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audk/EdkModulePkg/Universal/PCD/Pei/Service.c

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/** @file
Private functions used by PCD PEIM.
Copyright (c) 2006, Intel Corporation
All rights reserved. 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.
Module Name: Service.c
**/
#include "Service.h"
/**
The function registers the CallBackOnSet fucntion
according to TokenNumber and EFI_GUID space.
@param[in] TokenNumber The token number.
@param[in] Guid The GUID space.
@param[in] CallBackFunction The Callback function to be registered.
@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.
--*/
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;
UINTN TokenNumber;
UINTN Idx;
if (Guid == NULL) {
TokenNumber = ExTokenNumber;
ASSERT (TokenNumber < PEI_NEX_TOKEN_NUMBER);
} else {
TokenNumber = GetExPcdTokenNumber (Guid, ExTokenNumber);
ASSERT (TokenNumber < PEI_LOCAL_TOKEN_NUMBER);
}
LocalTokenNumber = GetPcdDatabase()->Init.LocalTokenNumberTable[TokenNumber];
ASSERT ((LocalTokenNumber & PCD_TYPE_HII) == 0);
ASSERT ((LocalTokenNumber & PCD_TYPE_VPD) == 0);
GuidHob = GetFirstGuidHob (&gPcdPeiCallbackFnTableHobGuid);
ASSERT (GuidHob != NULL);
CallbackTable = GET_GUID_HOB_DATA (GuidHob);
CallbackTable = CallbackTable + (TokenNumber * FixedPcdGet32(PcdMaxPeiPcdCallBackNumberPerPcdEntry));
Compare = Register? NULL: CallBackFunction;
Assign = Register? CallBackFunction: NULL;
for (Idx = 0; Idx < FixedPcdGet32(PcdMaxPeiPcdCallBackNumberPerPcdEntry); Idx++) {
if (CallbackTable[Idx] == Compare) {
CallbackTable[Idx] = Assign;
return EFI_SUCCESS;
}
}
return Register? EFI_OUT_OF_RESOURCES : EFI_NOT_FOUND;
}
/**
The function builds the PCD database based on the
PCD_IMAGE on the flash.
@param[in] PcdImageOnFlash The PCD image on flash.
@retval VOID
--*/
VOID
BuildPcdDatabase (
VOID
)
{
PEI_PCD_DATABASE *Database;
VOID *CallbackFnTable;
UINTN SizeOfCallbackFnTable;
Database = BuildGuidHob (&gPcdDataBaseHobGuid, sizeof (PEI_PCD_DATABASE));
ZeroMem (Database, sizeof (PEI_PCD_DATABASE));
//
// gPEIPcdDbInit is smaller than PEI_PCD_DATABASE
//
CopyMem (&Database->Init, &gPEIPcdDbInit, sizeof (gPEIPcdDbInit));
SizeOfCallbackFnTable = PEI_LOCAL_TOKEN_NUMBER * sizeof (PCD_PPI_CALLBACK) * FixedPcdGet32(PcdMaxPeiPcdCallBackNumberPerPcdEntry);
CallbackFnTable = BuildGuidHob (&gPcdPeiCallbackFnTableHobGuid, SizeOfCallbackFnTable);
ZeroMem (CallbackFnTable, SizeOfCallbackFnTable);
return;
}
/**
The function is provided by PCD PEIM and PCD DXE driver to
do the work of reading a HII variable from variable service.
@param[in] VariableGuid The Variable GUID.
@param[in] VariableName The Variable Name.
@param[out] VariableData The output data.
@param[out] VariableSize The size of the variable.
@retval EFI_SUCCESS Operation successful.
