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a47463f2 | 1 | /** @file\r |
2 | CPU DXE Module.\r | |
3 | \r | |
e41aad15 | 4 | Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>\r |
01a1c0fc | 5 | This program and the accompanying materials\r |
a47463f2 | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "CpuDxe.h"\r | |
16 | \r | |
17 | //\r | |
18 | // Global Variables\r | |
19 | //\r | |
a47463f2 | 20 | BOOLEAN InterruptState = FALSE;\r |
21 | EFI_HANDLE mCpuHandle = NULL;\r | |
22 | BOOLEAN mIsFlushingGCD;\r | |
a47463f2 | 23 | UINT64 mValidMtrrAddressMask = MTRR_LIB_CACHE_VALID_ADDRESS;\r |
24 | UINT64 mValidMtrrBitsMask = MTRR_LIB_MSR_VALID_MASK;\r | |
25 | \r | |
26 | FIXED_MTRR mFixedMtrrTable[] = {\r | |
27 | {\r | |
28 | MTRR_LIB_IA32_MTRR_FIX64K_00000,\r | |
29 | 0,\r | |
30 | 0x10000\r | |
31 | },\r | |
32 | {\r | |
33 | MTRR_LIB_IA32_MTRR_FIX16K_80000,\r | |
34 | 0x80000,\r | |
35 | 0x4000\r | |
36 | },\r | |
37 | {\r | |
38 | MTRR_LIB_IA32_MTRR_FIX16K_A0000,\r | |
39 | 0xA0000,\r | |
40 | 0x4000\r | |
41 | },\r | |
42 | {\r | |
43 | MTRR_LIB_IA32_MTRR_FIX4K_C0000,\r | |
44 | 0xC0000,\r | |
45 | 0x1000\r | |
46 | },\r | |
47 | {\r | |
48 | MTRR_LIB_IA32_MTRR_FIX4K_C8000,\r | |
49 | 0xC8000,\r | |
50 | 0x1000\r | |
51 | },\r | |
52 | {\r | |
53 | MTRR_LIB_IA32_MTRR_FIX4K_D0000,\r | |
54 | 0xD0000,\r | |
55 | 0x1000\r | |
56 | },\r | |
57 | {\r | |
58 | MTRR_LIB_IA32_MTRR_FIX4K_D8000,\r | |
59 | 0xD8000,\r | |
60 | 0x1000\r | |
61 | },\r | |
62 | {\r | |
63 | MTRR_LIB_IA32_MTRR_FIX4K_E0000,\r | |
64 | 0xE0000,\r | |
65 | 0x1000\r | |
66 | },\r | |
67 | {\r | |
68 | MTRR_LIB_IA32_MTRR_FIX4K_E8000,\r | |
69 | 0xE8000,\r | |
70 | 0x1000\r | |
71 | },\r | |
72 | {\r | |
73 | MTRR_LIB_IA32_MTRR_FIX4K_F0000,\r | |
74 | 0xF0000,\r | |
75 | 0x1000\r | |
76 | },\r | |
77 | {\r | |
78 | MTRR_LIB_IA32_MTRR_FIX4K_F8000,\r | |
79 | 0xF8000,\r | |
80 | 0x1000\r | |
81 | },\r | |
82 | };\r | |
83 | \r | |
84 | \r | |
85 | EFI_CPU_ARCH_PROTOCOL gCpu = {\r | |
86 | CpuFlushCpuDataCache,\r | |
87 | CpuEnableInterrupt,\r | |
88 | CpuDisableInterrupt,\r | |
89 | CpuGetInterruptState,\r | |
90 | CpuInit,\r | |
91 | CpuRegisterInterruptHandler,\r | |
92 | CpuGetTimerValue,\r | |
93 | CpuSetMemoryAttributes,\r | |
94 | 1, // NumberOfTimers\r | |
95 | 4 // DmaBufferAlignment\r | |
96 | };\r | |
97 | \r | |
a47463f2 | 98 | //\r |
99 | // CPU Arch Protocol Functions\r | |
100 | //\r | |
101 | \r | |
a47463f2 | 102 | /**\r |
103 | Flush CPU data cache. If the instruction cache is fully coherent\r | |
104 | with all DMA operations then function can just return EFI_SUCCESS.\r | |
105 | \r | |
106 | @param This Protocol instance structure\r | |
107 | @param Start Physical address to start flushing from.\r | |
108 | @param Length Number of bytes to flush. Round up to chipset\r | |
109 | granularity.\r | |
110 | @param FlushType Specifies the type of flush operation to perform.\r | |
111 | \r | |
112 | @retval EFI_SUCCESS If cache was flushed\r | |
113 | @retval EFI_UNSUPPORTED If flush type is not supported.\r | |
114 | @retval EFI_DEVICE_ERROR If requested range could not be flushed.\r | |
115 | \r | |
116 | **/\r | |
117 | EFI_STATUS\r | |
118 | EFIAPI\r | |
119 | CpuFlushCpuDataCache (\r | |
120 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
121 | IN EFI_PHYSICAL_ADDRESS Start,\r | |
122 | IN UINT64 Length,\r | |
123 | IN EFI_CPU_FLUSH_TYPE FlushType\r | |
124 | )\r | |
125 | {\r | |
126 | if (FlushType == EfiCpuFlushTypeWriteBackInvalidate) {\r | |
127 | AsmWbinvd ();\r | |
128 | return EFI_SUCCESS;\r | |
129 | } else if (FlushType == EfiCpuFlushTypeInvalidate) {\r | |
130 | AsmInvd ();\r | |
131 | return EFI_SUCCESS;\r | |
132 | } else {\r | |
133 | return EFI_UNSUPPORTED;\r | |
134 | }\r | |
135 | }\r | |
136 | \r | |
137 | \r | |
138 | /**\r | |
139 | Enables CPU interrupts.\r | |
140 | \r | |
