[mirror_edk2.git] / MdeModulePkg / Universal / PCD / Pei / Pcd.c

/** @file \r
  All Pcd Ppi services are implemented here.\r
  \r
Copyright (c) 2006 - 2008, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
**/\r
\r
#include "Service.h"\r
\r
PCD_PPI mPcdPpiInstance = {\r
  PeiPcdSetSku,\r
\r
  PeiPcdGet8,\r
  PeiPcdGet16,          \r
  PeiPcdGet32,          \r
  PeiPcdGet64,          \r
  PeiPcdGetPtr,         \r
  PeiPcdGetBool,     \r
  PeiPcdGetSize,\r
\r
  PeiPcdGet8Ex,\r
  PeiPcdGet16Ex,          \r
  PeiPcdGet32Ex,          \r
  PeiPcdGet64Ex,          \r
  PeiPcdGetPtrEx,         \r
  PeiPcdGetBoolEx,     \r
  PeiPcdGetSizeEx,\r
  \r
  PeiPcdSet8,\r
  PeiPcdSet16,          \r
  PeiPcdSet32,          \r
  PeiPcdSet64,          \r
  PeiPcdSetPtr,         \r
  PeiPcdSetBool,     \r
\r
  PeiPcdSet8Ex,\r
  PeiPcdSet16Ex,          \r
  PeiPcdSet32Ex,          \r
  PeiPcdSet64Ex,          \r
  PeiPcdSetPtrEx,         \r
  PeiPcdSetBoolEx,\r
\r
  PeiRegisterCallBackOnSet,\r
  PcdUnRegisterCallBackOnSet,\r
  PeiPcdGetNextToken,\r
  PeiPcdGetNextTokenSpace\r
};\r
\r
EFI_PEI_PPI_DESCRIPTOR  mPpiPCD = {\r
  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
  &gPcdPpiGuid,\r
  &mPcdPpiInstance\r
};\r
\r
/**\r
  Main entry for PCD PEIM driver.\r
  \r
  This routine initialize the PCD database for PEI phase and install PCD_PPI.\r
\r
  @param  FileHandle  Handle of the file being invoked.\r
  @param  PeiServices Describes the list of possible PEI Services.\r
\r
  @return Status of install PCD_PPI\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PcdPeimInit (\r
  IN       EFI_PEI_FILE_HANDLE  FileHandle,\r
  IN CONST EFI_PEI_SERVICES     **PeiServices\r
  )\r
{\r
  BuildPcdDatabase ();\r
\r
  return PeiServicesInstallPpi (&mPpiPCD);\r
}\r
\r
/**\r
  Sets the SKU value for subsequent calls to set or get PCD token values.\r
\r
  SetSku() sets the SKU Id to be used for subsequent calls to set or get PCD values. \r
  SetSku() is normally called only once by the system.\r
\r
  For each item (token), the database can hold a single value that applies to all SKUs, \r
  or multiple values, where each value is associated with a specific SKU Id. Items with multiple, \r
  SKU-specific values are called SKU enabled. \r
  \r
  The SKU Id of zero is reserved as a default. The valid SkuId range is 1 to 255.  \r
  For tokens that are not SKU enabled, the system ignores any set SKU Id and works with the \r
  single value for that token. For SKU-enabled tokens, the system will use the SKU Id set by the \r
  last call to SetSku(). If no SKU Id is set or the currently set SKU Id isn't valid for the specified token, \r
  the system uses the default SKU Id. If the system attempts to use the default SKU Id and no value has been \r
  set for that Id, the results are unpredictable.\r
\r
  @param[in]  SkuId The SKU value that will be used when the PCD service will retrieve and \r
              set values associated with a PCD token.\r
\r
**/\r
VOID\r
EFIAPI\r
PeiPcdSetSku (\r
  IN  UINTN                  SkuId\r
  )\r
{\r
\r
  GetPcdDatabase()->Init.SystemSkuId = (SKU_ID) SkuId;\r
\r
  return;\r
}\r
\r
/**\r
  Retrieves an 8-bit value for a given PCD token.\r
\r
  Retrieves the current byte-sized value for a PCD token number.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
  \r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The UINT8 value.\r
  \r
**/\r
UINT8\r
EFIAPI\r
PeiPcdGet8 (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return *((UINT8 *) GetWorker (TokenNumber, sizeof (UINT8)));\r
}\r
\r
/**\r
  Retrieves an 16-bit value for a given PCD token.\r
\r
  Retrieves the current 16-bits value for a PCD token number.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
  \r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The UINT16 value.\r
  \r
**/\r
UINT16\r
EFIAPI\r
PeiPcdGet16 (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return ReadUnaligned16 (GetWorker (TokenNumber, sizeof (UINT16)));\r
}\r
\r
/**\r
