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[mirror_edk2.git] / UefiCpuPkg / CpuMpPei / CpuMpPei.c
1 /** @file
2 CPU PEI Module installs CPU Multiple Processor PPI.
3
4 Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
5 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 **/
14
15 #include "CpuMpPei.h"
16
17 //
18 // Global Descriptor Table (GDT)
19 //
20 GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT mGdtEntries[] = {
21 /* selector { Global Segment Descriptor } */
22 /* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor
23 /* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor
24 /* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor
25 /* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
26 /* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor
27 /* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
28 /* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
29 /* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor
30 /* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
31 };
32
33 //
34 // IA32 Gdt register
35 //
36 GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR mGdt = {
37 sizeof (mGdtEntries) - 1,
38 (UINTN) mGdtEntries
39 };
40
41 GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {
42 (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
43 &gEfiEndOfPeiSignalPpiGuid,
44 CpuMpEndOfPeiCallback
45 };
46
47 /**
48 Sort the APIC ID of all processors.
49
50 This function sorts the APIC ID of all processors so that processor number is
51 assigned in the ascending order of APIC ID which eases MP debugging.
52
53 @param PeiCpuMpData Pointer to PEI CPU MP Data
54 **/
55 VOID
56 SortApicId (
57 IN PEI_CPU_MP_DATA *PeiCpuMpData
58 )
59 {
60 UINTN Index1;
61 UINTN Index2;
62 UINTN Index3;
63 UINT32 ApicId;
64 EFI_HEALTH_FLAGS Health;
65 UINT32 ApCount;
66
67 ApCount = PeiCpuMpData->CpuCount - 1;
68
69 if (ApCount != 0) {
70 for (Index1 = 0; Index1 < ApCount; Index1++) {
71 Index3 = Index1;
72 //
73 // Sort key is the hardware default APIC ID
74 //
75 ApicId = PeiCpuMpData->CpuData[Index1].ApicId;
76 for (Index2 = Index1 + 1; Index2 <= ApCount; Index2++) {
77 if (ApicId > PeiCpuMpData->CpuData[Index2].ApicId) {
78 Index3 = Index2;
79 ApicId = PeiCpuMpData->CpuData[Index2].ApicId;
80 }
81 }
82 if (Index3 != Index1) {
83 PeiCpuMpData->CpuData[Index3].ApicId = PeiCpuMpData->CpuData[Index1].ApicId;
84 PeiCpuMpData->CpuData[Index1].ApicId = ApicId;
85 Health = PeiCpuMpData->CpuData[Index3].Health;
86 PeiCpuMpData->CpuData[Index3].Health = PeiCpuMpData->CpuData[Index1].Health;
87 PeiCpuMpData->CpuData[Index1].Health = Health;
88 }
89 }
90
91 //
92 // Get the processor number for the BSP
93 //
94 ApicId = GetInitialApicId ();
95 for (Index1 = 0; Index1 < PeiCpuMpData->CpuCount; Index1++) {
96 if (PeiCpuMpData->CpuData[Index1].ApicId == ApicId) {
97 PeiCpuMpData->BspNumber = (UINT32) Index1;
98 break;
99 }
100 }
101 }
102 }
103
104 /**
105 Get CPU MP Data pointer from the Guided HOB.
106
107 @return Pointer to Pointer to PEI CPU MP Data
108 **/
109 PEI_CPU_MP_DATA *
110 GetMpHobData (
111 VOID
112 )
113 {
114 EFI_HOB_GUID_TYPE *GuidHob;
115 VOID *DataInHob;
116 PEI_CPU_MP_DATA *CpuMpData;
117
118 CpuMpData = NULL;
119 GuidHob = GetFirstGuidHob (&gEfiCallerIdGuid);
120 if (GuidHob != NULL) {
121 DataInHob = GET_GUID_HOB_DATA (GuidHob);
122 CpuMpData = (PEI_CPU_MP_DATA *)(*(UINTN *)DataInHob);
123 }
124 ASSERT (CpuMpData != NULL);
125 return CpuMpData;
