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audk/MdeModulePkg/Universal/PCD/Dxe/Service.c

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/** @file
Help functions used by PCD DXE driver.
Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016-2021 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Service.h"
#include <Library/DxeServicesLib.h>
PCD_DATABASE mPcdDatabase;
UINT32 mPcdTotalTokenCount;
UINT32 mPeiLocalTokenCount;
UINT32 mDxeLocalTokenCount;
UINT32 mPeiNexTokenCount;
UINT32 mDxeNexTokenCount;
UINT32 mPeiExMapppingTableSize;
UINT32 mDxeExMapppingTableSize;
UINT32 mPeiGuidTableSize;
UINT32 mDxeGuidTableSize;
BOOLEAN mPeiExMapTableEmpty;
BOOLEAN mDxeExMapTableEmpty;
BOOLEAN mPeiDatabaseEmpty;
LIST_ENTRY *mCallbackFnTable;
EFI_GUID **TmpTokenSpaceBuffer;
UINTN TmpTokenSpaceBufferCount;
UINTN mPeiPcdDbSize = 0;
PEI_PCD_DATABASE *mPeiPcdDbBinary = NULL;
UINTN mDxePcdDbSize = 0;
DXE_PCD_DATABASE *mDxePcdDbBinary = NULL;
/**
Get Local Token Number by Token Number.
@param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,
If FALSE, the pcd entry is initialized in DXE phase.
@param[in] TokenNumber The PCD token number.
@return Local Token Number.
**/
UINT32
GetLocalTokenNumber (
IN BOOLEAN IsPeiDb,
IN UINTN TokenNumber
)
{
UINT32 *LocalTokenNumberTable;
//
// 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--;
LocalTokenNumberTable = IsPeiDb ? (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset) :
(UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset);
TokenNumber = IsPeiDb ? TokenNumber : TokenNumber - mPeiLocalTokenCount;
return LocalTokenNumberTable[TokenNumber];
}
/**
Get PCD type by Local Token Number.
@param[in] LocalTokenNumber The PCD local token number.
@return PCD type.
**/
EFI_PCD_TYPE
GetPcdType (
IN UINT32 LocalTokenNumber
)
{
switch (LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) {
case PCD_DATUM_TYPE_POINTER:
return EFI_PCD_TYPE_PTR;
case PCD_DATUM_TYPE_UINT8:
if ((LocalTokenNumber & PCD_DATUM_TYPE_UINT8_BOOLEAN) == PCD_DATUM_TYPE_UINT8_BOOLEAN) {
return EFI_PCD_TYPE_BOOL;
} else {
return EFI_PCD_TYPE_8;
}
case PCD_DATUM_TYPE_UINT16:
return EFI_PCD_TYPE_16;
case PCD_DATUM_TYPE_UINT32:
return EFI_PCD_TYPE_32;
case PCD_DATUM_TYPE_UINT64:
return EFI_PCD_TYPE_64;
default:
ASSERT (FALSE);
return EFI_PCD_TYPE_8;
}
}
/**
Get PCD name.
@param[in] OnlyTokenSpaceName If TRUE, only need to get the TokenSpaceCName.
If FALSE, need to get the full PCD name.
@param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,
If FALSE, the pcd entry is initialized in DXE phase.
@param[in] TokenNumber The PCD token number.
@return The TokenSpaceCName or full PCD name.
**/
CHAR8 *
GetPcdName (
IN BOOLEAN OnlyTokenSpaceName,
IN BOOLEAN IsPeiDb,
IN UINTN TokenNumber
)
{
PCD_DATABASE_INIT *Database;
UINT8 *StringTable;
UINTN NameSize;
PCD_NAME_INDEX *PcdNameIndex;
CHAR8 *TokenSpaceName;
CHAR8 *PcdName;
CHAR8 *Name;
//
// Return NULL when PCD name table is absent.
//
if (IsPeiDb) {
if (mPcdDatabase.PeiDb->PcdNameTableOffset == 0) {
return NULL;
}
} else {
if (mPcdDatabase.DxeDb->PcdNameTableOffset == 0) {
return NULL;
}
}
//
// 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--;
Database = IsPeiDb ? mPcdDatabase.PeiDb : mPcdDatabase.DxeDb;
TokenNumber = IsPeiDb ? TokenNumber : TokenNumber - mPeiLocalTokenCount;
StringTable = (UINT8 *)Database + Database->StringTableOffset;
//
// Get the PCD name index.
//
PcdNameIndex = (PCD_NAME_INDEX *)((UINT8 *)Database + Database->PcdNameTableOffset) + TokenNumber;
TokenSpaceName = (CHAR8 *)&StringTable[PcdNameIndex->TokenSpaceCNameIndex];
PcdName = (CHAR8 *)&StringTable[PcdNameIndex->PcdCNameIndex];
if (OnlyTokenSpaceName) {
//
// Only need to get the TokenSpaceCName.
//
Name = AllocateCopyPool (AsciiStrSize (TokenSpaceName), TokenSpaceName);
} else {
//
// Need to get the full PCD name.
//
NameSize = AsciiStrSize (TokenSpaceName) + AsciiStrSize (PcdName);
Name = AllocateZeroPool (NameSize);
ASSERT (Name != NULL);
//
// Catenate TokenSpaceCName and PcdCName with a '.' to form the full PCD name.
//
AsciiStrCatS (Name, NameSize, TokenSpaceName);
Name[AsciiStrSize (TokenSpaceName) - sizeof (CHAR8)] = '.';
AsciiStrCatS (Name, NameSize, PcdName);
}
return Name;
}
/**
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] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,
If FALSE, the pcd entry is initialized in DXE phase.
@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
ExGetPcdInfo (
IN BOOLEAN IsPeiDb,
IN CONST EFI_GUID *Guid,
IN UINTN TokenNumber,
OUT EFI_PCD_INFO *PcdInfo
)
{
PCD_DATABASE_INIT *Database;
UINTN GuidTableIdx;
EFI_GUID *MatchGuid;
EFI_GUID *GuidTable;
DYNAMICEX_MAPPING *ExMapTable;
UINTN Index;
UINT32 LocalTokenNumber;
Database = IsPeiDb ? mPcdDatabase.PeiDb : mPcdDatabase.DxeDb;
GuidTable = (EFI_GUID *)((UINT8 *)Database + Database->GuidTableOffset);
MatchGuid = ScanGuid (GuidTable, Database->GuidTableCount * sizeof (EFI_GUID), Guid);
if (MatchGuid == NULL) {
return EFI_NOT_FOUND;
}
GuidTableIdx = MatchGuid - GuidTable;
ExMapTable = (DYNAMICEX_MAPPING *)((UINT8 *)Database + Database->ExMapTableOffset);
//
// Find the PCD by GuidTableIdx and ExTokenNumber in ExMapTable.
