5044 | ||
5045 | **/ | |
5046 | UINT16 | |
5047 | EFIAPI | |
5048 | AsmReadFs ( | |
5049 | VOID | |
5050 | ); | |
5051 | ||
d57e9bdc | 5052 | |
d958721a | 5053 | /** |
5054 | Reads the current value of GS Data Segment Register (GS). | |
5055 | ||
5056 | Reads and returns the current value of GS. This function is only available on | |
5057 | IA-32 and X64. | |
5058 | ||
5059 | @return The current value of GS. | |
5060 | ||
5061 | **/ | |
5062 | UINT16 | |
5063 | EFIAPI | |
5064 | AsmReadGs ( | |
5065 | VOID | |
5066 | ); | |
5067 | ||
d57e9bdc | 5068 | |
d958721a | 5069 | /** |
5070 | Reads the current value of Stack Segment Register (SS). | |
5071 | ||
5072 | Reads and returns the current value of SS. This function is only available on | |
5073 | IA-32 and X64. | |
5074 | ||
5075 | @return The current value of SS. | |
5076 | ||
5077 | **/ | |
5078 | UINT16 | |
5079 | EFIAPI | |
5080 | AsmReadSs ( | |
5081 | VOID | |
5082 | ); | |
5083 | ||
d57e9bdc | 5084 | |
d958721a | 5085 | /** |
5086 | Reads the current value of Task Register (TR). | |
5087 | ||
5088 | Reads and returns the current value of TR. This function is only available on | |
5089 | IA-32 and X64. | |
5090 | ||
5091 | @return The current value of TR. | |
5092 | ||
5093 | **/ | |
5094 | UINT16 | |
5095 | EFIAPI | |
5096 | AsmReadTr ( | |
5097 | VOID | |
5098 | ); | |
5099 | ||
d57e9bdc | 5100 | |
d958721a | 5101 | /** |
5102 | Reads the current Global Descriptor Table Register(GDTR) descriptor. | |
5103 | ||
5104 | Reads and returns the current GDTR descriptor and returns it in Gdtr. This | |
5105 | function is only available on IA-32 and X64. | |
5106 | ||
5107 | If Gdtr is NULL, then ASSERT(). | |
5108 | ||
5109 | @param Gdtr Pointer to a GDTR descriptor. | |
5110 | ||
5111 | **/ | |
5112 | VOID | |
5113 | EFIAPI | |
5114 | AsmReadGdtr ( | |
5115 | OUT IA32_DESCRIPTOR *Gdtr | |
5116 | ); | |
5117 | ||
d57e9bdc | 5118 | |
d958721a | 5119 | /** |
5120 | Writes the current Global Descriptor Table Register (GDTR) descriptor. | |
5121 | ||
5122 | Writes and the current GDTR descriptor specified by Gdtr. This function is | |
5123 | only available on IA-32 and X64. | |
5124 | ||
5125 | If Gdtr is NULL, then ASSERT(). | |
5126 | ||
5127 | @param Gdtr Pointer to a GDTR descriptor. | |
5128 | ||
5129 | **/ | |
5130 | VOID | |
5131 | EFIAPI | |
5132 | AsmWriteGdtr ( | |
5133 | IN CONST IA32_DESCRIPTOR *Gdtr | |
5134 | ); | |
5135 | ||
d57e9bdc | 5136 | |
d958721a | 5137 | /** |
5138 | Reads the current Interrupt Descriptor Table Register(GDTR) descriptor. | |
5139 | ||
5140 | Reads and returns the current IDTR descriptor and returns it in Idtr. This | |
5141 | function is only available on IA-32 and X64. | |
5142 | ||
5143 | If Idtr is NULL, then ASSERT(). | |
5144 | ||
5145 | @param Idtr Pointer to a IDTR descriptor. | |
5146 | ||
5147 | **/ | |
5148 | VOID | |
5149 | EFIAPI | |
5150 | AsmReadIdtr ( | |
5151 | OUT IA32_DESCRIPTOR *Idtr | |
5152 | ); | |
5153 | ||
d57e9bdc | 5154 | |
d958721a | 5155 | /** |
5156 | Writes the current Interrupt Descriptor Table Register(GDTR) descriptor. | |
5157 | ||
5158 | Writes the current IDTR descriptor and returns it in Idtr. This function is | |
5159 | only available on IA-32 and X64. | |
5160 | ||
5161 | If Idtr is NULL, then ASSERT(). | |
5162 | ||
5163 | @param Idtr Pointer to a IDTR descriptor. | |
5164 | ||
5165 | **/ | |
5166 | VOID | |
5167 | EFIAPI | |
5168 | AsmWriteIdtr ( | |
5169 | IN CONST IA32_DESCRIPTOR *Idtr | |
5170 | ); | |
5171 | ||
d57e9bdc | 5172 | |
d958721a | 5173 | /** |
5174 | Reads the current Local Descriptor Table Register(LDTR) selector. | |
5175 | ||
5176 | Reads and returns the current 16-bit LDTR descriptor value. This function is | |
5177 | only available on IA-32 and X64. | |
5178 | ||
5179 | @return The current selector of LDT. | |
5180 | ||
5181 | **/ | |
5182 | UINT16 | |
5183 | EFIAPI | |
5184 | AsmReadLdtr ( | |
5185 | VOID | |
5186 | ); | |
5187 | ||
d57e9bdc | 5188 | |
d958721a | 5189 | /** |
