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

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/** @file
Private functions used by PCD DXE driver.s
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"
//
// Build Tool will generate DXE_PCD_DB_INIT_VALUE in Autogen.h
// Compression Algorithm will take care of the size optimization.
//
PCD_DATABASE * mPcdDatabase;
LIST_ENTRY *mCallbackFnTable;
VOID *
GetWorker (
UINTN TokenNumber,
UINTN GetSize
)
{
UINT32 *LocalTokenNumberTable;
UINT16 *SizeTable;
BOOLEAN IsPeiDb;
UINTN Size;
UINT32 Offset;
EFI_GUID *GuidTable;
UINT16 *StringTable;
EFI_GUID *Guid;
UINT16 *Name;
VARIABLE_HEAD *VariableHead;
EFI_STATUS Status;
UINTN DataSize;
VOID *Data;
VPD_HEAD *VpdHead;
UINT8 *PcdDb;
UINT16 StringTableIdx;
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--;
ASSERT (TokenNumber < PCD_TOTAL_TOKEN_NUMBER);
Size = DxePcdGetSize (TokenNumber + 1);
ASSERT (GetSize == Size || GetSize == 0);
IsPeiDb = (TokenNumber < PEI_LOCAL_TOKEN_NUMBER) ? TRUE : FALSE;
LocalTokenNumberTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.LocalTokenNumberTable :
mPcdDatabase->DxeDb.Init.LocalTokenNumberTable;
SizeTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.SizeTable:
mPcdDatabase->DxeDb.Init.SizeTable;
TokenNumber = IsPeiDb ? TokenNumber :
TokenNumber - PEI_LOCAL_TOKEN_NUMBER;
LocalTokenNumber = LocalTokenNumberTable[TokenNumber];
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == PCD_TYPE_SKU_ENABLED) {
LocalTokenNumber = GetSkuEnabledTokenNumber (LocalTokenNumber & ~PCD_TYPE_SKU_ENABLED, Size, IsPeiDb);
}
PcdDb = IsPeiDb ? ((UINT8 *) &mPcdDatabase->PeiDb) : ((UINT8 *) &mPcdDatabase->DxeDb);
StringTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.StringTable :
mPcdDatabase->DxeDb.Init.StringTable;
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
VpdHead = (VPD_HEAD *) ((UINT8 *) PcdDb + Offset);
return (VOID *) (UINTN) (FixedPcdGet32(PcdVpdBaseAddress) + VpdHead->Offset);
case PCD_TYPE_HII:
GuidTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.GuidTable :
mPcdDatabase->DxeDb.Init.GuidTable;
VariableHead = (VARIABLE_HEAD *) (PcdDb + Offset);
Guid = &(GuidTable[VariableHead->GuidTableIndex]);
Name = &(StringTable[VariableHead->StringIndex]);
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if (Status == EFI_SUCCESS) {
ASSERT (DataSize >= (UINTN) (VariableHead->Offset + Size));
return (UINT8 *) Data + VariableHead->Offset;
} else {
//
// Return the default value specified by Platform Integrator
//
return (VOID *) ((UINT8 *) PcdDb + VariableHead->DefaultValueOffset);
}
case PCD_TYPE_STRING:
StringTableIdx = (UINT16) *((UINT8 *) PcdDb + Offset);
return (VOID *) &StringTable[StringTableIdx];
case PCD_TYPE_DATA:
return (VOID *) ((UINT8 *) PcdDb + Offset);
break;
default:
ASSERT (FALSE);
break;
}
ASSERT (FALSE);
return NULL;
}
EFI_STATUS
DxeRegisterCallBackWorker (
IN UINTN TokenNumber,
IN CONST 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.
//
TokenNumber--;
ListHead = &mCallbackFnTable[TokenNumber];
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;
}
EFI_STATUS
DxeUnRegisterCallBackWorker (
IN UINTN TokenNumber,
IN CONST 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.