  Retrieves an 32-bit value for a given PCD token.\r
\r
  Retrieves the current 32-bits value for a PCD token number.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
  \r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The UINT32 value.\r
  \r
**/\r
UINT32\r
EFIAPI\r
PeiPcdGet32 (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return ReadUnaligned32 (GetWorker (TokenNumber, sizeof (UINT32)));\r
}\r
\r
/**\r
  Retrieves an 64-bit value for a given PCD token.\r
\r
  Retrieves the current 64-bits value for a PCD token number.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
  \r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The UINT64 value.\r
  \r
**/\r
UINT64\r
EFIAPI\r
PeiPcdGet64 (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return ReadUnaligned64 (GetWorker (TokenNumber, sizeof (UINT64)));\r
}\r
\r
/**\r
  Retrieves a pointer to a value for a given PCD token.\r
\r
  Retrieves the current pointer to the buffer for a PCD token number.  \r
  Do not make any assumptions about the alignment of the pointer that \r
  is returned by this function call.  If the TokenNumber is invalid, \r
  the results are unpredictable.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The pointer to the buffer to be retrieved.\r
  \r
**/\r
VOID *\r
EFIAPI\r
PeiPcdGetPtr (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return GetWorker (TokenNumber, 0);\r
}\r
\r
/**\r
  Retrieves a Boolean value for a given PCD token.\r
\r
  Retrieves the current boolean value for a PCD token number.  \r
  Do not make any assumptions about the alignment of the pointer that \r
  is returned by this function call.  If the TokenNumber is invalid, \r
  the results are unpredictable.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The Boolean value.\r
  \r
**/\r
BOOLEAN\r
EFIAPI\r
PeiPcdGetBool (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  return *((BOOLEAN *) GetWorker (TokenNumber, sizeof (BOOLEAN)));\r
}\r
\r
/**\r
  Retrieves the size of the value for a given PCD token.\r
\r
  Retrieves the current size of a particular PCD token.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
\r
  @return The size of the value for the PCD token.\r
  \r
**/\r
UINTN\r
EFIAPI\r
PeiPcdGetSize (\r
  IN UINTN                    TokenNumber\r
  )\r
{\r
  PEI_PCD_DATABASE    *PeiPcdDb;\r
  UINTN               Size;\r
  UINTN               MaxSize;\r
\r
  PeiPcdDb = GetPcdDatabase ();\r
  //\r
  // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.\r
  // We have to decrement TokenNumber by 1 to make it usable\r
  // as the array index.\r
  //\r
  TokenNumber--;\r
\r
  // EBC compiler is very choosy. It may report warning about comparison\r
  // between UINTN and 0 . So we add 1 in each size of the \r
  // comparison.\r
  ASSERT (TokenNumber + 1 < PEI_LOCAL_TOKEN_NUMBER + 1);\r
\r
  Size = (PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber] & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT;\r
\r
  if (Size == 0) {\r
    //\r
    // For pointer type, we need to scan the SIZE_TABLE to get the current size.\r
    //\r
    return GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);\r
  } else {\r
    return Size;\r
  }\r
\r
}\r
\r
/**\r
  Retrieves an 8-bit value for a given PCD token.\r
\r
  Retrieves the 8-bit value of a particular PCD token.  \r
  If the TokenNumber is invalid or the token space\r
  specified by Guid does not exist, the results are \r
  unpredictable.\r
\r
  @param[in]  Guid              The token space for the token number.\r
  @param[in]  ExTokenNumber     The PCD token number. \r
\r
  @return The size 8-bit value for the PCD token.\r
  \r
**/\r
UINT8\r
EFIAPI\r
PeiPcdGet8Ex (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber\r
  )\r
{\r
  return *((UINT8 *) ExGetWorker (Guid, ExTokenNumber, sizeof (UINT8)));\r
}\r
\r
/**\r
  Retrieves an 16-bit value for a given PCD token.\r
\r
  Retrieves the 16-bit value of a particular PCD token.  \r
  If the TokenNumber is invalid or the token space\r
