diff options
Diffstat (limited to 'Platform/BroxtonPlatformPkg/Common/SampleCode/MdeModulePkg/Universal/PCD/Pei/Pcd.c')
| -rw-r--r-- | Platform/BroxtonPlatformPkg/Common/SampleCode/MdeModulePkg/Universal/PCD/Pei/Pcd.c | 1678 |
1 files changed, 1678 insertions, 0 deletions
diff --git a/Platform/BroxtonPlatformPkg/Common/SampleCode/MdeModulePkg/Universal/PCD/Pei/Pcd.c b/Platform/BroxtonPlatformPkg/Common/SampleCode/MdeModulePkg/Universal/PCD/Pei/Pcd.c new file mode 100644 index 0000000000..8d9328b544 --- /dev/null +++ b/Platform/BroxtonPlatformPkg/Common/SampleCode/MdeModulePkg/Universal/PCD/Pei/Pcd.c @@ -0,0 +1,1678 @@ +/** @file
+ All Pcd Ppi services are implemented here.
+
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2016 Hewlett Packard Enterprise Development LP<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 "Service.h"
+
+///
+/// Instance of PCD_PPI protocol is EDKII native implementation.
+/// This protocol instance support dynamic and dynamicEx type PCDs.
+///
+PCD_PPI mPcdPpiInstance = {
+ PeiPcdSetSku,
+
+ PeiPcdGet8,
+ PeiPcdGet16,
+ PeiPcdGet32,
+ PeiPcdGet64,
+ PeiPcdGetPtr,
+ PeiPcdGetBool,
+ PeiPcdGetSize,
+
+ PeiPcdGet8Ex,
+ PeiPcdGet16Ex,
+ PeiPcdGet32Ex,
+ PeiPcdGet64Ex,
+ PeiPcdGetPtrEx,
+ PeiPcdGetBoolEx,
+ PeiPcdGetSizeEx,
+
+ PeiPcdSet8,
+ PeiPcdSet16,
+ PeiPcdSet32,
+ PeiPcdSet64,
+ PeiPcdSetPtr,
+ PeiPcdSetBool,
+
+ PeiPcdSet8Ex,
+ PeiPcdSet16Ex,
+ PeiPcdSet32Ex,
+ PeiPcdSet64Ex,
+ PeiPcdSetPtrEx,
+ PeiPcdSetBoolEx,
+
+ PeiRegisterCallBackOnSet,
+ PcdUnRegisterCallBackOnSet,
+ PeiPcdGetNextToken,
+ PeiPcdGetNextTokenSpace
+};
+
+///
+/// Instance of EFI_PEI_PCD_PPI which is defined in PI 1.2 Vol 3.
+/// This PPI instance only support dyanmicEx type PCD.
+///
+EFI_PEI_PCD_PPI mEfiPcdPpiInstance = {
+ PeiPcdSetSku,
+
+ PeiPcdGet8Ex,
+ PeiPcdGet16Ex,
+ PeiPcdGet32Ex,
+ PeiPcdGet64Ex,
+ PeiPcdGetPtrEx,
+ PeiPcdGetBoolEx,
+ PeiPcdGetSizeEx,
+ PeiPcdSet8Ex,
+ PeiPcdSet16Ex,
+ PeiPcdSet32Ex,
+ PeiPcdSet64Ex,
+ PeiPcdSetPtrEx,
+ PeiPcdSetBoolEx,
+ (EFI_PEI_PCD_PPI_CALLBACK_ON_SET) PeiRegisterCallBackOnSet,
+ (EFI_PEI_PCD_PPI_CANCEL_CALLBACK) PcdUnRegisterCallBackOnSet,
+ PeiPcdGetNextToken,
+ PeiPcdGetNextTokenSpace
+};
+
+///
+/// Instance of GET_PCD_INFO_PPI protocol is EDKII native implementation.
+/// This protocol instance support dynamic and dynamicEx type PCDs.
+///
+GET_PCD_INFO_PPI mGetPcdInfoInstance = {
+ PeiGetPcdInfoGetInfo,
+ PeiGetPcdInfoGetInfoEx,
+ PeiGetPcdInfoGetSku
+};
+
+///
+/// Instance of EFI_GET_PCD_INFO_PPI which is defined in PI 1.2.1 Vol 3.
+/// This PPI instance only support dyanmicEx type PCD.
+///
+EFI_GET_PCD_INFO_PPI mEfiGetPcdInfoInstance = {
+ PeiGetPcdInfoGetInfoEx,
+ PeiGetPcdInfoGetSku
+};
+
+EFI_PEI_PPI_DESCRIPTOR mPpiList[] = {
+ {
+ EFI_PEI_PPI_DESCRIPTOR_PPI,
+ &gPcdPpiGuid,
+ &mPcdPpiInstance
+ },
+ {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiPeiPcdPpiGuid,
+ &mEfiPcdPpiInstance
+ }
+};
+
+EFI_PEI_PPI_DESCRIPTOR mPpiList2[] = {
+ {
+ EFI_PEI_PPI_DESCRIPTOR_PPI,
+ &gGetPcdInfoPpiGuid,
+ &mGetPcdInfoInstance
+ },
+ {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiGetPcdInfoPpiGuid,
+ &mEfiGetPcdInfoInstance
+ }
+};
+
+/**
+ Callback on SET PcdSetNvStoreDefaultId
+
+ Once PcdSetNvStoreDefaultId is set, the default NV storage will be found from
+ PcdNvStoreDefaultValueBuffer, and built into VariableHob.
+
+ @param[in] CallBackGuid The PCD token GUID being set.
+ @param[in] CallBackToken The PCD token number being set.
+ @param[in, out] TokenData A pointer to the token data being set.