//
for (Index = 0; Index < Database->ExTokenCount; Index++) {
if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
//
// TokenNumber is 0, follow spec to set PcdType to EFI_PCD_TYPE_8,
// PcdSize to 0 and PcdName to the null-terminated ASCII string
// associated with the token's namespace Guid.
//
PcdInfo->PcdType = EFI_PCD_TYPE_8;
PcdInfo->PcdSize = 0;
//
// Here use one representative in the token space to get the TokenSpaceCName.
//
PcdInfo->PcdName = GetPcdName (TRUE, IsPeiDb, ExMapTable[Index].TokenNumber);
return EFI_SUCCESS;
} else if (ExMapTable[Index].ExTokenNumber == TokenNumber) {
PcdInfo->PcdSize = DxePcdGetSize (ExMapTable[Index].TokenNumber);
LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, ExMapTable[Index].TokenNumber);
PcdInfo->PcdType = GetPcdType (LocalTokenNumber);
PcdInfo->PcdName = GetPcdName (FALSE, IsPeiDb, ExMapTable[Index].TokenNumber);
return EFI_SUCCESS;
}
}
}
return EFI_NOT_FOUND;
}
/**
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
DxeGetPcdInfo (
IN CONST EFI_GUID *Guid,
IN UINTN TokenNumber,
OUT EFI_PCD_INFO *PcdInfo
)
{
EFI_STATUS Status;
BOOLEAN PeiExMapTableEmpty;
BOOLEAN DxeExMapTableEmpty;
UINT32 LocalTokenNumber;
BOOLEAN IsPeiDb;
ASSERT (PcdInfo != NULL);
Status = EFI_NOT_FOUND;
PeiExMapTableEmpty = mPeiExMapTableEmpty;
DxeExMapTableEmpty = mDxeExMapTableEmpty;
if (Guid == NULL) {
if (((TokenNumber + 1 > mPeiNexTokenCount + 1) && (TokenNumber + 1 <= mPeiLocalTokenCount + 1)) ||
((TokenNumber + 1 > (mPeiLocalTokenCount + mDxeNexTokenCount + 1))))
{
return EFI_NOT_FOUND;
} else if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
//
// TokenNumber is 0, follow spec to set PcdType to EFI_PCD_TYPE_8,
// PcdSize to 0 and PcdName to NULL for default Token Space.
//
PcdInfo->PcdType = EFI_PCD_TYPE_8;
PcdInfo->PcdSize = 0;
PcdInfo->PcdName = NULL;
} else {
PcdInfo->PcdSize = DxePcdGetSize (TokenNumber);
IsPeiDb = FALSE;
if ((TokenNumber + 1 <= mPeiNexTokenCount + 1)) {
IsPeiDb = TRUE;
}
LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber);
PcdInfo->PcdType = GetPcdType (LocalTokenNumber);
PcdInfo->PcdName = GetPcdName (FALSE, IsPeiDb, TokenNumber);
}
return EFI_SUCCESS;
}
if (PeiExMapTableEmpty && DxeExMapTableEmpty) {
return EFI_NOT_FOUND;
}
if (!PeiExMapTableEmpty) {
Status = ExGetPcdInfo (
TRUE,
Guid,
TokenNumber,
PcdInfo
);
}
if (Status == EFI_SUCCESS) {
return Status;
}
if (!DxeExMapTableEmpty) {
Status = ExGetPcdInfo (
FALSE,
Guid,
TokenNumber,
PcdInfo
);
}
return Status;
}
/**
Get the PCD entry pointer in PCD database.
This routine will visit PCD database to find the PCD entry according to given
token number. The given token number is autogened by build tools and it will be
translated to local token number. Local token number contains PCD's type and
offset of PCD entry in PCD database.
@param TokenNumber Token's number, it is autogened by build tools
@param GetSize The size of token's value
@return PCD entry pointer in PCD database
**/
VOID *
GetWorker (
IN UINTN TokenNumber,
IN UINTN GetSize
)
{
EFI_GUID *GuidTable;
UINT8 *StringTable;
EFI_GUID *Guid;
UINT16 *Name;
VARIABLE_HEAD *VariableHead;
UINT8 *VaraiableDefaultBuffer;
UINT8 *Data;
VPD_HEAD *VpdHead;
UINT8 *PcdDb;
VOID *RetPtr;
UINTN TmpTokenNumber;
UINTN DataSize;
EFI_STATUS Status;
UINT32 LocalTokenNumber;
UINT32 Offset;
STRING_HEAD StringTableIdx;
BOOLEAN IsPeiDb;
//
// Aquire lock to prevent reentrance from TPL_CALLBACK level
//
EfiAcquireLock (&mPcdDatabaseLock);
RetPtr = NULL;
ASSERT (TokenNumber > 0);
//
// 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--;
TmpTokenNumber = 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 < mPcdTotalTokenCount + 1);
ASSERT ((GetSize == DxePcdGetSize (TokenNumber + 1)) || (GetSize == 0));
// 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.
IsPeiDb = (BOOLEAN)((TokenNumber + 1 < mPeiLocalTokenCount + 1) ? TRUE : FALSE);
LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber + 1);
PcdDb = IsPeiDb ? ((UINT8 *)mPcdDatabase.PeiDb) : ((UINT8 *)mPcdDatabase.DxeDb);
if (IsPeiDb) {
StringTable = (UINT8 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->StringTableOffset);
} else {
StringTable = (UINT8 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->StringTableOffset);
}
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
switch (LocalTokenNumber & PCD_TYPE_ALL_SET) {
case PCD_TYPE_VPD:
VpdHead = (VPD_HEAD *)((UINT8 *)PcdDb + Offset);
ASSERT (mVpdBaseAddress != 0);
RetPtr = (VOID *)(mVpdBaseAddress + VpdHead->Offset);
break;
case PCD_TYPE_HII|PCD_TYPE_STRING:
case PCD_TYPE_HII:
if (IsPeiDb) {
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset);
} else {
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset);
}
VariableHead = (VARIABLE_HEAD *)(PcdDb + Offset);
Guid = GuidTable + VariableHead->GuidTableIndex;
Name = (UINT16 *)(StringTable + VariableHead->StringIndex);
if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {
//
// If a HII type PCD's datum type is VOID*, the DefaultValueOffset is the index of
// string array in string table.
//
StringTableIdx = *(STRING_HEAD *)((UINT8 *)PcdDb + VariableHead->DefaultValueOffset);
VaraiableDefaultBuffer = (UINT8 *)(StringTable + StringTableIdx);
} else {
VaraiableDefaultBuffer = (UINT8 *)PcdDb + VariableHead->DefaultValueOffset;
}
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if (Status == EFI_SUCCESS) {
if (DataSize >= (VariableHead->Offset + GetSize)) {
if (GetSize == 0) {
//
// It is a pointer type. So get the MaxSize reserved for
// this PCD entry.