5190 | Writes the current Local Descriptor Table Register (GDTR) selector. | |
5191 | ||
5192 | Writes and the current LDTR descriptor specified by Ldtr. This function is | |
5193 | only available on IA-32 and X64. | |
5194 | ||
5195 | @param Ldtr 16-bit LDTR selector value. | |
5196 | ||
5197 | **/ | |
5198 | VOID | |
5199 | EFIAPI | |
5200 | AsmWriteLdtr ( | |
5201 | IN UINT16 Ldtr | |
5202 | ); | |
5203 | ||
d57e9bdc | 5204 | |
d958721a | 5205 | /** |
5206 | Save the current floating point/SSE/SSE2 context to a buffer. | |
5207 | ||
5208 | Saves the current floating point/SSE/SSE2 state to the buffer specified by | |
5209 | Buffer. Buffer must be aligned on a 16-byte boundary. This function is only | |
5210 | available on IA-32 and X64. | |
5211 | ||
5212 | If Buffer is NULL, then ASSERT(). | |
5213 | If Buffer is not aligned on a 16-byte boundary, then ASSERT(). | |
5214 | ||
5215 | @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. | |
5216 | ||
5217 | **/ | |
5218 | VOID | |
5219 | EFIAPI | |
5220 | AsmFxSave ( | |
5221 | OUT IA32_FX_BUFFER *Buffer | |
5222 | ); | |
5223 | ||
d57e9bdc | 5224 | |
d958721a | 5225 | /** |
5226 | Restores the current floating point/SSE/SSE2 context from a buffer. | |
5227 | ||
5228 | Restores the current floating point/SSE/SSE2 state from the buffer specified | |
5229 | by Buffer. Buffer must be aligned on a 16-byte boundary. This function is | |
5230 | only available on IA-32 and X64. | |
5231 | ||
5232 | If Buffer is NULL, then ASSERT(). | |
5233 | If Buffer is not aligned on a 16-byte boundary, then ASSERT(). | |
5234 | If Buffer was not saved with AsmFxSave(), then ASSERT(). | |
5235 | ||
5236 | @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. | |
5237 | ||
5238 | **/ | |
5239 | VOID | |
5240 | EFIAPI | |
5241 | AsmFxRestore ( | |
5242 | IN CONST IA32_FX_BUFFER *Buffer | |
5243 | ); | |
5244 | ||
d57e9bdc | 5245 | |
d958721a | 5246 | /** |
5247 | Reads the current value of 64-bit MMX Register #0 (MM0). | |
5248 | ||
5249 | Reads and returns the current value of MM0. This function is only available | |
5250 | on IA-32 and X64. | |
5251 | ||
5252 | @return The current value of MM0. | |
5253 | ||
5254 | **/ | |
5255 | UINT64 | |
5256 | EFIAPI | |
5257 | AsmReadMm0 ( | |
5258 | VOID | |
5259 | ); | |
5260 | ||
d57e9bdc | 5261 | |
d958721a | 5262 | /** |
5263 | Reads the current value of 64-bit MMX Register #1 (MM1). | |
5264 | ||
5265 | Reads and returns the current value of MM1. This function is only available | |
5266 | on IA-32 and X64. | |
5267 | ||
5268 | @return The current value of MM1. | |
5269 | ||
5270 | **/ | |
5271 | UINT64 | |
5272 | EFIAPI | |
5273 | AsmReadMm1 ( | |
5274 | VOID | |
5275 | ); | |
5276 | ||
d57e9bdc | 5277 | |
d958721a | 5278 | /** |
5279 | Reads the current value of 64-bit MMX Register #2 (MM2). | |
5280 | ||
5281 | Reads and returns the current value of MM2. This function is only available | |
5282 | on IA-32 and X64. | |
5283 | ||
5284 | @return The current value of MM2. | |
5285 | ||
5286 | **/ | |
5287 | UINT64 | |
5288 | EFIAPI | |
5289 | AsmReadMm2 ( | |
5290 | VOID | |
5291 | ); | |
5292 | ||
d57e9bdc | 5293 | |
d958721a | 5294 | /** |
5295 | Reads the current value of 64-bit MMX Register #3 (MM3). | |
5296 | ||
5297 | Reads and returns the current value of MM3. This function is only available | |
5298 | on IA-32 and X64. | |
5299 | ||
5300 | @return The current value of MM3. | |
5301 | ||
5302 | **/ | |
5303 | UINT64 | |
5304 | EFIAPI | |
5305 | AsmReadMm3 ( | |
5306 | VOID | |
5307 | ); | |
5308 | ||
d57e9bdc | 5309 | |
d958721a | 5310 | /** |
5311 | Reads the current value of 64-bit MMX Register #4 (MM4). | |
5312 | ||
5313 | Reads and returns the current value of MM4. This function is only available | |
5314 | on IA-32 and X64. | |
5315 | ||
5316 | @return The current value of MM4. | |
5317 | ||
5318 | **/ | |
5319 | UINT64 | |
5320 | EFIAPI | |
5321 | AsmReadMm4 ( | |
5322 | VOID | |
5323 | ); | |
5324 | ||
d57e9bdc | 5325 | |
d958721a | 5326 | /** |