+ @param[in] TokenDataSize The size, in bytes, of the data being set.
+
+**/
+VOID
+EFIAPI
+PcdSetNvStoreDefaultIdCallBack (
+ IN CONST EFI_GUID *CallBackGuid, OPTIONAL
+ IN UINTN CallBackToken,
+ IN OUT VOID *TokenData,
+ IN UINTN TokenDataSize
+ )
+{
+ EFI_STATUS Status;
+ UINT16 DefaultId;
+ SKU_ID SkuId;
+ UINTN FullSize;
+ UINTN Index;
+ UINT8 *DataBuffer;
+ UINT8 *VarStoreHobData;
+ UINT8 *BufferEnd;
+ BOOLEAN IsFound;
+ VARIABLE_STORE_HEADER *NvStoreBuffer;
+ PCD_DEFAULT_DATA *DataHeader;
+ PCD_DEFAULT_INFO *DefaultInfo;
+ PCD_DATA_DELTA *DeltaData;
+
+ DefaultId = *(UINT16 *) TokenData;
+ SkuId = GetPcdDatabase()->SystemSkuId;
+ IsFound = FALSE;
+
+ if (PeiPcdGetSizeEx (&gEfiMdeModulePkgTokenSpaceGuid, PcdToken (PcdNvStoreDefaultValueBuffer)) > sizeof (PCD_NV_STORE_DEFAULT_BUFFER_HEADER)) {
+ DataBuffer = (UINT8 *) PeiPcdGetPtrEx (&gEfiMdeModulePkgTokenSpaceGuid, PcdToken (PcdNvStoreDefaultValueBuffer));
+ FullSize = ((PCD_NV_STORE_DEFAULT_BUFFER_HEADER *) DataBuffer)->Length;
+ DataHeader = (PCD_DEFAULT_DATA *) (DataBuffer + sizeof (PCD_NV_STORE_DEFAULT_BUFFER_HEADER));
+ //
+ // The first section data includes NV storage default setting.
+ //
+ NvStoreBuffer = (VARIABLE_STORE_HEADER *) ((UINT8 *) DataHeader + sizeof (DataHeader->DataSize) + DataHeader->HeaderSize);
+ VarStoreHobData = (UINT8 *) BuildGuidHob (&NvStoreBuffer->Signature, NvStoreBuffer->Size);
+ ASSERT (VarStoreHobData != NULL);
+ CopyMem (VarStoreHobData, NvStoreBuffer, NvStoreBuffer->Size);
+ //
+ // Find the matched SkuId and DefaultId in the first section
+ //
+ DefaultInfo = &(DataHeader->DefaultInfo[0]);
+ BufferEnd = (UINT8 *) DataHeader + sizeof (DataHeader->DataSize) + DataHeader->HeaderSize;
+ while ((UINT8 *) DefaultInfo < BufferEnd) {
+ if (DefaultInfo->DefaultId == DefaultId && DefaultInfo->SkuId == SkuId) {
+ IsFound = TRUE;
+ break;
+ }
+ DefaultInfo ++;
+ }
+ //
+ // Find the matched SkuId and DefaultId in the remaining section
+ //
+ Index = sizeof (PCD_NV_STORE_DEFAULT_BUFFER_HEADER) + ((DataHeader->DataSize + 7) & (~7));
+ DataHeader = (PCD_DEFAULT_DATA *) (DataBuffer + Index);
+ while (!IsFound && Index < FullSize && DataHeader->DataSize != 0xFFFFFFFF) {
+ DefaultInfo = &(DataHeader->DefaultInfo[0]);
+ BufferEnd = (UINT8 *) DataHeader + sizeof (DataHeader->DataSize) + DataHeader->HeaderSize;
+ while ((UINT8 *) DefaultInfo < BufferEnd) {
+ if (DefaultInfo->DefaultId == DefaultId && DefaultInfo->SkuId == SkuId) {
+ IsFound = TRUE;
+ break;
+ }
+ DefaultInfo ++;
+ }
+ if (IsFound) {
+ DeltaData = (PCD_DATA_DELTA *) BufferEnd;
+ BufferEnd = (UINT8 *) DataHeader + DataHeader->DataSize;
+ while ((UINT8 *) DeltaData < BufferEnd) {
+ *(VarStoreHobData + DeltaData->Offset) = (UINT8) DeltaData->Value;
+ DeltaData ++;
+ }
+ break;
+ }
+ Index = (Index + DataHeader->DataSize + 7) & (~7) ;
+ DataHeader = (PCD_DEFAULT_DATA *) (DataBuffer + Index);
+ }
+ }
+
+ Status = PcdUnRegisterCallBackOnSet (
+ &gEfiMdeModulePkgTokenSpaceGuid,
+ PcdToken(PcdSetNvStoreDefaultId),
+ PcdSetNvStoreDefaultIdCallBack
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+ Report Pei PCD database of all SKUs as Guid HOB so that DxePcd can access it.
+
+ @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
+ @param NotifyDescriptor Address of the notification descriptor data structure.
+ @param Ppi Address of the PPI that was installed.
+
+ @retval EFI_SUCCESS Successfully update the Boot records.
+**/
+EFI_STATUS
+EFIAPI
+EndOfPeiSignalPpiNotifyCallback (
+ IN EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
+ IN VOID *Ppi
+ )
+{
+ PEI_PCD_DATABASE *Database;
+ EFI_BOOT_MODE BootMode;
+ EFI_STATUS Status;
+ UINTN Instance;
+ EFI_PEI_FV_HANDLE VolumeHandle;
+ EFI_PEI_FILE_HANDLE FileHandle;
+ VOID *PcdDb;
+ UINT32 Length;
+ PEI_PCD_DATABASE *PeiPcdDb;
+
+ Status = PeiServicesGetBootMode(&BootMode);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Don't need to report it on S3 boot.
