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e1f414b6 | 1 | /** @file\r |
2 | I/O Library. This file has compiler specifics for Microsft C as there is no\r | |
3 | ANSI C standard for doing IO.\r | |
4 | \r | |
5 | MSC - uses intrinsic functions and the optimize will remove the function call\r | |
6 | overhead.\r | |
7 | \r | |
8 | We don't advocate putting compiler specifics in libraries or drivers but there\r | |
9 | is no other way to make this work.\r | |
10 | \r | |
11 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r | |
12 | All rights reserved. This program and the accompanying materials\r | |
13 | are licensed and made available under the terms and conditions of the BSD License\r | |
14 | which accompanies this distribution. The full text of the license may be found at\r | |
15 | http://opensource.org/licenses/bsd-license.php\r | |
16 | \r | |
17 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
18 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
19 | \r | |
e1f414b6 | 20 | **/\r |
21 | \r | |
22 | \r | |
23 | //\r | |
24 | // Include common header file for this module.\r | |
25 | //\r | |
f734a10a | 26 | #include "BaseIoLibIntrinsicInternal.h"\r |
e1f414b6 | 27 | \r |
28 | //\r | |
42eedea9 | 29 | // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r |
e1f414b6 | 30 | //\r |
42eedea9 | 31 | \r |
e1f414b6 | 32 | int _inp (unsigned short port);\r |
33 | unsigned short _inpw (unsigned short port);\r | |
34 | unsigned long _inpd (unsigned short port);\r | |
35 | int _outp (unsigned short port, int databyte );\r | |
36 | unsigned short _outpw (unsigned short port, unsigned short dataword );\r | |
37 | unsigned long _outpd (unsigned short port, unsigned long dataword );\r | |
38 | void _ReadWriteBarrier (void);\r | |
39 | \r | |
40 | #pragma intrinsic(_inp)\r | |
41 | #pragma intrinsic(_inpw)\r | |
42 | #pragma intrinsic(_inpd)\r | |
43 | #pragma intrinsic(_outp)\r | |
44 | #pragma intrinsic(_outpw)\r | |
45 | #pragma intrinsic(_outpd)\r | |
46 | #pragma intrinsic(_ReadWriteBarrier)\r | |
986352be | 47 | \r |
e1f414b6 | 48 | //\r |
49 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r | |
50 | // in the call. This is only a hint to the compiler and does emit code.\r | |
51 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r | |
52 | // locally and did not affect functions up the call tree. In Visual C++\r | |
53 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r | |
54 | //\r | |
55 | \r | |
56 | /**\r | |
57 | Reads an 8-bit I/O port.\r | |
58 | \r | |
59 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r | |
60 | This function must guarantee that all I/O read and write operations are\r | |
61 | serialized.\r | |
62 | \r | |
63 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
64 | \r | |
65 | @param Port The I/O port to read.\r | |
66 | \r | |
38bbd3d9 | 67 | @return The value read from Port.\r |
e1f414b6 | 68 | \r |
69 | **/\r | |
70 | UINT8\r | |
71 | EFIAPI\r | |
72 | IoRead8 (\r | |
73 | IN UINTN Port\r | |
74 | )\r | |
75 | {\r | |
76 | UINT8 Value;\r | |
77 | \r | |
78 | _ReadWriteBarrier ();\r | |
79 | Value = (UINT8)_inp ((UINT16)Port);\r | |
80 | _ReadWriteBarrier ();\r | |
81 | return Value;\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Writes an 8-bit I/O port.\r | |
86 | \r | |
87 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r | |
88 | and returns Value. This function must guarantee that all I/O read and write\r | |
89 | operations are serialized.\r | |
90 | \r | |
91 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
92 | \r | |