5327 | Reads the current value of 64-bit MMX Register #5 (MM5). | |
5328 | ||
5329 | Reads and returns the current value of MM5. This function is only available | |
5330 | on IA-32 and X64. | |
5331 | ||
5332 | @return The current value of MM5. | |
5333 | ||
5334 | **/ | |
5335 | UINT64 | |
5336 | EFIAPI | |
5337 | AsmReadMm5 ( | |
5338 | VOID | |
5339 | ); | |
5340 | ||
d57e9bdc | 5341 | |
d958721a | 5342 | /** |
5343 | Reads the current value of 64-bit MMX Register #6 (MM6). | |
5344 | ||
5345 | Reads and returns the current value of MM6. This function is only available | |
5346 | on IA-32 and X64. | |
5347 | ||
5348 | @return The current value of MM6. | |
5349 | ||
5350 | **/ | |
5351 | UINT64 | |
5352 | EFIAPI | |
5353 | AsmReadMm6 ( | |
5354 | VOID | |
5355 | ); | |
5356 | ||
d57e9bdc | 5357 | |
d958721a | 5358 | /** |
5359 | Reads the current value of 64-bit MMX Register #7 (MM7). | |
5360 | ||
5361 | Reads and returns the current value of MM7. This function is only available | |
5362 | on IA-32 and X64. | |
5363 | ||
5364 | @return The current value of MM7. | |
5365 | ||
5366 | **/ | |
5367 | UINT64 | |
5368 | EFIAPI | |
5369 | AsmReadMm7 ( | |
5370 | VOID | |
5371 | ); | |
5372 | ||
d57e9bdc | 5373 | |
d958721a | 5374 | /** |
5375 | Writes the current value of 64-bit MMX Register #0 (MM0). | |
5376 | ||
5377 | Writes the current value of MM0. This function is only available on IA32 and | |
5378 | X64. | |
5379 | ||
5380 | @param Value The 64-bit value to write to MM0. | |
5381 | ||
5382 | **/ | |
5383 | VOID | |
5384 | EFIAPI | |
5385 | AsmWriteMm0 ( | |
5386 | IN UINT64 Value | |
5387 | ); | |
5388 | ||
d57e9bdc | 5389 | |
d958721a | 5390 | /** |
5391 | Writes the current value of 64-bit MMX Register #1 (MM1). | |
5392 | ||
5393 | Writes the current value of MM1. This function is only available on IA32 and | |
5394 | X64. | |
5395 | ||
5396 | @param Value The 64-bit value to write to MM1. | |
5397 | ||
5398 | **/ | |
5399 | VOID | |
5400 | EFIAPI | |
5401 | AsmWriteMm1 ( | |
5402 | IN UINT64 Value | |
5403 | ); | |
5404 | ||
d57e9bdc | 5405 | |
d958721a | 5406 | /** |
5407 | Writes the current value of 64-bit MMX Register #2 (MM2). | |
5408 | ||
5409 | Writes the current value of MM2. This function is only available on IA32 and | |
5410 | X64. | |
5411 | ||
5412 | @param Value The 64-bit value to write to MM2. | |
5413 | ||
5414 | **/ | |
5415 | VOID | |
5416 | EFIAPI | |
5417 | AsmWriteMm2 ( | |
5418 | IN UINT64 Value | |
5419 | ); | |
5420 | ||
d57e9bdc | 5421 | |
d958721a | 5422 | /** |
5423 | Writes the current value of 64-bit MMX Register #3 (MM3). | |
5424 | ||
5425 | Writes the current value of MM3. This function is only available on IA32 and | |
5426 | X64. | |
5427 | ||
5428 | @param Value The 64-bit value to write to MM3. | |
5429 | ||
5430 | **/ | |
5431 | VOID | |
5432 | EFIAPI | |
5433 | AsmWriteMm3 ( | |
5434 | IN UINT64 Value | |
5435 | ); | |
5436 | ||
d57e9bdc | 5437 | |
d958721a | 5438 | /** |
5439 | Writes the current value of 64-bit MMX Register #4 (MM4). | |
5440 | ||
5441 | Writes the current value of MM4. This function is only available on IA32 and | |
5442 | X64. | |
5443 | ||
5444 | @param Value The 64-bit value to write to MM4. | |
5445 | ||
5446 | **/ | |
5447 | VOID | |
5448 | EFIAPI | |
5449 | AsmWriteMm4 ( | |
5450 | IN UINT64 Value | |
5451 | ); | |
5452 | ||
d57e9bdc | 5453 | |
d958721a | 5454 | /** |
5455 | Writes the current value of 64-bit MMX Register #5 (MM5). | |
5456 | ||
5457 | Writes the current value of MM5. This function is only available on IA32 and | |
5458 | X64. | |
5459 | ||
5460 | @param Value The 64-bit value to write to MM5. | |
5461 | ||
5462 | **/ | |
5463 | VOID | |
5464 | EFIAPI | |
5465 | AsmWriteMm5 ( | |
5466 | IN UINT64 Value | |
5467 | ); | |
5468 | ||
d57e9bdc | 5469 | |
d958721a | 5470 | /** |
5471 | Writes the current value of 64-bit MMX Register #6 (MM6). | |
5472 | ||
5473 | Writes the current value of MM6. This function is only available on IA32 and | |
5474 | X64. | |
5475 | ||