126 }
127
128 /**
129 This function will be called from AP reset code if BSP uses WakeUpAP.
130
131 @param ExchangeInfo Pointer to the MP exchange info buffer
132 @param NumApsExecuting Number of curret executing AP
133 **/
134 VOID
135 EFIAPI
136 ApCFunction (
137 IN MP_CPU_EXCHANGE_INFO *ExchangeInfo,
138 IN UINTN NumApsExecuting
139 )
140 {
141 PEI_CPU_MP_DATA *PeiCpuMpData;
142 UINTN ProcessorNumber;
143 EFI_AP_PROCEDURE Procedure;
144 UINTN BistData;
145
146 PeiCpuMpData = ExchangeInfo->PeiCpuMpData;
147 if (PeiCpuMpData->InitFlag) {
148 //
149 // This is first time AP wakeup, get BIST inforamtion from AP stack
150 //
151 BistData = *(UINTN *) (PeiCpuMpData->Buffer + NumApsExecuting * PeiCpuMpData->CpuApStackSize - sizeof (UINTN));
152 PeiCpuMpData->CpuData[NumApsExecuting].ApicId = GetInitialApicId ();
153 PeiCpuMpData->CpuData[NumApsExecuting].Health.Uint32 = (UINT32) BistData;
154 //
155 // Sync BSP's Mtrr table to all wakeup APs and load microcode on APs.
156 //
157 MtrrSetAllMtrrs (&PeiCpuMpData->MtrrTable);
158 MicrocodeDetect ();
159 } else {
160 //
161 // Execute AP function if AP is not disabled
162 //
163 GetProcessorNumber (PeiCpuMpData, &ProcessorNumber);
164 if ((PeiCpuMpData->CpuData[ProcessorNumber].State != CpuStateDisabled) &&
165 (PeiCpuMpData->ApFunction != 0)) {
166 PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateBusy;
167 Procedure = (EFI_AP_PROCEDURE)(UINTN)PeiCpuMpData->ApFunction;
168 Procedure ((VOID *)(UINTN)PeiCpuMpData->ApFunctionArgument);
169 PeiCpuMpData->CpuData[ProcessorNumber].State = CpuStateIdle;
170 }
171 }
172
173 //
174 // AP finished executing C code
175 //
176 InterlockedIncrement ((UINT32 *)&PeiCpuMpData->FinishedCount);
177
178 AsmCliHltLoop ();
179 }
180
181 /**
182 This function will be called by BSP to wakeup AP.
183
184 @param PeiCpuMpData Pointer to PEI CPU MP Data
185 @param Broadcast TRUE: Send broadcast IPI to all APs
186 FALSE: Send IPI to AP by ApicId
187 @param ApicId Apic ID for the processor to be waked
188 @param Procedure The function to be invoked by AP
189 @param ProcedureArgument The argument to be passed into AP function
190 **/
191 VOID
192 WakeUpAP (
193 IN PEI_CPU_MP_DATA *PeiCpuMpData,
194 IN BOOLEAN Broadcast,
195 IN UINT32 ApicId,
196 IN EFI_AP_PROCEDURE Procedure, OPTIONAL
197 IN VOID *ProcedureArgument OPTIONAL
198 )
199 {
200 volatile MP_CPU_EXCHANGE_INFO *ExchangeInfo;
201
202 PeiCpuMpData->ApFunction = (UINTN) Procedure;
203 PeiCpuMpData->ApFunctionArgument = (UINTN) ProcedureArgument;
204 PeiCpuMpData->FinishedCount = 0;
205
206 ExchangeInfo = PeiCpuMpData->MpCpuExchangeInfo;
207 ExchangeInfo->Lock = 0;
208 ExchangeInfo->StackStart = PeiCpuMpData->Buffer;
209 ExchangeInfo->StackSize = PeiCpuMpData->CpuApStackSize;
210 ExchangeInfo->BufferStart = PeiCpuMpData->WakeupBuffer;
211 ExchangeInfo->PmodeOffset = PeiCpuMpData->AddressMap.PModeEntryOffset;
212 ExchangeInfo->LmodeOffset = PeiCpuMpData->AddressMap.LModeEntryOffset;
213 ExchangeInfo->Cr3 = AsmReadCr3 ();
214 ExchangeInfo->CFunction = (UINTN) ApCFunction;
215 ExchangeInfo->NumApsExecuting = 0;
216 ExchangeInfo->PeiCpuMpData = PeiCpuMpData;
217
218 //
219 // Get the BSP's data of GDT and IDT
220 //
221 CopyMem ((VOID *)&ExchangeInfo->GdtrProfile, &mGdt, sizeof(mGdt));
222 AsmReadIdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->IdtrProfile);
223
224 if (Broadcast) {
225 SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);
226 } else {
227 SendInitSipiSipi (ApicId, (UINT32) ExchangeInfo->BufferStart);
228 }
229
230 return ;
231 }
232
233 /**
234 Get available system memory below 1MB by specified size.
235
236 @param WakeupBufferSize Wakeup buffer size required
237
238 @retval other Return wakeup buffer address below 1MB.