  specified by Guid does not exist, the results are \r
  unpredictable.\r
\r
  @param[in]  Guid          The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The size 16-bit value for the PCD token.\r
  \r
**/\r
UINT16\r
EFIAPI\r
PeiPcdGet16Ex (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber\r
  )\r
{\r
  return ReadUnaligned16 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT16)));\r
}\r
\r
/**\r
  Retrieves an 32-bit value for a given PCD token.\r
\r
  Retrieves the 32-bit value of a particular PCD token.  \r
  If the TokenNumber is invalid or the token space\r
  specified by Guid does not exist, the results are \r
  unpredictable.\r
\r
  @param[in]  Guid The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The size 32-bit value for the PCD token.\r
  \r
**/\r
UINT32\r
EFIAPI\r
PeiPcdGet32Ex (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber\r
  )\r
{\r
  return ReadUnaligned32 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT32)));\r
}\r
\r
/**\r
  Retrieves an 64-bit value for a given PCD token.\r
\r
  Retrieves the 64-bit value of a particular PCD token.  \r
  If the TokenNumber is invalid or the token space\r
  specified by Guid does not exist, the results are \r
  unpredictable.\r
\r
  @param[in]  Guid The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The size 64-bit value for the PCD token.\r
  \r
**/\r
UINT64\r
EFIAPI\r
PeiPcdGet64Ex (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber\r
  )\r
{\r
  return ReadUnaligned64 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT64)));\r
}\r
\r
/**\r
  Retrieves a pointer to a value for a given PCD token.\r
\r
  Retrieves the current pointer to the buffer for a PCD token number.  \r
  Do not make any assumptions about the alignment of the pointer that \r
  is returned by this function call.  If the TokenNumber is invalid, \r
  the results are unpredictable.\r
\r
  @param[in]  Guid          The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The pointer to the buffer to be retrieved.\r
  \r
**/\r
VOID *\r
EFIAPI\r
PeiPcdGetPtrEx (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber\r
  )\r
{\r
  return ExGetWorker (Guid, ExTokenNumber, 0);\r
}\r
\r
/**\r
  Retrieves an Boolean value for a given PCD token.\r
\r
  Retrieves the Boolean value of a particular PCD token.  \r
  If the TokenNumber is invalid or the token space\r
  specified by Guid does not exist, the results are \r
  unpredictable.\r
\r
  @param[in]  Guid          The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The size Boolean value for the PCD token.\r
  \r
**/\r
BOOLEAN\r
EFIAPI\r
PeiPcdGetBoolEx (\r
  IN CONST  EFI_GUID              *Guid,\r
  IN UINTN                        ExTokenNumber\r
  )\r
{\r
  return *((BOOLEAN *) ExGetWorker (Guid, ExTokenNumber, sizeof (BOOLEAN)));\r
}\r
\r
/**\r
  Retrieves the size of the value for a given PCD token.\r
\r
  Retrieves the current size of a particular PCD token.  \r
  If the TokenNumber is invalid, the results are unpredictable.\r
\r
  @param[in]  Guid          The token space for the token number.\r
  @param[in]  ExTokenNumber The PCD token number. \r
\r
  @return The size of the value for the PCD token.\r
  \r
**/\r
UINTN\r
EFIAPI\r
PeiPcdGetSizeEx (\r
  IN CONST  EFI_GUID              *Guid,\r
  IN UINTN                        ExTokenNumber\r
  )\r
{\r
  return PeiPcdGetSize (GetExPcdTokenNumber (Guid, ExTokenNumber));\r
}\r
\r
/**\r
  Sets an 8-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet8 (\r
  IN UINTN                        TokenNumber,\r
  IN UINT8                        Value\r
  )\r
{\r
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 16-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet16 (\r
  IN UINTN                         TokenNumber,\r
  IN UINT16                        Value\r
  )\r
{\r
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 32-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet32 (\r
  IN UINTN                         TokenNumber,\r
  IN UINT32                        Value\r
  )\r
