Add PcdLibNull library instance for Pcd Driver.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3166 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.c b/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.c
new file mode 100644 (file)
index 0000000..f3e8b51
--- /dev/null
+++ b/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.c
@@ -0,0 +1,833 @@
+/** @file\r
+  A emptry template implementation of PCD Library.\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:  PcdLib.c\r
+\r
+**/\r
+#include <PiDxe.h>\r
+\r
+\r
+/**\r
+  Sets the current SKU in the PCD database to the value specified by SkuId.  SkuId is returned.\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 SKU_ID Return the SKU ID that just be set.\r
+\r
+**/\r
+UINTN           \r
+EFIAPI\r
+LibPcdSetSku (\r
+  IN UINTN  SkuId\r
+  )\r
+{\r
+  ASSERT (SkuId < 0x100);\r
+\r
+  return SkuId;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 8-bit value for the token specified by TokenNumber. \r
+\r
+  @param[in]  The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT8 Returns the 8-bit value for the token specified by TokenNumber. \r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+LibPcdGet8 (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 16-bit value for the token specified by TokenNumber. \r
+\r
+  @param[in]  The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT16 Returns the 16-bit value for the token specified by TokenNumber. \r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+LibPcdGet16 (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 32-bit value for the token specified by TokenNumber. \r
+\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT32 Returns the 32-bit value for the token specified by TokenNumber.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+LibPcdGet32 (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 64-bit value for the token specified by TokenNumber.\r
+\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT64 Returns the 64-bit value for the token specified by TokenNumber.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+LibPcdGet64 (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the pointer to the buffer of the token specified by TokenNumber.\r
+\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval VOID* Returns the pointer to the token specified by TokenNumber.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+LibPcdGetPtr (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the Boolean value of the token specified by TokenNumber. \r
+\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval BOOLEAN Returns the Boolean value of the token specified by TokenNumber. \r
+\r
+**/\r
+BOOLEAN \r
+EFIAPI\r
+LibPcdGetBool (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the size of the token specified by TokenNumber. \r
+\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINTN Returns the size of the token specified by TokenNumber. \r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+LibPcdGetSize (\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 8-bit value for the token specified by TokenNumber and Guid.\r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT8 Return the UINT8.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+LibPcdGetEx8 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 16-bit value for the token specified by TokenNumber and Guid.\r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT16 Return the UINT16.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+LibPcdGetEx16 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 32-bit value for the token specified by TokenNumber and Guid.\r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT32 Return the UINT32.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+LibPcdGetEx32 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the 64-bit value for the token specified by TokenNumber and Guid.\r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINT64 Return the UINT64.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+LibPcdGetEx64 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the pointer to the buffer of the token specified by TokenNumber and Guid.\r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval VOID* Return the VOID* pointer.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+LibPcdGetExPtr (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the Boolean value of the token specified by TokenNumber and Guid. \r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval BOOLEAN Return the BOOLEAN.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+LibPcdGetExBool (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Returns the size of the token specified by TokenNumber and Guid. \r
+  If Guid is NULL, then ASSERT(). \r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates \r
+              which namespace to retrieve a value from.\r
+  @param[in]  TokenNumber The PCD token number to retrieve a current value for.\r
+\r
+  @retval UINTN Return the size.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+LibPcdGetExSize (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 8-bit value for the token specified by TokenNumber \r
