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system76-edk2/MdeModulePkg/Universal/PCD/Pei/Service.c
Liming Gao 7c73626513 MdeModulePkg: Update PCD driver to support the optimized PcdDataBase 
https://bugzilla.tianocore.org/show_bug.cgi?id=546
BaseTools will generate the optimized PCD database to save the image size
at build time for multiple SKUs. The optimized PCD database layout will be like
below, the PCD database will be composed of the full default SKU data
(PCD_DATABASE_INIT) and the non-default SKU delta data(PCD_DATABASE_SKU_DELTA).
PCD driver will build HOB to store the full default SKU data, and patch HOB
data based on non-default SKU delta data for the SKU set by SetSku(),
it can save memory resource at boot time.

//
// PCD database layout:
// +---------------------------------+
// | PCD_DATABASE_INIT (DEFAULT SKU) |
// +---------------------------------+
// | PCD_DATABASE_SKU_DELTA (SKU A)  |
// +---------------------------------+
// | PCD_DATABASE_SKU_DELTA (SKU B)  |
// +---------------------------------+
// | ......                          |
// +---------------------------------+
//

BaseTools, PCD database and driver updates are needed for this proposal.
For single SKU (default) case, this proposal is expected to have no impact.
For multi-SKU case, PCD database format will be changed.
So, PcdDataBase Version is also updated from 6 to 7.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
2017-12-25 11:05:57 +08:00

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/** @file
The driver internal functions are implmented here.
They build Pei PCD database, and provide access service to PCD database.
Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "Service.h"
/**
Get Local Token Number by Token Number.
@param[in] Database PCD database.
@param[in] TokenNumber The PCD token number.
@return Local Token Number.
**/
UINT32
GetLocalTokenNumber (
IN PEI_PCD_DATABASE *Database,
IN UINTN TokenNumber
)
{
UINT32 LocalTokenNumber;
//
// 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--;
LocalTokenNumber = *((UINT32 *)((UINT8 *)Database + Database->LocalTokenNumberTableOffset) + TokenNumber);
return LocalTokenNumber;
}
/**
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] Database PCD database.
@param[in] TokenNumber The PCD token number.
@return The TokenSpaceCName or full PCD name.
**/
CHAR8 *
GetPcdName (
IN BOOLEAN OnlyTokenSpaceName,
IN PEI_PCD_DATABASE *Database,
IN UINTN TokenNumber
)
{
UINT8 *StringTable;
UINTN NameSize;
PCD_NAME_INDEX *PcdNameIndex;
CHAR8 *TokenSpaceName;
CHAR8 *PcdName;
CHAR8 *Name;
//
// Return NULL when PCD name table is absent.
//
if (Database->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--;
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] Database PCD database.
@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 PEI_PCD_DATABASE *Database,
IN CONST EFI_GUID *Guid,
IN UINTN TokenNumber,
OUT EFI_PCD_INFO *PcdInfo
)
{
UINTN GuidTableIdx;
EFI_GUID *MatchGuid;
EFI_GUID *GuidTable;
DYNAMICEX_MAPPING *ExMapTable;
UINTN Index;
UINT32 LocalTokenNumber;
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, Database, ExMapTable[Index].TokenNumber);
return EFI_SUCCESS;
} else if (ExMapTable[Index].ExTokenNumber == TokenNumber) {
PcdInfo->PcdSize = PeiPcdGetSize (ExMapTable[Index].TokenNumber);
LocalTokenNumber = GetLocalTokenNumber (Database, ExMapTable[Index].TokenNumber);
PcdInfo->PcdType = GetPcdType (LocalTokenNumber);
PcdInfo->PcdName = GetPcdName (FALSE, Database, 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
PeiGetPcdInfo (
IN CONST EFI_GUID *Guid,
IN UINTN TokenNumber,
OUT EFI_PCD_INFO *PcdInfo
)
{
PEI_PCD_DATABASE *PeiPcdDb;
BOOLEAN PeiExMapTableEmpty;
UINTN PeiNexTokenNumber;
UINT32 LocalTokenNumber;
ASSERT (PcdInfo != NULL);
PeiPcdDb = GetPcdDatabase ();
PeiNexTokenNumber = PeiPcdDb->LocalTokenCount - PeiPcdDb->ExTokenCount;
if (PeiPcdDb->ExTokenCount == 0) {
PeiExMapTableEmpty = TRUE;
} else {
PeiExMapTableEmpty = FALSE;
}
if (Guid == NULL) {
if (TokenNumber > PeiNexTokenNumber) {
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 = PeiPcdGetSize (TokenNumber);
LocalTokenNumber = GetLocalTokenNumber (PeiPcdDb, TokenNumber);
PcdInfo->PcdType = GetPcdType (LocalTokenNumber);
PcdInfo->PcdName = GetPcdName (FALSE, PeiPcdDb, TokenNumber);
}
return EFI_SUCCESS;
} else {
if (PeiExMapTableEmpty) {
return EFI_NOT_FOUND;
}
return ExGetPcdInfo (
PeiPcdDb,
Guid,
TokenNumber,
PcdInfo
);
}
}
/**
The function registers the CallBackOnSet fucntion
according to TokenNumber and EFI_GUID space.