5476 | @param Value The 64-bit value to write to MM6. | |
5477 | ||
5478 | **/ | |
5479 | VOID | |
5480 | EFIAPI | |
5481 | AsmWriteMm6 ( | |
5482 | IN UINT64 Value | |
5483 | ); | |
5484 | ||
d57e9bdc | 5485 | |
d958721a | 5486 | /** |
5487 | Writes the current value of 64-bit MMX Register #7 (MM7). | |
5488 | ||
5489 | Writes the current value of MM7. This function is only available on IA32 and | |
5490 | X64. | |
5491 | ||
5492 | @param Value The 64-bit value to write to MM7. | |
5493 | ||
5494 | **/ | |
5495 | VOID | |
5496 | EFIAPI | |
5497 | AsmWriteMm7 ( | |
5498 | IN UINT64 Value | |
5499 | ); | |
5500 | ||
d57e9bdc | 5501 | |
d958721a | 5502 | /** |
5503 | Reads the current value of Time Stamp Counter (TSC). | |
5504 | ||
5505 | Reads and returns the current value of TSC. This function is only available | |
5506 | on IA-32 and X64. | |
5507 | ||
5508 | @return The current value of TSC | |
5509 | ||
5510 | **/ | |
5511 | UINT64 | |
5512 | EFIAPI | |
5513 | AsmReadTsc ( | |
5514 | VOID | |
5515 | ); | |
5516 | ||
d57e9bdc | 5517 | |
d958721a | 5518 | /** |
5519 | Reads the current value of a Performance Counter (PMC). | |
5520 | ||
5521 | Reads and returns the current value of performance counter specified by | |
5522 | Index. This function is only available on IA-32 and X64. | |
5523 | ||
5524 | @param Index The 32-bit Performance Counter index to read. | |
5525 | ||
5526 | @return The value of the PMC specified by Index. | |
5527 | ||
5528 | **/ | |
5529 | UINT64 | |
5530 | EFIAPI | |
5531 | AsmReadPmc ( | |
5532 | IN UINT32 Index | |
5533 | ); | |
5534 | ||
d57e9bdc | 5535 | |
d958721a | 5536 | /** |
5537 | Sets up a monitor buffer that is used by AsmMwait(). | |
5538 | ||
5539 | Executes a MONITOR instruction with the register state specified by Eax, Ecx | |
5540 | and Edx. Returns Eax. This function is only available on IA-32 and X64. | |
5541 | ||
5542 | @param Eax The value to load into EAX or RAX before executing the MONITOR | |
5543 | instruction. | |
5544 | @param Ecx The value to load into ECX or RCX before executing the MONITOR | |
5545 | instruction. | |
5546 | @param Edx The value to load into EDX or RDX before executing the MONITOR | |
5547 | instruction. | |
5548 | ||
5549 | @return Eax | |
5550 | ||
5551 | **/ | |
5552 | UINTN | |
5553 | EFIAPI | |
5554 | AsmMonitor ( | |
5555 | IN UINTN Eax, | |
5556 | IN UINTN Ecx, | |
5557 | IN UINTN Edx | |
5558 | ); | |
5559 | ||
d57e9bdc | 5560 | |
d958721a | 5561 | /** |
5562 | Executes an MWAIT instruction. | |
5563 | ||
5564 | Executes an MWAIT instruction with the register state specified by Eax and | |
5565 | Ecx. Returns Eax. This function is only available on IA-32 and X64. | |
5566 | ||
5567 | @param Eax The value to load into EAX or RAX before executing the MONITOR | |
5568 | instruction. | |
5569 | @param Ecx The value to load into ECX or RCX before executing the MONITOR | |
5570 | instruction. | |
5571 | ||
5572 | @return Eax | |
5573 | ||
5574 | **/ | |
5575 | UINTN | |
5576 | EFIAPI | |
5577 | AsmMwait ( | |
5578 | IN UINTN Eax, | |
5579 | IN UINTN Ecx | |
5580 | ); | |
5581 | ||
d57e9bdc | 5582 | |
d958721a | 5583 | /** |
5584 | Executes a WBINVD instruction. | |
5585 | ||
5586 | Executes a WBINVD instruction. This function is only available on IA-32 and | |
5587 | X64. | |
5588 | ||
5589 | **/ | |
5590 | VOID | |
5591 | EFIAPI | |
5592 | AsmWbinvd ( | |
5593 | VOID | |
5594 | ); | |
5595 | ||
d57e9bdc | 5596 | |
d958721a | 5597 | /** |
5598 | Executes a INVD instruction. | |
5599 | ||
5600 | Executes a INVD instruction. This function is only available on IA-32 and | |
5601 | X64. | |
5602 | ||
5603 | **/ | |
5604 | VOID | |
5605 | EFIAPI | |
5606 | AsmInvd ( | |
5607 | VOID | |
5608 | ); | |
5609 | ||
d57e9bdc | 5610 | |
d958721a | 5611 | /** |
5612 | Flushes a cache line from all the instruction and data caches within the | |
5613 | coherency domain of the CPU. | |
5614 | ||
5615 | Flushed the cache line specified by LinearAddress, and returns LinearAddress. | |
