MdeModulePkg/CapsuleRuntimeDxe: Add cache flush for IA32 and X64

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

diff --git a/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleCache.c b/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleCache.c
new file mode 100644 (file)
index 0000000..ab81296
--- /dev/null
+++ b/MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleCache.c
@@ -0,0 +1,63 @@
+/** @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
+  This program and the accompanying materials are licensed and made available\r
+  under the terms and conditions of the BSD License which accompanies this\r
+  distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\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