@param ExTokenNumber The token number.
@param Guid The GUID space.
@param CallBackFunction The Callback function to be registered.
@param Register To register or unregister the callback function.
@retval EFI_SUCCESS If the Callback function is registered.
@retval EFI_NOT_FOUND If the PCD Entry is not found according to Token Number and GUID space.
@retval EFI_OUT_OF_RESOURCES If the callback function can't be registered because there is not free
slot left in the CallbackFnTable.
@retval EFI_INVALID_PARAMETER If the callback function want to be de-registered can not be found.
**/
EFI_STATUS
PeiRegisterCallBackWorker (
IN UINTN ExTokenNumber,
IN CONST EFI_GUID *Guid, OPTIONAL
IN PCD_PPI_CALLBACK CallBackFunction,
IN BOOLEAN Register
)
{
EFI_HOB_GUID_TYPE *GuidHob;
PCD_PPI_CALLBACK *CallbackTable;
PCD_PPI_CALLBACK Compare;
PCD_PPI_CALLBACK Assign;
UINT32 LocalTokenNumber;
UINT32 LocalTokenCount;
UINTN PeiNexTokenNumber;
UINTN TokenNumber;
UINTN Idx;
PEI_PCD_DATABASE *PeiPcdDb;
PeiPcdDb = GetPcdDatabase();
LocalTokenCount = PeiPcdDb->LocalTokenCount;
PeiNexTokenNumber = PeiPcdDb->LocalTokenCount - PeiPcdDb->ExTokenCount;
if (Guid == NULL) {
TokenNumber = ExTokenNumber;
//
// 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--;
ASSERT (TokenNumber + 1 < (PeiNexTokenNumber + 1));
} else {
TokenNumber = GetExPcdTokenNumber (Guid, ExTokenNumber);
if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
return EFI_NOT_FOUND;
}
//
// 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));
}
LocalTokenNumber = *((UINT32 *)((UINT8 *)PeiPcdDb + PeiPcdDb->LocalTokenNumberTableOffset) + TokenNumber);
//
// We don't support SET for HII and VPD type PCD entry in PEI phase.
// So we will assert if any register callback for such PCD entry.
//
ASSERT ((LocalTokenNumber & PCD_TYPE_HII) == 0);
ASSERT ((LocalTokenNumber & PCD_TYPE_VPD) == 0);
GuidHob = GetFirstGuidHob (&gEfiCallerIdGuid);
ASSERT (GuidHob != NULL);
CallbackTable = GET_GUID_HOB_DATA (GuidHob);
CallbackTable = CallbackTable + (TokenNumber * PcdGet32 (PcdMaxPeiPcdCallBackNumberPerPcdEntry));
Compare = Register? NULL: CallBackFunction;
Assign = Register? CallBackFunction: NULL;
for (Idx = 0; Idx < PcdGet32 (PcdMaxPeiPcdCallBackNumberPerPcdEntry); Idx++) {
if (CallbackTable[Idx] == Compare) {
CallbackTable[Idx] = Assign;
return EFI_SUCCESS;
}
}
return Register? EFI_OUT_OF_RESOURCES : EFI_INVALID_PARAMETER;
}
/**
Find the Pcd database.
@param FileHandle Handle of the file the external PCD database binary located.
@retval The base address of external PCD database binary.
@retval NULL Return NULL if not find.
**/
VOID *
LocateExPcdBinary (
IN EFI_PEI_FILE_HANDLE FileHandle
)
{
EFI_STATUS Status;
VOID *PcdDb;
PcdDb = NULL;
ASSERT (FileHandle != NULL);
Status = PeiServicesFfsFindSectionData (EFI_SECTION_RAW, FileHandle, &PcdDb);
ASSERT_EFI_ERROR (Status);
//
// Check the first bytes (Header Signature Guid) and build version.