141 | @param This Protocol instance structure\r | |
142 | \r | |
143 | @retval EFI_SUCCESS If interrupts were enabled in the CPU\r | |
144 | @retval EFI_DEVICE_ERROR If interrupts could not be enabled on the CPU.\r | |
145 | \r | |
146 | **/\r | |
147 | EFI_STATUS\r | |
148 | EFIAPI\r | |
149 | CpuEnableInterrupt (\r | |
150 | IN EFI_CPU_ARCH_PROTOCOL *This\r | |
151 | )\r | |
152 | {\r | |
153 | EnableInterrupts ();\r | |
154 | \r | |
155 | InterruptState = TRUE;\r | |
156 | return EFI_SUCCESS;\r | |
157 | }\r | |
158 | \r | |
159 | \r | |
160 | /**\r | |
161 | Disables CPU interrupts.\r | |
162 | \r | |
163 | @param This Protocol instance structure\r | |
164 | \r | |
165 | @retval EFI_SUCCESS If interrupts were disabled in the CPU.\r | |
166 | @retval EFI_DEVICE_ERROR If interrupts could not be disabled on the CPU.\r | |
167 | \r | |
168 | **/\r | |
169 | EFI_STATUS\r | |
170 | EFIAPI\r | |
171 | CpuDisableInterrupt (\r | |
172 | IN EFI_CPU_ARCH_PROTOCOL *This\r | |
173 | )\r | |
174 | {\r | |
175 | DisableInterrupts ();\r | |
176 | \r | |
177 | InterruptState = FALSE;\r | |
178 | return EFI_SUCCESS;\r | |
179 | }\r | |
180 | \r | |
181 | \r | |
182 | /**\r | |
183 | Return the state of interrupts.\r | |
184 | \r | |
185 | @param This Protocol instance structure\r | |
186 | @param State Pointer to the CPU's current interrupt state\r | |
187 | \r | |
188 | @retval EFI_SUCCESS If interrupts were disabled in the CPU.\r | |
189 | @retval EFI_INVALID_PARAMETER State is NULL.\r | |
190 | \r | |
191 | **/\r | |
192 | EFI_STATUS\r | |
193 | EFIAPI\r | |
194 | CpuGetInterruptState (\r | |
195 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
196 | OUT BOOLEAN *State\r | |
197 | )\r | |
198 | {\r | |
199 | if (State == NULL) {\r | |
200 | return EFI_INVALID_PARAMETER;\r | |
201 | }\r | |
202 | \r | |
203 | *State = InterruptState;\r | |
204 | return EFI_SUCCESS;\r | |
205 | }\r | |
206 | \r | |
207 | \r | |
208 | /**\r | |
209 | Generates an INIT to the CPU.\r | |
210 | \r | |
211 | @param This Protocol instance structure\r | |
212 | @param InitType Type of CPU INIT to perform\r | |
213 | \r | |
214 | @retval EFI_SUCCESS If CPU INIT occurred. This value should never be\r | |
215 | seen.\r | |
216 | @retval EFI_DEVICE_ERROR If CPU INIT failed.\r | |
217 | @retval EFI_UNSUPPORTED Requested type of CPU INIT not supported.\r | |
218 | \r | |
219 | **/\r | |
220 | EFI_STATUS\r | |
221 | EFIAPI\r | |
222 | CpuInit (\r | |
223 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
224 | IN EFI_CPU_INIT_TYPE InitType\r | |
225 | )\r | |
226 | {\r | |
227 | return EFI_UNSUPPORTED;\r | |
228 | }\r | |
229 | \r | |
230 | \r | |
231 | /**\r | |
232 | Registers a function to be called from the CPU interrupt handler.\r | |
233 | \r | |
234 | @param This Protocol instance structure\r | |
235 | @param InterruptType Defines which interrupt to hook. IA-32\r | |
236 | valid range is 0x00 through 0xFF\r | |
237 | @param InterruptHandler A pointer to a function of type\r | |
238 | EFI_CPU_INTERRUPT_HANDLER that is called\r | |
239 | when a processor interrupt occurs. A null\r | |
240 | pointer is an error condition.\r | |
241 | \r | |
242 | @retval EFI_SUCCESS If handler installed or uninstalled.\r | |
243 | @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler\r | |
244 | for InterruptType was previously installed.\r | |
245 | @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for\r | |
246 | InterruptType was not previously installed.\r | |
247 | @retval EFI_UNSUPPORTED The interrupt specified by InterruptType\r | |
248 | is not supported.\r | |
249 | \r | |
250 | **/\r | |
251 | EFI_STATUS\r | |
252 | EFIAPI\r | |
253 | CpuRegisterInterruptHandler (\r | |
254 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
255 | IN EFI_EXCEPTION_TYPE InterruptType,\r | |
256 | IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r | |