//
GetPtrTypeSize (TmpTokenNumber, &GetSize);
if (GetSize > (DataSize - VariableHead->Offset)) {
//
// Use actual valid size.
//
GetSize = DataSize - VariableHead->Offset;
}
}
//
// If the operation is successful, we copy the data
// to the default value buffer in the PCD Database.
// So that we can free the Data allocated in GetHiiVariable.
//
CopyMem (VaraiableDefaultBuffer, Data + VariableHead->Offset, GetSize);
}
FreePool (Data);
}
RetPtr = (VOID *)VaraiableDefaultBuffer;
break;
case PCD_TYPE_STRING:
StringTableIdx = *(STRING_HEAD *)((UINT8 *)PcdDb + Offset);
RetPtr = (VOID *)(StringTable + StringTableIdx);
break;
case PCD_TYPE_DATA:
RetPtr = (VOID *)((UINT8 *)PcdDb + Offset);
break;
default:
ASSERT (FALSE);
break;
}
EfiReleaseLock (&mPcdDatabaseLock);
return RetPtr;
}
/**
Register the callback function for a PCD entry.
This routine will register a callback function to a PCD entry by given token number
and token space guid.
@param TokenNumber PCD token's number, it is autogened by build tools.
@param Guid PCD token space's guid,
if not NULL, this PCD is dynamicEx type PCD.
@param CallBackFunction Callback function pointer
@return EFI_SUCCESS Always success for registering callback function.
**/
EFI_STATUS
DxeRegisterCallBackWorker (
IN UINTN TokenNumber,
IN CONST EFI_GUID *Guid OPTIONAL,
IN PCD_PROTOCOL_CALLBACK CallBackFunction
)
{
CALLBACK_FN_ENTRY *FnTableEntry;
LIST_ENTRY *ListHead;
LIST_ENTRY *ListNode;
if (Guid != NULL) {
TokenNumber = GetExPcdTokenNumber (Guid, (UINT32)TokenNumber);
}
//
// TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
// We have to decrement TokenNumber by 1 to make it usable
// as the array index of mCallbackFnTable[].
//
ListHead = &mCallbackFnTable[TokenNumber - 1];
ListNode = GetFirstNode (ListHead);
while (ListNode != ListHead) {
FnTableEntry = CR_FNENTRY_FROM_LISTNODE (ListNode, CALLBACK_FN_ENTRY, Node);
if (FnTableEntry->CallbackFn == CallBackFunction) {
//
// We only allow a Callback function to be register once
// for a TokenNumber. So just return EFI_SUCCESS
//
return EFI_SUCCESS;
}
ListNode = GetNextNode (ListHead, ListNode);
}
FnTableEntry = AllocatePool (sizeof (CALLBACK_FN_ENTRY));
ASSERT (FnTableEntry != NULL);
FnTableEntry->CallbackFn = CallBackFunction;
InsertTailList (ListHead, &FnTableEntry->Node);
return EFI_SUCCESS;
}
/**
UnRegister the callback function for a PCD entry.
This routine will unregister a callback function to a PCD entry by given token number
and token space guid.
@param TokenNumber PCD token's number, it is autogened by build tools.
@param Guid PCD token space's guid.
if not NULL, this PCD is dynamicEx type PCD.
@param CallBackFunction Callback function pointer
@retval EFI_SUCCESS Callback function is success to be unregister.
@retval EFI_INVALID_PARAMETER Can not find the PCD entry by given token number.
**/
EFI_STATUS
DxeUnRegisterCallBackWorker (
IN UINTN TokenNumber,
IN CONST EFI_GUID *Guid OPTIONAL,
IN PCD_PROTOCOL_CALLBACK CallBackFunction
)
{
CALLBACK_FN_ENTRY *FnTableEntry;
LIST_ENTRY *ListHead;
LIST_ENTRY *ListNode;
if (Guid != NULL) {
TokenNumber = GetExPcdTokenNumber (Guid, (UINT32)TokenNumber);
}
//
// TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
// We have to decrement TokenNumber by 1 to make it usable
// as the array index of mCallbackFnTable[].
//
ListHead = &mCallbackFnTable[TokenNumber - 1];
ListNode = GetFirstNode (ListHead);
while (ListNode != ListHead) {
FnTableEntry = CR_FNENTRY_FROM_LISTNODE (ListNode, CALLBACK_FN_ENTRY, Node);
if (FnTableEntry->CallbackFn == CallBackFunction) {
//
// We only allow a Callback function to be register once
// for a TokenNumber. So we can safely remove the Node from
// the Link List and return EFI_SUCCESS.
//
RemoveEntryList (ListNode);
FreePool (FnTableEntry);
return EFI_SUCCESS;
}
ListNode = GetNextNode (ListHead, ListNode);
}
return EFI_INVALID_PARAMETER;
}
/**
Get next token number in given token space.
This routine is used for dynamicEx type PCD. It will firstly scan token space
table to get token space according to given token space guid. Then scan given
token number in found token space, if found, then return next token number in
this token space.
@param Guid Token space guid. Next token number will be scaned in
this token space.
@param TokenNumber Token number.
If PCD_INVALID_TOKEN_NUMBER, return first token number in
token space table.
If not PCD_INVALID_TOKEN_NUMBER, return next token number
in token space table.
@param GuidTable Token space guid table. It will be used for scan token space
by given token space guid.
@param SizeOfGuidTable The size of guid table.
@param ExMapTable DynamicEx token number mapping table.
@param SizeOfExMapTable The size of dynamicEx token number mapping table.
@retval EFI_NOT_FOUND Can not given token space or token number.
@retval EFI_SUCCESS Success to get next token number.
**/
EFI_STATUS
ExGetNextTokeNumber (
IN CONST EFI_GUID *Guid,
IN OUT UINTN *TokenNumber,
IN EFI_GUID *GuidTable,
IN UINTN SizeOfGuidTable,
IN DYNAMICEX_MAPPING *ExMapTable,
IN UINTN SizeOfExMapTable
)
{
EFI_GUID *MatchGuid;
UINTN Index;
UINTN GuidTableIdx;
BOOLEAN Found;
UINTN ExMapTableCount;
//
// Scan token space guid
//
MatchGuid = ScanGuid (GuidTable, SizeOfGuidTable, Guid);
if (MatchGuid == NULL) {
return EFI_NOT_FOUND;
}
//
// Find the token space table in dynamicEx mapping table.