+ //
+ if (BootMode == BOOT_ON_S3_RESUME) {
+ return EFI_SUCCESS;
+ }
+
+ PeiPcdDb = GetPcdDatabase();
+ if (PeiPcdDb->SystemSkuId != (SKU_ID) 0) {
+ //
+ // SkuId has been set. Don't need to report it to DXE phase.
+ //
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Get full PCD database from PcdPeim FileHandle
+ //
+ Instance = 0;
+ FileHandle = NULL;
+ while (TRUE) {
+ //
+ // Traverse all firmware volume instances
+ //
+ Status = PeiServicesFfsFindNextVolume (Instance, &VolumeHandle);
+ //
+ // Error should not happen
+ //
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Find PcdDb file from the beginning in this firmware volume.
+ //
+ FileHandle = NULL;
+ Status = PeiServicesFfsFindFileByName (&gEfiCallerIdGuid, VolumeHandle, &FileHandle);
+ if (!EFI_ERROR (Status)) {
+ //
+ // Find PcdPeim FileHandle in this volume
+ //
+ break;
+ }
+ //
+ // We cannot find PcdPeim in this firmware volume, then search the next volume.
+ //
+ Instance++;
+ }
+
+ //
+ // Find PEI PcdDb and Build second PcdDB GuidHob
+ //
+ Status = PeiServicesFfsFindSectionData (EFI_SECTION_RAW, FileHandle, &PcdDb);
+ ASSERT_EFI_ERROR (Status);
+ Length = PeiPcdDb->LengthForAllSkus;
+ Database = BuildGuidHob (&gPcdDataBaseHobGuid, Length);
+ CopyMem (Database, PcdDb, Length);
+
+ return EFI_SUCCESS;
+}
+
+EFI_PEI_NOTIFY_DESCRIPTOR mEndOfPeiSignalPpiNotifyList[] = {
+ {
+ (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiEndOfPeiSignalPpiGuid,
+ EndOfPeiSignalPpiNotifyCallback
+ }
+};
+
+/**
+ Main entry for PCD PEIM driver.
+
+ This routine initialize the PCD database for PEI phase and install PCD_PPI/EFI_PEI_PCD_PPI.
+
+ @param FileHandle Handle of the file being invoked.
+ @param PeiServices Describes the list of possible PEI Services.
+
+ @return Status of install PCD_PPI
+
+**/
+EFI_STATUS
+EFIAPI
+PcdPeimInit (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ EFI_STATUS Status;
+
+ BuildPcdDatabase (FileHandle);
+
+ //
+ // Install PCD_PPI and EFI_PEI_PCD_PPI.
+ //
+ Status = PeiServicesInstallPpi (&mPpiList[0]);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Install GET_PCD_INFO_PPI and EFI_GET_PCD_INFO_PPI.
+ //
+ Status = PeiServicesInstallPpi (&mPpiList2[0]);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = PeiServicesNotifyPpi (&mEndOfPeiSignalPpiNotifyList[0]);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = PeiRegisterCallBackOnSet (
+ &gEfiMdeModulePkgTokenSpaceGuid,
+ PcdToken(PcdSetNvStoreDefaultId),
+ PcdSetNvStoreDefaultIdCallBack
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+/**
+ Retrieve additional information associated with a PCD token in the default token space.
+
+ This includes information such as the type of value the TokenNumber is associated with as well as possible
+ human readable name that is associated with the token.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[out] PcdInfo The returned information associated with the requested TokenNumber.
+ The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName.
+
+ @retval EFI_SUCCESS The PCD information was returned successfully.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+**/
+EFI_STATUS
+EFIAPI
+PeiGetPcdInfoGetInfo (
+ IN UINTN TokenNumber,
+ OUT EFI_PCD_INFO *PcdInfo
+ )
+{
+ return PeiGetPcdInfo (NULL, TokenNumber, PcdInfo);
+}
+
+/**
+ Retrieve additional information associated with a PCD token.
+
+ This includes information such as the type of value the TokenNumber is associated with as well as possible
+ human readable name that is associated with the token.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] TokenNumber The PCD token number.
+ @param[out] PcdInfo The returned information associated with the requested TokenNumber.
+ The caller is responsible for freeing the buffer that is allocated by callee for PcdInfo->PcdName.
+
+ @retval EFI_SUCCESS The PCD information was returned successfully.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+**/
+EFI_STATUS
+EFIAPI
+PeiGetPcdInfoGetInfoEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN TokenNumber,
+ OUT EFI_PCD_INFO *PcdInfo
+ )
+{
+ return PeiGetPcdInfo (Guid, TokenNumber, PcdInfo);
+}
+
+/**
+ Retrieve the currently set SKU Id.
+
+ @return The currently set SKU Id. If the platform has not set at a SKU Id, then the
+ default SKU Id value of 0 is returned. If the platform has set a SKU Id, then the currently set SKU
+ Id is returned.
+**/
+UINTN
+EFIAPI
+PeiGetPcdInfoGetSku (
+ VOID
+ )
+{
+ return (UINTN) GetPcdDatabase()->SystemSkuId;
+}
+
+/**
+ Sets the SKU value for subsequent calls to set or get PCD token values.
+
+ SetSku() sets the SKU Id to be used for subsequent calls to set or get PCD values.
+ SetSku() is normally called only once by the system.
+
+ For each item (token), the database can hold a single value that applies to all SKUs,
+ or multiple values, where each value is associated with a specific SKU Id. Items with multiple,
+ SKU-specific values are called SKU enabled.
+
+ The SKU Id of zero is reserved as a default.