5616 | This function is only available on IA-32 and X64. | |
5617 | ||
5618 | @param LinearAddress The address of the cache line to flush. If the CPU is | |
5619 | in a physical addressing mode, then LinearAddress is a | |
5620 | physical address. If the CPU is in a virtual | |
5621 | addressing mode, then LinearAddress is a virtual | |
5622 | address. | |
5623 | ||
5624 | @return LinearAddress | |
5625 | **/ | |
5626 | VOID * | |
5627 | EFIAPI | |
5628 | AsmFlushCacheLine ( | |
5629 | IN VOID *LinearAddress | |
5630 | ); | |
5631 | ||
d57e9bdc | 5632 | |
d958721a | 5633 | /** |
5634 | Enables the 32-bit paging mode on the CPU. | |
5635 | ||
5636 | Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables | |
5637 | must be properly initialized prior to calling this service. This function | |
5638 | assumes the current execution mode is 32-bit protected mode. This function is | |
5639 | only available on IA-32. After the 32-bit paging mode is enabled, control is | |
5640 | transferred to the function specified by EntryPoint using the new stack | |
5641 | specified by NewStack and passing in the parameters specified by Context1 and | |
5642 | Context2. Context1 and Context2 are optional and may be NULL. The function | |
5643 | EntryPoint must never return. | |
5644 | ||
5645 | If the current execution mode is not 32-bit protected mode, then ASSERT(). | |
5646 | If EntryPoint is NULL, then ASSERT(). | |
5647 | If NewStack is NULL, then ASSERT(). | |
5648 | ||
5649 | There are a number of constraints that must be followed before calling this | |
5650 | function: | |
5651 | 1) Interrupts must be disabled. | |
5652 | 2) The caller must be in 32-bit protected mode with flat descriptors. This | |
5653 | means all descriptors must have a base of 0 and a limit of 4GB. | |
5654 | 3) CR0 and CR4 must be compatible with 32-bit protected mode with flat | |
5655 | descriptors. | |
5656 | 4) CR3 must point to valid page tables that will be used once the transition | |
5657 | is complete, and those page tables must guarantee that the pages for this | |
5658 | function and the stack are identity mapped. | |
5659 | ||
5660 | @param EntryPoint A pointer to function to call with the new stack after | |
5661 | paging is enabled. | |
5662 | @param Context1 A pointer to the context to pass into the EntryPoint | |
5663 | function as the first parameter after paging is enabled. | |
5664 | @param Context2 A pointer to the context to pass into the EntryPoint | |
5665 | function as the second parameter after paging is enabled. | |
5666 | @param NewStack A pointer to the new stack to use for the EntryPoint | |
5667 | function after paging is enabled. | |
5668 | ||
5669 | **/ | |
5670 | VOID | |
5671 | EFIAPI | |
5672 | AsmEnablePaging32 ( | |
5673 | IN SWITCH_STACK_ENTRY_POINT EntryPoint, | |
5674 | IN VOID *Context1, OPTIONAL | |
5675 | IN VOID *Context2, OPTIONAL | |
5676 | IN VOID *NewStack | |
5677 | ); | |
5678 | ||
d57e9bdc | 5679 | |
d958721a | 5680 | /** |
5681 | Disables the 32-bit paging mode on the CPU. | |
5682 | ||
5683 | Disables the 32-bit paging mode on the CPU and returns to 32-bit protected | |
5684 | mode. This function assumes the current execution mode is 32-paged protected | |
5685 | mode. This function is only available on IA-32. After the 32-bit paging mode | |
5686 | is disabled, control is transferred to the function specified by EntryPoint | |
5687 | using the new stack specified by NewStack and passing in the parameters | |
5688 | specified by Context1 and Context2. Context1 and Context2 are optional and | |
5689 | may be NULL. The function EntryPoint must never return. | |
5690 | ||
5691 | If the current execution mode is not 32-bit paged mode, then ASSERT(). | |
5692 | If EntryPoint is NULL, then ASSERT(). | |
5693 | If NewStack is NULL, then ASSERT(). | |
5694 | ||
5695 | There are a number of constraints that must be followed before calling this | |
5696 | function: | |
5697 | 1) Interrupts must be disabled. | |
5698 | 2) The caller must be in 32-bit paged mode. | |