//
Found = FALSE;
GuidTableIdx = MatchGuid - GuidTable;
ExMapTableCount = SizeOfExMapTable / sizeof (ExMapTable[0]);
for (Index = 0; Index < ExMapTableCount; 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 < ExMapTableCount; Index++) {
if ((ExMapTable[Index].ExTokenNumber == *TokenNumber) && (ExMapTable[Index].ExGuidIndex == GuidTableIdx)) {
break;
}
}
while (Index < ExMapTableCount) {
Index++;
if (Index == ExMapTableCount) {
//
// 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;
}
/**
Find the PCD database.
@retval The base address of external PCD database binary.
@retval NULL Return NULL if not find.
**/
DXE_PCD_DATABASE *
LocateExPcdBinary (
VOID
)
{
EFI_STATUS Status;
//
// Search the External Pcd database from one section of current FFS,
// and read it to memory
//
Status = GetSectionFromFfs (
EFI_SECTION_RAW,
0,
(VOID **)&mDxePcdDbBinary,
&mDxePcdDbSize
);
ASSERT_EFI_ERROR (Status);
//
// Check the first bytes (Header Signature Guid) and build version.
//
if (!CompareGuid ((VOID *)mDxePcdDbBinary, &gPcdDataBaseSignatureGuid) ||
(mDxePcdDbBinary->BuildVersion != PCD_SERVICE_DXE_VERSION))
{
ASSERT (FALSE);
}
return mDxePcdDbBinary;
}
/**
Update PCD database base on current SkuId
@param SkuId Current SkuId
@param IsPeiDb Whether to update PEI PCD database.
@retval EFI_SUCCESS Update PCD database successfully.
@retval EFI_NOT_FOUND Not found PCD database for current SkuId.
**/
EFI_STATUS
UpdatePcdDatabase (
IN SKU_ID SkuId,
IN BOOLEAN IsPeiDb
)
{
UINTN Index;
PCD_DATABASE_SKU_DELTA *SkuDelta;
PCD_DATA_DELTA *SkuDeltaData;
if (IsPeiDb && (mPeiPcdDbBinary != NULL)) {
//
// Find the delta data for PEI DB
//
Index = (mPcdDatabase.PeiDb->Length + 7) & (~7);
SkuDelta = NULL;
while (Index < mPeiPcdDbSize) {
SkuDelta = (PCD_DATABASE_SKU_DELTA *)((UINT8 *)mPeiPcdDbBinary + 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 < mPeiPcdDbSize) && (SkuDelta != NULL)) {
SkuDeltaData = (PCD_DATA_DELTA *)(SkuDelta + 1);
while ((UINT8 *)SkuDeltaData < (UINT8 *)SkuDelta + SkuDelta->Length) {
*((UINT8 *)mPcdDatabase.PeiDb + SkuDeltaData->Offset) = (UINT8)SkuDeltaData->Value;
SkuDeltaData++;
}
} else {
return EFI_NOT_FOUND;
}
}
//
// Find the delta data for DXE DB
//
Index = (mPcdDatabase.DxeDb->Length + 7) & (~7);
SkuDelta = NULL;
if (Index == mDxePcdDbSize) {
return EFI_SUCCESS;
}
while (Index < mDxePcdDbSize) {
SkuDelta = (PCD_DATABASE_SKU_DELTA *)((UINT8 *)mDxePcdDbBinary + 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 < mDxePcdDbSize) && (SkuDelta != NULL)) {
SkuDeltaData = (PCD_DATA_DELTA *)(SkuDelta + 1);
while ((UINT8 *)SkuDeltaData < (UINT8 *)SkuDelta + SkuDelta->Length) {
*((UINT8 *)mPcdDatabase.DxeDb + SkuDeltaData->Offset) = (UINT8)SkuDeltaData->Value;
SkuDeltaData++;
}
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
/**
Initialize the PCD database in DXE phase.
PCD database in DXE phase also contains PCD database in PEI phase which is copied
from GUID Hob.
**/
VOID
BuildPcdDxeDataBase (
VOID
)
{
PEI_PCD_DATABASE *PeiDatabase;
EFI_HOB_GUID_TYPE *GuidHob;
UINTN Index;
UINT32 PcdDxeDbLen;
VOID *PcdDxeDb;
EFI_STATUS Status;
//
// Assign PCD Entries with default value to PCD DATABASE
//
mPcdDatabase.DxeDb = LocateExPcdBinary ();
ASSERT (mPcdDatabase.DxeDb != NULL);
PcdDxeDbLen = mPcdDatabase.DxeDb->Length + mPcdDatabase.DxeDb->UninitDataBaseSize;
PcdDxeDb = AllocateZeroPool (PcdDxeDbLen);
ASSERT (PcdDxeDb != NULL);
CopyMem (PcdDxeDb, mPcdDatabase.DxeDb, mPcdDatabase.DxeDb->Length);
mPcdDatabase.DxeDb = PcdDxeDb;
GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
if (GuidHob != NULL) {
//
// If no PEIMs use dynamic Pcd Entry, the Pcd Service PEIM
// should not be included at all. So the GuidHob could
// be NULL. If it is NULL, we just copy over the DXE Default
// Value to PCD Database.
//
PeiDatabase = (PEI_PCD_DATABASE *)GET_GUID_HOB_DATA (GuidHob);
//
// Get next one that stores full PEI data
//
GuidHob = GetNextGuidHob (&gPcdDataBaseHobGuid, GET_NEXT_HOB (GuidHob));
if (GuidHob != NULL) {
mPeiPcdDbBinary = (PEI_PCD_DATABASE *)GET_GUID_HOB_DATA (GuidHob);
mPeiPcdDbSize = (UINTN)GET_GUID_HOB_DATA_SIZE (GuidHob);
}
//
// Assign PCD Entries refereneced in PEI phase to PCD DATABASE
//
mPcdDatabase.PeiDb = PeiDatabase;
//
// Inherit the SystemSkuId from PEI phase.
