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audk/MdeModulePkg/Universal/PCD/Pei/Pcd.c

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/** @file
PCD PEIM manage PCD database to manage all dynamic PCD in PEI phase. PCD PEIM
also produce PCD_PPI.
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.
**/
#include "Service.h"
PCD_PPI mPcdPpiInstance = {
PeiPcdSetSku,
PeiPcdGet8,
PeiPcdGet16,
PeiPcdGet32,
PeiPcdGet64,
PeiPcdGetPtr,
PeiPcdGetBool,
PeiPcdGetSize,
PeiPcdGet8Ex,
PeiPcdGet16Ex,
PeiPcdGet32Ex,
PeiPcdGet64Ex,
PeiPcdGetPtrEx,
PeiPcdGetBoolEx,
PeiPcdGetSizeEx,
PeiPcdSet8,
PeiPcdSet16,
PeiPcdSet32,
PeiPcdSet64,
PeiPcdSetPtr,
PeiPcdSetBool,
PeiPcdSet8Ex,
PeiPcdSet16Ex,
PeiPcdSet32Ex,
PeiPcdSet64Ex,
PeiPcdSetPtrEx,
PeiPcdSetBoolEx,
PeiRegisterCallBackOnSet,
PcdUnRegisterCallBackOnSet,
PeiPcdGetNextToken,
PeiPcdGetNextTokenSpace
};
STATIC EFI_PEI_PPI_DESCRIPTOR mPpiPCD = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gPcdPpiGuid,
&mPcdPpiInstance
};
/**
Main entry for PCD PEIM driver.
This routine initialize the PCD database for PEI phase and install PCD_PPI.
@param FfsHeader Pointer to PEIM FFS header image
@param PeiServices Pointer to EFI_PEI_SERVICES
@return Status of install PCD_PPI
**/
EFI_STATUS
EFIAPI
PcdPeimInit (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
{
BuildPcdDatabase ();
return PeiServicesInstallPpi (&mPpiPCD);
}
/**
Sets the SKU value for subsequent calls to set or get PCD token values.
SetSku() sets the SKU Id to be used for subsequent calls to set or get PCD values.
SetSku() is normally called only once by the system.
For each item (token), the database can hold a single value that applies to all SKUs,
or multiple values, where each value is associated with a specific SKU Id. Items with multiple,
SKU-specific values are called SKU enabled.
The SKU Id of zero is reserved as a default. The valid SkuId range is 1 to 255.
For tokens that are not SKU enabled, the system ignores any set SKU Id and works with the
single value for that token. For SKU-enabled tokens, the system will use the SKU Id set by the
last call to SetSku(). If no SKU Id is set or the currently set SKU Id isn't valid for the specified token,
the system uses the default SKU Id. If the system attempts to use the default SKU Id and no value has been
set for that Id, the results are unpredictable.
@param[in] SkuId The SKU value that will be used when the PCD service will retrieve and
set values associated with a PCD token.
@retval VOID
**/
VOID
EFIAPI
PeiPcdSetSku (
IN UINTN SkuId
)
{
GetPcdDatabase()->Init.SystemSkuId = (SKU_ID) SkuId;
return;
}
/**
Retrieves an 8-bit value for a given PCD token.
Retrieves the current byte-sized value for a PCD token number.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The UINT8 value.
**/
UINT8
EFIAPI
PeiPcdGet8 (
IN UINTN TokenNumber
)
{
return *((UINT8 *) GetWorker (TokenNumber, sizeof (UINT8)));
}
/**
Retrieves an 16-bit value for a given PCD token.
Retrieves the current 16-bits value for a PCD token number.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The UINT16 value.
**/
UINT16
EFIAPI
PeiPcdGet16 (
IN UINTN TokenNumber
)
{
return ReadUnaligned16 (GetWorker (TokenNumber, sizeof (UINT16)));
}
/**
Retrieves an 32-bit value for a given PCD token.
Retrieves the current 32-bits value for a PCD token number.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The UINT32 value.