257 | )\r | |
258 | {\r | |
e41aad15 | 259 | return RegisterCpuInterruptHandler (InterruptType, InterruptHandler);\r |
a47463f2 | 260 | }\r |
261 | \r | |
262 | \r | |
263 | /**\r | |
264 | Returns a timer value from one of the CPU's internal timers. There is no\r | |
265 | inherent time interval between ticks but is a function of the CPU frequency.\r | |
266 | \r | |
267 | @param This - Protocol instance structure.\r | |
268 | @param TimerIndex - Specifies which CPU timer is requested.\r | |
269 | @param TimerValue - Pointer to the returned timer value.\r | |
270 | @param TimerPeriod - A pointer to the amount of time that passes\r | |
271 | in femtoseconds (10-15) for each increment\r | |
272 | of TimerValue. If TimerValue does not\r | |
273 | increment at a predictable rate, then 0 is\r | |
274 | returned. The amount of time that has\r | |
275 | passed between two calls to GetTimerValue()\r | |
276 | can be calculated with the formula\r | |
277 | (TimerValue2 - TimerValue1) * TimerPeriod.\r | |
278 | This parameter is optional and may be NULL.\r | |
279 | \r | |
280 | @retval EFI_SUCCESS - If the CPU timer count was returned.\r | |
281 | @retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.\r | |
282 | @retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.\r | |
283 | @retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.\r | |
284 | \r | |
285 | **/\r | |
286 | EFI_STATUS\r | |
287 | EFIAPI\r | |
288 | CpuGetTimerValue (\r | |
289 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
290 | IN UINT32 TimerIndex,\r | |
291 | OUT UINT64 *TimerValue,\r | |
292 | OUT UINT64 *TimerPeriod OPTIONAL\r | |
293 | )\r | |
294 | {\r | |
295 | if (TimerValue == NULL) {\r | |
296 | return EFI_INVALID_PARAMETER;\r | |
297 | }\r | |
298 | \r | |
299 | if (TimerIndex != 0) {\r | |
300 | return EFI_INVALID_PARAMETER;\r | |
301 | }\r | |
302 | \r | |
303 | *TimerValue = AsmReadTsc ();\r | |
304 | \r | |
305 | if (TimerPeriod != NULL) {\r | |
306 | //\r | |
307 | // BugBug: Hard coded. Don't know how to do this generically\r | |
308 | //\r | |
309 | *TimerPeriod = 1000000000;\r | |
310 | }\r | |
311 | \r | |
312 | return EFI_SUCCESS;\r | |
313 | }\r | |
314 | \r | |
315 | \r | |
316 | /**\r | |
4ec21e8b | 317 | Implementation of SetMemoryAttributes() service of CPU Architecture Protocol.\r |
318 | \r | |
319 | This function modifies the attributes for the memory region specified by BaseAddress and\r | |
320 | Length from their current attributes to the attributes specified by Attributes.\r | |
321 | \r | |
322 | @param This The EFI_CPU_ARCH_PROTOCOL instance.\r | |
323 | @param BaseAddress The physical address that is the start address of a memory region.\r | |
324 | @param Length The size in bytes of the memory region.\r | |
325 | @param Attributes The bit mask of attributes to set for the memory region.\r | |
326 | \r | |
327 | @retval EFI_SUCCESS The attributes were set for the memory region.\r | |
328 | @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r | |
329 | BaseAddress and Length cannot be modified.\r | |
330 | @retval EFI_INVALID_PARAMETER Length is zero.\r | |
331 | Attributes specified an illegal combination of attributes that\r | |
332 | cannot be set together.\r | |
333 | @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r | |
334 | the memory resource range.\r | |
335 | @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r | |
336 | resource range specified by BaseAddress and Length.\r | |
337 | The bit mask of attributes is not support for the memory resource\r | |
338 | range specified by BaseAddress and Length.\r | |
a47463f2 | 339 | \r |
340 | **/\r | |
341 | EFI_STATUS\r | |
342 | EFIAPI\r | |
343 | CpuSetMemoryAttributes (\r | |
344 | IN EFI_CPU_ARCH_PROTOCOL *This,\r | |
345 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
346 | IN UINT64 Length,\r | |
347 | IN UINT64 Attributes\r | |