+ For tokens that are not SKU enabled, the system ignores any set SKU Id and works with the
+ single value for that token. For SKU-enabled tokens, the system will use the SKU Id set by the
+ last call to SetSku(). If no SKU Id is set or the currently set SKU Id isn't valid for the specified token,
+ the system uses the default SKU Id. If the system attempts to use the default SKU Id and no value has been
+ set for that Id, the results are unpredictable.
+
+ @param[in] SkuId The SKU value that will be used when the PCD service will retrieve and
+ set values associated with a PCD token.
+
+**/
+VOID
+EFIAPI
+PeiPcdSetSku (
+ IN UINTN SkuId
+ )
+{
+ PEI_PCD_DATABASE *PeiPcdDb;
+ SKU_ID *SkuIdTable;
+ UINTN Index;
+ EFI_STATUS Status;
+ UINTN Instance;
+ EFI_PEI_FV_HANDLE VolumeHandle;
+ EFI_PEI_FILE_HANDLE FileHandle;
+ VOID *PcdDb;
+ UINT32 Length;
+ PCD_DATABASE_SKU_DELTA *SkuDelta;
+ PCD_DATA_DELTA *SkuDeltaData;
+
+ DEBUG ((DEBUG_INFO, "PcdPei - SkuId 0x%lx is to be set.\n", (SKU_ID) SkuId));
+
+ PeiPcdDb = GetPcdDatabase();
+
+ if (SkuId == PeiPcdDb->SystemSkuId) {
+ //
+ // The input SKU Id is equal to current SKU Id, return directly.
+ //
+ DEBUG ((DEBUG_INFO, "PcdPei - SkuId is same to current system Sku.\n"));
+ return;
+ }
+
+ if (PeiPcdDb->SystemSkuId != (SKU_ID) 0) {
+ DEBUG ((DEBUG_ERROR, "PcdPei - The SKU Id could be changed only once."));
+ DEBUG ((
+ DEBUG_ERROR,
+ "PcdPei - The SKU Id was set to 0x%lx already, it could not be set to 0x%lx any more.",
+ PeiPcdDb->SystemSkuId,
+ (SKU_ID) SkuId
+ ));
+ ASSERT (FALSE);
+ return;
+ }
+
+ SkuIdTable = (SKU_ID *) ((UINT8 *) PeiPcdDb + PeiPcdDb->SkuIdTableOffset);
+ for (Index = 0; Index < SkuIdTable[0]; Index++) {
+ if (SkuId == SkuIdTable[Index + 1]) {
+ DEBUG ((DEBUG_INFO, "PcdPei - SkuId is found in SkuId table.\n"));
+ break;
+ }
+ }
+
+ if (Index < SkuIdTable[0]) {
+ //
+ // Get full PCD database from PcdPeim FileHandle
+ //
+ Instance = 0;
+ FileHandle = NULL;
+ while (TRUE) {
+ //
+ // Traverse all firmware volume instances
+ //
+ Status = PeiServicesFfsFindNextVolume (Instance, &VolumeHandle);
+ //
+ // Error should not happen
+ //
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Find PcdDb file from the beginning in this firmware volume.
+ //
+ FileHandle = NULL;
+ Status = PeiServicesFfsFindFileByName (&gEfiCallerIdGuid, VolumeHandle, &FileHandle);
+ if (!EFI_ERROR (Status)) {
+ //
+ // Find PcdPeim FileHandle in this volume
+ //
+ break;
+ }
+ //
+ // We cannot find PcdPeim in this firmware volume, then search the next volume.
+ //
+ Instance++;
+ }
+
+ //
+ // Find the delta data between the different Skus
+ //
+ Status = PeiServicesFfsFindSectionData (EFI_SECTION_RAW, FileHandle, &PcdDb);
+ ASSERT_EFI_ERROR (Status);
+ Length = PeiPcdDb->LengthForAllSkus;
+ Index = (PeiPcdDb->Length + 7) & (~7);
+ SkuDelta = NULL;
+ while (Index < Length) {
+ SkuDelta = (PCD_DATABASE_SKU_DELTA *) ((UINT8 *) PcdDb + Index);
+ if (SkuDelta->SkuId == SkuId && SkuDelta->SkuIdCompared == 0) {
+ break;
+ }
+ Index = (Index + SkuDelta->Length + 7) & (~7);
+ }
+
+ //
+ // Patch the delta data into current PCD database
+ //
+ if (Index < Length && SkuDelta != NULL) {
+ SkuDeltaData = (PCD_DATA_DELTA *) (SkuDelta + 1);
+ while ((UINT8 *) SkuDeltaData < (UINT8 *) SkuDelta + SkuDelta->Length) {
+ *((UINT8 *) PeiPcdDb + SkuDeltaData->Offset) = (UINT8) SkuDeltaData->Value;
+ SkuDeltaData ++;
+ }
+ PeiPcdDb->SystemSkuId = (SKU_ID) SkuId;
+ DEBUG ((DEBUG_INFO, "PcdPei - Set current SKU Id to 0x%lx.\n", (SKU_ID) SkuId));
+ return;
+ }
+ }
+
+ //
+ // Invalid input SkuId, the default SKU Id will be still used for the system.
+ //
+ DEBUG ((DEBUG_ERROR, "PcdPei - Invalid input SkuId, the default SKU Id will be still used.\n"));
+
+ return;
+}
+
+/**
+ Retrieves an 8-bit value for a given PCD token.
+
+ Retrieves the current byte-sized value for a PCD token number.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The UINT8 value.
+
+**/
+UINT8
+EFIAPI
+PeiPcdGet8 (
+ IN UINTN TokenNumber
+ )
+{
+ return *((UINT8 *) GetWorker (TokenNumber, sizeof (UINT8)));
+}
+
+/**
+ Retrieves an 16-bit value for a given PCD token.
