-/** @file\r
- PEI Services Table Pointer Library.\r
-\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. 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
- 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
- Module Name: PeiServicesTablePointer.c\r
-\r
-**/\r
-\r
-\r
-#include <PiPei.h>\r
-\r
-\r
-#include <Library/PeiServicesTablePointerLib.h>\r
-#include <Library/BaseLib.h>\r
-#include <Library/DebugLib.h>\r
-#include <Library/BaseMemoryLib.h>\r
-#include <Library/PeiServicesLib.h>\r
-\r
-VOID\r
-EFIAPI\r
-SetPeiServicesTablePointer (\r
- IN EFI_PEI_SERVICES **PeiServices\r
- )\r
-{\r
- AsmWriteMm7 ((UINT64)(UINTN)PeiServices);\r
-}\r
-\r
-/**\r
- The function returns the pointer to PeiServices.\r
-\r
- The function returns the pointer to PeiServices.\r
- It will ASSERT() if the pointer to PeiServices is NULL.\r
-\r
- @retval The pointer to PeiServices.\r
-\r
-**/\r
-EFI_PEI_SERVICES **\r
-EFIAPI\r
-GetPeiServicesTablePointer (\r
- VOID\r
- )\r
-{\r
- EFI_PEI_SERVICES **PeiServices;\r
-\r
- PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadMm7 ();\r
- ASSERT (PeiServices != NULL);\r
- return PeiServices;\r
-}\r
-\r
-/**\r
- The constructor function caches the pointer to PEI services.\r
-\r
- The constructor function caches the pointer to PEI services.\r
- It will always return EFI_SUCCESS.\r
-\r
- @param FfsHeader Pointer to FFS header the loaded driver.\r
- @param PeiServices Pointer to the PEI services.\r
-\r
- @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r
-\r
-**/\r
-EFI_STATUS\r
-EFIAPI\r
-PeiServicesTablePointerLibConstructor (\r
- IN EFI_PEI_FILE_HANDLE *FfsHeader,\r
- IN EFI_PEI_SERVICES **PeiServices\r
- )\r
-{\r
- AsmWriteMm7 ((UINT64)(UINTN)PeiServices);\r
- return EFI_SUCCESS;\r
-}\r
-\r
-/**\r
- After memory initialization in PEI phase, the IDT table in temporary memory should \r
- be migrated to memory, and the address of PeiServicesPointer also need to be updated \r
- immediately preceding the new IDT table.\r
- \r
- @param PeiServices The address of PeiServices pointer.\r
-**/\r
-VOID\r
-MigrateIdtTable (\r
- IN EFI_PEI_SERVICES **PeiServices\r
- )\r
-{\r
- UINTN Size;\r
- VOID *NewBase;\r
- EFI_STATUS Status;\r
- IA32_DESCRIPTOR Idtr;\r
- \r
- AsmReadIdtr (&Idtr);\r
- \r
- Size = Idtr.Limit + 1;\r
- \r
- Status = PeiServicesAllocatePool (Size, &NewBase);\r
- ASSERT_EFI_ERROR (Status);\r
- \r
- CopyMem (NewBase, (VOID*)Idtr.Base, Size);\r
- \r
- Idtr.Base = (UINTN)NewBase;\r
- AsmWriteIdtr (&Idtr);\r
-}\r
-\r