{\r
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 64-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet64 (\r
  IN UINTN                         TokenNumber,\r
  IN UINT64                        Value\r
  )\r
{\r
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets a value of a specified size for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in, out] SizeOfBuffer A pointer to the length of the value being set for the PCD token.  \r
                              On input, if the SizeOfValue is greater than the maximum size supported \r
                              for this TokenNumber then the output value of SizeOfValue will reflect \r
                              the maximum size supported for this TokenNumber.\r
  @param[in]  Buffer The buffer to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSetPtr (\r
  IN      UINTN                    TokenNumber,\r
  IN OUT  UINTN                    *SizeOfBuffer,\r
  IN      VOID                     *Buffer\r
  )\r
{\r
  return SetWorker (TokenNumber, Buffer, SizeOfBuffer, TRUE);\r
}\r
\r
/**\r
  Sets an Boolean value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSetBool (\r
  IN UINTN                         TokenNumber,\r
  IN BOOLEAN                       Value\r
  )\r
{\r
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 8-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  Guid          The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  Value         The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet8Ex (\r
  IN CONST EFI_GUID               *Guid,\r
  IN UINTN                        ExTokenNumber,\r
  IN UINT8                        Value\r
  )\r
{\r
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 16-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  Value The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet16Ex (\r
  IN CONST EFI_GUID               *Guid,\r
  IN UINTN                        ExTokenNumber,\r
  IN UINT16                       Value\r
  )\r
{\r
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 32-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  Guid          The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  Value         The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet32Ex (\r
  IN CONST EFI_GUID               *Guid,\r
  IN UINTN                        ExTokenNumber,\r
  IN UINT32                       Value\r
  )\r
{\r
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets an 64-bit value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]  Guid          The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  Value         The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSet64Ex (\r
  IN CONST EFI_GUID               *Guid,\r
  IN UINTN                        ExTokenNumber,\r
  IN UINT64                       Value\r
  )\r
{\r
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Sets a value of a specified size for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param[in]        Guid            The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]        ExTokenNumber   The PCD token number. \r
  @param[in, out]   SizeOfBuffer    A pointer to the length of the value being set for the PCD token.  \r
                                    On input, if the SizeOfValue is greater than the maximum size supported \r
                                    for this TokenNumber then the output value of SizeOfValue will reflect \r
                                    the maximum size supported for this TokenNumber.\r
  @param[in]        Value           The buffer to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSetPtrEx (\r
  IN     CONST EFI_GUID               *Guid,\r
  IN     UINTN                        ExTokenNumber,\r
  IN OUT UINTN                        *SizeOfBuffer,\r
  IN     VOID                         *Value\r
  )\r
{\r
  return ExSetWorker (ExTokenNumber, Guid, Value, SizeOfBuffer, TRUE);\r
}\r
\r
/**\r
  Sets an Boolean value for a given PCD token.\r