//
if (mPcdDatabase.PeiDb->SystemSkuId != 0) {
Status = UpdatePcdDatabase (mPcdDatabase.PeiDb->SystemSkuId, FALSE);
ASSERT_EFI_ERROR (Status);
}
mPcdDatabase.DxeDb->SystemSkuId = mPcdDatabase.PeiDb->SystemSkuId;
} else {
mPcdDatabase.PeiDb = AllocateZeroPool (sizeof (PEI_PCD_DATABASE));
ASSERT (mPcdDatabase.PeiDb != NULL);
}
//
// Initialized the external PCD database local variables
//
mPeiLocalTokenCount = mPcdDatabase.PeiDb->LocalTokenCount;
mDxeLocalTokenCount = mPcdDatabase.DxeDb->LocalTokenCount;
mPeiExMapppingTableSize = mPcdDatabase.PeiDb->ExTokenCount * sizeof (DYNAMICEX_MAPPING);
mDxeExMapppingTableSize = mPcdDatabase.DxeDb->ExTokenCount * sizeof (DYNAMICEX_MAPPING);
mPeiGuidTableSize = mPcdDatabase.PeiDb->GuidTableCount * sizeof (GUID);
mDxeGuidTableSize = mPcdDatabase.DxeDb->GuidTableCount * sizeof (GUID);
mPcdTotalTokenCount = mPeiLocalTokenCount + mDxeLocalTokenCount;
mPeiNexTokenCount = mPeiLocalTokenCount - mPcdDatabase.PeiDb->ExTokenCount;
mDxeNexTokenCount = mDxeLocalTokenCount - mPcdDatabase.DxeDb->ExTokenCount;
mPeiExMapTableEmpty = (mPcdDatabase.PeiDb->ExTokenCount == 0) ? TRUE : FALSE;
mDxeExMapTableEmpty = (mPcdDatabase.DxeDb->ExTokenCount == 0) ? TRUE : FALSE;
mPeiDatabaseEmpty = (mPeiLocalTokenCount == 0) ? TRUE : FALSE;
TmpTokenSpaceBufferCount = mPcdDatabase.PeiDb->ExTokenCount + mPcdDatabase.DxeDb->ExTokenCount;
TmpTokenSpaceBuffer = (EFI_GUID **)AllocateZeroPool (TmpTokenSpaceBufferCount * sizeof (EFI_GUID *));
//
// Initialized the Callback Function Table
//
mCallbackFnTable = AllocateZeroPool (mPcdTotalTokenCount * sizeof (LIST_ENTRY));
ASSERT (mCallbackFnTable != NULL);
//
// 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.
//
for (Index = 0; Index + 1 < mPcdTotalTokenCount + 1; Index++) {
InitializeListHead (&mCallbackFnTable[Index]);
}
}
/**
Get Variable which contains HII type PCD entry.
@param VariableGuid Variable's guid
@param VariableName Variable's unicode name string
@param VariableData Variable's data pointer,
@param VariableSize Variable's size.
@return the status of gRT->GetVariable
**/
EFI_STATUS
GetHiiVariable (
IN EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
OUT UINT8 **VariableData,
OUT UINTN *VariableSize
)
{
UINTN Size;
EFI_STATUS Status;
UINT8 *Buffer;
Size = 0;
Buffer = NULL;
//
// Firstly get the real size of HII variable
//
Status = gRT->GetVariable (
(UINT16 *)VariableName,
VariableGuid,
NULL,
&Size,
Buffer
);
//
// Allocate buffer to hold whole variable data according to variable size.
//
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = (UINT8 *)AllocatePool (Size);
ASSERT (Buffer != NULL);
Status = gRT->GetVariable (
VariableName,
VariableGuid,
NULL,
&Size,
Buffer
);
ASSERT (Status == EFI_SUCCESS);
*VariableData = Buffer;
*VariableSize = Size;
} else {
//
// Use Default Data only when variable is not found.
// For other error status, correct data can't be got, and trig ASSERT().
//
ASSERT (Status == EFI_NOT_FOUND);
}
return Status;
}
/**
Invoke the callback function when dynamic PCD entry was set, if this PCD entry
has registered callback function.
@param ExTokenNumber DynamicEx PCD's token number, if this PCD entry is dyanmicEx
type PCD.
@param Guid DynamicEx PCD's guid, if this PCD entry is dynamicEx type
PCD.
@param TokenNumber PCD token number generated by build tools.
@param Data Value want to be set for this PCD entry
@param Size The size of value
**/
VOID
InvokeCallbackOnSet (
UINT32 ExTokenNumber,
CONST EFI_GUID *Guid OPTIONAL,
UINTN TokenNumber,
VOID *Data,
UINTN Size
)
{
CALLBACK_FN_ENTRY *FnTableEntry;
LIST_ENTRY *ListHead;
LIST_ENTRY *ListNode;
//
// TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
// We have to decrement TokenNumber by 1 to make it usable
// as the array index of mCallbackFnTable[].
//
ListHead = &mCallbackFnTable[TokenNumber - 1];
ListNode = GetFirstNode (ListHead);
while (ListNode != ListHead) {
FnTableEntry = CR_FNENTRY_FROM_LISTNODE (ListNode, CALLBACK_FN_ENTRY, Node);
FnTableEntry->CallbackFn (
Guid,
(Guid == NULL) ? TokenNumber : ExTokenNumber,
Data,
Size
);
ListNode = GetNextNode (ListHead, ListNode);
}
return;
}
/**
Wrapper function for setting non-pointer type value for a PCD entry.
@param TokenNumber Pcd token number autogenerated by build tools.
@param Data Value want to be set for PCD entry
@param Size Size of value.
@return status of SetWorker.
**/
EFI_STATUS
SetValueWorker (
IN UINTN TokenNumber,
IN VOID *Data,
IN UINTN Size
)
{
return SetWorker (TokenNumber, Data, &Size, FALSE);
}
/**
Set value for an PCD entry
@param TokenNumber Pcd token number autogenerated by build tools.
@param Data Value want to be set for PCD entry
@param Size Size of value.
@param PtrType If TRUE, the type of PCD entry's value is Pointer.
If False, the type of PCD entry's value is not Pointer.
@retval EFI_INVALID_PARAMETER If this PCD type is VPD, VPD PCD can not be set.
@retval EFI_INVALID_PARAMETER If Size can not be set to size table.
@retval EFI_INVALID_PARAMETER If Size of non-Ptr type PCD does not match the size information in PCD database.
@retval EFI_NOT_FOUND If value type of PCD entry is intergrate, but not in
range of UINT8, UINT16, UINT32, UINT64
@retval EFI_NOT_FOUND Can not find the PCD type according to token number.
**/
EFI_STATUS
SetWorker (
IN UINTN TokenNumber,
IN VOID *Data,
IN OUT UINTN *Size,
IN BOOLEAN PtrType
)
{
BOOLEAN IsPeiDb;
UINT32 LocalTokenNumber;
EFI_GUID *GuidTable;
UINT8 *StringTable;
EFI_GUID *Guid;
UINT16 *Name;
UINTN VariableOffset;
UINT32 Attributes;
VOID *InternalData;
VARIABLE_HEAD *VariableHead;
UINTN Offset;
UINT8 *PcdDb;
EFI_STATUS Status;
UINTN MaxSize;
UINTN TmpTokenNumber;
//
// 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--;
TmpTokenNumber = 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 < mPcdTotalTokenCount + 1);
if (PtrType) {
//
// Get MaxSize first, then check new size with max buffer size.
//
GetPtrTypeSize (TokenNumber, &MaxSize);
if (*Size > MaxSize) {
*Size = MaxSize;
return EFI_INVALID_PARAMETER;
}
} else {
if (*Size != DxePcdGetSize (TokenNumber + 1)) {
return EFI_INVALID_PARAMETER;
}
}
//
// 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.