//
TokenNumber--;
ListHead = &mCallbackFnTable[TokenNumber];
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;
}
UINTN
ExGetNextTokeNumber (
IN CONST EFI_GUID *Guid,
IN UINTN TokenNumber,
IN EFI_GUID *GuidTable,
IN UINTN SizeOfGuidTable,
IN DYNAMICEX_MAPPING *ExMapTable,
IN UINTN SizeOfExMapTable
)
{
EFI_GUID *MatchGuid;
UINTN Idx;
UINTN GuidTableIdx;
BOOLEAN Found;
MatchGuid = ScanGuid (GuidTable, SizeOfGuidTable, Guid);
if (MatchGuid == NULL) {
return PCD_INVALID_TOKEN_NUMBER;
}
Found = FALSE;
GuidTableIdx = MatchGuid - GuidTable;
for (Idx = 0; Idx < SizeOfExMapTable; Idx++) {
if (ExMapTable[Idx].ExGuidIndex == GuidTableIdx) {
Found = TRUE;
break;
}
}
if (Found) {
if (TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
return ExMapTable[Idx].ExTokenNumber;
}
for ( ; Idx < SizeOfExMapTable; Idx++) {
if (ExMapTable[Idx].ExTokenNumber == TokenNumber) {
Idx++;
if (Idx == SizeOfExMapTable) {
//
// Exceed the length of ExMap Table
//
return PCD_INVALID_TOKEN_NUMBER;
} else if (ExMapTable[Idx].ExGuidIndex == GuidTableIdx) {
//
// Found the next match
//
return ExMapTable[Idx].ExTokenNumber;
} else {
//
// Guid has been changed. It is the next Token Space Guid.
// We should flag no more TokenNumber.
//
return PCD_INVALID_TOKEN_NUMBER;
}
}
}
}
return PCD_INVALID_TOKEN_NUMBER;
}
VOID
BuildPcdDxeDataBase (
VOID
)
{
PEI_PCD_DATABASE *PeiDatabase;
EFI_HOB_GUID_TYPE *GuidHob;
UINTN Idx;
mPcdDatabase = AllocateZeroPool (sizeof(PCD_DATABASE));
ASSERT (mPcdDatabase != NULL);
GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
if (GuidHob != NULL) {
//
// We will copy over the PEI phase's PCD Database.
//
// 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);
//
// Copy PCD Entries refereneced in PEI phase to PCD DATABASE
//
CopyMem (&mPcdDatabase->PeiDb, PeiDatabase, sizeof (PEI_PCD_DATABASE));
}
//
// Copy PCD Entries with default value to PCD DATABASE
//
CopyMem (&mPcdDatabase->DxeDb.Init, &gDXEPcdDbInit, sizeof(DXE_PCD_DATABASE_INIT));
//
// Initialized the Callback Function Table
//
if (PCD_TOTAL_TOKEN_NUMBER != 0) {
mCallbackFnTable = AllocateZeroPool (PCD_TOTAL_TOKEN_NUMBER * sizeof (LIST_ENTRY));
}
for (Idx = 0; Idx < PCD_TOTAL_TOKEN_NUMBER; Idx++) {
InitializeListHead (&mCallbackFnTable[Idx]);
}
return;
}
EFI_STATUS
GetHiiVariable (
IN EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
OUT VOID ** VariableData,
OUT UINTN *VariableSize
)
{
UINTN Size;
EFI_STATUS Status;
VOID *Buffer;
Size = 0;
Buffer = NULL;
Status = EfiGetVariable (
(UINT16 *)VariableName,
VariableGuid,
NULL,
&Size,
Buffer
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = AllocatePool (Size);
ASSERT (Buffer != NULL);
Status = EfiGetVariable (
VariableName,
VariableGuid,
NULL,
&Size,
Buffer
);
ASSERT (Status == EFI_SUCCESS);
}
*VariableData = Buffer;
*VariableSize = Size;
return Status;
}
UINT32
GetSkuEnabledTokenNumber (
UINT32 LocalTokenNumber,
UINTN Size,
BOOLEAN IsPeiDb
)
{
SKU_HEAD *SkuHead;
SKU_ID *SkuIdTable;
