/** @file\r
MP initialize support functions for PEI phase.\r
\r
- Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
**/\r
\r
#include "MpLib.h"\r
-#include <Ppi/EndOfPeiPhase.h>\r
-#include <Library/PeiServicesLib.h>\r
-\r
-//\r
-// Global PEI notify function descriptor on EndofPei event\r
-//\r
-GLOBAL_REMOVE_IF_UNREFERENCED EFI_PEI_NOTIFY_DESCRIPTOR mMpInitLibNotifyList = {\r
- (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
- &gEfiEndOfPeiSignalPpiGuid,\r
- CpuMpEndOfPeiCallback\r
-};\r
-\r
\r
/**\r
Enable Debug Agent to support source debugging on AP function.\r
\r
/**\r
Get pointer to CPU MP Data structure.\r
+ For BSP, the pointer is retrieved from HOB.\r
+ For AP, the structure is just after IDT.\r
\r
@return The pointer to CPU MP Data structure.\r
**/\r
VOID\r
)\r
{\r
- CPU_MP_DATA *CpuMpData;\r
-\r
- CpuMpData = GetCpuMpDataFromGuidedHob ();\r
- ASSERT (CpuMpData != NULL);\r
+ CPU_MP_DATA *CpuMpData;\r
+ MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr;\r
+ IA32_DESCRIPTOR Idtr;\r
+\r
+ ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);\r
+ if (ApicBaseMsr.Bits.BSP == 1) {\r
+ CpuMpData = GetCpuMpDataFromGuidedHob ();\r
+ ASSERT (CpuMpData != NULL);\r
+ } else {\r
+ AsmReadIdtr (&Idtr);\r
+ CpuMpData = (CPU_MP_DATA *) (Idtr.Base + Idtr.Limit + 1);\r
+ }\r
return CpuMpData;\r
}\r
\r
);\r
}\r
\r
-/**\r
- Notify function on End Of PEI PPI.\r
-\r
- On S3 boot, this function will restore wakeup buffer data.\r
- On normal boot, this function will flag wakeup buffer to be un-used type.\r
-\r
- @param[in] PeiServices The pointer to the PEI Services Table.\r
- @param[in] NotifyDescriptor Address of the notification descriptor data structure.\r
- @param[in] Ppi Address of the PPI that was installed.\r
-\r
- @retval EFI_SUCCESS When everything is OK.\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-CpuMpEndOfPeiCallback (\r
- IN EFI_PEI_SERVICES **PeiServices,\r
- IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,\r
- IN VOID *Ppi\r
- )\r
-{\r
- EFI_STATUS Status;\r
- EFI_BOOT_MODE BootMode;\r
- CPU_MP_DATA *CpuMpData;\r
- EFI_PEI_HOB_POINTERS Hob;\r
- EFI_HOB_MEMORY_ALLOCATION *MemoryHob;\r
-\r
- DEBUG ((DEBUG_INFO, "PeiMpInitLib: CpuMpEndOfPeiCallback () invoked\n"));\r
-\r
- Status = PeiServicesGetBootMode (&BootMode);\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- CpuMpData = GetCpuMpData ();\r
- if (BootMode != BOOT_ON_S3_RESUME) {\r
- //\r
- // Get the HOB list for processing\r
- //\r
- Hob.Raw = GetHobList ();\r
- //\r
- // Collect memory ranges\r
- //\r
- while (!END_OF_HOB_LIST (Hob)) {\r
- if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {\r
- MemoryHob = Hob.MemoryAllocation;\r
- if (MemoryHob->AllocDescriptor.MemoryBaseAddress == CpuMpData->WakeupBuffer) {\r
- //\r
- // Flag this HOB type to un-used\r
- //\r
- GET_HOB_TYPE (Hob) = EFI_HOB_TYPE_UNUSED;\r
- break;\r
- }\r
- }\r
- Hob.Raw = GET_NEXT_HOB (Hob);\r
- }\r
- } else {\r
- CpuMpData->SaveRestoreFlag = TRUE;\r
- RestoreWakeupBuffer (CpuMpData);\r
- }\r
- return EFI_SUCCESS;\r
-}\r
-\r
/**\r
Check if AP wakeup buffer is overlapped with existing allocated buffer.\r
\r
**/\r
BOOLEAN\r
CheckOverlapWithAllocatedBuffer (\r
- IN UINTN WakeupBufferStart,\r
- IN UINTN WakeupBufferEnd\r
+ IN UINT64 WakeupBufferStart,\r
+ IN UINT64 WakeupBufferEnd\r
)\r
{\r
EFI_PEI_HOB_POINTERS Hob;\r
EFI_HOB_MEMORY_ALLOCATION *MemoryHob;\r
BOOLEAN Overlapped;\r
- UINTN MemoryStart;\r
- UINTN MemoryEnd;\r
+ UINT64 MemoryStart;\r
+ UINT64 MemoryEnd;\r
\r
Overlapped = FALSE;\r
//\r