239 @retval -1 Cannot find free memory below 1MB.
240 **/
241 UINTN
242 GetWakeupBuffer (
243 IN UINTN WakeupBufferSize
244 )
245 {
246 EFI_PEI_HOB_POINTERS Hob;
247 UINTN WakeupBufferStart;
248 UINTN WakeupBufferEnd;
249
250 //
251 // Get the HOB list for processing
252 //
253 Hob.Raw = GetHobList ();
254
255 //
256 // Collect memory ranges
257 //
258 while (!END_OF_HOB_LIST (Hob)) {
259 if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
260 if ((Hob.ResourceDescriptor->PhysicalStart < BASE_1MB) &&
261 (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
262 ((Hob.ResourceDescriptor->ResourceAttribute &
263 (EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED |
264 EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED |
265 EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED
266 )) == 0)
267 ) {
268 //
269 // Need memory under 1MB to be collected here
270 //
271 WakeupBufferEnd = (UINTN) (Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength);
272 if (WakeupBufferEnd > BASE_1MB) {
273 //
274 // Wakeup buffer should be under 1MB
275 //
276 WakeupBufferEnd = BASE_1MB;
277 }
278 //
279 // Wakeup buffer should be aligned on 4KB
280 //
281 WakeupBufferStart = (WakeupBufferEnd - WakeupBufferSize) & ~(SIZE_4KB - 1);
282 if (WakeupBufferStart < Hob.ResourceDescriptor->PhysicalStart) {
283 continue;
284 }
285 //
286 // Create a memory allocation HOB.
287 //
288 BuildMemoryAllocationHob (
289 WakeupBufferStart,
290 WakeupBufferSize,
291 EfiBootServicesData
292 );
293 return WakeupBufferStart;
294 }
295 }
296 //
297 // Find the next HOB
298 //
299 Hob.Raw = GET_NEXT_HOB (Hob);
300 }
301
302 return (UINTN) -1;
303 }
304
305 /**
306 Get available system memory below 1MB by specified size.
307
308 @param PeiCpuMpData Pointer to PEI CPU MP Data
309 **/
310 VOID
311 BackupAndPrepareWakeupBuffer(
312 IN PEI_CPU_MP_DATA *PeiCpuMpData
313 )
314 {
315 CopyMem (
316 (VOID *) PeiCpuMpData->BackupBuffer,
317 (VOID *) PeiCpuMpData->WakeupBuffer,
318 PeiCpuMpData->BackupBufferSize
319 );
320 CopyMem (
321 (VOID *) PeiCpuMpData->WakeupBuffer,
322 (VOID *) PeiCpuMpData->AddressMap.RendezvousFunnelAddress,
323 PeiCpuMpData->AddressMap.RendezvousFunnelSize
324 );
325 }
326
327 /**
328 Restore wakeup buffer data.
329
330 @param PeiCpuMpData Pointer to PEI CPU MP Data
331 **/
332 VOID
333 RestoreWakeupBuffer(
334 IN PEI_CPU_MP_DATA *PeiCpuMpData
335 )
336 {
337 CopyMem ((VOID *) PeiCpuMpData->WakeupBuffer, (VOID *) PeiCpuMpData->BackupBuffer, PeiCpuMpData->BackupBufferSize);
338 }
339
340 /**
341 This function will get CPU count in the system.
342
343 @param PeiCpuMpData Pointer to PEI CPU MP Data
344
345 @return AP processor count
346 **/
347 UINT32
348 CountProcessorNumber (
349 IN PEI_CPU_MP_DATA *PeiCpuMpData
350 )
351 {
352 //
353 // Load Microcode on BSP
354 //
355 MicrocodeDetect ();
356 //
357 // Store BSP's MTRR setting
358 //
359 MtrrGetAllMtrrs (&PeiCpuMpData->MtrrTable);
360
361 //
362 // Only perform AP detection if PcdCpuMaxLogicalProcessorNumber is greater than 1
363 //
364 if (PcdGet32 (PcdCpuMaxLogicalProcessorNumber) > 1) {
365 //
366 // Send broadcast IPI to APs to wakeup APs
367 //
368 PeiCpuMpData->InitFlag = 1;
369 WakeUpAP (PeiCpuMpData, TRUE, 0, NULL, NULL);
370 //
371 // Wait for AP task to complete and then exit.