348 | )\r | |
349 | {\r | |
350 | RETURN_STATUS Status;\r | |
351 | MTRR_MEMORY_CACHE_TYPE CacheType;\r | |
352 | \r | |
947a573a | 353 | if (!IsMtrrSupported ()) {\r |
354 | return EFI_UNSUPPORTED;\r | |
355 | }\r | |
356 | \r | |
a47463f2 | 357 | //\r |
358 | // If this function is called because GCD SetMemorySpaceAttributes () is called\r | |
359 | // by RefreshGcdMemoryAttributes (), then we are just synchronzing GCD memory\r | |
360 | // map with MTRR values. So there is no need to modify MTRRs, just return immediately\r | |
361 | // to avoid unnecessary computing.\r | |
362 | //\r | |
363 | if (mIsFlushingGCD) {\r | |
79aca636 SEHM |
364 | DEBUG((EFI_D_INFO, " Flushing GCD\n"));\r |
365 | return EFI_SUCCESS;\r | |
366 | }\r | |
a47463f2 | 367 | \r |
368 | switch (Attributes) {\r | |
369 | case EFI_MEMORY_UC:\r | |
370 | CacheType = CacheUncacheable;\r | |
371 | break;\r | |
372 | \r | |
373 | case EFI_MEMORY_WC:\r | |
374 | CacheType = CacheWriteCombining;\r | |
375 | break;\r | |
376 | \r | |
377 | case EFI_MEMORY_WT:\r | |
378 | CacheType = CacheWriteThrough;\r | |
379 | break;\r | |
380 | \r | |
381 | case EFI_MEMORY_WP:\r | |
382 | CacheType = CacheWriteProtected;\r | |
383 | break;\r | |
384 | \r | |
385 | case EFI_MEMORY_WB:\r | |
386 | CacheType = CacheWriteBack;\r | |
387 | break;\r | |
388 | \r | |
4ec21e8b | 389 | case EFI_MEMORY_UCE:\r |
390 | case EFI_MEMORY_RP:\r | |
391 | case EFI_MEMORY_XP:\r | |
392 | case EFI_MEMORY_RUNTIME:\r | |
a47463f2 | 393 | return EFI_UNSUPPORTED;\r |
4ec21e8b | 394 | \r |
395 | default:\r | |
396 | return EFI_INVALID_PARAMETER;\r | |
a47463f2 | 397 | }\r |
398 | //\r | |
399 | // call MTRR libary function\r | |
400 | //\r | |
f877f300 | 401 | Status = MtrrSetMemoryAttribute (\r |
a47463f2 | 402 | BaseAddress,\r |
403 | Length,\r | |
404 | CacheType\r | |
405 | );\r | |
406 | \r | |
a47463f2 | 407 | return (EFI_STATUS) Status;\r |
408 | }\r | |
409 | \r | |
410 | /**\r | |
411 | Initializes the valid bits mask and valid address mask for MTRRs.\r | |
412 | \r | |
413 | This function initializes the valid bits mask and valid address mask for MTRRs.\r | |
414 | \r | |
415 | **/\r | |
416 | VOID\r | |
417 | InitializeMtrrMask (\r | |
418 | VOID\r | |
419 | )\r | |
420 | {\r | |
421 | UINT32 RegEax;\r | |
422 | UINT8 PhysicalAddressBits;\r | |
423 | \r | |
424 | AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);\r | |
425 | \r | |
426 | if (RegEax >= 0x80000008) {\r | |
427 | AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);\r | |
428 | \r | |
429 | PhysicalAddressBits = (UINT8) RegEax;\r | |
430 | \r | |
431 | mValidMtrrBitsMask = LShiftU64 (1, PhysicalAddressBits) - 1;\r | |
432 | mValidMtrrAddressMask = mValidMtrrBitsMask & 0xfffffffffffff000ULL;\r | |
433 | } else {\r | |
434 | mValidMtrrBitsMask = MTRR_LIB_MSR_VALID_MASK;\r | |
435 | mValidMtrrAddressMask = MTRR_LIB_CACHE_VALID_ADDRESS;\r | |
436 | }\r | |
437 | }\r | |
438 | \r | |
439 | /**\r | |
430fbbe0 | 440 | Gets GCD Mem Space type from MTRR Type.\r |
a47463f2 | 441 | \r |
430fbbe0 | 442 | This function gets GCD Mem Space type from MTRR Type.\r |
a47463f2 | 443 | \r |
430fbbe0 | 444 | @param MtrrAttributes MTRR memory type\r |
a47463f2 | 445 | \r |
446 | @return GCD Mem Space type\r | |
447 | \r | |
448 | **/\r | |
449 | UINT64\r | |
450 | GetMemorySpaceAttributeFromMtrrType (\r | |
2c4b1bdc | 451 | IN UINT8 MtrrAttributes\r |
a47463f2 | 452 | )\r |
453 | {\r | |
454 | switch (MtrrAttributes) {\r | |
455 | case MTRR_CACHE_UNCACHEABLE:\r | |
456 | return EFI_MEMORY_UC;\r | |
457 | case MTRR_CACHE_WRITE_COMBINING:\r | |
458 | return EFI_MEMORY_WC;\r | |
459 | case MTRR_CACHE_WRITE_THROUGH:\r | |
460 | return EFI_MEMORY_WT;\r | |
461 | case MTRR_CACHE_WRITE_PROTECTED:\r | |
462 | return EFI_MEMORY_WP;\r | |
463 | case MTRR_CACHE_WRITE_BACK:\r | |
464 | return EFI_MEMORY_WB;\r | |