93 | @param Port The I/O port to write.\r | |
94 | @param Value The value to write to the I/O port.\r | |
95 | \r | |
96 | @return The value written the I/O port.\r | |
97 | \r | |
98 | **/\r | |
99 | UINT8\r | |
100 | EFIAPI\r | |
101 | IoWrite8 (\r | |
102 | IN UINTN Port,\r | |
103 | IN UINT8 Value\r | |
104 | )\r | |
105 | {\r | |
106 | _ReadWriteBarrier ();\r | |
107 | (UINT8)_outp ((UINT16)Port, Value);\r | |
108 | _ReadWriteBarrier ();\r | |
109 | return Value;\r | |
110 | }\r | |
111 | \r | |
112 | /**\r | |
113 | Reads a 16-bit I/O port.\r | |
114 | \r | |
115 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r | |
116 | This function must guarantee that all I/O read and write operations are\r | |
117 | serialized.\r | |
118 | \r | |
119 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
120 | \r | |
121 | @param Port The I/O port to read.\r | |
122 | \r | |
38bbd3d9 | 123 | @return The value read from Port.\r |
e1f414b6 | 124 | \r |
125 | **/\r | |
126 | UINT16\r | |
127 | EFIAPI\r | |
128 | IoRead16 (\r | |
129 | IN UINTN Port\r | |
130 | )\r | |
131 | {\r | |
132 | UINT16 Value;\r | |
133 | \r | |
134 | ASSERT ((Port & 1) == 0);\r | |
135 | _ReadWriteBarrier ();\r | |
136 | Value = _inpw ((UINT16)Port);\r | |
137 | _ReadWriteBarrier ();\r | |
138 | return Value;\r | |
139 | }\r | |
140 | \r | |
141 | /**\r | |
142 | Writes a 16-bit I/O port.\r | |
143 | \r | |
144 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r | |
145 | and returns Value. This function must guarantee that all I/O read and write\r | |
146 | operations are serialized.\r | |
147 | \r | |
148 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
149 | \r | |
150 | @param Port The I/O port to write.\r | |
151 | @param Value The value to write to the I/O port.\r | |
152 | \r | |
153 | @return The value written the I/O port.\r | |
154 | \r | |
155 | **/\r | |
156 | UINT16\r | |
157 | EFIAPI\r | |
158 | IoWrite16 (\r | |
159 | IN UINTN Port,\r | |
160 | IN UINT16 Value\r | |
161 | )\r | |
162 | {\r | |
163 | ASSERT ((Port & 1) == 0);\r | |
164 | _ReadWriteBarrier ();\r | |
165 | _outpw ((UINT16)Port, Value);\r | |
166 | _ReadWriteBarrier ();\r | |
167 | return Value;\r | |
168 | }\r | |
169 | \r | |
170 | /**\r | |
171 | Reads a 32-bit I/O port.\r | |
172 | \r | |
173 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r | |
174 | This function must guarantee that all I/O read and write operations are\r | |
175 | serialized.\r | |
176 | \r | |
177 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
178 | \r | |
179 | @param Port The I/O port to read.\r | |
180 | \r | |
38bbd3d9 | 181 | @return The value read from Port.\r |
e1f414b6 | 182 | \r |
183 | **/\r | |
184 | UINT32\r | |
185 | EFIAPI\r | |
186 | IoRead32 (\r | |
187 | IN UINTN Port\r | |
188 | )\r | |
189 | {\r | |
190 | UINT32 Value;\r | |
191 | \r | |
192 | ASSERT ((Port & 3) == 0);\r | |
193 | _ReadWriteBarrier ();\r | |
194 | Value = _inpd ((UINT16)Port);\r | |
195 | _ReadWriteBarrier ();\r | |
196 | return Value;\r | |
197 | }\r | |
198 | \r | |
199 | /**\r | |
200 | Writes a 32-bit I/O port.\r | |
201 | \r | |
202 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r | |
203 | and returns Value. This function must guarantee that all I/O read and write\r | |
204 | operations are serialized.\r | |
205 | \r | |
206 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
207 | \r | |
208 | @param Port The I/O port to write.\r | |
209 | @param Value The value to write to the I/O port.\r | |
210 | \r | |
211 | @return The value written the I/O port.\r | |
212 | \r | |
