path: root/EdkModulePkg/Universal/PCD/Pei/Pcd.c

/** @file PCD PEIM

Copyright (c) 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             


Module Name: Pcd.c

**/

#include "Service.h"


PCD_PPI mPcdPpiInstance = {
  PeiPcdSetSku,

  PeiPcdGet8,
  PeiPcdGet16,          
  PeiPcdGet32,          
  PeiPcdGet64,          
  PeiPcdGetPtr,         
  PeiPcdGetBool,     
  PeiPcdGetSize,

  PeiPcdGet8Ex,
  PeiPcdGet16Ex,          
  PeiPcdGet32Ex,          
  PeiPcdGet64Ex,          
  PeiPcdGetPtrEx,         
  PeiPcdGetBoolEx,     
  PeiPcdGetSizeEx,
  
  PeiPcdSet8,
  PeiPcdSet16,          
  PeiPcdSet32,          
  PeiPcdSet64,          
  PeiPcdSetPtr,         
  PeiPcdSetBool,     

  PeiPcdSet8Ex,
  PeiPcdSet16Ex,          
  PeiPcdSet32Ex,          
  PeiPcdSet64Ex,          
  PeiPcdSetPtrEx,         
  PeiPcdSetBoolEx,

  PeiRegisterCallBackOnSet,
  PcdUnRegisterCallBackOnSet,
  PeiPcdGetNextToken,
  PeiPcdGetNextTokenSpace
};



STATIC EFI_PEI_PPI_DESCRIPTOR  mPpiPCD = {
  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  &gPcdPpiGuid,
  &mPcdPpiInstance
};



EFI_STATUS
EFIAPI
PcdPeimInit (
  IN EFI_FFS_FILE_HEADER      *FfsHeader,
  IN EFI_PEI_SERVICES         **PeiServices
  )
{
  EFI_STATUS Status;

  BuildPcdDatabase ();
  
  Status = PeiServicesInstallPpi (&mPpiPCD);

  ASSERT_EFI_ERROR (Status);
  
  return EFI_SUCCESS;
}

VOID
EFIAPI
PeiPcdSetSku (
  IN  UINTN                  SkuId
  )
{

  GetPcdDatabase()->Init.SystemSkuId = (SKU_ID) SkuId;

  return;
}



UINT8
EFIAPI
PeiPcdGet8 (
  IN UINTN             TokenNumber
  )
{
  return *((UINT8 *) GetWorker (TokenNumber, sizeof (UINT8)));
}



UINT16
EFIAPI
PeiPcdGet16 (
  IN UINTN             TokenNumber
  )
{
  return ReadUnaligned16 (GetWorker (TokenNumber, sizeof (UINT16)));
}



UINT32
EFIAPI
PeiPcdGet32 (
  IN UINTN             TokenNumber
  )
{
  return ReadUnaligned32 (GetWorker (TokenNumber, sizeof (UINT32)));
}



UINT64
EFIAPI
PeiPcdGet64 (
  IN UINTN             TokenNumber
  )
{
  return ReadUnaligned64 (GetWorker (TokenNumber, sizeof (UINT64)));
}



VOID *
EFIAPI
PeiPcdGetPtr (
  IN UINTN             TokenNumber
  )
{
  return GetWorker (TokenNumber, 0);
}



BOOLEAN
EFIAPI
PeiPcdGetBool (
  IN UINTN             TokenNumber
  )
{
  return *((BOOLEAN *) GetWorker (TokenNumber, sizeof (BOOLEAN)));
}



UINTN
EFIAPI
PeiPcdGetSize (
  IN UINTN             TokenNumber
  )
{
  PEI_PCD_DATABASE    *PeiPcdDb;
  UINTN               Size;
  UINTN               MaxSize;

  PeiPcdDb = GetPcdDatabase ();
  //
  // TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
  // We have to decrement TokenNumber by 1 to make it usable
  // as the array index.
  //
  TokenNumber--;

  ASSERT (TokenNumber < PEI_LOCAL_TOKEN_NUMBER);

  Size = (PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber] & PCD_DATUM_TYPE_ALL_SET) >> PCD_DATUM_TYPE_SHIFT;

  if (Size == 0) {
    //
    // For pointer type, we need to scan the SIZE_TABLE to get the current size.
    //
    return GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);
  } else {
    return Size;
  }

}



UINT8
EFIAPI
PeiPcdGet8Ex (
  IN CONST EFI_GUID        *Guid,
  IN UINTN             ExTokenNumber
  )
{
  return *((UINT8 *) ExGetWorker (Guid, ExTokenNumber, sizeof (UINT8)));
}