465 | default:\r | |
466 | return 0;\r | |
467 | }\r | |
468 | }\r | |
469 | \r | |
470 | /**\r | |
471 | Searches memory descriptors covered by given memory range.\r | |
472 | \r | |
473 | This function searches into the Gcd Memory Space for descriptors\r | |
474 | (from StartIndex to EndIndex) that contains the memory range\r | |
475 | specified by BaseAddress and Length.\r | |
476 | \r | |
477 | @param MemorySpaceMap Gcd Memory Space Map as array.\r | |
478 | @param NumberOfDescriptors Number of descriptors in map.\r | |
479 | @param BaseAddress BaseAddress for the requested range.\r | |
480 | @param Length Length for the requested range.\r | |
481 | @param StartIndex Start index into the Gcd Memory Space Map.\r | |
482 | @param EndIndex End index into the Gcd Memory Space Map.\r | |
483 | \r | |
484 | @retval EFI_SUCCESS Search successfully.\r | |
485 | @retval EFI_NOT_FOUND The requested descriptors does not exist.\r | |
486 | \r | |
487 | **/\r | |
488 | EFI_STATUS\r | |
489 | SearchGcdMemorySpaces (\r | |
490 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
491 | IN UINTN NumberOfDescriptors,\r | |
492 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
493 | IN UINT64 Length,\r | |
494 | OUT UINTN *StartIndex,\r | |
495 | OUT UINTN *EndIndex\r | |
496 | )\r | |
497 | {\r | |
498 | UINTN Index;\r | |
499 | \r | |
500 | *StartIndex = 0;\r | |
501 | *EndIndex = 0;\r | |
502 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
503 | if (BaseAddress >= MemorySpaceMap[Index].BaseAddress &&\r | |
504 | BaseAddress < MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length) {\r | |
505 | *StartIndex = Index;\r | |
506 | }\r | |
507 | if (BaseAddress + Length - 1 >= MemorySpaceMap[Index].BaseAddress &&\r | |
508 | BaseAddress + Length - 1 < MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length) {\r | |
509 | *EndIndex = Index;\r | |
510 | return EFI_SUCCESS;\r | |
511 | }\r | |
512 | }\r | |
513 | return EFI_NOT_FOUND;\r | |
514 | }\r | |
515 | \r | |
516 | /**\r | |
517 | Sets the attributes for a specified range in Gcd Memory Space Map.\r | |
518 | \r | |
519 | This function sets the attributes for a specified range in\r | |
520 | Gcd Memory Space Map.\r | |
521 | \r | |
522 | @param MemorySpaceMap Gcd Memory Space Map as array\r | |
523 | @param NumberOfDescriptors Number of descriptors in map\r | |
524 | @param BaseAddress BaseAddress for the range\r | |
525 | @param Length Length for the range\r | |
526 | @param Attributes Attributes to set\r | |
527 | \r | |
528 | @retval EFI_SUCCESS Memory attributes set successfully\r | |
529 | @retval EFI_NOT_FOUND The specified range does not exist in Gcd Memory Space\r | |
530 | \r | |
531 | **/\r | |
532 | EFI_STATUS\r | |
533 | SetGcdMemorySpaceAttributes (\r | |
534 | IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r | |
535 | IN UINTN NumberOfDescriptors,\r | |
536 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
537 | IN UINT64 Length,\r | |
538 | IN UINT64 Attributes\r | |
539 | )\r | |
540 | {\r | |
541 | EFI_STATUS Status;\r | |
542 | UINTN Index;\r | |
543 | UINTN StartIndex;\r | |
544 | UINTN EndIndex;\r | |
545 | EFI_PHYSICAL_ADDRESS RegionStart;\r | |
546 | UINT64 RegionLength;\r | |
547 | \r | |
548 | //\r | |
549 | // Get all memory descriptors covered by the memory range\r | |
550 | //\r | |
551 | Status = SearchGcdMemorySpaces (\r | |
552 | MemorySpaceMap,\r | |
553 | NumberOfDescriptors,\r | |
554 | BaseAddress,\r | |
555 | Length,\r | |
556 | &StartIndex,\r | |
557 | &EndIndex\r | |
558 | );\r | |
559 | if (EFI_ERROR (Status)) {\r | |
560 | return Status;\r | |
561 | }\r | |
562 | \r | |
563 | //\r | |
564 | // Go through all related descriptors and set attributes accordingly\r | |
565 | //\r | |
566 | for (Index = StartIndex; Index <= EndIndex; Index++) {\r | |
567 | if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r | |