//
if ((TokenNumber + 1 < mPeiNexTokenCount + 1) ||
((TokenNumber + 1 >= mPeiLocalTokenCount + 1) && (TokenNumber + 1 < (mPeiLocalTokenCount + mDxeNexTokenCount + 1))))
{
InvokeCallbackOnSet (0, NULL, TokenNumber + 1, Data, *Size);
}
//
// Aquire lock to prevent reentrance from TPL_CALLBACK level
//
EfiAcquireLock (&mPcdDatabaseLock);
//
// 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.
//
IsPeiDb = (BOOLEAN)((TokenNumber + 1 < mPeiLocalTokenCount + 1) ? TRUE : FALSE);
LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber + 1);
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
PcdDb = IsPeiDb ? ((UINT8 *)mPcdDatabase.PeiDb) : ((UINT8 *)mPcdDatabase.DxeDb);
if (IsPeiDb) {
StringTable = (UINT8 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->StringTableOffset);
} else {
StringTable = (UINT8 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->StringTableOffset);
}
InternalData = PcdDb + Offset;
switch (LocalTokenNumber & PCD_TYPE_ALL_SET) {
case PCD_TYPE_VPD:
ASSERT (FALSE);
Status = EFI_INVALID_PARAMETER;
break;
case PCD_TYPE_STRING:
if (SetPtrTypeSize (TmpTokenNumber, Size)) {
CopyMem (StringTable + *((STRING_HEAD *)InternalData), Data, *Size);
Status = EFI_SUCCESS;
} else {
Status = EFI_INVALID_PARAMETER;
}
break;
case PCD_TYPE_HII|PCD_TYPE_STRING:
case PCD_TYPE_HII:
if (PtrType) {
if (!SetPtrTypeSize (TmpTokenNumber, Size)) {
Status = EFI_INVALID_PARAMETER;
break;
}
}
if (IsPeiDb) {
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset);
} else {
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset);
}
VariableHead = (VARIABLE_HEAD *)(PcdDb + Offset);
Guid = GuidTable + VariableHead->GuidTableIndex;
Name = (UINT16 *)(StringTable + VariableHead->StringIndex);
VariableOffset = VariableHead->Offset;
Attributes = VariableHead->Attributes;
Status = SetHiiVariable (Guid, Name, Attributes, Data, *Size, VariableOffset);
break;
case PCD_TYPE_DATA:
if (PtrType) {
if (SetPtrTypeSize (TmpTokenNumber, Size)) {
CopyMem (InternalData, Data, *Size);
Status = EFI_SUCCESS;
} else {
Status = EFI_INVALID_PARAMETER;
}
break;
}
Status = EFI_SUCCESS;
switch (*Size) {
case sizeof (UINT8):
*((UINT8 *)InternalData) = *((UINT8 *)Data);
break;
case sizeof (UINT16):
*((UINT16 *)InternalData) = *((UINT16 *)Data);
break;
case sizeof (UINT32):
*((UINT32 *)InternalData) = *((UINT32 *)Data);
break;
case sizeof (UINT64):
*((UINT64 *)InternalData) = *((UINT64 *)Data);
break;
default:
ASSERT (FALSE);
Status = EFI_NOT_FOUND;
break;
}
break;
default:
ASSERT (FALSE);
Status = EFI_NOT_FOUND;
break;
}
EfiReleaseLock (&mPcdDatabaseLock);
return Status;
}
/**
Wrapper function for get PCD value for dynamic-ex PCD.
@param Guid Token space guid for dynamic-ex PCD.
@param ExTokenNumber Token number for dynamic-ex PCD.
@param GetSize The size of dynamic-ex PCD value.
@return PCD entry in PCD database.
**/
VOID *
ExGetWorker (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINTN GetSize
)
{
return GetWorker (GetExPcdTokenNumber (Guid, (UINT32)ExTokenNumber), GetSize);
}
/**
Wrapper function for set PCD value for non-Pointer type dynamic-ex PCD.
@param ExTokenNumber Token number for dynamic-ex PCD.
@param Guid Token space guid for dynamic-ex PCD.
@param Data Value want to be set.
@param SetSize The size of value.
@return status of ExSetWorker().
**/
EFI_STATUS
ExSetValueWorker (
IN UINTN ExTokenNumber,
IN CONST EFI_GUID *Guid,
IN VOID *Data,
IN UINTN SetSize
)
{
return ExSetWorker (ExTokenNumber, Guid, Data, &SetSize, FALSE);
}
/**
Set value for a dynamic-ex PCD entry.
This routine find the local token number according to dynamic-ex PCD's token
space guid and token number firstly, and invoke callback function if this PCD
entry registered callback function. Finally, invoken general SetWorker to set
PCD value.
@param ExTokenNumber Dynamic-ex PCD token number.
@param Guid Token space guid for dynamic-ex PCD.
@param Data PCD value want to be set
@param SetSize Size of value.
@param PtrType If TRUE, this PCD entry is pointer type.
If FALSE, this PCD entry is not pointer type.
@return status of SetWorker().
**/
EFI_STATUS
ExSetWorker (
IN UINTN ExTokenNumber,
IN CONST EFI_GUID *Guid,
IN VOID *Data,
IN OUT UINTN *SetSize,
IN BOOLEAN PtrType
)
{
UINTN TokenNumber;
TokenNumber = GetExPcdTokenNumber (Guid, (UINT32)ExTokenNumber);
InvokeCallbackOnSet ((UINT32)ExTokenNumber, Guid, TokenNumber, Data, *SetSize);
return SetWorker (TokenNumber, Data, SetSize, PtrType);
}
/**
Get variable size and data from HII-type PCDs.
@param[in] VariableGuid Guid of variable which stored value of a HII-type PCD.
@param[in] VariableName Unicode name of variable which stored value of a HII-type PCD.
@param[out] VariableSize Pointer to variable size got from HII-type PCDs.
@param[out] VariableData Pointer to variable data got from HII-type PCDs.
**/
VOID
GetVariableSizeAndDataFromHiiPcd (
IN EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
OUT UINTN *VariableSize,
OUT VOID *VariableData OPTIONAL
)
{
BOOLEAN IsPeiDb;
PCD_DATABASE_INIT *Database;
UINTN TokenNumber;
UINT32 LocalTokenNumber;
UINTN Offset;
EFI_GUID *GuidTable;
UINT8 *StringTable;
VARIABLE_HEAD *VariableHead;
EFI_GUID *Guid;
UINT16 *Name;
UINTN PcdDataSize;
UINTN Size;
UINT8 *VaraiableDefaultBuffer;
STRING_HEAD StringTableIdx;
*VariableSize = 0;
//
// Go through PCD database to find out DynamicHii PCDs.
