+++ /dev/null
-/** @file\r
- This is the driver that produce AcpiVariable hob and slit SmramReserve hob\r
- for ECP platform.\r
-\r
-Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r
-\r
-This program and the accompanying materials\r
-are licensed and made available under the terms and conditions\r
-of the BSD License which accompanies this distribution. The\r
-full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
-\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
-\r
-#include <PiPei.h>\r
-#include <Guid/SmramMemoryReserve.h>\r
-#include <Guid/AcpiS3Context.h>\r
-\r
-#include <Library/MemoryAllocationLib.h>\r
-#include <Library/DebugLib.h>\r
-#include <Library/HobLib.h>\r
-#include <Library/PeiServicesLib.h>\r
-#include <Library/BaseMemoryLib.h>\r
-\r
-/**\r
- Retrieves the data structure associated witht he GUIDed HOB of type gEfiSmmPeiSmramMemoryReserveGuid\r
- \r
- @retval NULL A HOB of type gEfiSmmPeiSmramMemoryReserveGuid could not be found.\r
- @retval !NULL A pointer to the GUID data from a HIB of type gEfiSmmPeiSmramMemoryReserveGuid\r
-\r
-**/\r
-EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *\r
-GetSrmamHobData (\r
- VOID\r
- )\r
-{\r
- VOID *GuidHob;\r
-\r
- //\r
- // Search SmramMemoryReserve HOB that describes SMRAM region\r
- //\r
- GuidHob = GetFirstGuidHob (&gEfiSmmPeiSmramMemoryReserveGuid);\r
- if (GuidHob == NULL) {\r
- return NULL;\r
- }\r
- return (EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *)GET_GUID_HOB_DATA (GuidHob);\r
-}\r
-\r
-/**\r
- This routine will split SmramReserve hob to reserve 1 page for SMRAM content in S3 phase\r
- for PI SMM core.\r
- \r
- @retval EFI_SUCCESS The gEfiSmmPeiSmramMemoryReserveGuid is splited successfully.\r
- @retval EFI_NOT_FOUND The gEfiSmmPeiSmramMemoryReserveGuid is not found.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-SplitSmramReserveHob (\r
- VOID\r
- )\r
-{\r
- EFI_HOB_GUID_TYPE *GuidHob;\r
- EFI_PEI_HOB_POINTERS Hob;\r
- EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *DescriptorBlock;\r
- EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *NewDescriptorBlock;\r
- UINTN BufferSize;\r
- UINTN SmramRanges;\r
- UINTN Index;\r
- UINTN SubIndex;\r
-\r
- //\r
- // Retrieve the GUID HOB data that contains the set of SMRAM descriptyors\r
- //\r
- GuidHob = GetFirstGuidHob (&gEfiSmmPeiSmramMemoryReserveGuid);\r
- if (GuidHob == NULL) {\r
- return EFI_NOT_FOUND;\r
- }\r
-\r
- DescriptorBlock = (EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *)GET_GUID_HOB_DATA (GuidHob);\r
-\r
- //\r
- // Allocate one extra EFI_SMRAM_DESCRIPTOR to describe a page of SMRAM memory that contains a pointer\r
- // to the SMM Services Table that is required on the S3 resume path\r
- //\r
- SmramRanges = DescriptorBlock->NumberOfSmmReservedRegions;\r
- BufferSize = sizeof (EFI_SMRAM_HOB_DESCRIPTOR_BLOCK) + (SmramRanges * sizeof (EFI_SMRAM_DESCRIPTOR));\r
-\r
- Hob.Raw = BuildGuidHob (\r
- &gEfiSmmPeiSmramMemoryReserveGuid,\r
- BufferSize\r
- );\r
- ASSERT (Hob.Raw);\r
- NewDescriptorBlock = (EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *)Hob.Raw;\r
-\r
- //\r
- // Copy old EFI_SMRAM_HOB_DESCRIPTOR_BLOCK to new allocated region\r
- //\r
- CopyMem ((VOID *)Hob.Raw, DescriptorBlock, BufferSize - sizeof(EFI_SMRAM_DESCRIPTOR));\r
-\r
- //\r
- // Increase the number of SMRAM descriptors by 1 to make room for the ALLOCATED descriptor of size EFI_PAGE_SIZE\r
- //\r
- NewDescriptorBlock->NumberOfSmmReservedRegions = (UINT32)(SmramRanges + 1);\r
-\r
- ASSERT (SmramRanges >= 1);\r
- //\r
- // Copy last entry to the end - we assume TSEG is last entry, which is same assumption as Framework CPU/SMM driver\r
- //\r
- CopyMem (&NewDescriptorBlock->Descriptor[SmramRanges], &NewDescriptorBlock->Descriptor[SmramRanges - 1], sizeof(EFI_SMRAM_DESCRIPTOR));\r
-\r
- //\r
- // Update the last but 1 entry in the array with a size of EFI_PAGE_SIZE and put into the ALLOCATED state\r
- //\r
- NewDescriptorBlock->Descriptor[SmramRanges - 1].PhysicalSize = EFI_PAGE_SIZE;\r