568 | continue;\r | |
569 | }\r | |
570 | //\r | |
571 | // Calculate the start and end address of the overlapping range\r | |
572 | //\r | |
573 | if (BaseAddress >= MemorySpaceMap[Index].BaseAddress) {\r | |
574 | RegionStart = BaseAddress;\r | |
575 | } else {\r | |
576 | RegionStart = MemorySpaceMap[Index].BaseAddress;\r | |
577 | }\r | |
578 | if (BaseAddress + Length - 1 < MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length) {\r | |
579 | RegionLength = BaseAddress + Length - RegionStart;\r | |
580 | } else {\r | |
581 | RegionLength = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - RegionStart;\r | |
582 | }\r | |
583 | //\r | |
584 | // Set memory attributes according to MTRR attribute and the original attribute of descriptor\r | |
585 | //\r | |
586 | gDS->SetMemorySpaceAttributes (\r | |
587 | RegionStart,\r | |
588 | RegionLength,\r | |
589 | (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) | (MemorySpaceMap[Index].Capabilities & Attributes)\r | |
590 | );\r | |
591 | }\r | |
592 | \r | |
593 | return EFI_SUCCESS;\r | |
594 | }\r | |
595 | \r | |
596 | \r | |
597 | /**\r | |
598 | Refreshes the GCD Memory Space attributes according to MTRRs.\r | |
599 | \r | |
600 | This function refreshes the GCD Memory Space attributes according to MTRRs.\r | |
601 | \r | |
602 | **/\r | |
603 | VOID\r | |
604 | RefreshGcdMemoryAttributes (\r | |
605 | VOID\r | |
606 | )\r | |
607 | {\r | |
608 | EFI_STATUS Status;\r | |
609 | UINTN Index;\r | |
610 | UINTN SubIndex;\r | |
611 | UINT64 RegValue;\r | |
612 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
613 | UINT64 Length;\r | |
614 | UINT64 Attributes;\r | |
615 | UINT64 CurrentAttributes;\r | |
2c4b1bdc | 616 | UINT8 MtrrType;\r |
a47463f2 | 617 | UINTN NumberOfDescriptors;\r |
618 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;\r | |
619 | UINT64 DefaultAttributes;\r | |
6640eb36 | 620 | VARIABLE_MTRR VariableMtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];\r |
a47463f2 | 621 | MTRR_FIXED_SETTINGS MtrrFixedSettings;\r |
3b9be416 | 622 | UINT32 FirmwareVariableMtrrCount;\r |
2c4b1bdc | 623 | UINT8 DefaultMemoryType;\r |
3b9be416 | 624 | \r |
947a573a | 625 | if (!IsMtrrSupported ()) {\r |
626 | return;\r | |
627 | }\r | |
628 | \r | |
3b9be416 | 629 | FirmwareVariableMtrrCount = GetFirmwareVariableMtrrCount ();\r |
5bdfa4e5 | 630 | ASSERT (FirmwareVariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);\r |
a47463f2 | 631 | \r |
91ec7824 | 632 | mIsFlushingGCD = TRUE;\r |
a47463f2 | 633 | MemorySpaceMap = NULL;\r |
634 | \r | |
635 | //\r | |
636 | // Initialize the valid bits mask and valid address mask for MTRRs\r | |
637 | //\r | |
638 | InitializeMtrrMask ();\r | |
639 | \r | |
640 | //\r | |
641 | // Get the memory attribute of variable MTRRs\r | |
642 | //\r | |
643 | MtrrGetMemoryAttributeInVariableMtrr (\r | |
644 | mValidMtrrBitsMask,\r | |
645 | mValidMtrrAddressMask,\r | |
646 | VariableMtrr\r | |
647 | );\r | |
648 | \r | |
649 | //\r | |
650 | // Get the memory space map from GCD\r | |
651 | //\r | |
652 | Status = gDS->GetMemorySpaceMap (\r | |
653 | &NumberOfDescriptors,\r | |
654 | &MemorySpaceMap\r | |
655 | );\r | |
656 | ASSERT_EFI_ERROR (Status);\r | |
657 | \r | |
2c4b1bdc | 658 | DefaultMemoryType = (UINT8) MtrrGetDefaultMemoryType ();\r |
91ec7824 | 659 | DefaultAttributes = GetMemorySpaceAttributeFromMtrrType (DefaultMemoryType);\r |
a47463f2 | 660 | \r |
661 | //\r | |
662 | // Set default attributes to all spaces.\r | |
663 | //\r | |
664 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r | |
665 | if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r | |
666 | continue;\r | |
667 | }\r | |
668 | gDS->SetMemorySpaceAttributes (\r | |
669 | MemorySpaceMap[Index].BaseAddress,\r | |
670 | MemorySpaceMap[Index].Length,\r | |
671 | (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) |\r | |