**/
UINT32
EFIAPI
PeiPcdGet32 (
IN UINTN TokenNumber
)
{
return ReadUnaligned32 (GetWorker (TokenNumber, sizeof (UINT32)));
}
/**
Retrieves an 64-bit value for a given PCD token.
Retrieves the current 64-bits value for a PCD token number.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The UINT64 value.
**/
UINT64
EFIAPI
PeiPcdGet64 (
IN UINTN TokenNumber
)
{
return ReadUnaligned64 (GetWorker (TokenNumber, sizeof (UINT64)));
}
/**
Retrieves a pointer to a value for a given PCD token.
Retrieves the current pointer to the buffer for a PCD token number.
Do not make any assumptions about the alignment of the pointer that
is returned by this function call. If the TokenNumber is invalid,
the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The pointer to the buffer to be retrived.
**/
VOID *
EFIAPI
PeiPcdGetPtr (
IN UINTN TokenNumber
)
{
return GetWorker (TokenNumber, 0);
}
/**
Retrieves a Boolean value for a given PCD token.
Retrieves the current boolean value for a PCD token number.
Do not make any assumptions about the alignment of the pointer that
is returned by this function call. If the TokenNumber is invalid,
the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The Boolean value.
**/
BOOLEAN
EFIAPI
PeiPcdGetBool (
IN UINTN TokenNumber
)
{
return *((BOOLEAN *) GetWorker (TokenNumber, sizeof (BOOLEAN)));
}
/**
Retrieves the size of the value for a given PCD token.
Retrieves the current size of a particular PCD token.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] TokenNumber The PCD token number.
@return The size of the value for the PCD token.
**/
UINTN
EFIAPI
PeiPcdGetSize (
IN UINTN TokenNumber
)
{
PEI_PCD_DATABASE *PeiPcdDb;
UINTN Size;
UINTN MaxSize;
//
// If DebugAssertEnabled is TRUE, we still need to provide the GET size
// function as GetWorker and SetWoker need this function to do ASSERT.
//
if ((!FeaturePcdGet(PcdPeiPcdDatabaseGetSizeEnabled)) &&
(!DebugAssertEnabled ())) {
return 0;
}
PeiPcdDb = GetPcdDatabase ();
//
// 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 < PEI_LOCAL_TOKEN_NUMBER + 1);
Size = (PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber] & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT;
if (Size == 0) {
//
// For pointer type, we need to scan the SIZE_TABLE to get the current size.
//
return GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);
} else {
return Size;
}
}
/**
Retrieves an 8-bit value for a given PCD token.
Retrieves the 8-bit value of a particular PCD token.
If the TokenNumber is invalid or the token space
specified by Guid does not exist, the results are
unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size 8-bit value for the PCD token.
**/
UINT8
EFIAPI
PeiPcdGet8Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return *((UINT8 *) ExGetWorker (Guid, ExTokenNumber, sizeof (UINT8)));
}
/**
Retrieves an 16-bit value for a given PCD token.
Retrieves the 16-bit value of a particular PCD token.
If the TokenNumber is invalid or the token space
specified by Guid does not exist, the results are
unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size 16-bit value for the PCD token.
**/
UINT16
EFIAPI
PeiPcdGet16Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return ReadUnaligned16 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT16)));
}
/**
Retrieves an 32-bit value for a given PCD token.
Retrieves the 32-bit value of a particular PCD token.
If the TokenNumber is invalid or the token space
specified by Guid does not exist, the results are
unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size 32-bit value for the PCD token.
**/
UINT32
EFIAPI
PeiPcdGet32Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return ReadUnaligned32 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT32)));
}
/**
Retrieves an 64-bit value for a given PCD token.
Retrieves the 64-bit value of a particular PCD token.
If the TokenNumber is invalid or the token space
specified by Guid does not exist, the results are
unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size 64-bit value for the PCD token.
**/
UINT64
EFIAPI
PeiPcdGet64Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return ReadUnaligned64 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT64)));
}
/**
Retrieves a pointer to a value for a given PCD token.