\r
  When the PCD service sets a value, it will check to ensure that the \r
  size of the value being set is compatible with the Token's existing definition.  \r
  If it is not, an error will be returned.\r
\r
  @param [in]  Guid          The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param [in]  ExTokenNumber The PCD token number. \r
  @param [in]  Value         The value to set for the PCD token.\r
\r
  @retval EFI_SUCCESS  Procedure returned successfully.\r
  @retval EFI_INVALID_PARAMETER The PCD service determined that the size of the data \r
                                  being set was incompatible with a call to this function.  \r
                                  Use GetSize() to retrieve the size of the target data.\r
  @retval EFI_NOT_FOUND The PCD service could not find the requested token number.\r
  \r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdSetBoolEx (\r
  IN CONST EFI_GUID             *Guid,\r
  IN UINTN                      ExTokenNumber,\r
  IN BOOLEAN                    Value\r
  )\r
{\r
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));\r
}\r
\r
/**\r
  Specifies a function to be called anytime the value of a designated token is changed.\r
\r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  CallBackFunction The function prototype called when the value associated with the CallBackToken is set.  \r
\r
  @retval EFI_SUCCESS  The PCD service has successfully established a call event \r
                        for the CallBackToken requested.\r
  @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiRegisterCallBackOnSet (\r
  IN  CONST EFI_GUID              *Guid, OPTIONAL\r
  IN  UINTN                       ExTokenNumber,\r
  IN  PCD_PPI_CALLBACK            CallBackFunction\r
  )\r
{\r
  if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (CallBackFunction == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, TRUE);\r
}\r
\r
/**\r
  Cancels a previously set callback function for a particular PCD token number.\r
\r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in]  ExTokenNumber The PCD token number. \r
  @param[in]  CallBackFunction The function prototype called when the value associated with the CallBackToken is set.  \r
\r
  @retval EFI_SUCCESS  The PCD service has successfully established a call event \r
                        for the CallBackToken requested.\r
  @retval EFI_NOT_FOUND The PCD service could not find the referenced token number.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PcdUnRegisterCallBackOnSet (\r
  IN  CONST EFI_GUID              *Guid, OPTIONAL\r
  IN  UINTN                       ExTokenNumber,\r
  IN  PCD_PPI_CALLBACK            CallBackFunction\r
  )\r
{\r
  if (!FeaturePcdGet(PcdPeiFullPcdDatabaseEnable)) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (CallBackFunction == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, FALSE);\r
}\r
\r
/**\r
  Retrieves the next valid token number in a given namespace.  \r
  \r
  This is useful since the PCD infrastructure contains a sparse list of token numbers, \r
  and one cannot a priori know what token numbers are valid in the database. \r
  \r
  If TokenNumber is 0 and Guid is not NULL, then the first token from the token space specified by Guid is returned.  \r
  If TokenNumber is not 0 and Guid is not NULL, then the next token in the token space specified by Guid is returned.  \r
  If TokenNumber is 0 and Guid is NULL, then the first token in the default token space is returned.  \r
  If TokenNumber is not 0 and Guid is NULL, then the next token in the default token space is returned.  \r
  The token numbers in the default token space may not be related to token numbers in token spaces that are named by Guid.  \r
  If the next token number can be retrieved, then it is returned in TokenNumber, and EFI_SUCCESS is returned.  \r
  If TokenNumber represents the last token number in the token space specified by Guid, then EFI_NOT_FOUND is returned.  \r