@retval EFI_SUCCESS 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_VARIABLE_PPI *VariablePpi;
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariablePpiGuid, 0, NULL, (VOID **) &VariablePpi);
ASSERT_EFI_ERROR (Status);
Size = 0;
Status = VariablePpi->PeiGetVariable (
GetPeiServicesTablePointer (),
VariableName,
(EFI_GUID *) VariableGuid,
NULL,
&Size,
NULL
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Status = PeiServicesAllocatePool (Size, &Buffer);
ASSERT_EFI_ERROR (Status);
Status = VariablePpi->PeiGetVariable (
GetPeiServicesTablePointer (),
(UINT16 *) VariableName,
(EFI_GUID *) VariableGuid,
NULL,
&Size,
Buffer
);
ASSERT_EFI_ERROR (Status);
*VariableSize = Size;
*VariableData = Buffer;
return EFI_SUCCESS;
} else {
return EFI_NOT_FOUND;
}
}
UINT32
GetSkuEnabledTokenNumber (
UINT32 LocalTokenNumber,
UINTN Size
)
{
PEI_PCD_DATABASE *PeiPcdDb;
SKU_HEAD *SkuHead;
SKU_ID *SkuIdTable;
INTN i;
UINT8 *Value;
PeiPcdDb = GetPcdDatabase ();
ASSERT ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0);
SkuHead = (SKU_HEAD *) ((UINT8 *)PeiPcdDb + (LocalTokenNumber & PCD_DATABASE_OFFSET_MASK));
Value = (UINT8 *) ((UINT8 *)PeiPcdDb + (SkuHead->SkuDataStartOffset));
SkuIdTable = (SKU_ID *) ((UINT8 *)PeiPcdDb + (SkuHead->SkuIdTableOffset));
for (i = 0; i < SkuIdTable[0]; i++) {
if (PeiPcdDb->Init.SystemSkuId == SkuIdTable[i + 1]) {
break;
}
}
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
Value += sizeof(VPD_HEAD) * i;
return ((Value - (UINT8 *) PeiPcdDb) | PCD_TYPE_VPD);
case PCD_TYPE_HII:
Value += sizeof(VARIABLE_HEAD) * i;
return ((Value - (UINT8 *) PeiPcdDb) | PCD_TYPE_HII);
case PCD_TYPE_DATA:
Value += Size * i;
return (Value - (UINT8 *) PeiPcdDb);
default:
ASSERT (FALSE);
}
ASSERT (FALSE);
return 0;
}
VOID
InvokeCallbackOnSet (
UINT32 ExTokenNumber,
CONST EFI_GUID *Guid, OPTIONAL
UINTN TokenNumber,
VOID *Data,
UINTN Size
)
{
EFI_HOB_GUID_TYPE *GuidHob;
PCD_PPI_CALLBACK *CallbackTable;
UINTN Idx;
if (Guid == NULL)
ASSERT (TokenNumber < PEI_LOCAL_TOKEN_NUMBER);
GuidHob = GetFirstGuidHob (&gPcdPeiCallbackFnTableHobGuid);
ASSERT (GuidHob != NULL);
CallbackTable = GET_GUID_HOB_DATA (GuidHob);
CallbackTable += (TokenNumber * FixedPcdGet32(PcdMaxPeiPcdCallBackNumberPerPcdEntry));
for (Idx = 0; Idx < FixedPcdGet32(PcdMaxPeiPcdCallBackNumberPerPcdEntry); Idx++) {
if (CallbackTable[Idx] != NULL) {
CallbackTable[Idx] (Guid,
(Guid == NULL)? TokenNumber: ExTokenNumber,
Data,
Size
);
}
}
}
EFI_STATUS
SetWorker (
UINTN TokenNumber,
VOID *Data,
UINTN Size,
BOOLEAN PtrType
)
{
UINT32 LocalTokenNumber;
PEI_PCD_DATABASE *PeiPcdDb;
UINT16 StringTableIdx;
UINTN Offset;
VOID *InternalData;
ASSERT (TokenNumber < PEI_LOCAL_TOKEN_NUMBER);
PeiPcdDb = GetPcdDatabase ();
LocalTokenNumber = PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber];
if (PtrType) {
ASSERT (PeiPcdDb->Init.SizeTable[TokenNumber] >= Size);
} else {
ASSERT (PeiPcdDb->Init.SizeTable[TokenNumber] == Size);
}
//
// 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.