while (!END_OF_HOB_LIST (Hob)) {\r
if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {\r
MemoryHob = Hob.MemoryAllocation;\r
- MemoryStart = (UINTN) MemoryHob->AllocDescriptor.MemoryBaseAddress;\r
- MemoryEnd = (UINTN) (MemoryHob->AllocDescriptor.MemoryBaseAddress +\r
- MemoryHob->AllocDescriptor.MemoryLength);\r
+ MemoryStart = MemoryHob->AllocDescriptor.MemoryBaseAddress;\r
+ MemoryEnd = MemoryHob->AllocDescriptor.MemoryBaseAddress + MemoryHob->AllocDescriptor.MemoryLength;\r
if (!((WakeupBufferStart >= MemoryEnd) || (WakeupBufferEnd <= MemoryStart))) {\r
Overlapped = TRUE;\r
break;\r
)\r
{\r
EFI_PEI_HOB_POINTERS Hob;\r
- UINTN WakeupBufferStart;\r
- UINTN WakeupBufferEnd;\r
+ UINT64 WakeupBufferStart;\r
+ UINT64 WakeupBufferEnd;\r
\r
WakeupBufferSize = (WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1);\r
\r
//\r
// Need memory under 1MB to be collected here\r
//\r
- WakeupBufferEnd = (UINTN) (Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength);\r
+ WakeupBufferEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;\r
if (WakeupBufferEnd > BASE_1MB) {\r
//\r
// Wakeup buffer should be under 1MB\r
}\r
DEBUG ((DEBUG_INFO, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",\r
WakeupBufferStart, WakeupBufferSize));\r
- //\r
- // Create a memory allocation HOB.\r
- //\r
- BuildMemoryAllocationHob (\r
- WakeupBufferStart,\r
- WakeupBufferSize,\r
- EfiBootServicesData\r
- );\r
- return WakeupBufferStart;\r
+ return (UINTN)WakeupBufferStart;\r
}\r
}\r
}\r
}\r
\r
/**\r
- Allocate reset vector buffer.\r
+ Get available EfiBootServicesCode memory below 4GB by specified size.\r
\r
- @param[in, out] CpuMpData The pointer to CPU MP Data structure.\r
-**/\r
-VOID\r
-AllocateResetVector (\r
- IN OUT CPU_MP_DATA *CpuMpData\r
- )\r
-{\r
- UINTN ApResetVectorSize;\r
-\r
- if (CpuMpData->WakeupBuffer == (UINTN) -1) {\r
- ApResetVectorSize = CpuMpData->AddressMap.RendezvousFunnelSize +\r
- sizeof (MP_CPU_EXCHANGE_INFO);\r
+ This buffer is required to safely transfer AP from real address mode to\r
+ protected mode or long mode, due to the fact that the buffer returned by\r
+ GetWakeupBuffer() may be marked as non-executable.\r
\r
- CpuMpData->WakeupBuffer = GetWakeupBuffer (ApResetVectorSize);\r
- CpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN)\r
- (CpuMpData->WakeupBuffer + CpuMpData->AddressMap.RendezvousFunnelSize);\r
- BackupAndPrepareWakeupBuffer (CpuMpData);\r
- }\r
+ @param[in] BufferSize Wakeup transition buffer size.\r
\r
- if (CpuMpData->SaveRestoreFlag) {\r
- BackupAndPrepareWakeupBuffer (CpuMpData);\r
- }\r
-}\r
-\r
-/**\r
- Free AP reset vector buffer.\r
-\r
- @param[in] CpuMpData The pointer to CPU MP Data structure.\r
+ @retval other Return wakeup transition buffer address below 4GB.\r
+ @retval 0 Cannot find free memory below 4GB.\r
**/\r
-VOID\r
-FreeResetVector (\r
- IN CPU_MP_DATA *CpuMpData\r
+UINTN\r
+GetModeTransitionBuffer (\r
+ IN UINTN BufferSize\r
)\r
{\r
- if (CpuMpData->SaveRestoreFlag) {\r
- RestoreWakeupBuffer (CpuMpData);\r
- }\r
+ //\r
+ // PEI phase doesn't need to do such transition. So simply return 0.\r
+ //\r
+ return 0;\r
}\r
\r
/**\r
IN CPU_MP_DATA *CpuMpData\r
)\r
{\r
- EFI_STATUS Status;\r
-\r
SaveCpuMpData (CpuMpData);\r
-\r
- if (CpuMpData->CpuCount == 1) {\r
- //\r
- // If only BSP exists, return\r
- //\r
- return;\r
- }\r
-\r
- //\r
- // Register an event for EndOfPei\r
- //\r
- Status = PeiServicesNotifyPpi (&mMpInitLibNotifyList);\r
- ASSERT_EFI_ERROR (Status);\r
}\r
\r
/**\r
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