  If TokenNumber is not present in the token space specified by Guid, then EFI_NOT_FOUND is returned.\r
\r
\r
  @param[in]       Guid        The 128-bit unique value that designates the namespace from which to extract the value.  \r
                               This is an optional parameter that may be NULL.  If this parameter is NULL, then a request \r
                               is being made to retrieve tokens from the default token space.\r
  @param[in, out]  TokenNumber A pointer to the PCD token number to use to find the subsequent token number.\r
                   \r
  @retval EFI_SUCCESS   The PCD service has retrieved the next valid token number. \r
                        Or the input token number is already the last valid token number in the PCD database. \r
                        In the later case, *TokenNumber is updated with the value of 0.\r
  @retval EFI_NOT_FOUND If this input token number and token namespace does not exist on the platform.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdGetNextToken (\r
  IN CONST EFI_GUID               *Guid, OPTIONAL\r
  IN OUT  UINTN                   *TokenNumber\r
  )\r
{\r
  UINTN               GuidTableIdx;\r
  PEI_PCD_DATABASE    *PeiPcdDb;\r
  EFI_GUID            *MatchGuid;\r
  DYNAMICEX_MAPPING   *ExMapTable;\r
  UINTN               Index;\r
  BOOLEAN             Found;\r
  BOOLEAN             PeiExMapTableEmpty;\r
\r
  if (!FeaturePcdGet (PcdPeiFullPcdDatabaseEnable)) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  PeiExMapTableEmpty = PEI_EXMAP_TABLE_EMPTY;\r
\r
  if (Guid == NULL) {\r
    if (*TokenNumber > PEI_NEX_TOKEN_NUMBER) {\r
      return EFI_NOT_FOUND;\r
    }\r
    (*TokenNumber)++;\r
    if (*TokenNumber > PEI_NEX_TOKEN_NUMBER) {\r
      *TokenNumber = PCD_INVALID_TOKEN_NUMBER;\r
    }\r
    return EFI_SUCCESS;\r
  } else {\r
    if (PeiExMapTableEmpty) {\r
      *TokenNumber = PCD_INVALID_TOKEN_NUMBER;\r
      return EFI_SUCCESS;\r
    }\r
    \r
    //\r
    // Assume PCD Database AutoGen tool is sorting the ExMap based on the following order\r
    // 1) ExGuid\r
    // 2) ExTokenNumber\r
    //\r
    PeiPcdDb = GetPcdDatabase ();\r
    \r
    MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), Guid);\r
\r
    if (MatchGuid == NULL) {\r
      *TokenNumber = PCD_INVALID_TOKEN_NUMBER;\r
      return EFI_NOT_FOUND;\r
    }\r
\r
    GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;\r
\r
    ExMapTable = PeiPcdDb->Init.ExMapTable;\r
\r
    Found = FALSE;\r
    //\r
    // Locate the GUID in ExMapTable first.\r
    //\r
    for (Index = 0; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {\r
      if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {\r
        Found = TRUE;\r
        break;\r
      }\r
    }\r
\r
    if (Found) {\r
      if (*TokenNumber == PCD_INVALID_TOKEN_NUMBER) {\r
        *TokenNumber = ExMapTable[Index].ExTokenNumber;\r
         return EFI_SUCCESS;\r
      }\r
\r
      for ( ; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {\r
        if (ExMapTable[Index].ExTokenNumber == *TokenNumber) {\r
          Index++;\r
          if (Index == PEI_EXMAPPING_TABLE_SIZE) {\r
            //\r
            // Exceed the length of ExMap Table\r
            //\r
            *TokenNumber = PCD_INVALID_TOKEN_NUMBER;\r
            return EFI_SUCCESS;\r
          }\r
          if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {\r
            *TokenNumber = ExMapTable[Index].ExTokenNumber;\r
            return EFI_SUCCESS;\r
          } else {\r
            *TokenNumber = PCD_INVALID_TOKEN_NUMBER;\r
            return EFI_SUCCESS;\r
          }\r
        }\r
      }\r
      return EFI_NOT_FOUND;\r
    }\r
  }\r
\r
  return EFI_NOT_FOUND;\r
}\r
\r
/**\r
  Retrieves the next valid PCD token namespace for a given namespace.\r
\r
  @param[in, out]  Guid An indirect pointer to EFI_GUID.  On input it designates \r
                    a known token namespace from which the search will start. On output, \r