+  to the value specified by Value.  Value is returned.\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 8-bit value to set.\r
+\r
+  @retval UINT8 Return the value been set.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+LibPcdSet8 (\r
+  IN UINTN             TokenNumber,\r
+  IN UINT8             Value\r
+  )\r
+{\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 16-bit value for the token specified by TokenNumber \r
+  to the value specified by Value.  Value is returned.\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 16-bit value to set.\r
+\r
+  @retval UINT16 Return the value been set.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+LibPcdSet16 (\r
+  IN UINTN             TokenNumber,\r
+  IN UINT16            Value\r
+  )\r
+{\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 32-bit value for the token specified by TokenNumber \r
+  to the value specified by Value.  Value is returned.\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 32-bit value to set.\r
+\r
+  @retval UINT32 Return the value been set.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+LibPcdSet32 (\r
+  IN UINTN              TokenNumber,\r
+  IN UINT32             Value\r
+  )\r
+{\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 64-bit value for the token specified by TokenNumber \r
+  to the value specified by Value.  Value is returned.\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 64-bit value to set.\r
+\r
+  @retval UINT64 Return the value been set.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+LibPcdSet64 (\r
+  IN UINTN              TokenNumber,\r
+  IN UINT64             Value\r
+  )\r
+{\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets a buffer for the token specified by TokenNumber to \r
+  the value specified by Buffer and SizeOfValue.  Buffer to\r
+  be set is returned. The content of the buffer could be \r
+  overwritten if a Callback on SET is registered with this\r
+  TokenNumber.\r
+  \r
+  If SizeOfValue is greater than the maximum \r
+  size support by TokenNumber, then set SizeOfValue to the \r
+  maximum size supported by TokenNumber and return NULL to \r
+  indicate that the set operation was not actually performed. \r
+  \r
+  If SizeOfValue > 0 and Buffer is NULL, then ASSERT().\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in,out] SizeOfBuffer The size, in bytes, of Buffer.\r
+  @param[in]  Value A pointer to the buffer to set.\r
+\r
+  @retval VOID* Return the pointer for the buffer been set.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+LibPcdSetPtr (\r
+  IN      UINTN             TokenNumber,\r
+  IN OUT  UINTN             *SizeOfBuffer,\r
+  IN      VOID              *Buffer\r
+  )\r
+{\r
+  ASSERT (SizeOfBuffer != NULL);\r
+\r
+  if (*SizeOfBuffer > 0) {\r
+    ASSERT (Buffer != NULL);\r
+  }\r
+\r
+  return Buffer;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the Boolean value for the token specified by TokenNumber \r
+  to the value specified by Value.  Value is returned.\r
+  \r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The boolean value to set.\r
+\r
+  @retval BOOLEAN Return the value been set.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+LibPcdSetBool (\r
+  IN UINTN             TokenNumber,\r
+  IN BOOLEAN           Value\r
+  )\r
+{\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 8-bit value for the token specified by TokenNumber and \r
+  Guid to the value specified by Value. Value is returned.\r
+  If Guid is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 8-bit value to set.\r
+\r
+  @retval UINT8 Return the value been set.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+LibPcdSetEx8 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber,\r
+  IN UINT8             Value\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 16-bit value for the token specified by TokenNumber and \r
+  Guid to the value specified by Value. Value is returned.\r
+  If Guid is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 16-bit value to set.\r
+\r
+  @retval UINT8 Return the value been set.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+LibPcdSetEx16 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber,\r
+  IN UINT16            Value\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 32-bit value for the token specified by TokenNumber and \r
+  Guid to the value specified by Value. Value is returned.\r
+  If Guid is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 32-bit value to set.\r
+\r
+  @retval UINT32 Return the value been set.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+LibPcdSetEx32 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber,\r
+  IN UINT32            Value\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the 64-bit value for the token specified by TokenNumber and \r
+  Guid to the value specified by Value. Value is returned.\r
+  If Guid is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The 64-bit value to set.\r
+\r
+  @retval UINT64 Return the value been set.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+LibPcdSetEx64 (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber,\r