+
+ Retrieves the current 16-bits value for a PCD token number.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The UINT16 value.
+
+**/
+UINT16
+EFIAPI
+PeiPcdGet16 (
+ IN UINTN TokenNumber
+ )
+{
+ return ReadUnaligned16 (GetWorker (TokenNumber, sizeof (UINT16)));
+}
+
+/**
+ Retrieves an 32-bit value for a given PCD token.
+
+ Retrieves the current 32-bits value for a PCD token number.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The UINT32 value.
+
+**/
+UINT32
+EFIAPI
+PeiPcdGet32 (
+ IN UINTN TokenNumber
+ )
+{
+ return ReadUnaligned32 (GetWorker (TokenNumber, sizeof (UINT32)));
+}
+
+/**
+ Retrieves an 64-bit value for a given PCD token.
+
+ Retrieves the current 64-bits value for a PCD token number.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The UINT64 value.
+
+**/
+UINT64
+EFIAPI
+PeiPcdGet64 (
+ IN UINTN TokenNumber
+ )
+{
+ return ReadUnaligned64 (GetWorker (TokenNumber, sizeof (UINT64)));
+}
+
+/**
+ Retrieves a pointer to a value for a given PCD token.
+
+ Retrieves the current pointer to the buffer for a PCD token number.
+ Do not make any assumptions about the alignment of the pointer that
+ is returned by this function call. If the TokenNumber is invalid,
+ the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The pointer to the buffer to be retrieved.
+
+**/
+VOID *
+EFIAPI
+PeiPcdGetPtr (
+ IN UINTN TokenNumber
+ )
+{
+ return GetWorker (TokenNumber, 0);
+}
+
+/**
+ Retrieves a Boolean value for a given PCD token.
+
+ Retrieves the current boolean value for a PCD token number.
+ Do not make any assumptions about the alignment of the pointer that
+ is returned by this function call. If the TokenNumber is invalid,
+ the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The Boolean value.
+
+**/
+BOOLEAN
+EFIAPI
+PeiPcdGetBool (
+ IN UINTN TokenNumber
+ )
+{
+ return *((BOOLEAN *) GetWorker (TokenNumber, sizeof (BOOLEAN)));
+}
+
+/**
+ Retrieves the size of the value for a given PCD token.
+
+ Retrieves the current size of a particular PCD token.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] TokenNumber The PCD token number.
+
+ @return The size of the value for the PCD token.
+
+**/
+UINTN
+EFIAPI
+PeiPcdGetSize (
+ IN UINTN TokenNumber
+ )
+{
+ PEI_PCD_DATABASE *PeiPcdDb;
+ UINTN Size;
+ UINTN MaxSize;
+ UINT32 LocalTokenCount;
+
+ PeiPcdDb = GetPcdDatabase ();
+ LocalTokenCount = PeiPcdDb->LocalTokenCount;
+ //
+ // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
+ // We have to decrement TokenNumber by 1 to make it usable
+ // as the array index.
+ //
+ TokenNumber--;
+
+ // EBC compiler is very choosy. It may report warning about comparison
+ // between UINTN and 0 . So we add 1 in each size of the
+ // comparison.
+ ASSERT (TokenNumber + 1 < (LocalTokenCount + 1));
+
+ Size = (*((UINT32 *)((UINT8 *)PeiPcdDb + PeiPcdDb->LocalTokenNumberTableOffset) + TokenNumber) & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT;
+
+ if (Size == 0) {
+ //
+ // For pointer type, we need to scan the SIZE_TABLE to get the current size.
+ //
+ return GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);
+ } else {
+ return Size;
+ }
+
+}
+
+/**
+ Retrieves an 8-bit value for a given PCD token.
+
+ Retrieves the 8-bit value of a particular PCD token.
+ If the TokenNumber is invalid or the token space
+ specified by Guid does not exist, the results are
+ unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size 8-bit value for the PCD token.
+
+**/
+UINT8
+EFIAPI
+PeiPcdGet8Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return *((UINT8 *) ExGetWorker (Guid, ExTokenNumber, sizeof (UINT8)));
+}
+
+/**
+ Retrieves an 16-bit value for a given PCD token.
+
+ Retrieves the 16-bit value of a particular PCD token.
+ If the TokenNumber is invalid or the token space
+ specified by Guid does not exist, the results are
+ unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size 16-bit value for the PCD token.
+
+**/
+UINT16
+EFIAPI
+PeiPcdGet16Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return ReadUnaligned16 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT16)));
+}
+
+/**
+ Retrieves an 32-bit value for a given PCD token.
+
+ Retrieves the 32-bit value of a particular PCD token.
+ If the TokenNumber is invalid or the token space
+ specified by Guid does not exist, the results are
+ unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size 32-bit value for the PCD token.
+
+**/
+UINT32
+EFIAPI
+PeiPcdGet32Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return ReadUnaligned32 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT32)));
+}
+
+/**
+ Retrieves an 64-bit value for a given PCD token.
+
+ Retrieves the 64-bit value of a particular PCD token.
+ If the TokenNumber is invalid or the token space
+ specified by Guid does not exist, the results are
+ unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size 64-bit value for the PCD token.
+
+**/
+UINT64
+EFIAPI
+PeiPcdGet64Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return ReadUnaligned64 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT64)));
+}
+
+/**
+ Retrieves a pointer to a value for a given PCD token.
+
+ Retrieves the current pointer to the buffer for a PCD token number.
+ Do not make any assumptions about the alignment of the pointer that
+ is returned by this function call. If the TokenNumber is invalid,
+ the results are unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The pointer to the buffer to be retrieved.
+
+**/
+VOID *
+EFIAPI
+PeiPcdGetPtrEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return ExGetWorker (Guid, ExTokenNumber, 0);
+}
+
+/**
+ Retrieves an Boolean value for a given PCD token.