//
for (TokenNumber = 1; TokenNumber <= mPcdTotalTokenCount; TokenNumber++) {
IsPeiDb = (BOOLEAN)((TokenNumber + 1 < mPeiLocalTokenCount + 1) ? TRUE : FALSE);
Database = IsPeiDb ? mPcdDatabase.PeiDb : mPcdDatabase.DxeDb;
LocalTokenNumber = GetLocalTokenNumber (IsPeiDb, TokenNumber);
if ((LocalTokenNumber & PCD_TYPE_HII) != 0) {
//
// Get the Variable Guid and Name pointer.
//
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
VariableHead = (VARIABLE_HEAD *)((UINT8 *)Database + Offset);
StringTable = (UINT8 *)((UINT8 *)Database + Database->StringTableOffset);
GuidTable = (EFI_GUID *)((UINT8 *)Database + Database->GuidTableOffset);
Guid = GuidTable + VariableHead->GuidTableIndex;
Name = (UINT16 *)(StringTable + VariableHead->StringIndex);
if (CompareGuid (VariableGuid, Guid) && (StrCmp (VariableName, Name) == 0)) {
//
// It is the matched DynamicHii PCD.
//
PcdDataSize = DxePcdGetSize (TokenNumber);
Size = VariableHead->Offset + PcdDataSize;
if (Size > *VariableSize) {
*VariableSize = Size;
}
if (VariableData != NULL) {
if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {
//
// If a HII type PCD's datum type is VOID*, the DefaultValueOffset is the index of
// string array in string table.
//
StringTableIdx = *(STRING_HEAD *)((UINT8 *)Database + VariableHead->DefaultValueOffset);
VaraiableDefaultBuffer = (UINT8 *)(StringTable + StringTableIdx);
} else {
VaraiableDefaultBuffer = (UINT8 *)Database + VariableHead->DefaultValueOffset;
}
CopyMem ((UINT8 *)VariableData + VariableHead->Offset, VaraiableDefaultBuffer, PcdDataSize);
}
}
}
}
}
/**
Set value for HII-type PCD.
A HII-type PCD's value is stored in a variable. Setting/Getting the value of
HII-type PCD is to visit this variable.
@param VariableGuid Guid of variable which stored value of a HII-type PCD.
@param VariableName Unicode name of variable which stored value of a HII-type PCD.
@param SetAttributes Attributes bitmask to set for the variable.
@param Data Value want to be set.
@param DataSize Size of value
@param Offset Value offset of HII-type PCD in variable.
@return status of GetVariable()/SetVariable().
**/
EFI_STATUS
SetHiiVariable (
IN EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
IN UINT32 SetAttributes,
IN CONST VOID *Data,
IN UINTN DataSize,
IN UINTN Offset
)
{
UINTN Size;
VOID *Buffer;
EFI_STATUS Status;
UINT32 Attribute;
UINTN SetSize;
Size = 0;
SetSize = 0;
//
// Try to get original variable size information.
//
Status = gRT->GetVariable (
(UINT16 *)VariableName,
VariableGuid,
NULL,
&Size,
NULL
);
if (Status == EFI_BUFFER_TOO_SMALL) {
//
// Patch new PCD's value to offset in given HII variable.
//
if (Size >= (DataSize + Offset)) {
SetSize = Size;
} else {
SetSize = DataSize + Offset;
}
Buffer = AllocatePool (SetSize);
ASSERT (Buffer != NULL);
Status = gRT->GetVariable (
VariableName,
VariableGuid,
&Attribute,
&Size,
Buffer
);
ASSERT_EFI_ERROR (Status);
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);
if (SetAttributes == 0) {
SetAttributes = Attribute;
}
Status = gRT->SetVariable (
VariableName,
VariableGuid,
SetAttributes,
SetSize,
Buffer
);
FreePool (Buffer);
return Status;
} else if (Status == EFI_NOT_FOUND) {
//
// If variable does not exist, a new variable need to be created.
//
//
// Get size, allocate buffer and get data.
//
GetVariableSizeAndDataFromHiiPcd (VariableGuid, VariableName, &Size, NULL);
Buffer = AllocateZeroPool (Size);
ASSERT (Buffer != NULL);
GetVariableSizeAndDataFromHiiPcd (VariableGuid, VariableName, &Size, Buffer);
//
// Update buffer.
//
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);
if (SetAttributes == 0) {
SetAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE;
}
Status = gRT->SetVariable (
VariableName,
VariableGuid,
SetAttributes,
Size,
Buffer
);
FreePool (Buffer);
return Status;
}
//
// If we drop to here, the value is failed to be written in to variable area.
//
return Status;
}
/**
Get Token Number according to dynamic-ex PCD's {token space guid:token number}
A dynamic-ex type PCD, developer must provide pair of token space guid: token number
in DEC file. PCD database maintain a mapping table that translate pair of {token
space guid: token number} to Token Number.
@param Guid Token space guid for dynamic-ex PCD entry.
@param ExTokenNumber Dynamic-ex PCD token number.
@return Token Number for dynamic-ex PCD.
**/
UINTN
GetExPcdTokenNumber (
IN CONST EFI_GUID *Guid,
IN UINT32 ExTokenNumber
)
{
UINT32 Index;
DYNAMICEX_MAPPING *ExMap;
EFI_GUID *GuidTable;
EFI_GUID *MatchGuid;
UINTN MatchGuidIdx;
if (!mPeiDatabaseEmpty) {
ExMap = (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->ExMapTableOffset);
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->GuidTableOffset);
MatchGuid = ScanGuid (GuidTable, mPeiGuidTableSize, Guid);
if (MatchGuid != NULL) {
MatchGuidIdx = MatchGuid - GuidTable;
for (Index = 0; Index < mPcdDatabase.PeiDb->ExTokenCount; Index++) {
if ((ExTokenNumber == ExMap[Index].ExTokenNumber) &&
(MatchGuidIdx == ExMap[Index].ExGuidIndex))
{
return ExMap[Index].TokenNumber;
}
}
}
}
ExMap = (DYNAMICEX_MAPPING *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->ExMapTableOffset);
GuidTable = (EFI_GUID *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->GuidTableOffset);
MatchGuid = ScanGuid (GuidTable, mDxeGuidTableSize, Guid);
//
// We need to ASSERT here. If GUID can't be found in GuidTable, this is a
// error in the BUILD system.
//
ASSERT (MatchGuid != NULL);
MatchGuidIdx = MatchGuid - GuidTable;
for (Index = 0; Index < mPcdDatabase.DxeDb->ExTokenCount; Index++) {
if ((ExTokenNumber == ExMap[Index].ExTokenNumber) &&
(MatchGuidIdx == ExMap[Index].ExGuidIndex))
{
return ExMap[Index].TokenNumber;
}
}
DEBUG ((DEBUG_ERROR, "%a: Failed to find PCD with GUID: %g and token number: %d\n", __FUNCTION__, Guid, ExTokenNumber));
ASSERT (FALSE);
return 0;
}
/**
Wrapper function of getting index of PCD entry in size table.