                    it designates the next valid token namespace on the platform. If the input \r
                    token namespace does not exist on the platform, an error is returned and \r
                    the value of *Guid is undefined. If *Guid is NULL, then the GUID of the \r
                    first token space of the current platform is assigned to *Guid the function \r
                    return EFI_SUCCESS. If  *Guid is NULL  and there is no namespace exist in \r
                    the platform other than the default (NULL) tokennamespace, *Guid is unchanged \r
                    and the function return EFI_SUCCESS. If this input token namespace is the last \r
                    namespace on the platform, *Guid will be assigned to NULL and the function return \r
                    EFI_SUCCESS. \r
\r
  @retval EFI_SUCCESS  The PCD service retrieved the next valid token space Guid. \r
                        Or the input token space Guid is already the last valid token space Guid \r
                        in the PCD database. In the later case, *Guid is updated with the value of NULL.\r
  @retval EFI_NOT_FOUND If the input token namespace does not exist on the platform.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiPcdGetNextTokenSpace (\r
  IN OUT CONST EFI_GUID          **Guid\r
  )\r
{\r
  UINTN               GuidTableIdx;\r
  EFI_GUID            *MatchGuid;\r
  PEI_PCD_DATABASE    *PeiPcdDb;\r
  DYNAMICEX_MAPPING   *ExMapTable;\r
  UINTN               Index;\r
  BOOLEAN             Found;\r
  BOOLEAN             PeiExMapTableEmpty;\r
\r
  if (!FeaturePcdGet (PcdPeiFullPcdDatabaseEnable)) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  ASSERT (Guid != NULL);\r
\r
  PeiExMapTableEmpty = PEI_EXMAP_TABLE_EMPTY;\r
\r
  if (PeiExMapTableEmpty) {\r
    if (*Guid != NULL) {\r
      return EFI_NOT_FOUND;\r
    } else {\r
      return EFI_SUCCESS;\r
    }\r
  }\r
\r
  //\r
  // Assume PCD Database AutoGen tool is sorting the ExMap based on the following order\r
  // 1) ExGuid\r
  // 2) ExTokenNumber\r
  //\r
  PeiPcdDb = GetPcdDatabase ();\r
\r
  ExMapTable = PeiPcdDb->Init.ExMapTable;\r
\r
  if (*Guid == NULL) {\r
    //\r
    // return the first Token Space Guid.\r
    //\r
    *Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[0].ExGuidIndex];\r
    return EFI_SUCCESS;\r
  }\r
\r
  MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), *Guid);\r
\r
  if (MatchGuid == NULL) {\r
    return EFI_NOT_FOUND;\r
  }\r
  \r
  GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;\r
\r
  Found = FALSE;\r
  for (Index = 0; Index < PEI_EXMAPPING_TABLE_SIZE; Index++) {\r
    if (ExMapTable[Index].ExGuidIndex == GuidTableIdx) {\r
      Found = TRUE;\r
      break;\r
    }\r
  }\r
\r
  if (Found) {\r
    Index++;\r
    for ( ; Index < PEI_EXMAPPING_TABLE_SIZE; Index++ ) {\r
      if (ExMapTable[Index].ExGuidIndex != GuidTableIdx ) {\r
        *Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[Index].ExGuidIndex];\r
        return EFI_SUCCESS;\r
      }\r
    }\r
    *Guid = NULL;\r
    return EFI_SUCCESS;\r
  }\r
\r
  return EFI_NOT_FOUND;\r
\r
}\r
\r
/**\r
  Get PCD value's size for POINTER type PCD.\r
  \r
  The POINTER type PCD's value will be stored into a buffer in specificed size.\r
  The max size of this PCD's value is described in PCD's definition in DEC file.\r
\r
  @param LocalTokenNumberTableIdx Index of PCD token number in PCD token table\r
  @param MaxSize                  Maximum size of PCD's value\r
  @param Database                 Pcd database in PEI phase.\r
\r
  @return PCD value's size for POINTER type PCD.\r
\r
**/\r
UINTN\r
GetPtrTypeSize (\r
  IN    UINTN             LocalTokenNumberTableIdx,\r
  OUT   UINTN             *MaxSize,\r
  IN    PEI_PCD_DATABASE  *Database\r
  )\r
{\r
  INTN        SizeTableIdx;\r
  UINTN       LocalTokenNumber;\r
  SKU_ID      *SkuIdTable;\r
  SIZE_INFO   *SizeTable;\r
  UINTN       Index;\r
\r
  SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);\r
\r
