SignedCapsulePkg/Library/PlatformFlashAccessLibNull/PlatformFlashAccessLibNull.c

   1 /** @file
   2   Platform flash device access library NULL instance.
   3
   4   Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiDxe.h>
  16
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/PlatformFlashAccessLib.h>
  19
  20 UINT64 mInternalFdAddress;
  21
  22 /**
  23   Perform flash write opreation.
  24
  25   @param[in] FirmwareType      The type of firmware.
  26   @param[in] FlashAddress      The address of flash device to be accessed.
  27   @param[in] FlashAddressType  The type of flash device address.
  28   @param[in] Buffer            The pointer to the data buffer.
  29   @param[in] Length            The length of data buffer in bytes.
  30
  31   @retval EFI_SUCCESS           The operation returns successfully.
  32   @retval EFI_WRITE_PROTECTED   The flash device is read only.
  33   @retval EFI_UNSUPPORTED       The flash device access is unsupported.
  34   @retval EFI_INVALID_PARAMETER The input parameter is not valid.
  35 **/
  36 EFI_STATUS
  37 EFIAPI
  38 PerformFlashWrite (
  39   IN PLATFORM_FIRMWARE_TYPE       FirmwareType,
  40   IN EFI_PHYSICAL_ADDRESS         FlashAddress,
  41   IN FLASH_ADDRESS_TYPE           FlashAddressType,
  42   IN VOID                         *Buffer,
  43   IN UINTN                        Length
  44   )
  45 {
  46   if (FlashAddressType == FlashAddressTypeRelativeAddress) {
  47     FlashAddress = FlashAddress + mInternalFdAddress;
  48   }
  49   CopyMem((VOID *)(UINTN)(FlashAddress), Buffer, Length);
  50   return EFI_SUCCESS;
  51 }