+  IN UINT64            Value\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets a buffer for the token specified by TokenNumber to the value specified by \r
+  Buffer and SizeOfValue.  Buffer is returned.  If SizeOfValue is greater than \r
+  the maximum size support by TokenNumber, then set SizeOfValue to the maximum size \r
+  supported by TokenNumber and return NULL to indicate that the set operation \r
+  was not actually performed. \r
+  \r
+  If SizeOfValue > 0 and Buffer is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in, out] SizeOfBuffer The size, in bytes, of Buffer.\r
+  @param[in]  Buffer A pointer to the buffer to set.\r
+\r
+  @retval VOID * Return the pinter to the buffer been set.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+LibPcdSetExPtr (\r
+  IN      CONST GUID        *Guid,\r
+  IN      UINTN             TokenNumber,\r
+  IN OUT  UINTN             *SizeOfBuffer,\r
+  IN      VOID              *Buffer\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  ASSERT (SizeOfBuffer != NULL);\r
+  \r
+  if (*SizeOfBuffer > 0) {\r
+    ASSERT (Buffer != NULL);\r
+  }\r
+\r
+  return Buffer;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the Boolean value for the token specified by TokenNumber and \r
+  Guid to the value specified by Value. Value is returned.\r
+  If Guid is NULL, then ASSERT().\r
+  \r
+  @param[in]  Guid Pointer to a 128-bit unique value that \r
+              designates which namespace to set a value from.\r
+  @param[in]  TokenNumber The PCD token number to set a current value for.\r
+  @param[in]  Value The Boolean value to set.\r
+\r
+  @retval Boolean Return the value been set.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+LibPcdSetExBool (\r
+  IN CONST GUID        *Guid,\r
+  IN UINTN             TokenNumber,\r
+  IN BOOLEAN           Value\r
+  )\r
+{\r
+  ASSERT (Guid != NULL);\r
+\r
+  return Value;\r
+}\r
+\r
+\r
+\r
+/**\r
+  When the token specified by TokenNumber and Guid is set, \r
+  then notification function specified by NotificationFunction is called.  \r
+  If Guid is NULL, then the default token space is used. \r
+  If NotificationFunction is NULL, then ASSERT().\r
+\r
+  @param[in]  Guid Pointer to a 128-bit unique value that designates which \r
+              namespace to set a value from.  If NULL, then the default \r
+              token space is used.\r
+  @param[in]  TokenNumber The PCD token number to monitor.\r
+  @param[in]  NotificationFunction The function to call when the token \r
+              specified by Guid and TokenNumber is set.\r
+\r
+  @retval VOID\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+LibPcdCallbackOnSet (\r
+  IN CONST GUID               *Guid,       OPTIONAL\r
+  IN UINTN                    TokenNumber,\r
+  IN PCD_CALLBACK             NotificationFunction\r
+  )\r
+{\r
+  ASSERT (NotificationFunction != NULL);\r
+}\r
+\r
+\r
+\r
+/**\r
+  Disable a notification function that was established with LibPcdCallbackonSet().\r
+  If NotificationFunction is NULL, then ASSERT().\r
+\r
+  @param[in]  Guid Specify the GUID token space.\r
+  @param[in]  TokenNumber Specify the token number.\r
+  @param[in]  NotificationFunction The callback function to be unregistered.\r
+\r
+  @retval VOID\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+LibPcdCancelCallback (\r
+  IN CONST GUID               *Guid,       OPTIONAL\r
+  IN UINTN                    TokenNumber,\r
+  IN PCD_CALLBACK             NotificationFunction\r
+  )\r
+{\r
+  ASSERT (NotificationFunction != NULL);\r
+}\r
+\r
+\r
+\r
+/**\r
+  Retrieves the next PCD token number from the token space specified by Guid.  \r
+  If Guid is NULL, then the default token space is used.  If TokenNumber is 0, \r
+  then the first token number is returned.  Otherwise, the token number that \r
+  follows TokenNumber in the token space is returned.  If TokenNumber is the last \r
+  token number in the token space, then 0 is returned.  If TokenNumber is not 0 and \r
+  is not in the token space specified by Guid, then ASSERT().\r
+\r
+  @param[in]  Pointer to a 128-bit unique value that designates which namespace \r
+              to set a value from.  If NULL, then the default token space is used.\r
+  @param[in]  The previous PCD token number.  If 0, then retrieves the first PCD \r
+              token number.\r
+\r
+  @retval UINTN            The next valid token number.\r
+\r
+**/\r
+UINTN           \r
+EFIAPI\r
+LibPcdGetNextToken (\r
+  IN CONST GUID               *Guid, OPTIONAL\r
+  IN       UINTN              TokenNumber\r
+  )\r
+{\r
+  return 0;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Retrieves the next PCD token space from a token space specified by Guid.\r
+  Guid of NULL is reserved to mark the default local token namespace on the current\r
+  platform. If Guid is NULL, then the GUID of the first non-local token space of the \r
+  current platform is returned. If Guid is the last non-local token space, \r
+  then NULL is returned. \r
+\r
+  If Guid is not NULL and is not a valid token space in the current platform, then ASSERT().\r