5699 | 3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode. | |
5700 | 4) CR3 must point to valid page tables that guarantee that the pages for | |
5701 | this function and the stack are identity mapped. | |
5702 | ||
5703 | @param EntryPoint A pointer to function to call with the new stack after | |
5704 | paging is disabled. | |
5705 | @param Context1 A pointer to the context to pass into the EntryPoint | |
5706 | function as the first parameter after paging is disabled. | |
5707 | @param Context2 A pointer to the context to pass into the EntryPoint | |
5708 | function as the second parameter after paging is | |
5709 | disabled. | |
5710 | @param NewStack A pointer to the new stack to use for the EntryPoint | |
5711 | function after paging is disabled. | |
5712 | ||
5713 | **/ | |
5714 | VOID | |
5715 | EFIAPI | |
5716 | AsmDisablePaging32 ( | |
5717 | IN SWITCH_STACK_ENTRY_POINT EntryPoint, | |
5718 | IN VOID *Context1, OPTIONAL | |
5719 | IN VOID *Context2, OPTIONAL | |
5720 | IN VOID *NewStack | |
5721 | ); | |
5722 | ||
d57e9bdc | 5723 | |
d958721a | 5724 | /** |
5725 | Enables the 64-bit paging mode on the CPU. | |
5726 | ||
5727 | Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables | |
5728 | must be properly initialized prior to calling this service. This function | |
5729 | assumes the current execution mode is 32-bit protected mode with flat | |
5730 | descriptors. This function is only available on IA-32. After the 64-bit | |
5731 | paging mode is enabled, control is transferred to the function specified by | |
5732 | EntryPoint using the new stack specified by NewStack and passing in the | |
5733 | parameters specified by Context1 and Context2. Context1 and Context2 are | |
5734 | optional and may be 0. The function EntryPoint must never return. | |
5735 | ||
5736 | If the current execution mode is not 32-bit protected mode with flat | |
5737 | descriptors, then ASSERT(). | |
5738 | If EntryPoint is 0, then ASSERT(). | |
5739 | If NewStack is 0, then ASSERT(). | |
5740 | ||
5741 | @param Cs The 16-bit selector to load in the CS before EntryPoint | |
5742 | is called. The descriptor in the GDT that this selector | |
5743 | references must be setup for long mode. | |
5744 | @param EntryPoint The 64-bit virtual address of the function to call with | |
5745 | the new stack after paging is enabled. | |
5746 | @param Context1 The 64-bit virtual address of the context to pass into | |
5747 | the EntryPoint function as the first parameter after | |
5748 | paging is enabled. | |
5749 | @param Context2 The 64-bit virtual address of the context to pass into | |
5750 | the EntryPoint function as the second parameter after | |
5751 | paging is enabled. | |
5752 | @param NewStack The 64-bit virtual address of the new stack to use for | |
5753 | the EntryPoint function after paging is enabled. | |
5754 | ||
5755 | **/ | |
5756 | VOID | |
5757 | EFIAPI | |
5758 | AsmEnablePaging64 ( | |
5759 | IN UINT16 CodeSelector, | |
5760 | IN UINT64 EntryPoint, | |
5761 | IN UINT64 Context1, OPTIONAL | |
5762 | IN UINT64 Context2, OPTIONAL | |
5763 | IN UINT64 NewStack | |
5764 | ); | |
5765 | ||
d57e9bdc | 5766 | |
d958721a | 5767 | /** |
5768 | Disables the 64-bit paging mode on the CPU. | |
5769 | ||
5770 | Disables the 64-bit paging mode on the CPU and returns to 32-bit protected | |
5771 | mode. This function assumes the current execution mode is 64-paging mode. | |
5772 | This function is only available on X64. After the 64-bit paging mode is | |
5773 | disabled, control is transferred to the function specified by EntryPoint | |
5774 | using the new stack specified by NewStack and passing in the parameters | |
5775 | specified by Context1 and Context2. Context1 and Context2 are optional and | |
5776 | may be 0. The function EntryPoint must never return. | |
5777 | ||
5778 | If the current execution mode is not 64-bit paged mode, then ASSERT(). | |
5779 | If EntryPoint is 0, then ASSERT(). | |
5780 | If NewStack is 0, then ASSERT(). | |