672 | (MemorySpaceMap[Index].Capabilities & DefaultAttributes)\r | |
673 | );\r | |
674 | }\r | |
675 | \r | |
676 | //\r | |
677 | // Go for variable MTRRs with WB attribute\r | |
678 | //\r | |
3b9be416 | 679 | for (Index = 0; Index < FirmwareVariableMtrrCount; Index++) {\r |
a47463f2 | 680 | if (VariableMtrr[Index].Valid &&\r |
681 | VariableMtrr[Index].Type == MTRR_CACHE_WRITE_BACK) {\r | |
682 | SetGcdMemorySpaceAttributes (\r | |
683 | MemorySpaceMap,\r | |
684 | NumberOfDescriptors,\r | |
685 | VariableMtrr[Index].BaseAddress,\r | |
686 | VariableMtrr[Index].Length,\r | |
687 | EFI_MEMORY_WB\r | |
688 | );\r | |
689 | }\r | |
690 | }\r | |
91ec7824 | 691 | \r |
a47463f2 | 692 | //\r |
91ec7824 | 693 | // Go for variable MTRRs with the attribute except for WB and UC attributes\r |
a47463f2 | 694 | //\r |
3b9be416 | 695 | for (Index = 0; Index < FirmwareVariableMtrrCount; Index++) {\r |
d4605c23 | 696 | if (VariableMtrr[Index].Valid &&\r |
91ec7824 | 697 | VariableMtrr[Index].Type != MTRR_CACHE_WRITE_BACK &&\r |
698 | VariableMtrr[Index].Type != MTRR_CACHE_UNCACHEABLE) {\r | |
2c4b1bdc | 699 | Attributes = GetMemorySpaceAttributeFromMtrrType ((UINT8) VariableMtrr[Index].Type);\r |
a47463f2 | 700 | SetGcdMemorySpaceAttributes (\r |
701 | MemorySpaceMap,\r | |
702 | NumberOfDescriptors,\r | |
703 | VariableMtrr[Index].BaseAddress,\r | |
704 | VariableMtrr[Index].Length,\r | |
705 | Attributes\r | |
706 | );\r | |
707 | }\r | |
708 | }\r | |
709 | \r | |
91ec7824 | 710 | //\r |
711 | // Go for variable MTRRs with UC attribute\r | |
712 | //\r | |
713 | for (Index = 0; Index < FirmwareVariableMtrrCount; Index++) {\r | |
714 | if (VariableMtrr[Index].Valid &&\r | |
715 | VariableMtrr[Index].Type == MTRR_CACHE_UNCACHEABLE) {\r | |
716 | SetGcdMemorySpaceAttributes (\r | |
717 | MemorySpaceMap,\r | |
718 | NumberOfDescriptors,\r | |
719 | VariableMtrr[Index].BaseAddress,\r | |
720 | VariableMtrr[Index].Length,\r | |
721 | EFI_MEMORY_UC\r | |
722 | );\r | |
723 | }\r | |
724 | }\r | |
725 | \r | |
a47463f2 | 726 | //\r |
727 | // Go for fixed MTRRs\r | |
728 | //\r | |
729 | Attributes = 0;\r | |
730 | BaseAddress = 0;\r | |
731 | Length = 0;\r | |
732 | MtrrGetFixedMtrr (&MtrrFixedSettings);\r | |
733 | for (Index = 0; Index < MTRR_NUMBER_OF_FIXED_MTRR; Index++) {\r | |
734 | RegValue = MtrrFixedSettings.Mtrr[Index];\r | |
735 | //\r | |
736 | // Check for continuous fixed MTRR sections\r | |
737 | //\r | |
738 | for (SubIndex = 0; SubIndex < 8; SubIndex++) {\r | |
2c4b1bdc | 739 | MtrrType = (UINT8) RShiftU64 (RegValue, SubIndex * 8);\r |
a47463f2 | 740 | CurrentAttributes = GetMemorySpaceAttributeFromMtrrType (MtrrType);\r |
741 | if (Length == 0) {\r | |
742 | //\r | |
743 | // A new MTRR attribute begins\r | |
744 | //\r | |
745 | Attributes = CurrentAttributes;\r | |
746 | } else {\r | |
747 | //\r | |
748 | // If fixed MTRR attribute changed, then set memory attribute for previous atrribute\r | |
749 | //\r | |
750 | if (CurrentAttributes != Attributes) {\r | |
751 | SetGcdMemorySpaceAttributes (\r | |
752 | MemorySpaceMap,\r | |
753 | NumberOfDescriptors,\r | |
754 | BaseAddress,\r | |
755 | Length,\r | |
756 | Attributes\r | |
757 | );\r | |
758 | BaseAddress = mFixedMtrrTable[Index].BaseAddress + mFixedMtrrTable[Index].Length * SubIndex;\r | |
759 | Length = 0;\r | |
760 | Attributes = CurrentAttributes;\r | |
761 | }\r | |
762 | }\r | |
763 | Length += mFixedMtrrTable[Index].Length;\r | |
764 | }\r | |
765 | }\r | |
766 | //\r | |
767 | // Handle the last fixed MTRR region\r | |
768 | //\r | |
769 | SetGcdMemorySpaceAttributes (\r | |
770 | MemorySpaceMap,\r | |
771 | NumberOfDescriptors,\r | |
772 | BaseAddress,\r | |
773 | Length,\r | |
774 | Attributes\r | |
775 | );\r | |
776 | \r | |
777 | //\r | |
778 | // Free memory space map allocated by GCD service GetMemorySpaceMap ()\r | |