+\r
+\r
+  \r
+  @param[in]  Pointer to a 128-bit unique value that designates from which namespace \r
+              to start the search.\r
+\r
+  @retval CONST GUID *  The next valid token namespace.\r
+\r
+**/\r
+GUID *           \r
+EFIAPI\r
+LibPcdGetNextTokenSpace (\r
+  IN CONST GUID  *Guid\r
+  )\r
+{\r
+  return NULL;\r
+}\r
+\r
+\r
+\r
+/**\r
+  Sets the PCD entry specified by PatchVariable to the value specified by Buffer \r
+  and SizeOfValue.  Buffer is returned.  If SizeOfValue is greater than \r
+  MaximumDatumSize, then set SizeOfValue to MaximumDatumSize and return \r
+  NULL to indicate that the set operation was not actually performed.  \r
+  If SizeOfValue is set to MAX_ADDRESS, then SizeOfValue must be set to \r
+  MaximumDatumSize and NULL must be returned.\r
+  \r
+  If PatchVariable is NULL, then ASSERT().\r
+  If SizeOfValue is NULL, then ASSERT().\r
+  If SizeOfValue > 0 and Buffer is NULL, then ASSERT().\r
+\r
+  @param[in] PatchVariable      A pointer to the global variable in a module that is \r
+                                the target of the set operation.\r
+  @param[in] MaximumDatumSize   The maximum size allowed for the PCD entry specified by PatchVariable.\r
+  @param[in, out] SizeOfBuffer  A pointer to the size, in bytes, of Buffer.\r
+  @param[in] Buffer             A pointer to the buffer to used to set the target variable.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+LibPatchPcdSetPtr (\r
+  IN        VOID        *PatchVariable,\r
+  IN        UINTN       MaximumDatumSize,\r
+  IN OUT    UINTN       *SizeOfBuffer,\r
+  IN CONST  VOID        *Buffer\r
+  )\r
+{\r
+  ASSERT (PatchVariable != NULL);\r
+  ASSERT (SizeOfBuffer  != NULL);\r
+  \r
+  if (*SizeOfBuffer > 0) {\r
+    ASSERT (Buffer != NULL);\r
+  }\r
+\r
+  if ((*SizeOfBuffer > MaximumDatumSize) ||\r
+      (*SizeOfBuffer == MAX_ADDRESS)) {\r
+    *SizeOfBuffer = MaximumDatumSize;\r
+    return NULL;\r
+  }\r
+    \r
+  CopyMem (PatchVariable, Buffer, *SizeOfBuffer);\r
+  \r
+  return (VOID *) Buffer;\r
+}\r
+\r

diff --git a/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.inf b/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.inf
new file mode 100644 (file)
index 0000000..e443e48
--- /dev/null
+++ b/MdeModulePkg/Library/PcdDriverPcdLibNull/PcdLib.inf
@@ -0,0 +1,83 @@
+#/** @file\r
+# PCD Library instance implemented with PCD Protocol\r
+#\r
+# This library instance implement the APIs listed \r
+#  in PCD library class defined in MDE library specification.\r
+#  It is used by modules in DXE phase.\r
+# Copyright (c) 2007, Intel Corporation.\r
+#\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
+#  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
+\r
+################################################################################\r
+#\r
+# Defines Section - statements that will be processed to create a Makefile.\r
+#\r
+################################################################################\r
+[Defines]\r
+  INF_VERSION                    = 0x00010005\r
+  BASE_NAME                      = PcdDriverPcdLib\r
+  FILE_GUID                      = 40096a3a-5c2a-4fbc-aef7-5475dd7ab334\r
+  MODULE_TYPE                    = DXE_DRIVER\r
+  VERSION_STRING                 = 1.0\r
+  LIBRARY_CLASS                  = PcdLib|DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER \r
+  EDK_RELEASE_VERSION            = 0x00020000\r
+  EFI_SPECIFICATION_VERSION      = 0x00020000\r
+\r
+#\r
+# The following information is for reference only and not required by the build tools.\r
+#\r
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC\r
+#\r
+\r
+################################################################################\r
+#\r
+# Sources Section - list of files that are required for the build to succeed.\r
+#\r
+################################################################################\r
+\r
+[Sources.common]\r
+  PcdLib.c\r
+\r
+\r
+################################################################################\r
+#\r
+# Package Dependency Section - list of Package files that are required for\r
+#                              this module.\r
+#\r
+################################################################################\r
+\r
+[Packages]\r
+  MdePkg/MdePkg.dec\r
+  MdeModulePkg/MdeModulePkg.dec\r
+\r
+################################################################################\r
+#\r
+# Library Class Section - list of Library Classes that are required for\r
+#                         this module.\r
+#\r
+################################################################################\r
+\r
+[LibraryClasses]\r
+  BaseMemoryLib\r
+  UefiBootServicesTableLib\r
+  DebugLib\r
+\r
+\r
+################################################################################\r
+#\r
+# Protocol C Name Section - list of Protocol and Protocol Notify C Names\r
+#                           that this module uses or produces.\r
+#\r
+################################################################################\r
+\r
+[Protocols]\r
+  gPcdProtocolGuid                              # PROTOCOL ALWAYS_CONSUMED\r
+\r