5781 | ||
5782 | @param Cs The 16-bit selector to load in the CS before EntryPoint | |
5783 | is called. The descriptor in the GDT that this selector | |
5784 | references must be setup for 32-bit protected mode. | |
5785 | @param EntryPoint The 64-bit virtual address of the function to call with | |
5786 | the new stack after paging is disabled. | |
5787 | @param Context1 The 64-bit virtual address of the context to pass into | |
5788 | the EntryPoint function as the first parameter after | |
5789 | paging is disabled. | |
5790 | @param Context2 The 64-bit virtual address of the context to pass into | |
5791 | the EntryPoint function as the second parameter after | |
5792 | paging is disabled. | |
5793 | @param NewStack The 64-bit virtual address of the new stack to use for | |
5794 | the EntryPoint function after paging is disabled. | |
5795 | ||
5796 | **/ | |
5797 | VOID | |
5798 | EFIAPI | |
5799 | AsmDisablePaging64 ( | |
5800 | IN UINT16 CodeSelector, | |
5801 | IN UINT32 EntryPoint, | |
5802 | IN UINT32 Context1, OPTIONAL | |
5803 | IN UINT32 Context2, OPTIONAL | |
5804 | IN UINT32 NewStack | |
5805 | ); | |
5806 | ||
d57e9bdc | 5807 | |
d958721a | 5808 | // |
5809 | // 16-bit thunking services | |
5810 | // | |
5811 | ||
5812 | /** | |
5813 | Retrieves the properties for 16-bit thunk functions. | |
5814 | ||
5815 | Computes the size of the buffer and stack below 1MB required to use the | |
5816 | AsmPrepareThunk16(), AsmThunk16() and AsmPrepareAndThunk16() functions. This | |
5817 | buffer size is returned in RealModeBufferSize, and the stack size is returned | |
5818 | in ExtraStackSize. If parameters are passed to the 16-bit real mode code, | |
5819 | then the actual minimum stack size is ExtraStackSize plus the maximum number | |
5820 | of bytes that need to be passed to the 16-bit real mode code. | |
5821 | ||
5822 | If RealModeBufferSize is NULL, then ASSERT(). | |
5823 | If ExtraStackSize is NULL, then ASSERT(). | |
5824 | ||
5825 | @param RealModeBufferSize A pointer to the size of the buffer below 1MB | |
5826 | required to use the 16-bit thunk functions. | |
5827 | @param ExtraStackSize A pointer to the extra size of stack below 1MB | |
5828 | that the 16-bit thunk functions require for | |
5829 | temporary storage in the transition to and from | |
5830 | 16-bit real mode. | |
5831 | ||
5832 | **/ | |
5833 | VOID | |
5834 | EFIAPI | |
5835 | AsmGetThunk16Properties ( | |
5836 | OUT UINT32 *RealModeBufferSize, | |
5837 | OUT UINT32 *ExtraStackSize | |
5838 | ); | |
5839 | ||
d57e9bdc | 5840 | |
d958721a | 5841 | /** |
5842 | Prepares all structures a code required to use AsmThunk16(). | |
5843 | ||
5844 | Prepares all structures and code required to use AsmThunk16(). | |
5845 | ||
5846 | If ThunkContext is NULL, then ASSERT(). | |
5847 | ||
5848 | @param ThunkContext A pointer to the context structure that describes the | |
5849 | 16-bit real mode code to call. | |
5850 | ||
5851 | **/ | |
5852 | VOID | |
5853 | EFIAPI | |
5854 | AsmPrepareThunk16 ( | |
5855 | OUT THUNK_CONTEXT *ThunkContext | |
5856 | ); | |
5857 | ||
d57e9bdc | 5858 | |
d958721a | 5859 | /** |
5860 | Transfers control to a 16-bit real mode entry point and returns the results. | |
5861 | ||
5862 | Transfers control to a 16-bit real mode entry point and returns the results. | |
5863 | AsmPrepareThunk16() must be called with ThunkContext before this function is | |
5864 | used. | |
5865 | ||
5866 | If ThunkContext is NULL, then ASSERT(). | |
5867 | If AsmPrepareThunk16() was not previously called with ThunkContext, then ASSERT(). | |
5868 | ||
5869 | @param ThunkContext A pointer to the context structure that describes the | |
5870 | 16-bit real mode code to call. | |
5871 | ||
5872 | **/ | |
5873 | VOID | |
5874 | EFIAPI | |
5875 | AsmThunk16 ( | |
5876 | IN OUT THUNK_CONTEXT *ThunkContext | |
5877 | ); | |
5878 | ||
d57e9bdc | 5879 | |
d958721a | 5880 | /** |
5881 | Prepares all structures and code for a 16-bit real mode thunk, transfers | |
