1 files changed, 110 insertions, 0 deletions
diff --git a/BraswellPlatformPkg/Common/PcdConfigHook/DxePcdConfigHook.c b/BraswellPlatformPkg/Common/PcdConfigHook/DxePcdConfigHook.c
new file mode 100644
index 0000000000..2de67f3a5f
--- /dev/null
+++ b/BraswellPlatformPkg/Common/PcdConfigHook/DxePcdConfigHook.c
@@ -0,0 +1,110 @@
+/** @file
+  PCD DXE driver manage all PCD entry initialized in PEI phase and DXE phase, and
+  produce the implementation of native PCD protocol and EFI_PCD_PROTOCOL defined in
+  PI 1.2 Vol3.
+
+  Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiDxe.h>
+#include <Protocol/PiPcd.h>
+#include <Library/PcdLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Guid/SetupVariable.h>
+
+typedef struct {
+  GUID    *PcdGuid;
+  UINTN   Token;
+  CHAR16  *VarName;
+  GUID    *VarGuid;
+  UINTN   Size;
+  UINT32  Attributes;
+} PCD_HOOK_STRUCT;
+
+PCD_HOOK_STRUCT  mPcdHookToken[] = {
+  {&gEfiEdkIIPlatformTokenSpaceGuid, 0, L"Setup", &gEfiSetupVariableGuid, sizeof(SYSTEM_CONFIGURATION), EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS},
+};
+
+PCD_HOOK_STRUCT *
+GetPcdHookStructByToken (
+  IN UINTN Token
+  )
+{
+  UINTN  Index;
+
+  for (Index = 0; Index < sizeof(mPcdHookToken)/sizeof(mPcdHookToken[0]); Index++) {
+    if (mPcdHookToken[Index].Token == Token) {
+      return &mPcdHookToken[Index];
+    }
+  }
+  return NULL;
+}
+
+EFI_STATUS
+EFIAPI
+PcdAccessOnSetHook (
+  IN     EFI_GUID *Guid     OPTIONAL,
+  IN     UINTN    CallBackToken,
+  IN     VOID     *TokenData,
+  IN     UINTN    TokenDataSize
+  )
+{
+  PCD_HOOK_STRUCT                 *PcdHookStruct;
+  EFI_STATUS                      Status;
+
+  DEBUG ((EFI_D_INFO, "PcdAccessOnSetHook - 0x%x\n", CallBackToken));
+
+  PcdHookStruct = GetPcdHookStructByToken (CallBackToken);
+  ASSERT (PcdHookStruct == NULL);
+
+  Status  = gRT->SetVariable (
+                   PcdHookStruct->VarName,
+                   PcdHookStruct->VarGuid,
+                   PcdHookStruct->Attributes,
+                   TokenDataSize,
+                   TokenData
+                   );
+  DEBUG ((EFI_D_INFO, "PcdAccessOnSetHook - %r\n", Status));
+
+  return Status;
+}
+
+EFI_STATUS
+EFIAPI
+DxePcdConfigHookEntrypoint (
+  IN EFI_HANDLE           ImageHandle,
+  IN EFI_SYSTEM_TABLE     *SystemTable
+  )
+{
+  EFI_STATUS          Status;
+  EFI_PCD_PROTOCOL    *PcdProtocol;
+  UINTN               Index;
+
+  Status = gBS->LocateProtocol (
+                  &gEfiPcdProtocolGuid,
+                  NULL,
+                  &PcdProtocol
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  mPcdHookToken[0].Token = PcdTokenEx(&gEfiEdkIIPlatformTokenSpaceGuid, PcdSystemConfiguration);
+
+  for (Index = 0; Index < sizeof(mPcdHookToken)/sizeof(mPcdHookToken[0]); Index++) {
+    Status = PcdProtocol->CallbackOnSet (mPcdHookToken[Index].PcdGuid, mPcdHookToken[Index].Token, PcdAccessOnSetHook);
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  return EFI_SUCCESS;
+}