+
+ Retrieves the Boolean value of a particular PCD token.
+ If the TokenNumber is invalid or the token space
+ specified by Guid does not exist, the results are
+ unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size Boolean value for the PCD token.
+
+**/
+BOOLEAN
+EFIAPI
+PeiPcdGetBoolEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return *((BOOLEAN *) ExGetWorker (Guid, ExTokenNumber, sizeof (BOOLEAN)));
+}
+
+/**
+ Retrieves the size of the value for a given PCD token.
+
+ Retrieves the current size of a particular PCD token.
+ If the TokenNumber is invalid, the results are unpredictable.
+
+ @param[in] Guid The token space for the token number.
+ @param[in] ExTokenNumber The PCD token number.
+
+ @return The size of the value for the PCD token.
+
+**/
+UINTN
+EFIAPI
+PeiPcdGetSizeEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber
+ )
+{
+ return PeiPcdGetSize (GetExPcdTokenNumber (Guid, ExTokenNumber));
+}
+
+/**
+ Sets an 8-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet8 (
+ IN UINTN TokenNumber,
+ IN UINT8 Value
+ )
+{
+ return SetValueWorker (TokenNumber, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 16-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet16 (
+ IN UINTN TokenNumber,
+ IN UINT16 Value
+ )
+{
+ return SetValueWorker (TokenNumber, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 32-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet32 (
+ IN UINTN TokenNumber,
+ IN UINT32 Value
+ )
+{
+ return SetValueWorker (TokenNumber, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 64-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet64 (
+ IN UINTN TokenNumber,
+ IN UINT64 Value
+ )
+{
+ return SetValueWorker (TokenNumber, &Value, sizeof (Value));
+}
+
+/**
+ Sets a value of a specified size for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
+ On input, if the SizeOfValue is greater than the maximum size supported
+ for this TokenNumber then the output value of SizeOfValue will reflect
+ the maximum size supported for this TokenNumber.
+ @param[in] Buffer The buffer to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSetPtr (
+ IN UINTN TokenNumber,
+ IN OUT UINTN *SizeOfBuffer,
+ IN VOID *Buffer
+ )
+{
+ return SetWorker (TokenNumber, Buffer, SizeOfBuffer, TRUE);
+}
+
+/**
+ Sets an Boolean value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] TokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSetBool (
+ IN UINTN TokenNumber,
+ IN BOOLEAN Value
+ )
+{
+ return SetValueWorker (TokenNumber, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 8-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet8Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN UINT8 Value
+ )
+{
+ return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 16-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet16Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN UINT16 Value
+ )
+{
+ return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 32-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet32Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN UINT32 Value
+ )
+{
+ return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
+}
+
+/**
+ Sets an 64-bit value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSet64Ex (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN UINT64 Value
+ )
+{
+ return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
+}
+
+/**
+ Sets a value of a specified size for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
+ On input, if the SizeOfValue is greater than the maximum size supported
+ for this TokenNumber then the output value of SizeOfValue will reflect
+ the maximum size supported for this TokenNumber.
+ @param[in] Value The buffer to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSetPtrEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN OUT UINTN *SizeOfBuffer,
+ IN VOID *Value
+ )
+{
+ return ExSetWorker (ExTokenNumber, Guid, Value, SizeOfBuffer, TRUE);
+}
+
+/**
+ Sets an Boolean value for a given PCD token.
+
+ When the PCD service sets a value, it will check to ensure that the
+ size of the value being set is compatible with the Token's existing definition.
+ If it is not, an error will be returned.
+
+ @param [in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param [in] ExTokenNumber The PCD token number.
+ @param [in] Value The value to set for the PCD token.
+
+ @retval EFI_SUCCESS Procedure returned successfully.
+ @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
+ being set was incompatible with a call to this function.
+ Use GetSize() to retrieve the size of the target data.
+ @retval EFI_NOT_FOUND The PCD service could not find the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdSetBoolEx (
+ IN CONST EFI_GUID *Guid,
+ IN UINTN ExTokenNumber,
+ IN BOOLEAN Value
+ )
+{
+ return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
+}
+
+/**
+ Specifies a function to be called anytime the value of a designated token is changed.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
+
+ @retval EFI_SUCCESS The PCD service has successfully established a call event
+ for the CallBackToken requested.
+ @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiRegisterCallBackOnSet (
+ IN CONST EFI_GUID *Guid, OPTIONAL
+ IN UINTN ExTokenNumber,
+ IN PCD_PPI_CALLBACK CallBackFunction
+ )
+{
+ if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (CallBackFunction == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, TRUE);
+}
+
+/**
+ Cancels a previously set callback function for a particular PCD token number.
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ @param[in] ExTokenNumber The PCD token number.
+ @param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
+
+ @retval EFI_SUCCESS The PCD service has successfully established a call event
+ for the CallBackToken requested.
+ @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PcdUnRegisterCallBackOnSet (
+ IN CONST EFI_GUID *Guid, OPTIONAL
+ IN UINTN ExTokenNumber,
+ IN PCD_PPI_CALLBACK CallBackFunction
+ )
+{
+ if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (CallBackFunction == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, FALSE);
+}
+
+/**
+ Retrieves the next valid token number in a given namespace.
+
+ This is useful since the PCD infrastructure contains a sparse list of token numbers,
+ and one cannot a priori know what token numbers are valid in the database.
+
+ If TokenNumber is 0 and Guid is not NULL, then the first token from the token space specified by Guid is returned.
+ If TokenNumber is not 0 and Guid is not NULL, then the next token in the token space specified by Guid is returned.
+ If TokenNumber is 0 and Guid is NULL, then the first token in the default token space is returned.