INTN i;
UINT8 *Value;
SKU_ID *PhaseSkuIdTable;
UINT8 *PcdDb;
ASSERT ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0);
PcdDb = IsPeiDb ? (UINT8 *) &mPcdDatabase->PeiDb : (UINT8 *) &mPcdDatabase->DxeDb;
SkuHead = (SKU_HEAD *) (PcdDb + (LocalTokenNumber & PCD_DATABASE_OFFSET_MASK));
Value = (UINT8 *) (PcdDb + SkuHead->SkuDataStartOffset);
PhaseSkuIdTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.SkuIdTable :
mPcdDatabase->DxeDb.Init.SkuIdTable;
SkuIdTable = &PhaseSkuIdTable[SkuHead->SkuIdTableOffset];
for (i = 0; i < SkuIdTable[0]; i++) {
if (mPcdDatabase->PeiDb.Init.SystemSkuId == SkuIdTable[i + 1]) {
break;
}
}
ASSERT (i < SkuIdTable[0]);
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
Value = (UINT8 *) &(((VPD_HEAD *) Value)[i]);
return (UINT32) ((Value - PcdDb) | PCD_TYPE_VPD);
case PCD_TYPE_HII:
Value = (UINT8 *) &(((VARIABLE_HEAD *) Value)[i]);
return (UINT32) ((Value - PcdDb) | PCD_TYPE_HII);
case PCD_TYPE_DATA:
Value += Size * i;
return (UINT32) (Value - PcdDb);
default:
ASSERT (FALSE);
}
ASSERT (FALSE);
return 0;
}
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.
//
TokenNumber--;
ListHead = &mCallbackFnTable[TokenNumber];
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;
}
EFI_STATUS
SetWorker (
UINTN TokenNumber,
VOID *Data,
UINTN Size,
BOOLEAN PtrType
)
{
UINT32 *LocalTokenNumberTable;
BOOLEAN IsPeiDb;
UINT32 LocalTokenNumber;
EFI_GUID *GuidTable;
UINT16 *StringTable;
EFI_GUID *Guid;
UINT16 *Name;
UINTN VariableOffset;
VOID *InternalData;
VARIABLE_HEAD *VariableHead;
UINTN Offset;
UINT8 *PcdDb;
//
// 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 < PCD_TOTAL_TOKEN_NUMBER);
if (PtrType) {
ASSERT (Size <= DxePcdGetSize (TokenNumber + 1));
} else {
ASSERT (Size == DxePcdGetSize (TokenNumber + 1));
}
IsPeiDb = (TokenNumber < PEI_LOCAL_TOKEN_NUMBER) ? TRUE : FALSE;
LocalTokenNumberTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.LocalTokenNumberTable :
mPcdDatabase->DxeDb.Init.LocalTokenNumberTable;
if ((TokenNumber < PEI_NEX_TOKEN_NUMBER) ||
(TokenNumber >= PEI_LOCAL_TOKEN_NUMBER || TokenNumber < (PEI_LOCAL_TOKEN_NUMBER + DXE_NEX_TOKEN_NUMBER))) {
InvokeCallbackOnSet (0, NULL, TokenNumber + 1, Data, Size);
}
TokenNumber = IsPeiDb ? TokenNumber
: TokenNumber - PEI_LOCAL_TOKEN_NUMBER;
LocalTokenNumber = LocalTokenNumberTable[TokenNumber];
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == PCD_TYPE_SKU_ENABLED) {
LocalTokenNumber = GetSkuEnabledTokenNumber (LocalTokenNumber & ~PCD_TYPE_SKU_ENABLED, Size, IsPeiDb);
}
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
PcdDb = IsPeiDb ? ((UINT8 *) &mPcdDatabase->PeiDb) : ((UINT8 *) &mPcdDatabase->DxeDb);
StringTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.StringTable :
mPcdDatabase->DxeDb.Init.StringTable;
InternalData = PcdDb + Offset;
switch (LocalTokenNumber & ~PCD_DATABASE_OFFSET_MASK) {
case PCD_TYPE_VPD:
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
case PCD_TYPE_STRING:
CopyMem (&StringTable[*((UINT16 *)InternalData)], Data, Size);
return EFI_SUCCESS;
case PCD_TYPE_HII:
//
// Bug Bug: Please implement this
//
GuidTable = IsPeiDb ? mPcdDatabase->PeiDb.Init.GuidTable :
mPcdDatabase->DxeDb.Init.GuidTable;
VariableHead = (VARIABLE_HEAD *) (PcdDb + Offset);
Guid = &(GuidTable[VariableHead->GuidTableIndex]);
Name = &(StringTable[VariableHead->StringIndex]);
VariableOffset = VariableHead->Offset;
return SetHiiVariable (Guid, Name, Data, Size, VariableOffset);
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;
}
default:
ASSERT (FALSE);
break;
}
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
VOID *
ExGetWorker (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINTN GetSize
)
{
return GetWorker(GetExPcdTokenNumber (Guid, (UINT32) ExTokenNumber), GetSize);
}
EFI_STATUS
ExSetWorker (
IN UINTN ExTokenNumber,
IN CONST EFI_GUID *Guid,
VOID *Data,
UINTN SetSize,
BOOLEAN PtrType
)
{
UINTN TokenNumber;
TokenNumber = GetExPcdTokenNumber (Guid, (UINT32) ExTokenNumber);
InvokeCallbackOnSet ((UINT32) ExTokenNumber, Guid, TokenNumber, Data, SetSize);
SetWorker (TokenNumber, Data, SetSize, PtrType);
return EFI_SUCCESS;
}
EFI_STATUS
SetHiiVariable (
IN EFI_GUID *VariableGuid,
IN UINT16 *VariableName,
IN CONST VOID *Data,
IN UINTN DataSize,
IN UINTN Offset
)
{
UINTN Size;
VOID *Buffer;
EFI_STATUS Status;
UINT32 Attribute;
Size = 0;
Status = EfiGetVariable (
(UINT16 *)VariableName,
VariableGuid,
&Attribute,
&Size,
NULL
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = AllocatePool (Size);
ASSERT (Buffer != NULL);
Status = EfiGetVariable (
VariableName,
VariableGuid,
&Attribute,
&Size,
Buffer
);
ASSERT_EFI_ERROR (Status);
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);
} else {
Attribute = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
Size = DataSize + Offset;
Buffer = AllocateZeroPool (Size);
ASSERT (Buffer != NULL);
CopyMem ((UINT8 *)Buffer + Offset, Data, DataSize);
}
return EfiSetVariable (
VariableName,
VariableGuid,
Attribute,
Size,
Buffer
);
}
UINTN
GetExPcdTokenNumber (
IN CONST EFI_GUID *Guid,
IN UINT32 ExTokenNumber
)
{
UINT32 i;
DYNAMICEX_MAPPING *ExMap;
EFI_GUID *GuidTable;
EFI_GUID *MatchGuid;
UINTN MatchGuidIdx;
ExMap = mPcdDatabase->PeiDb.Init.ExMapTable;
GuidTable = mPcdDatabase->PeiDb.Init.GuidTable;
MatchGuid = ScanGuid (GuidTable, sizeof(mPcdDatabase->PeiDb.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;
}
}
ExMap = mPcdDatabase->DxeDb.Init.ExMapTable;
GuidTable = mPcdDatabase->DxeDb.Init.GuidTable;
MatchGuid = ScanGuid (GuidTable, sizeof(mPcdDatabase->DxeDb.Init.GuidTable), Guid);
ASSERT (MatchGuid != NULL);
MatchGuidIdx = MatchGuid - GuidTable;
for (i = 0; i < DXE_EXMAPPING_TABLE_SIZE; i++) {
if ((ExTokenNumber == ExMap[i].ExTokenNumber) &&
(MatchGuidIdx == ExMap[i].ExGuidIndex)) {
return ExMap[i].LocalTokenNumber + PEI_LOCAL_TOKEN_NUMBER;
}
}
ASSERT (FALSE);
return 0;
}
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