Retrieves the current pointer to the buffer for a PCD token number.
Do not make any assumptions about the alignment of the pointer that
is returned by this function call. If the TokenNumber is invalid,
the results are unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The pointer to the buffer to be retrived.
**/
VOID *
EFIAPI
PeiPcdGetPtrEx (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return ExGetWorker (Guid, ExTokenNumber, 0);
}
/**
Retrieves an Boolean value for a given PCD token.
Retrieves the Boolean value of a particular PCD token.
If the TokenNumber is invalid or the token space
specified by Guid does not exist, the results are
unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size Boolean value for the PCD token.
**/
BOOLEAN
EFIAPI
PeiPcdGetBoolEx (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
return *((BOOLEAN *) ExGetWorker (Guid, ExTokenNumber, sizeof (BOOLEAN)));
}
/**
Retrieves the size of the value for a given PCD token.
Retrieves the current size of a particular PCD token.
If the TokenNumber is invalid, the results are unpredictable.
@param[in] Guid The token space for the token number.
@param[in] ExTokenNumber The PCD token number.
@return The size of the value for the PCD token.
**/
UINTN
EFIAPI
PeiPcdGetSizeEx (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber
)
{
if ((!FeaturePcdGet (PcdPeiPcdDatabaseGetSizeEnabled)) || !FeaturePcdGet (PcdPeiPcdDatabaseExEnabled)) {
return 0;
}
return PeiPcdGetSize (GetExPcdTokenNumber (Guid, ExTokenNumber));
}
/**
Sets an 8-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet8 (
IN UINTN TokenNumber,
IN UINT8 Value
)
{
return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}
/**
Sets an 16-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet16 (
IN UINTN TokenNumber,
IN UINT16 Value
)
{
return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}
/**
Sets an 32-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet32 (
IN UINTN TokenNumber,
IN UINT32 Value
)
{
return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}
/**
Sets an 64-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet64 (
IN UINTN TokenNumber,
IN UINT64 Value
)
{
return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}
/**
Sets a value of a specified size for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
On input, if the SizeOfValue is greater than the maximum size supported
for this TokenNumber then the output value of SizeOfValue will reflect
the maximum size supported for this TokenNumber.
@param[in] Buffer The buffer to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSetPtr (
IN UINTN TokenNumber,
IN OUT UINTN *SizeOfBuffer,
IN VOID *Buffer
)
{
return SetWorker (TokenNumber, Buffer, SizeOfBuffer, TRUE);
}
/**
Sets an Boolean value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] TokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSetBool (
IN UINTN TokenNumber,
IN BOOLEAN Value
)
{
return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}
/**
Sets an 8-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet8Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINT8 Value
)
{
return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}
/**
Sets an 16-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet16Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINT16 Value
)
{
return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}
/**
Sets an 32-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet32Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINT32 Value
)
{
return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}
/**
Sets an 64-bit value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSet64Ex (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN UINT64 Value
)
{
return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}
/**
Sets a value of a specified size for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.
On input, if the SizeOfValue is greater than the maximum size supported
for this TokenNumber then the output value of SizeOfValue will reflect
the maximum size supported for this TokenNumber.
@param[in] Value The buffer to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSetPtrEx (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN OUT UINTN *SizeOfBuffer,
IN VOID *Value
)
{
return ExSetWorker (ExTokenNumber, Guid, Value, SizeOfBuffer, TRUE);
}
/**
Sets an Boolean value for a given PCD token.
When the PCD service sets a value, it will check to ensure that the
size of the value being set is compatible with the Token's existing definition.
If it is not, an error will be returned.
@param [in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param [in] ExTokenNumber The PCD token number.
@param [in] Value The value to set for the PCD token.
@retval EFI_SUCCESS Procedure returned successfully.
@retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data
being set was incompatible with a call to this function.
Use GetSize() to retrieve the size of the target data.
@retval EFI_NOT_FOUND The PCD service could not find the requested token number.