UINT16
EFIAPI
PeiPcdGet16Ex (
  IN CONST EFI_GUID        *Guid,
  IN UINTN             ExTokenNumber
  )
{
  return ReadUnaligned16 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT16)));
}



UINT32
EFIAPI
PeiPcdGet32Ex (
  IN CONST EFI_GUID        *Guid,
  IN UINTN             ExTokenNumber
  )
{
  return ReadUnaligned32 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT32)));
}



UINT64
EFIAPI
PeiPcdGet64Ex (
  IN CONST EFI_GUID        *Guid,
  IN UINTN             ExTokenNumber
  )
{
  return ReadUnaligned64 (ExGetWorker (Guid, ExTokenNumber, sizeof (UINT64)));
}



VOID *
EFIAPI
PeiPcdGetPtrEx (
  IN CONST EFI_GUID        *Guid,
  IN UINTN             ExTokenNumber
  )
{
  return ExGetWorker (Guid, ExTokenNumber, 0);
}



BOOLEAN
EFIAPI
PeiPcdGetBoolEx (
  IN CONST  EFI_GUID        *Guid,
  IN UINTN                             ExTokenNumber
  )
{
  return *((BOOLEAN *) ExGetWorker (Guid, ExTokenNumber, sizeof (BOOLEAN)));
}



UINTN
EFIAPI
PeiPcdGetSizeEx (
  IN CONST  EFI_GUID        *Guid,
  IN UINTN                             ExTokenNumber
  )
{
  return PeiPcdGetSize (GetExPcdTokenNumber (Guid, ExTokenNumber));
}



EFI_STATUS
EFIAPI
PeiPcdSet8 (
  IN UINTN                        TokenNumber,
  IN UINT8                        Value
  )
{
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet16 (
  IN UINTN                          TokenNumber,
  IN UINT16                         Value
  )
{
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet32 (
  IN UINTN                          TokenNumber,
  IN UINT32                         Value
  )
{
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet64 (
  IN UINTN                          TokenNumber,
  IN UINT64                         Value
  )
{
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}


EFI_STATUS
EFIAPI
PeiPcdSetPtr (
  IN      UINTN                         TokenNumber,
  IN OUT  UINTN                         *SizeOfBuffer,
  IN      VOID                          *Buffer
  )
{
  return SetWorker (TokenNumber, Buffer, SizeOfBuffer, TRUE);
}



EFI_STATUS
EFIAPI
PeiPcdSetBool (
  IN UINTN                          TokenNumber,
  IN BOOLEAN                        Value
  )
{
  return SetValueWorker (TokenNumber, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet8Ex (
  IN CONST EFI_GUID         *Guid,
  IN UINTN                  ExTokenNumber,
  IN UINT8                  Value
  )
{
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet16Ex (
  IN CONST EFI_GUID         *Guid,
  IN UINTN                  ExTokenNumber,
  IN UINT16                 Value
  )
{
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet32Ex (
  IN CONST EFI_GUID         *Guid,
  IN UINTN                  ExTokenNumber,
  IN UINT32                 Value
  )
{
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSet64Ex (
  IN CONST EFI_GUID         *Guid,
  IN UINTN                  ExTokenNumber,
  IN UINT64                 Value
  )
{
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}



EFI_STATUS
EFIAPI
PeiPcdSetPtrEx (
  IN CONST EFI_GUID         *Guid,
  IN UINTN                  ExTokenNumber,
  IN UINTN                  *SizeOfBuffer,
  IN VOID                   *Value
  )
{
  return ExSetWorker (ExTokenNumber, Guid, Value, SizeOfBuffer, TRUE);
}



EFI_STATUS
EFIAPI
PeiPcdSetBoolEx (
  IN CONST EFI_GUID       *Guid,
  IN UINTN                ExTokenNumber,
  IN BOOLEAN              Value
  )
{
  return ExSetValueWorker (ExTokenNumber, Guid, &Value, sizeof (Value));
}




EFI_STATUS
EFIAPI
PeiRegisterCallBackOnSet (
  IN  UINTN                       ExTokenNumber,
  IN  CONST EFI_GUID              *Guid, OPTIONAL
  IN  PCD_PPI_CALLBACK            CallBackFunction
  )
{
  ASSERT (CallBackFunction != NULL);
  
  return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, TRUE);
}



EFI_STATUS
EFIAPI
PcdUnRegisterCallBackOnSet (
  IN  UINTN                       ExTokenNumber,
  IN  CONST EFI_GUID              *Guid, OPTIONAL
  IN  PCD_PPI_CALLBACK            CallBackFunction
  )
{
  ASSERT (CallBackFunction != NULL);
  
  return PeiRegisterCallBackWorker (ExTokenNumber, Guid, CallBackFunction, FALSE);
}