213 | **/\r | |
214 | UINT32\r | |
215 | EFIAPI\r | |
216 | IoWrite32 (\r | |
217 | IN UINTN Port,\r | |
218 | IN UINT32 Value\r | |
219 | )\r | |
220 | {\r | |
221 | ASSERT ((Port & 3) == 0);\r | |
222 | _ReadWriteBarrier ();\r | |
223 | _outpd ((UINT16)Port, Value);\r | |
224 | _ReadWriteBarrier ();\r | |
225 | return Value;\r | |
226 | }\r | |
227 | \r | |
228 | \r | |
229 | /**\r | |
230 | Reads an 8-bit MMIO register.\r | |
231 | \r | |
232 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
233 | returned. This function must guarantee that all MMIO read and write\r | |
234 | operations are serialized.\r | |
235 | \r | |
236 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
237 | \r | |
238 | @param Address The MMIO register to read.\r | |
239 | \r | |
38bbd3d9 | 240 | @return The value read from Address.\r |
e1f414b6 | 241 | \r |
242 | **/\r | |
243 | UINT8\r | |
244 | EFIAPI\r | |
245 | MmioRead8 (\r | |
246 | IN UINTN Address\r | |
247 | )\r | |
248 | {\r | |
249 | UINT8 Value;\r | |
250 | \r | |
251 | Value = *(volatile UINT8*)Address;\r | |
252 | return Value;\r | |
253 | }\r | |
254 | \r | |
255 | /**\r | |
256 | Writes an 8-bit MMIO register.\r | |
257 | \r | |
258 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
259 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
260 | and write operations are serialized.\r | |
261 | \r | |
262 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
263 | \r | |
264 | @param Address The MMIO register to write.\r | |
265 | @param Value The value to write to the MMIO register.\r | |
38bbd3d9 | 266 | \r |
267 | @return The value written to the Mmio. It equals to the input\r | |
268 | Value instead of the actual value read back from the\r | |
269 | Mmio.\r | |
270 | \r | |
e1f414b6 | 271 | **/\r |
272 | UINT8\r | |
273 | EFIAPI\r | |
274 | MmioWrite8 (\r | |
275 | IN UINTN Address,\r | |
276 | IN UINT8 Value\r | |
277 | )\r | |
278 | {\r | |
279 | return *(volatile UINT8*)Address = Value;\r | |
280 | }\r | |
281 | \r | |
282 | /**\r | |
283 | Reads a 16-bit MMIO register.\r | |
284 | \r | |
285 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
286 | returned. This function must guarantee that all MMIO read and write\r | |
287 | operations are serialized.\r | |
288 | \r | |
289 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
290 | \r | |
291 | @param Address The MMIO register to read.\r | |
292 | \r | |
38bbd3d9 | 293 | @return The value read from Address.\r |
e1f414b6 | 294 | \r |
295 | **/\r | |
296 | UINT16\r | |
297 | EFIAPI\r | |
298 | MmioRead16 (\r | |
299 | IN UINTN Address\r | |
300 | )\r | |
301 | {\r | |
302 | UINT16 Value;\r | |
303 | \r | |
304 | ASSERT ((Address & 1) == 0);\r | |
305 | Value = *(volatile UINT16*)Address;\r | |
306 | return Value;\r | |
307 | }\r | |
308 | \r | |
309 | /**\r | |
310 | Writes a 16-bit MMIO register.\r | |
311 | \r | |
312 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
313 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
314 | and write operations are serialized.\r | |
315 | \r | |
316 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
317 | \r | |
318 | @param Address The MMIO register to write.\r | |
319 | @param Value The value to write to the MMIO register.\r | |
38bbd3d9 | 320 | \r |
321 | @return The value read from the Mmio after wrote specified\r | |
322 | Value.\r | |
e1f414b6 | 323 | \r |
324 | **/\r | |
325 | UINT16\r | |
326 | EFIAPI\r | |
327 | MmioWrite16 (\r | |
328 | IN UINTN Address,\r | |
329 | IN UINT16 Value\r | |
330 | )\r | |
331 | {\r | |
332 | ASSERT ((Address & 1) == 0);\r | |