372 //
373 MicroSecondDelay (PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds));
374 PeiCpuMpData->InitFlag = 0;
375 PeiCpuMpData->CpuCount += (UINT32)PeiCpuMpData->MpCpuExchangeInfo->NumApsExecuting;
376 ASSERT (PeiCpuMpData->CpuCount <= PcdGet32 (PcdCpuMaxLogicalProcessorNumber));
377 //
378 // Sort BSP/Aps by CPU APIC ID in ascending order
379 //
380 SortApicId (PeiCpuMpData);
381 }
382
383 DEBUG ((EFI_D_INFO, "CpuMpPei: Find %d processors in system.\n", PeiCpuMpData->CpuCount));
384 return PeiCpuMpData->CpuCount;
385 }
386
387 /**
388 Prepare for AP wakeup buffer and copy AP reset code into it.
389
390 Get wakeup buffer below 1MB. Allocate memory for CPU MP Data and APs Stack.
391
392 @return Pointer to PEI CPU MP Data
393 **/
394 PEI_CPU_MP_DATA *
395 PrepareAPStartupVector (
396 VOID
397 )
398 {
399 EFI_STATUS Status;
400 UINT32 MaxCpuCount;
401 PEI_CPU_MP_DATA *PeiCpuMpData;
402 EFI_PHYSICAL_ADDRESS Buffer;
403 UINTN BufferSize;
404 UINTN WakeupBuffer;
405 UINTN WakeupBufferSize;
406 MP_ASSEMBLY_ADDRESS_MAP AddressMap;
407
408 AsmGetAddressMap (&AddressMap);
409 WakeupBufferSize = AddressMap.RendezvousFunnelSize + sizeof (MP_CPU_EXCHANGE_INFO);
410 WakeupBuffer = GetWakeupBuffer ((WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1));
411 ASSERT (WakeupBuffer != (UINTN) -1);
412 DEBUG ((EFI_D_INFO, "CpuMpPei: WakeupBuffer = 0x%x\n", WakeupBuffer));
413
414 //
415 // Allocate Pages for APs stack, CPU MP Data and backup buffer for wakeup buffer
416 //
417 MaxCpuCount = PcdGet32(PcdCpuMaxLogicalProcessorNumber);
418 BufferSize = PcdGet32 (PcdCpuApStackSize) * MaxCpuCount + sizeof (PEI_CPU_MP_DATA)
419 + WakeupBufferSize + sizeof (PEI_CPU_DATA) * MaxCpuCount;
420 Status = PeiServicesAllocatePages (
421 EfiBootServicesData,
422 EFI_SIZE_TO_PAGES (BufferSize),
423 &Buffer
424 );
425 ASSERT_EFI_ERROR (Status);
426
427 PeiCpuMpData = (PEI_CPU_MP_DATA *) (UINTN) (Buffer + PcdGet32 (PcdCpuApStackSize) * MaxCpuCount);
428 PeiCpuMpData->Buffer = (UINTN) Buffer;
429 PeiCpuMpData->CpuApStackSize = PcdGet32 (PcdCpuApStackSize);
430 PeiCpuMpData->WakeupBuffer = WakeupBuffer;
431 PeiCpuMpData->BackupBuffer = (UINTN)PeiCpuMpData + sizeof (PEI_CPU_MP_DATA);
432 PeiCpuMpData->BackupBufferSize = WakeupBufferSize;
433 PeiCpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN) (WakeupBuffer + AddressMap.RendezvousFunnelSize);
434
435 PeiCpuMpData->CpuCount = 1;
436 PeiCpuMpData->BspNumber = 0;
437 PeiCpuMpData->CpuData = (PEI_CPU_DATA *) (PeiCpuMpData->BackupBuffer +
438 PeiCpuMpData->BackupBufferSize);
439 PeiCpuMpData->CpuData[0].ApicId = GetInitialApicId ();
440 PeiCpuMpData->CpuData[0].Health.Uint32 = 0;
441 PeiCpuMpData->EndOfPeiFlag = FALSE;
442 CopyMem (&PeiCpuMpData->AddressMap, &AddressMap, sizeof (MP_ASSEMBLY_ADDRESS_MAP));
443
444 //
445 // Backup original data and copy AP reset code in it
446 //
447 BackupAndPrepareWakeupBuffer(PeiCpuMpData);
448
449 return PeiCpuMpData;
450 }
451
452 /**
453 Notify function on End Of Pei PPI.
454
455 On S3 boot, this function will restore wakeup buffer data.
456 On normal boot, this function will flag wakeup buffer to be un-used type.
457
458 @param PeiServices The pointer to the PEI Services Table.