//
if (TokenNumber < PEI_NEX_TOKEN_NUMBER) {
InvokeCallbackOnSet (0, NULL, TokenNumber, Data, Size);
}
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == PCD_TYPE_SKU_ENABLED) {
LocalTokenNumber = GetSkuEnabledTokenNumber (LocalTokenNumber & ~PCD_TYPE_SKU_ENABLED, Size);
}
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
InternalData = (VOID *) ((UINT8 *) PeiPcdDb + Offset);
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
case PCD_TYPE_HII:
{
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
case PCD_TYPE_STRING:
StringTableIdx = *((UINT16 *)InternalData);
CopyMem (&PeiPcdDb->Init.StringTable[StringTableIdx], Data, Size);
break;
case PCD_TYPE_DATA:
{
if (PtrType) {
CopyMem (InternalData, Data, Size);
return EFI_SUCCESS;
}
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;
}
EFI_STATUS
ExSetWorker (
IN UINTN ExTokenNumber,
IN CONST EFI_GUID *Guid,
VOID *Data,
UINTN Size,
BOOLEAN PtrType
)
{
UINTN TokenNumber;
TokenNumber = GetExPcdTokenNumber (Guid, ExTokenNumber);
InvokeCallbackOnSet (ExTokenNumber, Guid, TokenNumber, Data, Size);
SetWorker (TokenNumber, Data, Size, PtrType);
return EFI_SUCCESS;
}
VOID *
ExGetWorker (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINTN GetSize
)
{
return GetWorker (GetExPcdTokenNumber (Guid, ExTokenNumber), GetSize);
}
VOID *
GetWorker (
UINTN TokenNumber,
UINTN GetSize
)
{
UINT32 Offset;
EFI_GUID *Guid;
UINT16 *Name;
VARIABLE_HEAD *VariableHead;
EFI_STATUS Status;
UINTN DataSize;
VOID *Data;
UINT16 *StringTable;
UINT16 StringTableIdx;
PEI_PCD_DATABASE *PeiPcdDb;
UINT32 LocalTokenNumber;
UINTN Size;
ASSERT (TokenNumber < PEI_LOCAL_TOKEN_NUMBER);
Size = PeiPcdGetSize(TokenNumber);
ASSERT (GetSize == Size || GetSize == 0);
PeiPcdDb = GetPcdDatabase ();
LocalTokenNumber = PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber];
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == PCD_TYPE_SKU_ENABLED) {
LocalTokenNumber = GetSkuEnabledTokenNumber (LocalTokenNumber & ~PCD_TYPE_SKU_ENABLED, Size);
}
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
StringTable = PeiPcdDb->Init.StringTable;
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
{
VPD_HEAD *VpdHead;
VpdHead = (VPD_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
return (VOID *) (FixedPcdGet32(PcdVpdBaseAddress) + VpdHead->Offset);
}
case PCD_TYPE_HII:
{
VariableHead = (VARIABLE_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
Guid = &(PeiPcdDb->Init.GuidTable[VariableHead->GuidTableIndex]);
Name = &StringTable[VariableHead->StringIndex];
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if (Status == EFI_SUCCESS) {
ASSERT (DataSize >= (UINTN) (VariableHead->Offset + Size));
return (VOID *) ((UINT8 *) Data + VariableHead->Offset);
} else {
//
// BugBug: Need to support default value. The current implementation
// will return a memory buffer with ALL ZERO.
//
return AllocateZeroPool (Size);
}
}
case PCD_TYPE_DATA:
return (VOID *) ((UINT8 *)PeiPcdDb + Offset);
break;
case PCD_TYPE_STRING:
StringTableIdx = (UINT16) *((UINT8 *) PeiPcdDb + Offset);
return (VOID *) (&StringTable[StringTableIdx]);
default:
ASSERT (FALSE);
break;
}
ASSERT (FALSE);
return NULL;
}
UINTN
GetExPcdTokenNumber (
IN CONST EFI_GUID *Guid,
IN UINT32 ExTokenNumber
)
{
UINT32 i;
DYNAMICEX_MAPPING *ExMap;
EFI_GUID *GuidTable;
EFI_GUID *MatchGuid;
UINTN MatchGuidIdx;
PEI_PCD_DATABASE *PeiPcdDb;
PeiPcdDb = GetPcdDatabase();
ExMap = PeiPcdDb->Init.ExMapTable;
GuidTable = PeiPcdDb->Init.GuidTable;
MatchGuid = ScanGuid (GuidTable, sizeof(PeiPcdDb->Init.GuidTable), Guid);
ASSERT (MatchGuid != NULL);
MatchGuidIdx = MatchGuid - GuidTable;
for (i = 0; i < PEI_EXMAPPING_TABLE_SIZE; i++) {
if ((ExTokenNumber == ExMap[i].ExTokenNumber) &&
(MatchGuidIdx == ExMap[i].ExGuidIndex)) {
return ExMap[i].LocalTokenNumber;
}
}
ASSERT (FALSE);
return 0;
}
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);
}
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