**/
EFI_STATUS
EFIAPI
PeiPcdSetBoolEx (
IN CONST EFI_GUID *Guid,
IN UINTN ExTokenNumber,
IN BOOLEAN Value
)
{
return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}
/**
Specifies a function to be called anytime the value of a designated token is changed.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
@retval EFI_SUCCESS The PCD service has successfully established a call event
for the CallBackToken requested.
@retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
**/
EFI_STATUS
EFIAPI
PeiRegisterCallBackOnSet (
IN CONST EFI_GUID *Guid, OPTIONAL
IN UINTN ExTokenNumber,
IN PCD_PPI_CALLBACK CallBackFunction
)
{
if (!FeaturePcdGet(PcdPeiPcdDatabaseCallbackOnSetEnabled)) {
return EFI_UNSUPPORTED;
}
ASSERT (CallBackFunction != NULL);
return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, TRUE);
}
/**
Cancels a previously set callback function for a particular PCD token number.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in] ExTokenNumber The PCD token number.
@param[in] CallBackFunction The function prototype called when the value associated with the CallBackToken is set.
@retval EFI_SUCCESS The PCD service has successfully established a call event
for the CallBackToken requested.
@retval EFI_NOT_FOUND The PCD service could not find the referenced token number.
**/
EFI_STATUS
EFIAPI
PcdUnRegisterCallBackOnSet (
IN CONST EFI_GUID *Guid, OPTIONAL
IN UINTN ExTokenNumber,
IN PCD_PPI_CALLBACK CallBackFunction
)
{
if (!FeaturePcdGet(PcdPeiPcdDatabaseCallbackOnSetEnabled)) {
return EFI_UNSUPPORTED;
}
ASSERT (CallBackFunction != NULL);
return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, FALSE);
}
/**
Retrieves the next valid PCD token for a given namespace.
@param[in] Guid The 128-bit unique value that designates the namespace from which to extract the value.
@param[in, out] TokenNumber A pointer to the PCD token number to use to find the subsequent token number.
If the input token namespace or token number does not exist on the platform,
an error is returned and the value of *TokenNumber is undefined. To retrieve the "first" token,
have the pointer reference a TokenNumber value of 0. If the input token number is 0 and
there is no valid token number for this token namespace, *TokenNumber will be assigned to
0 and the function return EFI_SUCCESS. If the token number is the last valid token number,
*TokenNumber will be assigned to 0 and the function return EFI_SUCCESS.
@retval EFI_SUCCESS The PCD service retrieved the next valid token number. Or the input token number
is already the last valid token number in the PCD database.
In the later case, *TokenNumber is updated with the value of 0.
@retval EFI_NOT_FOUND If this input token number and token namespace does not exist on the platform.
**/
EFI_STATUS
EFIAPI
PeiPcdGetNextToken (
IN CONST EFI_GUID *Guid, OPTIONAL
IN OUT UINTN *TokenNumber
)
{
UINTN GuidTableIdx;
PEI_PCD_DATABASE *PeiPcdDb;
EFI_GUID *MatchGuid;
DYNAMICEX_MAPPING *ExMapTable;
UINTN Index;
BOOLEAN Found;
BOOLEAN PeiExMapTableEmpty;
if (!FeaturePcdGet (PcdPeiPcdDatabaseTraverseEnabled)) {
return EFI_UNSUPPORTED;
}
PeiExMapTableEmpty = PEI_EXMAP_TABLE_EMPTY;
if (Guid == NULL) {
if (*TokenNumber > PEI_NEX_TOKEN_NUMBER) {
return EFI_NOT_FOUND;
}
(*TokenNumber)++;
if (*TokenNumber > PEI_NEX_TOKEN_NUMBER) {
*TokenNumber = PCD_INVALID_TOKEN_NUMBER;
}
return EFI_SUCCESS;
} else {
if (PeiExMapTableEmpty) {
*TokenNumber = PCD_INVALID_TOKEN_NUMBER;
return EFI_SUCCESS;
}
//
// Assume PCD Database AutoGen tool is sorting the ExMap based on the following order
// 1) ExGuid
// 2) ExTokenNumber
//
PeiPcdDb = GetPcdDatabase ();
MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), Guid);
if (MatchGuid == NULL) {
*TokenNumber = PCD_INVALID_TOKEN_NUMBER;
return EFI_NOT_FOUND;
}
GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;
ExMapTable = PeiPcdDb->Init.ExMapTable;
Found = FALSE;
//
// Locate the GUID in ExMapTable first.
