mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-23 11:35:19 +01:00
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/** @file
|
|
Provides a service to retrieve a pointer to the PEI Services Table.
|
|
|
|
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef __PEI_SERVICES_TABLE_POINTER_LIB_H__
|
|
#define __PEI_SERVICES_TABLE_POINTER_LIB_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
|
|
);
|
|
|
|
/**
|
|
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.
|
|
|
|
If PeiServicesTablePointer is NULL, then ASSERT().
|
|
|
|
@param PeiServicesTablePointer The address of PeiServices pointer.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
SetPeiServicesTablePointer (
|
|
IN CONST EFI_PEI_SERVICES ** 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.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
MigratePeiServicesTablePointer (
|
|
VOID
|
|
);
|
|
|
|
#endif
|
|
|