333 | return *(volatile UINT16*)Address = Value;\r | |
334 | }\r | |
335 | \r | |
336 | /**\r | |
337 | Reads a 32-bit MMIO register.\r | |
338 | \r | |
339 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
340 | returned. This function must guarantee that all MMIO read and write\r | |
341 | operations are serialized.\r | |
342 | \r | |
343 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
344 | \r | |
345 | @param Address The MMIO register to read.\r | |
346 | \r | |
38bbd3d9 | 347 | @return The value read from Address.\r |
e1f414b6 | 348 | \r |
349 | **/\r | |
350 | UINT32\r | |
351 | EFIAPI\r | |
352 | MmioRead32 (\r | |
353 | IN UINTN Address\r | |
354 | )\r | |
355 | {\r | |
356 | UINT32 Value;\r | |
357 | \r | |
358 | ASSERT ((Address & 3) == 0);\r | |
359 | Value = *(volatile UINT32*)Address;\r | |
360 | return Value;\r | |
361 | }\r | |
362 | \r | |
363 | /**\r | |
364 | Writes a 32-bit MMIO register.\r | |
365 | \r | |
366 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
367 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
368 | and write operations are serialized.\r | |
369 | \r | |
370 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
371 | \r | |
372 | @param Address The MMIO register to write.\r | |
373 | @param Value The value to write to the MMIO register.\r | |
38bbd3d9 | 374 | \r |
375 | @return The value written to the Mmio. It equals to the input\r | |
376 | Value instead of the actual value read back from the\r | |
377 | Mmio.\r | |
e1f414b6 | 378 | \r |
379 | **/\r | |
380 | UINT32\r | |
381 | EFIAPI\r | |
382 | MmioWrite32 (\r | |
383 | IN UINTN Address,\r | |
384 | IN UINT32 Value\r | |
385 | )\r | |
386 | {\r | |
387 | ASSERT ((Address & 3) == 0);\r | |
388 | return *(volatile UINT32*)Address = Value;\r | |
389 | }\r | |
390 | \r | |
391 | /**\r | |
392 | Reads a 64-bit MMIO register.\r | |
393 | \r | |
394 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
395 | returned. This function must guarantee that all MMIO read and write\r | |
396 | operations are serialized.\r | |
397 | \r | |
398 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
399 | \r | |
400 | @param Address The MMIO register to read.\r | |
401 | \r | |
38bbd3d9 | 402 | @return The value read from Address.\r |
e1f414b6 | 403 | \r |
404 | **/\r | |
405 | UINT64\r | |
406 | EFIAPI\r | |
407 | MmioRead64 (\r | |
408 | IN UINTN Address\r | |
409 | )\r | |
410 | {\r | |
411 | UINT64 Value;\r | |
412 | \r | |
413 | ASSERT ((Address & 7) == 0);\r | |
414 | Value = *(volatile UINT64*)Address;\r | |
415 | return Value;\r | |
416 | }\r | |
417 | \r | |
418 | /**\r | |
419 | Writes a 64-bit MMIO register.\r | |
420 | \r | |
421 | Writes the 64-bit MMIO register specified by Address with the value specified\r | |
422 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
423 | and write operations are serialized.\r | |
424 | \r | |
425 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
426 | \r | |
427 | @param Address The MMIO register to write.\r | |
428 | @param Value The value to write to the MMIO register.\r | |
429 | \r | |
38bbd3d9 | 430 | @return The value written to the Mmio. It equals to the input\r |
431 | Value instead of the actual value read back from the\r | |
432 | Mmio.\r | |
433 | \r | |
e1f414b6 | 434 | **/\r |
435 | UINT64\r | |
436 | EFIAPI\r | |
437 | MmioWrite64 (\r | |
438 | IN UINTN Address,\r | |
439 | IN UINT64 Value\r | |
440 | )\r | |
441 | {\r | |
442 | ASSERT ((Address & 7) == 0);\r | |
443 | return *(volatile UINT64*)Address = Value;\r | |
444 | }\r | |
445 | \r |