5882 | control to a 16-bit real mode entry point, and returns the results. | |
5883 | ||
5884 | Prepares all structures and code for a 16-bit real mode thunk, transfers | |
5885 | control to a 16-bit real mode entry point, and returns the results. If the | |
5886 | caller only need to perform a single 16-bit real mode thunk, then this | |
5887 | service should be used. If the caller intends to make more than one 16-bit | |
5888 | real mode thunk, then it is more efficient if AsmPrepareThunk16() is called | |
5889 | once and AsmThunk16() can be called for each 16-bit real mode thunk. | |
5890 | ||
5891 | If ThunkContext is NULL, then ASSERT(). | |
5892 | ||
5893 | @param ThunkContext A pointer to the context structure that describes the | |
5894 | 16-bit real mode code to call. | |
5895 | ||
5896 | **/ | |
5897 | VOID | |
5898 | EFIAPI | |
5899 | AsmPrepareAndThunk16 ( | |
5900 | IN OUT THUNK_CONTEXT *ThunkContext | |
5901 | ); | |
5902 | ||
d57e9bdc | 5903 | |
d958721a | 5904 | typedef struct { |
5905 | UINT64 Status; | |
5906 | UINT64 r9; | |
5907 | UINT64 r10; | |
5908 | UINT64 r11; | |
5909 | } PAL_PROC_RETURN; | |
5910 | ||
5911 | // | |
5912 | // IPF Specific functions | |
5913 | // | |
5914 | ||
5915 | ||
5916 | /** | |
5917 | Performs a PAL call using static calling convention. | |
5918 | ||
5919 | An internal function to perform a PAL call using static calling convention. | |
5920 | ||
5921 | @param PalEntryPoint The entry point address of PAL. The address in ar.kr5 | |
5922 | would be used if this parameter were NULL on input. | |
5923 | @param Arg1 The first argument of a PAL call. | |
5924 | @param Arg1 The second argument of a PAL call. | |
5925 | @param Arg1 The third argument of a PAL call. | |
5926 | @param Arg1 The fourth argument of a PAL call. | |
5927 | ||
5928 | @return The values returned in r8, r9, r10 and r11. | |
5929 | ||
5930 | **/ | |
5931 | PAL_PROC_RETURN | |
5932 | PalCallStatic ( | |
5933 | IN CONST VOID *PalEntryPoint, | |
5934 | IN UINT64 Arg1, | |
5935 | IN UINT64 Arg2, | |
5936 | IN UINT64 Arg3, | |
5937 | IN UINT64 Arg4 | |
5938 | ); | |
5939 | ||
5940 | ||
5941 | /** | |
5942 | Returns the current value of ar.itc. | |
5943 | ||
5944 | An internal function to return the current value of ar.itc, which is the | |
5945 | timer tick on IPF. | |
5946 | ||
5947 | @return The currect value of ar.itc | |
5948 | ||
5949 | **/ | |
5950 | INT64 | |
5951 | IpfReadItc ( | |
5952 | VOID | |
5953 | ); | |
5954 | ||
5955 | ||
5956 | /** | |
cb41bea7 | 5957 | Flush a range of cache lines in the cache coherency domain of the calling |
d958721a | 5958 | CPU. |
5959 | ||
cb41bea7 | 5960 | Invalidates the cache lines specified by Address and Length. If Address is |
5961 | not aligned on a cache line boundary, then entire cache line containing | |
5962 | Address is invalidated. If Address + Length is not aligned on a cache line | |
d958721a | 5963 | boundary, then the entire instruction cache line containing Address + Length |
cb41bea7 | 5964 | -1 is invalidated. This function may choose to invalidate the entire |
5965 | instruction cache if that is more efficient than invalidating the specified | |
5966 | range. If Length is 0, the no instruction cache lines are invalidated. | |
d958721a | 5967 | Address is returned. |
5968 | ||
5969 | If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). | |
5970 | ||
cb41bea7 | 5971 | @param Address The base address of the instruction lines to invalidate. If |
d958721a | 5972 | the CPU is in a physical addressing mode, then Address is a |
5973 | physical address. If the CPU is in a virtual addressing mode, | |
5974 | then Address is a virtual address. | |
5975 | ||
5976 | @param Length The number of bytes to invalidate from the instruction cache. | |
5977 | ||
5978 | @return Address | |
5979 | ||
5980 | **/ | |
5981 | VOID * | |
5982 | EFIAPI | |
5983 | IpfFlushCacheRange ( | |
5984 | IN VOID *Address, | |
5985 | IN UINTN Length | |
5986 | ); | |
5987 | ||
d57e9bdc | 5988 | |
d958721a | 5989 | #endif |
5990 |