  LocalTokenNumber = Database->Init.LocalTokenNumberTable[LocalTokenNumberTableIdx];\r
\r
  ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);\r
  \r
  SizeTable = Database->Init.SizeTable;\r
\r
  *MaxSize = SizeTable[SizeTableIdx];\r
  //\r
  // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type \r
  // PCD entry.\r
  //\r
  if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) {\r
      //\r
      // We have only one entry for VPD enabled PCD entry:\r
      // 1) MAX Size.\r
      // We consider current size is equal to MAX size.\r
      //\r
      return *MaxSize;\r
  } else {\r
    if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) {\r
      //\r
      // We have only two entry for Non-Sku enabled PCD entry:\r
      // 1) MAX SIZE\r
      // 2) Current Size\r
      //\r
      return SizeTable[SizeTableIdx + 1];\r
    } else {\r
      //\r
      // We have these entry for SKU enabled PCD entry\r
      // 1) MAX SIZE\r
      // 2) Current Size for each SKU_ID (It is equal to MaxSku).\r
      //\r
      SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, Database);\r
      for (Index = 0; Index < SkuIdTable[0]; Index++) {\r
        if (SkuIdTable[1 + Index] == Database->Init.SystemSkuId) {\r
          return SizeTable[SizeTableIdx + 1 + Index];\r
        }\r
      }\r
      return SizeTable[SizeTableIdx + 1];\r
    }\r
  }\r
}\r
\r
/**\r
  Set PCD value's size for POINTER type PCD.\r
  \r
  The POINTER type PCD's value will be stored into a buffer in specificed size.\r
  The max size of this PCD's value is described in PCD's definition in DEC file.\r
\r
  @param LocalTokenNumberTableIdx Index of PCD token number in PCD token table\r
  @param CurrentSize              Maximum size of PCD's value\r
  @param Database                 Pcd database in PEI phase.\r
\r
  @retval TRUE  Success to set PCD's value size, which is not exceed maximum size\r
  @retval FALSE Fail to set PCD's value size, which maybe exceed maximum size\r
\r
**/\r
BOOLEAN\r
SetPtrTypeSize (\r
  IN          UINTN             LocalTokenNumberTableIdx,\r
  IN    OUT   UINTN             *CurrentSize,\r
  IN          PEI_PCD_DATABASE  *Database\r
  )\r
{\r
  INTN        SizeTableIdx;\r
  UINTN       LocalTokenNumber;\r
  SKU_ID      *SkuIdTable;\r
  SIZE_INFO   *SizeTable;\r
  UINTN       Index;\r
  UINTN       MaxSize;\r
  \r
  SizeTableIdx = GetSizeTableIndex (LocalTokenNumberTableIdx, Database);\r
\r
  LocalTokenNumber = Database->Init.LocalTokenNumberTable[LocalTokenNumberTableIdx];\r
\r
  ASSERT ((LocalTokenNumber & PCD_DATUM_TYPE_ALL_SET) == PCD_DATUM_TYPE_POINTER);\r
  \r
  SizeTable = Database->Init.SizeTable;\r
\r
  MaxSize = SizeTable[SizeTableIdx];\r
  //\r
  // SizeTable only contain record for PCD_DATUM_TYPE_POINTER type \r
  // PCD entry.\r
  //\r
  if ((LocalTokenNumber & PCD_TYPE_VPD) != 0) {\r
      //\r
      // We shouldn't come here as we don't support SET for VPD\r
      //\r
      ASSERT (FALSE);\r
      return FALSE;\r
  } else {\r
    if ((*CurrentSize > MaxSize) ||\r
      (*CurrentSize == MAX_ADDRESS)) {\r
       *CurrentSize = MaxSize;\r
       return FALSE;\r
    }\r
    \r
    if ((LocalTokenNumber & PCD_TYPE_SKU_ENABLED) == 0) {\r
      //\r
      // We have only two entry for Non-Sku enabled PCD entry:\r
      // 1) MAX SIZE\r
      // 2) Current Size\r
      //\r
      SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize;\r
      return TRUE;\r
    } else {\r
      //\r
      // We have these entry for SKU enabled PCD entry\r
      // 1) MAX SIZE\r
      // 2) Current Size for each SKU_ID (It is equal to MaxSku).\r
      //\r
      SkuIdTable = GetSkuIdArray (LocalTokenNumberTableIdx, Database);\r
      for (Index = 0; Index < SkuIdTable[0]; Index++) {\r
        if (SkuIdTable[1 + Index] == Database->Init.SystemSkuId) {\r
          SizeTable[SizeTableIdx + 1 + Index] = (SIZE_INFO) *CurrentSize;\r
          return TRUE;\r
        }\r
      }\r
      SizeTable[SizeTableIdx + 1] = (SIZE_INFO) *CurrentSize;\r
      return TRUE;\r
    }\r
  }\r
\r
}\r