+ If TokenNumber is not 0 and Guid is NULL, then the next token in the default token space is returned.
+ The token numbers in the default token space may not be related to token numbers in token spaces that are named by Guid.
+ If the next token number can be retrieved, then it is returned in TokenNumber, and EFI_SUCCESS is returned.
+ If TokenNumber represents the last token number in the token space specified by Guid, then EFI_NOT_FOUND is returned.
+ If TokenNumber is not present in the token space specified by Guid, then EFI_NOT_FOUND is returned.
+
+
+ @param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
+ This is an optional parameter that may be NULL. If this parameter is NULL, then a request
+ is being made to retrieve tokens from the default token space.
+ @param[in, out] TokenNumber A pointer to the PCD token number to use to find the subsequent token number.
+
+ @retval EFI_SUCCESS The PCD service has retrieved the next valid token number.
+ @retval EFI_NOT_FOUND The PCD service could not find data from the requested token number.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdGetNextToken (
+ IN CONST EFI_GUID *Guid, OPTIONAL
+ IN OUT UINTN *TokenNumber
+ )
+{
+ UINTN GuidTableIdx;
+ PEI_PCD_DATABASE *PeiPcdDb;
+ EFI_GUID *MatchGuid;
+ EFI_GUID *GuidTable;
+ DYNAMICEX_MAPPING *ExMapTable;
+ UINTN Index;
+ BOOLEAN Found;
+ BOOLEAN PeiExMapTableEmpty;
+ UINTN PeiNexTokenNumber;
+
+ if (!FeaturePcdGet (PcdPeiFullPcdDatabaseEnable)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ PeiPcdDb = GetPcdDatabase ();
+ PeiNexTokenNumber = PeiPcdDb->LocalTokenCount - PeiPcdDb->ExTokenCount;
+ GuidTable = (EFI_GUID *)((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset);
+
+ if (PeiPcdDb->ExTokenCount == 0) {
+ PeiExMapTableEmpty = TRUE;
+ } else {
+ PeiExMapTableEmpty = FALSE;
+ }
+ if (Guid == NULL) {
+ if (*TokenNumber > PeiNexTokenNumber) {
+ return EFI_NOT_FOUND;
+ }
+ (*TokenNumber)++;
+ if (*TokenNumber > PeiNexTokenNumber) {
+ *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
+ return EFI_NOT_FOUND;
+ }
+ return EFI_SUCCESS;
+ } else {
+ if (PeiExMapTableEmpty) {
+ return EFI_NOT_FOUND;
+ }
+
+ MatchGuid = ScanGuid (GuidTable, PeiPcdDb->GuidTableCount * sizeof(EFI_GUID), Guid);
+
+ if (MatchGuid == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ GuidTableIdx = MatchGuid - GuidTable;
+
+ ExMapTable = (DYNAMICEX_MAPPING *)((UINT8 *)PeiPcdDb + PeiPcdDb->ExMapTableOffset);
+
+ Found = FALSE;
+ //
+ // Locate the GUID in ExMapTable first.
+ //
+ for (Index = 0; Index < PeiPcdDb->ExTokenCount; Index++) {
+ if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
+ Found = TRUE;
+ break;
+ }
+ }
+
+ if (Found) {
+ //
+ // If given token number is PCD_INVALID_TOKEN_NUMBER, then return the first
+ // token number in found token space.
+ //
+ if (*TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
+ *TokenNumber = ExMapTable[Index].ExTokenNumber;
+ return EFI_SUCCESS;
+ }
+
+ for ( ; Index < PeiPcdDb->ExTokenCount; Index++) {
+ if ((ExMapTable[Index].ExTokenNumber == *TokenNumber) && (ExMapTable[Index].ExGuidIndex == GuidTableIdx)) {
+ break;
+ }
+ }
+
+ while (Index < PeiPcdDb->ExTokenCount) {
+ Index++;
+ if (Index == PeiPcdDb->ExTokenCount) {
+ //
+ // Exceed the length of ExMap Table
+ //
+ *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
+ return EFI_NOT_FOUND;
+ } else if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
+ //
+ // Found the next match
+ //
+ *TokenNumber = ExMapTable[Index].ExTokenNumber;
+ return EFI_SUCCESS;
+ }
+ }
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}
+
+/**
+ Retrieves the next valid PCD token namespace for a given namespace.
+
+ Gets the next valid token namespace for a given namespace. This is useful to traverse the valid
+ token namespaces on a platform.
+
+ @param[in, out] Guid An indirect pointer to EFI_GUID. On input it designates a known token
+ namespace from which the search will start. On output, it designates the next valid
+ token namespace on the platform. If *Guid is NULL, then the GUID of the first token
+ space of the current platform is returned. If the search cannot locate the next valid
+ token namespace, an error is returned and the value of *Guid is undefined.
+
+ @retval EFI_SUCCESS The PCD service retrieved the value requested.
+ @retval EFI_NOT_FOUND The PCD service could not find the next valid token namespace.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiPcdGetNextTokenSpace (
+ IN OUT CONST EFI_GUID **Guid
+ )
+{
+ UINTN GuidTableIdx;
+ EFI_GUID *MatchGuid;
+ PEI_PCD_DATABASE *PeiPcdDb;
+ DYNAMICEX_MAPPING *ExMapTable;
+ UINTN Index;
+ UINTN Index2;
+ BOOLEAN Found;
+ BOOLEAN PeiExMapTableEmpty;
+ EFI_GUID *GuidTable;
+
+ if (!FeaturePcdGet (PcdPeiFullPcdDatabaseEnable)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ ASSERT (Guid != NULL);
+
+ PeiPcdDb = GetPcdDatabase ();
+
+ if (PeiPcdDb->ExTokenCount == 0) {
+ PeiExMapTableEmpty = TRUE;
+ } else {
+ PeiExMapTableEmpty = FALSE;
+ }
+
+ if (PeiExMapTableEmpty) {
+ return EFI_NOT_FOUND;
+ }
+
+ ExMapTable = (DYNAMICEX_MAPPING *)((UINT8 *)PeiPcdDb + PeiPcdDb->ExMapTableOffset);
+ GuidTable = (EFI_GUID *)((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset);
+
+ if (*Guid == NULL) {
+ //
+ // return the first Token Space Guid.