EFI_STATUS
EFIAPI
PeiPcdGetNextToken (
  IN CONST EFI_GUID               *Guid, OPTIONAL
  IN OUT  UINTN                   *TokenNumber
  )
{
  UINTN               GuidTableIdx;
  PEI_PCD_DATABASE    *PeiPcdDb;
  EFI_GUID            *MatchGuid;
  DYNAMICEX_MAPPING   *ExMapTable;
  UINTN               i;
  BOOLEAN             Found;
    
  if (Guid == NULL) {
    (*TokenNumber)++;

    if (*TokenNumber >= PEI_NEX_TOKEN_NUMBER) {
      *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
    }
    
  } else {

    if (PEI_EXMAP_TABLE_EMPTY) {
      *TokenNumber = PCD_INVALID_TOKEN_NUMBER;
      return EFI_NOT_FOUND;
    }
    
    //
    // Assume PCD Database AutoGen tool is sorting the ExMap based on the following order
    // 1) ExGuid
    // 2) ExTokenNumber
    //
    PeiPcdDb = GetPcdDatabase ();
    
    MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), Guid);

    if (MatchGuid == NULL) {
      *TokenNumber = (UINTN) PCD_INVALID_TOKEN_NUMBER;
      return EFI_NOT_FOUND;
    }

    GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;

    ExMapTable = PeiPcdDb->Init.ExMapTable;

    Found = FALSE;
    for (i = 0; i < PEI_EXMAPPING_TABLE_SIZE; i++) {
      if (ExMapTable[i].ExGuidIndex == GuidTableIdx) {
        Found = TRUE;
        break;
      }
    }

    if (Found) {
      if (*TokenNumber == PCD_INVALID_TOKEN_NUMBER) {
        *TokenNumber = ExMapTable[i].ExTokenNumber;
         return EFI_SUCCESS;
      }
      
      for ( ; ExMapTable[i].ExGuidIndex == GuidTableIdx; i++) {
        if (ExMapTable[i].ExTokenNumber == *TokenNumber) {
          i++;
          if (ExMapTable[i].ExGuidIndex == GuidTableIdx) {
            *TokenNumber = ExMapTable[i].ExTokenNumber;
            return EFI_SUCCESS;
          } else {
            *TokenNumber = (UINTN) PCD_INVALID_TOKEN_NUMBER;
            return EFI_SUCCESS;
          }
        }
      }

      return EFI_NOT_FOUND;
    }
    
  }

  return EFI_SUCCESS;
}



EFI_STATUS
EFIAPI
PeiPcdGetNextTokenSpace (
  IN OUT CONST EFI_GUID               **Guid
  )
{
  UINTN               GuidTableIdx;
  EFI_GUID            *MatchGuid;
  PEI_PCD_DATABASE    *PeiPcdDb;
  DYNAMICEX_MAPPING   *ExMapTable;
  UINTN               i;
  BOOLEAN             Found;

  ASSERT (Guid != NULL);

  if (PEI_EXMAP_TABLE_EMPTY) {
    if (*Guid != NULL) {
      return EFI_NOT_FOUND;
    } else {
      return EFI_SUCCESS;
    }
  }

  //
  // Assume PCD Database AutoGen tool is sorting the ExMap based on the following order
  // 1) ExGuid
  // 2) ExTokenNumber
  //
  PeiPcdDb = GetPcdDatabase ();

  ExMapTable = PeiPcdDb->Init.ExMapTable;

  if (*Guid == NULL) {
    //
    // return the first Token Space Guid.
    //
    *Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[0].ExGuidIndex];
    return EFI_SUCCESS;
  }

  MatchGuid = ScanGuid (PeiPcdDb->Init.GuidTable, sizeof(PeiPcdDb->Init.GuidTable), *Guid);

  if (MatchGuid == NULL) {
    return EFI_NOT_FOUND;
  }
  
  GuidTableIdx = MatchGuid - PeiPcdDb->Init.GuidTable;

  Found = FALSE;
  for (i = 0; i < PEI_EXMAPPING_TABLE_SIZE; i++) {
    if (ExMapTable[i].ExGuidIndex == GuidTableIdx) {
      Found = TRUE;
      break;
    }
  }

  if (Found) {
    i++;
    for ( ; i < PEI_EXMAPPING_TABLE_SIZE; i++ ) {
      if (ExMapTable[i].ExGuidIndex != GuidTableIdx ) {
        *Guid = &PeiPcdDb->Init.GuidTable[ExMapTable[i].ExGuidIndex];
        return EFI_SUCCESS;
      }
    }
    *Guid = NULL;
    return EFI_SUCCESS;
  }

  return EFI_NOT_FOUND;

}