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/** @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;
}
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