//
if (!CompareGuid (PcdDb, &gPcdDataBaseSignatureGuid) ||
(((PEI_PCD_DATABASE *) PcdDb)->BuildVersion != PCD_SERVICE_PEIM_VERSION)) {
ASSERT (FALSE);
}
return PcdDb;
}
/**
The function builds the PCD database.
@param FileHandle Handle of the file the external PCD database binary located.
@return Pointer to PCD database.
**/
PEI_PCD_DATABASE *
BuildPcdDatabase (
IN EFI_PEI_FILE_HANDLE FileHandle
)
{
PEI_PCD_DATABASE *Database;
PEI_PCD_DATABASE *PeiPcdDbBinary;
VOID *CallbackFnTable;
UINTN SizeOfCallbackFnTable;
//
// Locate the external PCD database binary for one section of current FFS
//
PeiPcdDbBinary = LocateExPcdBinary (FileHandle);
ASSERT(PeiPcdDbBinary != NULL);
Database = BuildGuidHob (&gPcdDataBaseHobGuid, PeiPcdDbBinary->Length + PeiPcdDbBinary->UninitDataBaseSize);
ZeroMem (Database, PeiPcdDbBinary->Length + PeiPcdDbBinary->UninitDataBaseSize);
//
// PeiPcdDbBinary is smaller than Database
//
CopyMem (Database, PeiPcdDbBinary, PeiPcdDbBinary->Length);
SizeOfCallbackFnTable = Database->LocalTokenCount * sizeof (PCD_PPI_CALLBACK) * PcdGet32 (PcdMaxPeiPcdCallBackNumberPerPcdEntry);
CallbackFnTable = BuildGuidHob (&gEfiCallerIdGuid, SizeOfCallbackFnTable);
ZeroMem (CallbackFnTable, SizeOfCallbackFnTable);
return Database;
}
/**
The function is provided by PCD PEIM and PCD DXE driver to
do the work of reading a HII variable from variable service.
@param VariableGuid The Variable GUID.
@param VariableName The Variable Name.
@param VariableData The output data.
@param VariableSize The size of the variable.
@retval EFI_SUCCESS Operation successful.
@retval EFI_NOT_FOUND Variablel not found.
**/
EFI_STATUS
GetHiiVariable (
IN CONST EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
OUT VOID **VariableData,
OUT UINTN *VariableSize
)
{
UINTN Size;
EFI_STATUS Status;
VOID *Buffer;
EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
ASSERT_EFI_ERROR (Status);
Size = 0;
Status = VariablePpi->GetVariable (
VariablePpi,
VariableName,
(EFI_GUID *) VariableGuid,
NULL,
&Size,
NULL
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Status = PeiServicesAllocatePool (Size, &Buffer);
ASSERT_EFI_ERROR (Status);
Status = VariablePpi->GetVariable (
VariablePpi,
(UINT16 *) VariableName,
(EFI_GUID *) VariableGuid,
NULL,
&Size,
Buffer
);
ASSERT_EFI_ERROR (Status);
*VariableSize = Size;
*VariableData = Buffer;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
/**
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 (
UINTN ExTokenNumber,
CONST EFI_GUID *Guid, OPTIONAL
UINTN TokenNumber,
VOID *Data,
UINTN Size
)
{
EFI_HOB_GUID_TYPE *GuidHob;
PCD_PPI_CALLBACK *CallbackTable;
UINTN Idx;
PEI_PCD_DATABASE *PeiPcdDb;
UINT32 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--;
PeiPcdDb = GetPcdDatabase ();
LocalTokenCount = PeiPcdDb->LocalTokenCount;
if (Guid == 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.
