f977e6500a
The ARM architecture provides no reliable way to clean or invalidate the entire data cache at runtime. The reason is that such maintenance requires the use of set/way maintenance operations, which are suitable only for the kind of maintenance that is carried out when the cache is taken offline entirely. So ASSERT () when any of the CacheMaintenanceLib whole data cache routines are invoked rather than pretending we can do anything meaningful here. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18756 6f19259b-4bc3-4df7-8a09-765794883524
122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
/** @file
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Base.h>
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#include <Library/ArmLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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VOID
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CacheRangeOperation (
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IN VOID *Start,
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IN UINTN Length,
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IN LINE_OPERATION LineOperation
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)
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{
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UINTN ArmCacheLineLength = ArmDataCacheLineLength();
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UINTN ArmCacheLineAlignmentMask = ArmCacheLineLength - 1;
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// Align address (rounding down)
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UINTN AlignedAddress = (UINTN)Start - ((UINTN)Start & ArmCacheLineAlignmentMask);
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UINTN EndAddress = (UINTN)Start + Length;
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// Perform the line operation on an address in each cache line
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while (AlignedAddress < EndAddress) {
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LineOperation(AlignedAddress);
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AlignedAddress += ArmCacheLineLength;
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}
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ArmDataSynchronizationBarrier ();
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}
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VOID
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EFIAPI
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InvalidateInstructionCache (
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VOID
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)
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{
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ArmInvalidateInstructionCache();
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}
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VOID
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EFIAPI
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InvalidateDataCache (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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VOID *
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EFIAPI
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InvalidateInstructionCacheRange (
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IN VOID *Address,
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IN UINTN Length
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)
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{
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CacheRangeOperation (Address, Length, ArmCleanDataCacheEntryByMVA);
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ArmInvalidateInstructionCache ();
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return Address;
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}
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VOID
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EFIAPI
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WriteBackInvalidateDataCache (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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VOID *
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EFIAPI
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WriteBackInvalidateDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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)
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{
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CacheRangeOperation(Address, Length, ArmCleanInvalidateDataCacheEntryByMVA);
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return Address;
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}
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VOID
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EFIAPI
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WriteBackDataCache (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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VOID *
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EFIAPI
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WriteBackDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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)
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{
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CacheRangeOperation(Address, Length, ArmCleanDataCacheEntryByMVA);
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return Address;
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}
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VOID *
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EFIAPI
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InvalidateDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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)
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{
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CacheRangeOperation(Address, Length, ArmInvalidateDataCacheEntryByMVA);
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return Address;
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}
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