MdeModulePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdeModulePkg / Universal / CapsuleRuntimeDxe / CapsuleCache.c

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