//
for (Index = 0; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {
if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
Found = TRUE;
break;
}
}
if (Found) {
if (*TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
*TokenNumber = ExMapTable[Index].ExTokenNumber;
return EFI_SUCCESS;
}
for ( ; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {
if (ExMapTable[Index].ExTokenNumber == *TokenNumber) {
Index++;
if (Index == PEI_EXMAPPING_TABLE_SIZE) {
//
// Exceed the length of ExMap Table
//
*TokenNumber = PCD_INVALID_TOKEN_NUMBER;
return EFI_SUCCESS;
}
if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
*TokenNumber = ExMapTable[Index].ExTokenNumber;
return EFI_SUCCESS;
} else {
*TokenNumber = PCD_INVALID_TOKEN_NUMBER;
return EFI_SUCCESS;
}
}
}
return EFI_NOT_FOUND;
}
}
return EFI_NOT_FOUND;
}
/**
Retrieves the next valid PCD token namespace for a given namespace.
@param[in, out] Guid An indirect pointer to EFI_GUID. On input it designates
a known token namespace from which the search will start. On output,
it designates the next valid token namespace on the platform. If the input
token namespace does not exist on the platform, an error is returned and
the value of *Guid is undefined. If *Guid is NULL, then the GUID of the
first token space of the current platform is assigned to *Guid the function
return EFI_SUCCESS. If *Guid is NULL and there is no namespace exist in
the platform other than the default (NULL) tokennamespace, *Guid is unchanged
and the function return EFI_SUCCESS. If this input token namespace is the last
namespace on the platform, *Guid will be assigned to NULL and the function return
EFI_SUCCESS.
@retval EFI_SUCCESS The PCD service retrieved the next valid token space Guid.
Or the input token space Guid is already the last valid token space Guid
in the PCD database. In the later case, *Guid is updated with the value of NULL.
@retval EFI_NOT_FOUND If the input token namespace does not exist on the platform.
**/
EFI_STATUS
EFIAPI
PeiPcdGetNextTokenSpace (
IN OUT CONST EFI_GUID **Guid
)
{
UINTN GuidTableIdx;
EFI_GUID *MatchGuid;
PEI_PCD_DATABASE *PeiPcdDb;
DYNAMICEX_MAPPING *ExMapTable;
UINTN Index;
BOOLEAN Found;
BOOLEAN PeiExMapTableEmpty;
if (!FeaturePcdGet (PcdPeiPcdDatabaseTraverseEnabled)) {
return EFI_UNSUPPORTED;
}
ASSERT (Guid != NULL);
PeiExMapTableEmpty = PEI_EXMAP_TABLE_EMPTY;
if (PeiExMapTableEmpty) {
if (*Guid != NULL) {
return EFI_NOT_FOUND;
} else {
return EFI_SUCCESS;
}
}
//
// Assume PCD Database AutoGen tool is sorting the ExMap based on the following order
// 1) ExGuid
// 2) ExTokenNumber
//
PeiPcdDb = GetPcdDatabase ();
ExMapTable = PeiPcdDb->Init.ExMapTable;
if (*Guid == NULL) {
//
// return the first Token Space Guid.