ASSERT (TokenNumber + 1 < (LocalTokenCount + 1));
}
GuidHob = GetFirstGuidHob (&gEfiCallerIdGuid);
ASSERT (GuidHob != NULL);
CallbackTable = GET_GUID_HOB_DATA (GuidHob);
CallbackTable += (TokenNumber * PcdGet32 (PcdMaxPeiPcdCallBackNumberPerPcdEntry));
for (Idx = 0; Idx < PcdGet32 (PcdMaxPeiPcdCallBackNumberPerPcdEntry); Idx++) {
if (CallbackTable[Idx] != NULL) {
CallbackTable[Idx] (Guid,
(Guid == NULL) ? (TokenNumber + 1) : ExTokenNumber,
Data,
Size
);
}
}
}
/**
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
)
{
UINT32 LocalTokenNumber;
UINTN PeiNexTokenNumber;
PEI_PCD_DATABASE *PeiPcdDb;
STRING_HEAD StringTableIdx;
UINTN Offset;
VOID *InternalData;
UINTN MaxSize;
UINT32 LocalTokenCount;
if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {
return EFI_UNSUPPORTED;
}
//
// 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--;
PeiPcdDb = GetPcdDatabase ();
LocalTokenCount = PeiPcdDb->LocalTokenCount;
// 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));
if (PtrType) {
//
// Get MaxSize first, then check new size with max buffer size.
//
GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);
if (*Size > MaxSize) {
*Size = MaxSize;
return EFI_INVALID_PARAMETER;
}
} else {
if (*Size != PeiPcdGetSize (TokenNumber + 1)) {
return EFI_INVALID_PARAMETER;
}
}
//
// We only invoke the callback function for Dynamic Type PCD Entry.
// For Dynamic EX PCD entry, we have invoked the callback function for Dynamic EX
// type PCD entry in ExSetWorker.
//
PeiNexTokenNumber = PeiPcdDb->LocalTokenCount - PeiPcdDb->ExTokenCount;
if (TokenNumber + 1 < PeiNexTokenNumber + 1) {
InvokeCallbackOnSet (0, NULL, TokenNumber + 1, Data, *Size);
}
LocalTokenNumber = GetLocalTokenNumber (PeiPcdDb, TokenNumber + 1);
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
InternalData = (VOID *) ((UINT8 *) PeiPcdDb + Offset);
switch (LocalTokenNumber & PCD_TYPE_ALL_SET) {
case PCD_TYPE_VPD:
case PCD_TYPE_HII:
case PCD_TYPE_HII|PCD_TYPE_STRING:
{
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
case PCD_TYPE_STRING:
if (SetPtrTypeSize (TokenNumber, Size, PeiPcdDb)) {
StringTableIdx = *((STRING_HEAD *)InternalData);
CopyMem ((UINT8 *)PeiPcdDb + PeiPcdDb->StringTableOffset + StringTableIdx, Data, *Size);
return EFI_SUCCESS;
} else {
return EFI_INVALID_PARAMETER;
}
case PCD_TYPE_DATA:
{
if (PtrType) {
if (SetPtrTypeSize (TokenNumber, Size, PeiPcdDb)) {
CopyMem (InternalData, Data, *Size);
return EFI_SUCCESS;
} else {
return EFI_INVALID_PARAMETER;
}
}
switch (*Size) {
case sizeof(UINT8):
*((UINT8 *) InternalData) = *((UINT8 *) Data);
return EFI_SUCCESS;
case sizeof(UINT16):
*((UINT16 *) InternalData) = *((UINT16 *) Data);
return EFI_SUCCESS;
case sizeof(UINT32):
*((UINT32 *) InternalData) = *((UINT32 *) Data);
return EFI_SUCCESS;
case sizeof(UINT64):
*((UINT64 *) InternalData) = *((UINT64 *) Data);
return EFI_SUCCESS;
default:
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
}
}
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
/**
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 Size
)
{
return ExSetWorker (ExTokenNumber, Guid, Data, &Size, 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 *Size,
IN BOOLEAN PtrType
)
{
UINTN TokenNumber;
if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {
return EFI_UNSUPPORTED;
}
TokenNumber = GetExPcdTokenNumber (Guid, ExTokenNumber);
if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
return EFI_NOT_FOUND;
}
InvokeCallbackOnSet (ExTokenNumber, Guid, TokenNumber, Data, *Size);
return SetWorker (TokenNumber, Data, Size, PtrType);
}
/**
Wrapper function for get PCD value for dynamic-ex PCD.
@param Guid Token space guid for dynamic-ex PCD.