459 @param NotifyDescriptor Address of the notification descriptor data structure.
460 @param Ppi Address of the PPI that was installed.
461
462 @retval EFI_SUCCESS When everything is OK.
463
464 **/
465 EFI_STATUS
466 EFIAPI
467 CpuMpEndOfPeiCallback (
468 IN EFI_PEI_SERVICES **PeiServices,
469 IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
470 IN VOID *Ppi
471 )
472 {
473 EFI_STATUS Status;
474 EFI_BOOT_MODE BootMode;
475 PEI_CPU_MP_DATA *PeiCpuMpData;
476 EFI_PEI_HOB_POINTERS Hob;
477 EFI_HOB_MEMORY_ALLOCATION *MemoryHob;
478
479 DEBUG ((EFI_D_INFO, "CpuMpPei: CpuMpEndOfPeiCallback () invokded\n"));
480
481 Status = PeiServicesGetBootMode (&BootMode);
482 ASSERT_EFI_ERROR (Status);
483
484 PeiCpuMpData = GetMpHobData ();
485 ASSERT (PeiCpuMpData != NULL);
486
487 if (BootMode != BOOT_ON_S3_RESUME) {
488 //
489 // Get the HOB list for processing
490 //
491 Hob.Raw = GetHobList ();
492 //
493 // Collect memory ranges
494 //
495 while (!END_OF_HOB_LIST (Hob)) {
496 if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {
497 MemoryHob = Hob.MemoryAllocation;
498 if(MemoryHob->AllocDescriptor.MemoryBaseAddress == PeiCpuMpData->WakeupBuffer) {
499 //
500 // Flag this HOB type to un-used
501 //
502 GET_HOB_TYPE (Hob) = EFI_HOB_TYPE_UNUSED;
503 break;
504 }
505 }
506 Hob.Raw = GET_NEXT_HOB (Hob);
507 }
508 } else {
509 RestoreWakeupBuffer (PeiCpuMpData);
510 PeiCpuMpData->EndOfPeiFlag = TRUE;
511 }
512 return EFI_SUCCESS;
513 }
514
515 /**
516 The Entry point of the MP CPU PEIM.
517
518 This function will wakeup APs and collect CPU AP count and install the
519 Mp Service Ppi.
520
521 @param FileHandle Handle of the file being invoked.
522 @param PeiServices Describes the list of possible PEI Services.
523
524 @retval EFI_SUCCESS MpServicePpi is installed successfully.
525
526 **/
527 EFI_STATUS
528 EFIAPI
529 CpuMpPeimInit (
530 IN EFI_PEI_FILE_HANDLE FileHandle,
531 IN CONST EFI_PEI_SERVICES **PeiServices
532 )
533 {
534 EFI_STATUS Status;
535 PEI_CPU_MP_DATA *PeiCpuMpData;
536 UINT32 ProcessorCount;
537
538 //
539 // Load new GDT table on BSP
540 //
541 AsmInitializeGdt (&mGdt);
542 //
543 // Get wakeup buffer and copy AP reset code in it
544 //
545 PeiCpuMpData = PrepareAPStartupVector ();
546 //
547 // Count processor number and collect processor information
548 //
549 ProcessorCount = CountProcessorNumber (PeiCpuMpData);
550 //
551 // Build location of PEI CPU MP DATA buffer in HOB
552 //
553 BuildGuidDataHob (
554 &gEfiCallerIdGuid,
555 (VOID *)&PeiCpuMpData,
556 sizeof(UINT64)
557 );
558 //
559 // Update and publish CPU BIST information
560 //
561 CollectBistDataFromPpi (PeiServices, PeiCpuMpData);
562 //
563 // register an event for EndOfPei
564 //
565 Status = PeiServicesNotifyPpi (&mNotifyList);
566 ASSERT_EFI_ERROR (Status);
567 //
568 // Install CPU MP PPI
569 //
570 Status = PeiServicesInstallPpi(&mPeiCpuMpPpiDesc);
571 ASSERT_EFI_ERROR (Status);
572
573 return Status;
574 }
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