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/** @file
PEI Services Table Pointer Library implementation for IPF that uses Kernel
Register 7 to store the pointer.
Copyright (c) 2006 - 2007, Intel Corporation.<BR>
All rights reserved. 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/DebugLib.h>
/**
The function returns the pointer to PeiServices.
The function returns the pointer to PeiServices.
It will ASSERT() if the pointer to PeiServices is NULL.
@return The pointer to PeiServices.
**/
EFI_PEI_SERVICES **
EFIAPI
GetPeiServicesTablePointer (
VOID
)
{
EFI_PEI_SERVICES **PeiServices;
PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr7 ();
ASSERT (PeiServices != NULL);
return PeiServices;
}
/**
The constructor function caches the pointer to PEI services.
The constructor function caches the pointer to PEI services.
It will always return EFI_SUCCESS.
@param FfsHeader Pointer to FFS header the loaded driver.
@param PeiServices Pointer to the PEI services.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
PeiServicesTablePointerLibConstructor (
IN EFI_PEI_FILE_HANDLE *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
{
AsmWriteKr7 ((UINT64)(UINTN)PeiServices);
return EFI_SUCCESS;
}
/**
The function set the pointer of PEI services immediately preceding the IDT table
according to PI specification.
@param PeiServices The address of PeiServices pointer.
**/
VOID
EFIAPI
SetPeiServicesTablePointer (
EFI_PEI_SERVICES ** PeiServicesTablePointer
)
{
AsmWriteKr7 ((UINT64)(UINTN)PeiServicesTablePointer);
}
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