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/*++
Copyright (c) 2004, Intel Corporation
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.
Module Name:
SwitchToCacheMode.c
Abstract:
Ipf CAR specific function used to switch to cache mode for the later memory access
Revision History
--*/
#include "Tiano.h"
#include "PeiCore.h"
#include "IpfCpuCore.i"
extern
SAL_RETURN_REGS
GetHandOffStatus (
VOID
);
VOID
SwitchToCacheMode (
IN PEI_CORE_INSTANCE *CoreData
)
/*++
Routine Description:
Switch the PHIT pointers to cache mode after InstallPeiMemory in CAR.
Arguments:
CoreData - The PEI core Private Data
Returns:
--*/
{
EFI_HOB_HANDOFF_INFO_TABLE *Phit;
if (CoreData == NULL) {
//
// the first call with CoreData as NULL.
//
return;
}
if ((GetHandOffStatus().r10 & 0xFF) == RecoveryFn) {
CoreData->StackBase = CoreData->StackBase & CACHE_MODE_ADDRESS_MASK;
CoreData->HobList.Raw = (UINT8 *)((UINTN)CoreData->HobList.Raw & CACHE_MODE_ADDRESS_MASK);
//
// Change the PHIT pointer value to cache mode
//
Phit = CoreData->HobList.HandoffInformationTable;
Phit->EfiMemoryTop = Phit->EfiMemoryTop & CACHE_MODE_ADDRESS_MASK;
Phit->EfiFreeMemoryTop = Phit->EfiFreeMemoryTop & CACHE_MODE_ADDRESS_MASK;
Phit->EfiMemoryBottom = Phit->EfiMemoryBottom & CACHE_MODE_ADDRESS_MASK;
Phit->EfiFreeMemoryBottom = Phit->EfiFreeMemoryBottom & CACHE_MODE_ADDRESS_MASK;
Phit->EfiEndOfHobList = Phit->EfiEndOfHobList & CACHE_MODE_ADDRESS_MASK;
}
return;
}
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