//
*Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[0].ExGuidIndex];
return EFI_SUCCESS;
}
MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), *Guid);
if (MatchGuid == NULL) {
return EFI_NOT_FOUND;
}
GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;
Found = FALSE;
for (Index = 0; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {
if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {
Found = TRUE;
break;
}
}
if (Found) {
Index++;
for ( ; Index < PEI_EXMAPPING_TABLE_SIZE; Index++ ) {
if (ExMapTable[Index].ExGuidIndex != GuidTableIdx ) {
*Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[Index].ExGuidIndex];
return EFI_SUCCESS;
}
}
*Guid = NULL;
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
/**
Get PCD value's size for POINTER type PCD.
The POINTER type PCD's value will be stored into a buffer in specificed size.
The max size of this PCD's value is described in PCD's definition in DEC file.
@param LocalTokenNumberTableIdx Index of PCD token number in PCD token table
@param MaxSize Maxmium size of PCD's value
@param Database Pcd database in PEI phase.
@return PCD value's size for POINTER type PCD.
**/
UINTN
GetPtrTypeSize (
IN UINTN LocalTokenNumberTableIdx,
OUT UINTN *MaxSize,
IN PEI_PCD_DATABASE *Database
)
{
INTN SizeTableIdx;
UINTN LocalTokenNumber;
SKU_ID *SkuIdTable;
SIZE_INFO *SizeTable;
UINTN Index;
SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);
LocalTokenNumber = Database->Init.LocalTokenNumberTable[LocalTokenNumberTableIdx];
ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
SizeTable = Database->Init.SizeTable;
*MaxSize = SizeTable[SizeTableIdx];
//
// SizeTable only contain record for PCD_DATUM_TYPE_POINTER type
// PCD entry.
//
if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) {
//
// We have only one entry for VPD enabled PCD entry:
// 1) MAX Size.
// We consider current size is equal to MAX size.
//
return *MaxSize;
} else {
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) {
//
// We have only two entry for Non-Sku enabled PCD entry:
// 1) MAX SIZE
// 2) Current Size
//
return SizeTable[SizeTableIdx + 1];
} else {
//
// We have these entry for SKU enabled PCD entry
// 1) MAX SIZE
// 2) Current Size for each SKU_ID (It is equal to MaxSku).
//
SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, Database);
for (Index = 0; Index < SkuIdTable[0]; Index++) {
if (SkuIdTable[1 + Index] == Database->Init.SystemSkuId) {
return SizeTable[SizeTableIdx + 1 + Index];
}
}
return SizeTable[SizeTableIdx + 1];
}
}
}
/**
Set PCD value's size for POINTER type PCD.
The POINTER type PCD's value will be stored into a buffer in specificed size.
The max size of this PCD's value is described in PCD's definition in DEC file.
@param LocalTokenNumberTableIdx Index of PCD token number in PCD token table
@param CurrentSize Maxmium size of PCD's value
@param Database Pcd database in PEI phase.
@retval TRUE Success to set PCD's value size, which is not exceed maxmium size
@retval FALSE Fail to set PCD's value size, which maybe exceed maxmium size
**/
BOOLEAN
SetPtrTypeSize (
IN UINTN LocalTokenNumberTableIdx,
IN OUT UINTN *CurrentSize,
IN PEI_PCD_DATABASE *Database
)
{
INTN SizeTableIdx;
UINTN LocalTokenNumber;
SKU_ID *SkuIdTable;
SIZE_INFO *SizeTable;
UINTN Index;
UINTN MaxSize;
SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);
LocalTokenNumber = Database->Init.LocalTokenNumberTable[LocalTokenNumberTableIdx];
ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);
SizeTable = Database->Init.SizeTable;
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;
}
if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) {
//
// 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;
} else {
//
// We have these entry for SKU enabled PCD entry
// 1) MAX SIZE
// 2) Current Size for each SKU_ID (It is equal to MaxSku).
//
SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, Database);
for (Index = 0; Index < SkuIdTable[0]; Index++) {
if (SkuIdTable[1 + Index] == Database->Init.SystemSkuId) {
SizeTable[SizeTableIdx + 1 + Index] = (SIZE_INFO) *CurrentSize;
return TRUE;
}
}
SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize;
return TRUE;
}
}
}
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