diff options
Diffstat (limited to 'MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c')
| -rw-r--r-- | MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c b/MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c deleted file mode 100644 index dd0a78d653..0000000000 --- a/MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c +++ /dev/null @@ -1,131 +0,0 @@ -/** @file
- PEI Services Table Pointer Library for IA-32 and x64.
-
- According to PI specification, the peiservice pointer is stored prior at IDT
- table in IA32 and x64 architecture.
-
- Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include <PiPei.h>
-
-#include <Library/BaseLib.h>
-#include <Library/PeiServicesTablePointerLib.h>
-#include <Library/DebugLib.h>
-#include <Library/BaseMemoryLib.h>
-
-/**
- Retrieves the cached value of the PEI Services Table pointer.
-
- Returns the cached value of the PEI Services Table pointer in a CPU specific manner
- as specified in the CPU binding section of the Platform Initialization Pre-EFI
- Initialization Core Interface Specification.
-
- If the cached PEI Services Table pointer is NULL, then ASSERT().
-
- @return The pointer to PeiServices.
-
-**/
-CONST EFI_PEI_SERVICES **
-EFIAPI
-GetPeiServicesTablePointer (
- VOID
- )
-{
- CONST EFI_PEI_SERVICES **PeiServices;
- IA32_DESCRIPTOR Idtr;
-
- AsmReadIdtr (&Idtr);
- PeiServices = (CONST EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - sizeof (UINTN)));
- ASSERT (PeiServices != NULL);
- return PeiServices;
-}
-
-/**
- Caches a pointer PEI Services Table.
-
- Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer
- in a CPU specific manner as specified in the CPU binding section of the Platform Initialization
- Pre-EFI Initialization Core Interface Specification.
- The function set the pointer of PEI services immediately preceding the IDT table
- according to PI specification.
-
- If PeiServicesTablePointer is NULL, then ASSERT().
-
- @param PeiServicesTablePointer The address of PeiServices pointer.
-**/
-VOID
-EFIAPI
-SetPeiServicesTablePointer (
- IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
- )
-{
- IA32_DESCRIPTOR Idtr;
-
- ASSERT (PeiServicesTablePointer != NULL);
- AsmReadIdtr (&Idtr);
- (*(UINTN*)(Idtr.Base - sizeof (UINTN))) = (UINTN)PeiServicesTablePointer;
-}
-
-/**
- Perform CPU specific actions required to migrate the PEI Services Table
- pointer from temporary RAM to permanent RAM.
-
- For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes
- immediately preceding the Interrupt Descriptor Table (IDT) in memory.
- For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes
- immediately preceding the Interrupt Descriptor Table (IDT) in memory.
- For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in
- a dedicated CPU register. This means that there is no memory storage
- associated with storing the PEI Services Table pointer, so no additional
- migration actions are required for Itanium or ARM CPUs.
-
- If The cached PEI Services Table pointer is NULL, then ASSERT().
- If the permanent memory is allocated failed, then ASSERT().
-**/
-VOID
-EFIAPI
-MigratePeiServicesTablePointer (
- VOID
- )
-{
- EFI_STATUS Status;
- IA32_DESCRIPTOR Idtr;
- EFI_PHYSICAL_ADDRESS IdtBase;
- CONST EFI_PEI_SERVICES **PeiServices;
-
- //
- // Get PEI Services Table pointer
- //
- AsmReadIdtr (&Idtr);
- PeiServices = (CONST EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - sizeof (UINTN)));
- ASSERT (PeiServices != NULL);
- //
- // Allocate the permanent memory.
- //
- Status = (*PeiServices)->AllocatePages (
- PeiServices,
- EfiBootServicesCode,
- EFI_SIZE_TO_PAGES(Idtr.Limit + 1 + sizeof (UINTN)),
- &IdtBase
- );
- ASSERT_EFI_ERROR (Status);
- //
- // Idt table needs to be migrated into memory.
- //
- CopyMem ((VOID *) (UINTN) IdtBase, (VOID *) (Idtr.Base - sizeof (UINTN)), Idtr.Limit + 1 + sizeof (UINTN));
- Idtr.Base = (UINTN) IdtBase + sizeof (UINTN);
- AsmWriteIdtr (&Idtr);
-
- return;
-}
-
-
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