mirror of
https://github.com/acidanthera/audk.git
synced 2025-08-19 16:48:09 +02:00
87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
/** @file
|
|
|
|
Copyright (c) 2016, Linaro Limited. All rights reserved.
|
|
Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
*/
|
|
|
|
#include <Base.h>
|
|
|
|
#include <Library/ArmLib.h>
|
|
#include <Library/ArmMmuLib.h>
|
|
#include <Library/CacheMaintenanceLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/HobLib.h>
|
|
#include "ArmMmuLibInternal.h"
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
ArmMmuPeiLibConstructor (
|
|
IN EFI_PEI_FILE_HANDLE FileHandle,
|
|
IN CONST EFI_PEI_SERVICES **PeiServices
|
|
)
|
|
{
|
|
extern UINT32 ArmReplaceLiveTranslationEntrySize;
|
|
ARM_REPLACE_LIVE_TRANSLATION_ENTRY ArmReplaceLiveTranslationEntryFunc;
|
|
UINTN ArmReplaceLiveTranslationEntryEnd;
|
|
VOID *Hob;
|
|
|
|
EFI_FV_FILE_INFO FileInfo;
|
|
EFI_STATUS Status;
|
|
|
|
ASSERT (FileHandle != NULL);
|
|
|
|
ArmReplaceLiveTranslationEntryEnd = (UINTN)ArmReplaceLiveTranslationEntry + ArmReplaceLiveTranslationEntrySize;
|
|
|
|
//
|
|
// Align this routine to a log2 upper bound of its size, so that it is
|
|
// guaranteed not to cross a page or block boundary
|
|
// (see ArmMmuLibReplaceEntry.S).
|
|
//
|
|
ASSERT (IS_ALIGNED ((UINTN)ArmReplaceLiveTranslationEntry, 0x200));
|
|
ASSERT (((UINTN)ArmReplaceLiveTranslationEntry >> EFI_PAGE_SHIFT) == ((ArmReplaceLiveTranslationEntryEnd - 1) >> EFI_PAGE_SHIFT));
|
|
|
|
Status = (*PeiServices)->FfsGetFileInfo (FileHandle, &FileInfo);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Some platforms do not cope very well with cache maintenance being
|
|
// performed on regions backed by NOR flash. Since the firmware image
|
|
// can be assumed to be clean to the PoC when running XIP, even when PEI
|
|
// is executing from DRAM, we only need to perform the cache maintenance
|
|
// when not executing in place.
|
|
//
|
|
if (((UINTN)FileInfo.Buffer <= (UINTN)ArmReplaceLiveTranslationEntry) &&
|
|
((UINTN)FileInfo.Buffer + FileInfo.BufferSize >= ArmReplaceLiveTranslationEntryEnd))
|
|
{
|
|
DEBUG ((DEBUG_INFO, "ArmMmuLib: skipping cache maintenance on XIP PEIM\n"));
|
|
|
|
//
|
|
// Expose the XIP version of the ArmReplaceLiveTranslationEntry() routine
|
|
// via a HOB so we can fall back to it later when we need to split block
|
|
// mappings in a way that adheres to break-before-make requirements.
|
|
//
|
|
ArmReplaceLiveTranslationEntryFunc = ArmReplaceLiveTranslationEntry;
|
|
|
|
Hob = BuildGuidDataHob (
|
|
&gArmMmuReplaceLiveTranslationEntryFuncGuid,
|
|
&ArmReplaceLiveTranslationEntryFunc,
|
|
sizeof ArmReplaceLiveTranslationEntryFunc
|
|
);
|
|
ASSERT (Hob != NULL);
|
|
} else {
|
|
DEBUG ((DEBUG_INFO, "ArmMmuLib: performing cache maintenance on shadowed PEIM\n"));
|
|
//
|
|
// The ArmReplaceLiveTranslationEntry () helper function may be invoked
|
|
// with the MMU off so we have to ensure that it gets cleaned to the PoC
|
|
//
|
|
WriteBackDataCacheRange (
|
|
(VOID *)(UINTN)ArmReplaceLiveTranslationEntry,
|
|
ArmReplaceLiveTranslationEntrySize
|
|
);
|
|
}
|
|
|
|
return RETURN_SUCCESS;
|
|
}
|