@param ExTokenNumber Token number for dyanmic-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, ExTokenNumber), GetSize);
}
/**
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
)
{
UINT32 Offset;
EFI_GUID *Guid;
UINT16 *Name;
VARIABLE_HEAD *VariableHead;
EFI_STATUS Status;
UINTN DataSize;
VOID *Data;
UINT8 *StringTable;
STRING_HEAD StringTableIdx;
PEI_PCD_DATABASE *PeiPcdDb;
UINT32 LocalTokenNumber;
UINT32 LocalTokenCount;
UINT8 *VaraiableDefaultBuffer;
//
// 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--;
PeiPcdDb = GetPcdDatabase ();
LocalTokenCount = PeiPcdDb->LocalTokenCount;
// 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));
ASSERT ((GetSize == PeiPcdGetSize(TokenNumber + 1)) || (GetSize == 0));
LocalTokenNumber = GetLocalTokenNumber (PeiPcdDb, TokenNumber + 1);
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
StringTable = (UINT8 *)PeiPcdDb + PeiPcdDb->StringTableOffset;
switch (LocalTokenNumber & PCD_TYPE_ALL_SET) {
case PCD_TYPE_VPD:
{
VPD_HEAD *VpdHead;
VpdHead = (VPD_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
return (VOID *) ((UINTN) PcdGet32 (PcdVpdBaseAddress) + VpdHead->Offset);
}
case PCD_TYPE_HII|PCD_TYPE_STRING:
case PCD_TYPE_HII:
{
VariableHead = (VARIABLE_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
Guid = (EFI_GUID *) ((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset) + 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.
//
VaraiableDefaultBuffer = (UINT8 *) &StringTable[*(STRING_HEAD*)((UINT8*) PeiPcdDb + VariableHead->DefaultValueOffset)];
} else {
VaraiableDefaultBuffer = (UINT8 *) PeiPcdDb + VariableHead->DefaultValueOffset;
}
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if ((Status == EFI_SUCCESS) && (DataSize >= (VariableHead->Offset + GetSize))) {
if (GetSize == 0) {
//
// It is a pointer type. So get the MaxSize reserved for
// this PCD entry.
//
GetPtrTypeSize (TokenNumber, &GetSize, PeiPcdDb);
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.
//
CopyMem (VaraiableDefaultBuffer, (UINT8 *) Data + VariableHead->Offset, GetSize);
}
return (VOID *) VaraiableDefaultBuffer;
}
case PCD_TYPE_DATA:
return (VOID *) ((UINT8 *)PeiPcdDb + Offset);
case PCD_TYPE_STRING:
StringTableIdx = * (STRING_HEAD*) ((UINT8 *) PeiPcdDb + Offset);
return (VOID *) (&StringTable[StringTableIdx]);
default:
ASSERT (FALSE);
break;
}
ASSERT (FALSE);
return NULL;
}
/**
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 UINTN ExTokenNumber
)
{
UINT32 Index;
DYNAMICEX_MAPPING *ExMap;
EFI_GUID *GuidTable;
EFI_GUID *MatchGuid;
UINTN MatchGuidIdx;
PEI_PCD_DATABASE *PeiPcdDb;
PeiPcdDb = GetPcdDatabase();
ExMap = (DYNAMICEX_MAPPING *)((UINT8 *)PeiPcdDb + PeiPcdDb->ExMapTableOffset);
GuidTable = (EFI_GUID *)((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset);
MatchGuid = ScanGuid (GuidTable, PeiPcdDb->GuidTableCount * sizeof(EFI_GUID), 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 < PeiPcdDb->ExTokenCount; Index++) {
if ((ExTokenNumber == ExMap[Index].ExTokenNumber) &&
(MatchGuidIdx == ExMap[Index].ExGuidIndex)) {
return ExMap[Index].TokenNumber;
}
}
return PCD_INVALID_TOKEN_NUMBER;
}
/**
Get PCD database from GUID HOB in PEI phase.
@return Pointer to PCD database.
**/
PEI_PCD_DATABASE *
GetPcdDatabase (
VOID
)
{
EFI_HOB_GUID_TYPE *GuidHob;
GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
ASSERT (GuidHob != NULL);
return (PEI_PCD_DATABASE *) GET_GUID_HOB_DATA (GuidHob);
}
/**
Get index of PCD entry in size table.
@param LocalTokenNumberTableIdx Index of this PCD in local token number table.
@param Database Pointer to PCD database in PEI phase.
@return index of PCD entry in size table.
**/
UINTN
GetSizeTableIndex (
IN UINTN LocalTokenNumberTableIdx,
IN PEI_PCD_DATABASE *Database
)
{
UINTN Index;
UINTN SizeTableIdx;
UINTN LocalTokenNumber;
SizeTableIdx = 0;
for (Index = 0; Index < LocalTokenNumberTableIdx; Index++) {
LocalTokenNumber = *((UINT32 *)((UINT8 *)Database + Database->LocalTokenNumberTableOffset) + 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;
}
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