/** @file
  SMM Library instance of SPI Flash Common Library Class

@copyright
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  This file contains a 'Sample Driver' and is licensed as such under the terms
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@par Specification Reference:

**/

#include <Library/SpiFlashCommon.h>
#include <Library/SmmServicesTableLib.h>
#include <Protocol/BiosGuard.h>

extern PCH_SPI_PROTOCOL   *mSpiProtocol;
extern BIOSGUARD_PROTOCOL *mBiosGuardProtocol;

extern UINTN mBiosAreaBaseAddress;
extern UINTN mBiosSize;
extern UINTN mBiosOffset;

/**
  The library constructuor.

  The function does the necessary initialization work for this library
  instance.

  @param[in]  ImageHandle       The firmware allocated handle for the UEFI image.
  @param[in]  SystemTable       A pointer to the EFI system table.

  @retval     EFI_SUCCESS       The function always return EFI_SUCCESS for now.
                                It will ASSERT on error for debug version.
  @retval     EFI_ERROR         Please reference LocateProtocol for error code details.
**/
EFI_STATUS
EFIAPI
SmmSpiFlashCommonLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS Status;
  UINT32     BaseAddr;
  UINT32     RegionSize;

#if FixedPcdGetBool(PcdExtendedBiosRegionSupport) == 0
  mBiosAreaBaseAddress = (UINTN)PcdGet32 (PcdBiosAreaBaseAddress);
  mBiosSize            = (UINTN)PcdGet32 (PcdBiosSize);
#else
  mBiosAreaBaseAddress = (UINTN) PcdGet32 (PcdBiosAreaBaseAddress) + (UINTN) PcdGet32 (PcdFlashExtendRegionOffset);
  mBiosSize            = 0x1000000 + (UINTN) PcdGet32 (PcdFlashExtendRegionSizeInUse);
#endif
  //
  // Locate the SMM SPI protocol.
  //
  Status = gSmst->SmmLocateProtocol (
                    &gPchSmmSpiProtocolGuid,
                    NULL,
                    (VOID **) &mSpiProtocol
                    );
  ASSERT_EFI_ERROR (Status);

  mSpiProtocol->GetRegionAddress (mSpiProtocol, FlashRegionBios, &BaseAddr, &RegionSize);
  mBiosOffset = BaseAddr;

#if FixedPcdGetBool(PcdBiosGuardEnable) == 1
  //
  // Locate the BiosGuard protocol.
  //
  Status = gSmst->SmmLocateProtocol (
                  &gSmmBiosGuardProtocolGuid,
                  NULL,
                  (VOID **)&mBiosGuardProtocol
                  );
  ASSERT_EFI_ERROR (Status);
#endif

  return Status;
}