PeiServicesTablePointer.c File Reference

#include <PiPei.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/ArmLib.h>
#include <Library/DebugLib.h>

Go to the source code of this file.

Functions
VOID EFIAPI	SetPeiServicesTablePointer (IN CONST EFI_PEI_SERVICES **PeiServicesTablePointer)
CONST EFI_PEI_SERVICES **EFIAPI	GetPeiServicesTablePointer (VOID)
VOID EFIAPI	MigratePeiServicesTablePointer (VOID)

Detailed Description

PEI Services Table Pointer Library.

This library is used for PEIM which does executed from flash device directly but executed in memory.

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file PeiServicesTablePointer.c.

Function Documentation

GetPeiServicesTablePointer()

CONST EFI_PEI_SERVICES **EFIAPI GetPeiServicesTablePointer

(

VOID

)

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().

Returns

The pointer to PeiServices.

Definition at line 51 of file PeiServicesTablePointer.c.

MigratePeiServicesTablePointer()

VOID EFIAPI MigratePeiServicesTablePointer

(

VOID

)

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.

Definition at line 74 of file PeiServicesTablePointer.c.

SetPeiServicesTablePointer()

VOID EFIAPI SetPeiServicesTablePointer

(

IN CONST EFI_PEI_SERVICES **

PeiServicesTablePointer

)

Caches a pointer PEI Services Table.

Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer in a platform specific manner.

If PeiServicesTablePointer is NULL, then ASSERT().

Parameters

PeiServicesTablePointer

The address of PeiServices pointer.

Definition at line 30 of file PeiServicesTablePointer.c.