[mirror_edk2.git] / MdePkg / Include / Ppi / Pcd.h

/** @file\r
  Platform Configuration Database (PCD) Protocol\r
\r
  Copyright (c) 2006, 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
  Module Name:  Pcd.h\r
\r
**/\r
\r
#ifndef __PCD_H__\r
#define __PCD_H__\r
\r
extern EFI_GUID gPcdPpiGuid;\r
\r
#define PCD_PPI_GUID \\r
  { 0x6e81c58, 0x4ad7, 0x44bc, { 0x83, 0x90, 0xf1, 0x2, 0x65, 0xf7, 0x24, 0x80 } }\r
\r
#define PCD_INVALID_TOKEN_NUMBER ((UINTN) 0)\r
\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
  @retval VOID\r
\r
**/\r
typedef \r
VOID\r
(EFIAPI *PCD_PPI_SET_SKU) (\r
  IN  UINTN          SkuId\r
  );\r
\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
typedef\r
UINT8\r
(EFIAPI *PCD_PPI_GET8) (\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
UINT16\r
(EFIAPI *PCD_PPI_GET16) (\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
UINT32\r
(EFIAPI *PCD_PPI_GET32) (\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
UINT64\r
(EFIAPI *PCD_PPI_GET64) (\r
  IN UINTN             TokenNumber\r
  );\r
\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 retrived.\r
  \r
**/\r
typedef\r
VOID *\r
(EFIAPI *PCD_PPI_GET_POINTER) (\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
BOOLEAN\r
(EFIAPI *PCD_PPI_GET_BOOLEAN) (\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
UINTN\r
(EFIAPI *PCD_PPI_GET_SIZE) (\r
  IN UINTN             TokenNumber\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]  TokenNumber The PCD token number. \r
\r
  @return The size 8-bit value for the PCD token.\r
  \r
**/\r
typedef\r
UINT8\r
(EFIAPI *PCD_PPI_GET_EX_8) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The size 16-bit value for the PCD token.\r
  \r
**/\r
typedef\r
UINT16\r
(EFIAPI *PCD_PPI_GET_EX_16) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN              TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The size 32-bit value for the PCD token.\r
  \r
**/\r
typedef\r
UINT32\r
(EFIAPI *PCD_PPI_GET_EX_32) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The size 64-bit value for the PCD token.\r
  \r
**/\r
typedef\r
UINT64\r
(EFIAPI *PCD_PPI_GET_EX_64) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The pointer to the buffer to be retrived.\r
  \r
**/\r
typedef\r
VOID *\r
(EFIAPI *PCD_PPI_GET_EX_POINTER) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The size Boolean value for the PCD token.\r
  \r
**/\r
typedef\r
BOOLEAN\r
(EFIAPI *PCD_PPI_GET_EX_BOOLEAN) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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]  TokenNumber The PCD token number. \r
\r
  @return The size of the value for the PCD token.\r
  \r
**/\r
typedef\r
UINTN\r
(EFIAPI *PCD_PPI_GET_EX_SIZE) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber\r
  );\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET8) (\r
  IN UINTN             TokenNumber,\r
  IN UINT8             Value\r
  );\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET16) (\r
  IN UINTN              TokenNumber,\r
  IN UINT16             Value\r
  );\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET32) (\r
  IN UINTN             TokenNumber,\r
  IN UINT32            Value\r
  );\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET64) (\r
  IN UINTN             TokenNumber,\r
  IN UINT64            Value\r
  );\r
\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_POINTER) (\r
  IN        UINTN             TokenNumber,\r
  IN OUT    UINTN             *SizeOfBuffer,\r
  IN        VOID              *Buffer\r
  );\r
\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_BOOLEAN) (\r
  IN UINTN             TokenNumber,\r
  IN BOOLEAN           Value\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_8) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber,\r
  IN UINT8             Value\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_16) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber,\r
  IN UINT16            Value\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_32) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber,\r
  IN UINT32            Value\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_64) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber,\r
  IN UINT64            Value\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_POINTER) (\r
  IN        CONST EFI_GUID    *Guid,\r
  IN        UINTN             TokenNumber,\r
  IN OUT    UINTN             *SizeOfBuffer,\r
  IN        VOID              *Buffer\r
  );\r
\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]  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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_SET_EX_BOOLEAN) (\r
  IN CONST EFI_GUID    *Guid,\r
  IN UINTN             TokenNumber,\r
  IN BOOLEAN           Value\r
  );\r
\r
\r
\r
/**\r
  Callback on SET function prototype definition.\r
\r
  This notification function serves two purposes. Firstly, it notifies the module \r
  which did the registration that the value of this PCD token has been set. Secondly, \r
  it provides a mechanism for the module which did the registration to intercept the set \r
  operation and override the value been set if necessary. After the invocation of the \r
  callback function, TokenData will be used by PCD service PEIM to modify the internal data \r
  in PCD database.\r
\r
  @param[in]  CallBackGuid The PCD token GUID being set.\r
  @param[in]  CallBackToken The PCD token number being set.\r
  @param[in, out]  TokenData A pointer to the token data being set.\r
  @param[in]  TokenDataSize The size, in bytes, of the data being set.\r
\r
  @retval VOID\r
\r
**/\r
typedef\r
VOID\r
(EFIAPI *PCD_PPI_CALLBACK) (\r
  IN      CONST EFI_GUID   *CallBackGuid, OPTIONAL\r
  IN      UINTN            CallBackToken,\r
  IN  OUT VOID             *TokenData,\r
  IN      UINTN            TokenDataSize\r
  );\r
\r
\r
\r
/**\r
  Specifies a function to be called anytime the value of a designated token is changed.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_CALLBACK_ONSET) (\r
  IN  CONST EFI_GUID         *Guid, OPTIONAL\r
  IN  UINTN                  TokenNumber,\r
  IN  PCD_PPI_CALLBACK       CallBackFunction\r
  );\r
\r
\r
\r
/**\r
  Cancels a previously set callback function for a particular PCD token number.\r
\r
  @param[in]  TokenNumber The PCD token number. \r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\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
typedef\r
EFI_STATUS\r
(EFIAPI *PCD_PPI_CANCEL_CALLBACK) (\r
  IN  CONST EFI_GUID          *Guid, OPTIONAL\r
  IN  UINTN                   TokenNumber,\r
  IN  PCD_PPI_CALLBACK        CallBackFunction\r
  );\r
\r
\r
\r
/**\r
  Retrieves the next valid PCD token for a given namespace.\r
\r
  @param[in]  Guid The 128-bit unique value that designates the namespace from which to extract the value.\r
  @param[in, out]  TokenNumber A pointer to the PCD token number to use to find the subsequent token number.\r
                    If the input token namespace or token number does not exist on the platform, an error is \r