779 | //\r | |
780 | if (MemorySpaceMap != NULL) {\r | |
781 | FreePool (MemorySpaceMap);\r | |
782 | }\r | |
783 | \r | |
784 | mIsFlushingGCD = FALSE;\r | |
785 | }\r | |
786 | \r | |
a47463f2 | 787 | /**\r |
788 | Initialize Interrupt Descriptor Table for interrupt handling.\r | |
789 | \r | |
790 | **/\r | |
a47463f2 | 791 | VOID\r |
792 | InitInterruptDescriptorTable (\r | |
793 | VOID\r | |
794 | )\r | |
795 | {\r | |
e41aad15 JF |
796 | EFI_STATUS Status;\r |
797 | EFI_VECTOR_HANDOFF_INFO *VectorInfoList;\r | |
798 | EFI_VECTOR_HANDOFF_INFO *VectorInfo;\r | |
799 | \r | |
800 | VectorInfo = NULL;\r | |
801 | Status = EfiGetSystemConfigurationTable (&gEfiVectorHandoffTableGuid, (VOID **) &VectorInfoList);\r | |
802 | if (Status == EFI_SUCCESS && VectorInfoList != NULL) {\r | |
803 | VectorInfo = VectorInfoList;\r | |
a47463f2 | 804 | }\r |
e41aad15 JF |
805 | Status = InitializeCpuInterruptHandlers (VectorInfo);\r |
806 | ASSERT_EFI_ERROR (Status);\r | |
a47463f2 | 807 | }\r |
808 | \r | |
809 | \r | |
32394027 | 810 | /**\r |
811 | Callback function for idle events.\r | |
d4605c23 | 812 | \r |
32394027 | 813 | @param Event Event whose notification function is being invoked.\r |
814 | @param Context The pointer to the notification function's context,\r | |
815 | which is implementation-dependent.\r | |
816 | \r | |
817 | **/\r | |
818 | VOID\r | |
819 | EFIAPI\r | |
820 | IdleLoopEventCallback (\r | |
821 | IN EFI_EVENT Event,\r | |
822 | IN VOID *Context\r | |
823 | )\r | |
824 | {\r | |
825 | CpuSleep ();\r | |
826 | }\r | |
827 | \r | |
828 | \r | |
a47463f2 | 829 | /**\r |
830 | Initialize the state information for the CPU Architectural Protocol.\r | |
831 | \r | |
832 | @param ImageHandle Image handle this driver.\r | |
833 | @param SystemTable Pointer to the System Table.\r | |
834 | \r | |
835 | @retval EFI_SUCCESS Thread can be successfully created\r | |
836 | @retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure\r | |
837 | @retval EFI_DEVICE_ERROR Cannot create the thread\r | |
838 | \r | |
839 | **/\r | |
840 | EFI_STATUS\r | |
841 | EFIAPI\r | |
842 | InitializeCpu (\r | |
843 | IN EFI_HANDLE ImageHandle,\r | |
844 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
845 | )\r | |
846 | {\r | |
847 | EFI_STATUS Status;\r | |
32394027 | 848 | EFI_EVENT IdleLoopEvent;\r |
a47463f2 | 849 | \r |
661cab5d | 850 | InitializeFloatingPointUnits ();\r |
851 | \r | |
a47463f2 | 852 | //\r |
853 | // Make sure interrupts are disabled\r | |
854 | //\r | |
855 | DisableInterrupts ();\r | |
856 | \r | |
857 | //\r | |
858 | // Init GDT for DXE\r | |
859 | //\r | |
860 | InitGlobalDescriptorTable ();\r | |
861 | \r | |
862 | //\r | |
863 | // Setup IDT pointer, IDT and interrupt entry points\r | |
864 | //\r | |
865 | InitInterruptDescriptorTable ();\r | |
866 | \r | |
d4605c23 EB |
867 | //\r |
868 | // Enable the local APIC for Virtual Wire Mode.\r | |
869 | //\r | |
870 | ProgramVirtualWireMode ();\r | |
871 | \r | |
a47463f2 | 872 | //\r |
873 | // Install CPU Architectural Protocol\r | |
874 | //\r | |
875 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
876 | &mCpuHandle,\r | |
877 | &gEfiCpuArchProtocolGuid, &gCpu,\r | |
878 | NULL\r | |
879 | );\r | |
880 | ASSERT_EFI_ERROR (Status);\r | |
881 | \r | |
882 | //\r | |
883 | // Refresh GCD memory space map according to MTRR value.\r | |
884 | //\r | |
885 | RefreshGcdMemoryAttributes ();\r | |
886 | \r | |
32394027 | 887 | //\r |
888 | // Setup a callback for idle events\r | |
889 | //\r | |
890 | Status = gBS->CreateEventEx (\r | |
891 | EVT_NOTIFY_SIGNAL,\r | |
892 | TPL_NOTIFY,\r | |
893 | IdleLoopEventCallback,\r | |
894 | NULL,\r | |
895 | &gIdleLoopEventGuid,\r | |
896 | &IdleLoopEvent\r | |
897 | );\r | |
898 | ASSERT_EFI_ERROR (Status);\r | |
899 | \r | |
a47463f2 | 900 | return Status;\r |
901 | }\r | |
902 | \r |