+ //
+ *Guid = GuidTable + ExMapTable[0].ExGuidIndex;
+ return EFI_SUCCESS;
+ }
+
+ MatchGuid = ScanGuid (GuidTable, PeiPcdDb->GuidTableCount * sizeof(GuidTable[0]), *Guid);
+
+ if (MatchGuid == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ GuidTableIdx = MatchGuid - GuidTable;
+
+ Found = FALSE;
+ for (Index = 0; Index < PeiPcdDb->ExTokenCount; Index++) {
+ if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
+ Found = TRUE;
+ break;
+ }
+ }
+
+ if (Found) {
+ Index++;
+ for ( ; Index < PeiPcdDb->ExTokenCount; Index++ ) {
+ if (ExMapTable[Index].ExGuidIndex != GuidTableIdx) {
+ Found = FALSE;
+ for (Index2 = 0 ; Index2 < Index; Index2++) {
+ if (ExMapTable[Index2].ExGuidIndex == ExMapTable[Index].ExGuidIndex) {
+ //
+ // This token namespace should have been found and output at preceding getting.
+ //
+ Found = TRUE;
+ break;
+ }
+ }
+ if (!Found) {
+ *Guid = (EFI_GUID *)((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset) + ExMapTable[Index].ExGuidIndex;
+ return EFI_SUCCESS;
+ }
+ }
+ }
+ *Guid = NULL;
+ }
+
+ return EFI_NOT_FOUND;
+
+}
+
+/**
+ Get PCD value's size for POINTER type PCD.
+
+ The POINTER type PCD's value will be stored into a buffer in specified size.
+ The max size of this PCD's value is described in PCD's definition in DEC file.
+
+ @param LocalTokenNumberTableIdx Index of PCD token number in PCD token table
+ @param MaxSize Maximum size of PCD's value
+ @param Database Pcd database in PEI phase.
+
+ @return PCD value's size for POINTER type PCD.
+
+**/
+UINTN
+GetPtrTypeSize (
+ IN UINTN LocalTokenNumberTableIdx,
+ OUT UINTN *MaxSize,
+ IN PEI_PCD_DATABASE *Database
+ )
+{
+ INTN SizeTableIdx;
+ UINTN LocalTokenNumber;
+ SIZE_INFO *SizeTable;
+
+ SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);
+
+ LocalTokenNumber = *((UINT32 *)((UINT8 *)Database + Database->LocalTokenNumberTableOffset) + LocalTokenNumberTableIdx);
+
+ ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
+
+ SizeTable = (SIZE_INFO *)((UINT8 *)Database + Database->SizeTableOffset);
+
+ *MaxSize = SizeTable[SizeTableIdx];
+ //
+ // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type
+ // PCD entry.
+ //
+ if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) {
+ //
+ // We have only two entry for VPD enabled PCD entry:
+ // 1) MAX Size.
+ // 2) Current Size
+ // We consider current size is equal to MAX size.
+ //
+ return *MaxSize;
+ } else {
+ //
+ // We have only two entry for Non-Sku enabled PCD entry:
+ // 1) MAX SIZE
+ // 2) Current Size
+ //
+ return SizeTable[SizeTableIdx + 1];
+ }
+}
+
+/**
+ Set PCD value's size for POINTER type PCD.
+
+ The POINTER type PCD's value will be stored into a buffer in specified size.
+ The max size of this PCD's value is described in PCD's definition in DEC file.
+
+ @param LocalTokenNumberTableIdx Index of PCD token number in PCD token table
+ @param CurrentSize Maximum size of PCD's value
+ @param Database Pcd database in PEI phase.
+
+ @retval TRUE Success to set PCD's value size, which is not exceed maximum size
+ @retval FALSE Fail to set PCD's value size, which maybe exceed maximum size
+
+**/
+BOOLEAN
+SetPtrTypeSize (
+ IN UINTN LocalTokenNumberTableIdx,
+ IN OUT UINTN *CurrentSize,
+ IN PEI_PCD_DATABASE *Database
+ )
+{
+ INTN SizeTableIdx;
+ UINTN LocalTokenNumber;
+ SIZE_INFO *SizeTable;
+ UINTN MaxSize;
+
+ SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);
+
+ LocalTokenNumber = *((UINT32 *)((UINT8 *)Database + Database->LocalTokenNumberTableOffset) + LocalTokenNumberTableIdx);
+
+ ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
+
+ SizeTable = (SIZE_INFO *)((UINT8 *)Database + Database->SizeTableOffset);
+
+ MaxSize = SizeTable[SizeTableIdx];
+ //
+ // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type
+ // PCD entry.
+ //
+ if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) {
+ //
+ // We shouldn't come here as we don't support SET for VPD
+ //
+ ASSERT (FALSE);
+ return FALSE;
+ } else {
+ if ((*CurrentSize > MaxSize) ||
+ (*CurrentSize == MAX_ADDRESS)) {
+ *CurrentSize = MaxSize;
+ return FALSE;
+ }
+
+ //
+ // We have only two entry for Non-Sku enabled PCD entry:
+ // 1) MAX SIZE
+ // 2) Current Size
+ //
+ SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize;
+ return TRUE;
+ }
+
+}
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