- NewDescriptorBlock->Descriptor[SmramRanges - 1].RegionState |= EFI_ALLOCATED;\r
-\r
- //\r
- // Reduce the size of the last SMRAM descriptor by EFI_PAGE_SIZE \r
- //\r
- NewDescriptorBlock->Descriptor[SmramRanges].PhysicalStart += EFI_PAGE_SIZE;\r
- NewDescriptorBlock->Descriptor[SmramRanges].CpuStart += EFI_PAGE_SIZE;\r
- NewDescriptorBlock->Descriptor[SmramRanges].PhysicalSize -= EFI_PAGE_SIZE;\r
-\r
- //\r
- // Now, we have created SmramReserve Hob for SmmAccess drive. But the issue is that, Framework SmmAccess will assume there is 2 SmramReserve region only.\r
- // Reporting 3 SmramReserve region will cause buffer overflow. Moreover, we would like to filter AB-SEG or H-SEG to avoid SMM cache-poisoning issue.\r
- // So we uses scan SmmReserve Hob to remove AB-SEG or H-SEG.\r
- //\r
- for (Index = 0; Index <= SmramRanges; Index++) {\r
- if (NewDescriptorBlock->Descriptor[Index].PhysicalSize == 0) {\r
- //\r
- // Skip zero entry\r
- //\r
- continue;\r
- }\r
- if (NewDescriptorBlock->Descriptor[Index].PhysicalStart < BASE_1MB) {\r
- //\r
- // Find AB-SEG or H-SEG\r
- // remove this region\r
- //\r
- for (SubIndex = Index; SubIndex < NewDescriptorBlock->NumberOfSmmReservedRegions - 1; SubIndex++) {\r
- CopyMem (&NewDescriptorBlock->Descriptor[SubIndex], &NewDescriptorBlock->Descriptor[SubIndex + 1], sizeof (EFI_SMRAM_DESCRIPTOR));\r
- }\r
- //\r
- // Zero last one\r
- //\r
- ZeroMem (&NewDescriptorBlock->Descriptor[SubIndex], sizeof(EFI_SMRAM_DESCRIPTOR));\r
- //\r
- // Decrease Number\r
- //\r
- NewDescriptorBlock->NumberOfSmmReservedRegions --;\r
- //\r
- // Decrease Index to let it test mew entry\r
- //\r
- Index --;\r
- }\r
- }\r
-\r
- //\r
- // Last step, we can scrub old one\r
- //\r
- ZeroMem (&GuidHob->Name, sizeof(GuidHob->Name));\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- This routine will create AcpiVariable hob to point the reserved smram in S3 phase\r
- for PI SMM core.\r
- \r
- @retval EFI_SUCCESS The gEfiAcpiVariableGuid is created successfully.\r
- @retval EFI_NOT_FOUND The gEfiSmmPeiSmramMemoryReserveGuid is not found.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-CreateAcpiVariableHob (\r
- VOID\r
- )\r
-{\r
- EFI_PEI_HOB_POINTERS Hob;\r
- EFI_SMRAM_HOB_DESCRIPTOR_BLOCK *DescriptorBlock;\r
- UINTN SmramRanges;\r
-\r
- //\r
- // Retrieve the GUID HOB data that contains the set of SMRAM descriptyors\r
- //\r
- DescriptorBlock = GetSrmamHobData ();\r
- if (DescriptorBlock == NULL) {\r
- return EFI_NOT_FOUND;\r
- }\r
-\r
- Hob.Raw = BuildGuidHob (\r
- &gEfiAcpiVariableGuid,\r
- sizeof (EFI_SMRAM_DESCRIPTOR)\r
- );\r
- ASSERT (Hob.Raw);\r
-\r
- //\r
- // It should be already patch, so just copy last but 1 region directly.\r
- //\r
- SmramRanges = DescriptorBlock->NumberOfSmmReservedRegions;\r
- ASSERT (SmramRanges >= 2);\r
- if (SmramRanges >= 2) {\r
- CopyMem ((VOID *)Hob.Raw, &DescriptorBlock->Descriptor[SmramRanges - 2], sizeof (EFI_SMRAM_DESCRIPTOR));\r
- }\r
-\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- Driver Entry for AcpiVariableHobOnSmramReservHob PEIM\r
- \r
- @param FileHandle Handle of the file being invoked.\r
- @param PeiServices Describes the list of possible PEI Services.\r
- \r
- @retval EFI_SUCCESS Success create gEfiAcpiVariableGuid and\r
- split gEfiSmmPeiSmramMemoryReserveGuid.\r
- @retval EFI_NOT_FOUND Can not get gEfiSmmPeiSmramMemoryReserveGuid hob\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-AcpiVariableHobEntry (\r
- IN EFI_PEI_FILE_HANDLE FileHandle,\r
- IN CONST EFI_PEI_SERVICES **PeiServices\r
- )\r
-{\r
- EFI_STATUS Status;\r
-\r
- //\r
- // Split SmramReserve hob, which is required for PI SMM Core for S3.\r
- //\r
- Status = SplitSmramReserveHob ();\r
- if (EFI_ERROR (Status)) {\r
- return Status;\r
- }\r
-\r
- //\r
- // Create AcpiVariable hob, which is required for PI SMM Core for S3.\r
- //\r
- Status = CreateAcpiVariableHob ();\r
-\r
- return Status;\r
-}\r
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