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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/** @file
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Flush the cache is required for most architectures while do capsule
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update. It is not support at Runtime.
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Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
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Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "CapsuleService.h"
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#include <Library/CacheMaintenanceLib.h>
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/**
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Writes Back a range of data cache lines covering a set of capsules in memory.
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Writes Back the data cache lines specified by ScatterGatherList.
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@param ScatterGatherList Physical address of the data structure that
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describes a set of capsules in memory
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**/
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VOID
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CapsuleCacheWriteBack (
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IN EFI_PHYSICAL_ADDRESS ScatterGatherList
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)
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{
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EFI_CAPSULE_BLOCK_DESCRIPTOR *Desc;
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if (!EfiAtRuntime ()) {
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Desc = (EFI_CAPSULE_BLOCK_DESCRIPTOR *)(UINTN)ScatterGatherList;
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do {
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WriteBackDataCacheRange (
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(VOID *)(UINTN)Desc,
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(UINTN)sizeof (*Desc)
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);
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if (Desc->Length > 0) {
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WriteBackDataCacheRange (
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(VOID *)(UINTN)Desc->Union.DataBlock,
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(UINTN)Desc->Length
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);
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Desc++;
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} else if (Desc->Union.ContinuationPointer > 0) {
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Desc = (EFI_CAPSULE_BLOCK_DESCRIPTOR *)(UINTN)Desc->Union.ContinuationPointer;
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}
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} while (Desc->Length > 0 || Desc->Union.ContinuationPointer > 0);
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WriteBackDataCacheRange (
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(VOID *)(UINTN)Desc,
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(UINTN)sizeof (*Desc)
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);
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}
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}
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