@param LocalTokenNumberTableIdx Index of this PCD in local token number table.
@param IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,
If FALSE, the pcd entry is initialized in DXE phase.
@return index of PCD entry in size table.
**/
UINTN
GetSizeTableIndex (
IN UINTN LocalTokenNumberTableIdx,
IN BOOLEAN IsPeiDb
)
{
UINT32 *LocalTokenNumberTable;
UINTN LocalTokenNumber;
UINTN Index;
UINTN SizeTableIdx;
if (IsPeiDb) {
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset);
} else {
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset);
}
SizeTableIdx = 0;
for (Index = 0; Index < LocalTokenNumberTableIdx; Index++) {
LocalTokenNumber = LocalTokenNumberTable[Index];
if ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER) {
//
// 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
// Current size is equal to MAX size.
//
SizeTableIdx += 2;
} else {
//
// We have only two entry for Non-Sku enabled PCD entry:
// 1) MAX SIZE
// 2) Current Size
//
SizeTableIdx += 2;
}
}
}
return SizeTableIdx;
}
/**
Get size of POINTER type PCD value.
@param LocalTokenNumberTableIdx Index of local token number in local token number table.
@param MaxSize Maxmium size of POINTER type PCD value.
@return size of POINTER type PCD value.
**/
UINTN
GetPtrTypeSize (
IN UINTN LocalTokenNumberTableIdx,
OUT UINTN *MaxSize
)
{
INTN SizeTableIdx;
UINTN LocalTokenNumber;
SIZE_INFO *SizeTable;
BOOLEAN IsPeiDb;
UINT32 *LocalTokenNumberTable;
// 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.
IsPeiDb = (BOOLEAN)(LocalTokenNumberTableIdx + 1 < mPeiLocalTokenCount + 1);
if (IsPeiDb) {
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset);
SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->SizeTableOffset);
} else {
LocalTokenNumberTableIdx -= mPeiLocalTokenCount;
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset);
SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->SizeTableOffset);
}
LocalTokenNumber = LocalTokenNumberTable[LocalTokenNumberTableIdx];
ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, IsPeiDb);
*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 size of POINTER type PCD value. The size should not exceed the maximum size
of this PCD value.
@param LocalTokenNumberTableIdx Index of local token number in local token number table.
@param CurrentSize Size of POINTER type PCD value.
@retval TRUE Success to set size of PCD value.
@retval FALSE Fail to set size of PCD value.
**/
BOOLEAN
SetPtrTypeSize (
IN UINTN LocalTokenNumberTableIdx,
IN OUT UINTN *CurrentSize
)
{
INTN SizeTableIdx;
UINTN LocalTokenNumber;
SIZE_INFO *SizeTable;
UINTN MaxSize;
BOOLEAN IsPeiDb;
UINT32 *LocalTokenNumberTable;
//
// 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.
//
IsPeiDb = (BOOLEAN)(LocalTokenNumberTableIdx + 1 < mPeiLocalTokenCount + 1);
if (IsPeiDb) {
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->LocalTokenNumberTableOffset);
SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.PeiDb + mPcdDatabase.PeiDb->SizeTableOffset);
} else {
LocalTokenNumberTableIdx -= mPeiLocalTokenCount;
LocalTokenNumberTable = (UINT32 *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->LocalTokenNumberTableOffset);
SizeTable = (SIZE_INFO *)((UINT8 *)mPcdDatabase.DxeDb + mPcdDatabase.DxeDb->SizeTableOffset);
}
LocalTokenNumber = LocalTokenNumberTable[LocalTokenNumberTableIdx];
ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, IsPeiDb);
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;
}
}
/**
VariableLock DynamicHiiPcd.
@param[in] IsPeiDb If TRUE, the pcd entry is initialized in PEI phase,
If FALSE, the pcd entry is initialized in DXE phase.
@param[in] VariableLock Pointer to VariableLockProtocol.
**/
VOID
VariableLockDynamicHiiPcd (
IN BOOLEAN IsPeiDb,
IN EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock
)
{
EFI_STATUS Status;
PCD_DATABASE_INIT *Database;
UINT32 LocalTokenCount;
UINTN TokenNumber;
UINT32 LocalTokenNumber;
UINTN Offset;
EFI_GUID *GuidTable;
UINT8 *StringTable;
VARIABLE_HEAD *VariableHead;
EFI_GUID *Guid;
UINT16 *Name;
Database = IsPeiDb ? mPcdDatabase.PeiDb : mPcdDatabase.DxeDb;
LocalTokenCount = IsPeiDb ? mPeiLocalTokenCount : mDxeLocalTokenCount;
//
// Go through PCD database to find out DynamicHii PCDs.
//
for (TokenNumber = 1; TokenNumber <= LocalTokenCount; TokenNumber++) {
if (IsPeiDb) {
LocalTokenNumber = GetLocalTokenNumber (TRUE, TokenNumber);
} else {
LocalTokenNumber = GetLocalTokenNumber (FALSE, TokenNumber + mPeiLocalTokenCount);
}
if ((LocalTokenNumber & PCD_TYPE_HII) != 0) {
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
VariableHead = (VARIABLE_HEAD *)((UINT8 *)Database + Offset);
//
// Why not to set property by VarCheckProtocol with Attributes and Property directly here?
// It is because that set property by VarCheckProtocol will indicate the variable to
// be a system variable, but the unknown max size of the variable is dangerous to
// the system variable region.
//
if ((VariableHead->Property & VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY) != 0) {
//
// DynamicHii PCD with RO property set in *.dsc.
//
StringTable = (UINT8 *)((UINT8 *)Database + Database->StringTableOffset);
GuidTable = (EFI_GUID *)((UINT8 *)Database + Database->GuidTableOffset);
Guid = GuidTable + VariableHead->GuidTableIndex;
Name = (UINT16 *)(StringTable + VariableHead->StringIndex);
Status = VariableLock->RequestToLock (VariableLock, Name, Guid);
ASSERT_EFI_ERROR (Status);
}
}
}
}
/**
VariableLockProtocol callback
to lock the variables referenced by DynamicHii PCDs with RO property set in *.dsc.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context Pointer to the notification function's context.
**/
VOID
EFIAPI
VariableLockCallBack (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock;
Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLock);
if (!EFI_ERROR (Status)) {
VariableLockDynamicHiiPcd (TRUE, VariableLock);
VariableLockDynamicHiiPcd (FALSE, VariableLock);
}
}
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