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/*++
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
Flash device library class header file.
Flash Device Library common type, MACRO and API definition. The basic idea for
this library is to provide API to abstract the different between flash
technology (SPI, FWH etc..), flash controller (SPI host controller on
ICH, MMIO type access for FWH), flash chip (programming command, method
of status checking). This library class can be consumed by drivers or applications
such as Firmware Volume Block driver, Flash Update application. These driver
can be written in a generic manner so that they are more easy to be
ported to other platforms.
This library can be build on a set of APIs which can touch flash controller, flash
chip directly for a platform with simple flash device configuration.
For a platform with complex flash device configuration, this library can be built
on the Flash Device Operate Library. Please see the header file for that library
class for detailed usage.
**/
#ifndef __FLASHDEVICE_LIB_H__
#define __FLASHDEVICE_LIB_H__
/**
Read NumBytes bytes of data from the address specified by
PAddress into Buffer.
@param[in] PAddress The starting physical address of the read.
@param[in,out] NumBytes On input, the number of bytes to read. On output, the number
of bytes actually read.
@param[out] Buffer The destination data buffer for the read.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceRead (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
OUT UINT8 *Buffer
);
/**
Write NumBytes bytes of data from Buffer to the address specified by
PAddresss.
@param[in] PAddress The starting physical address of the write.
@param[in,out] NumBytes On input, the number of bytes to write. On output,
the actual number of bytes written.
@param[in] Buffer The source data buffer for the write.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceWrite (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
IN UINT8 *Buffer
);
/**
Erase the block staring at PAddress.
@param[in] PAddress The starting physical address of the region to be erased.
@param[in] LbaLength The length of the region to be erased. This parameter is necessary
as the physical block size on a flash device could be different than
the logical block size of Firmware Volume Block protocol. Erase on
flash chip is always performed block by block. Therefore, the ERASE
operation to a logical block is converted a number of ERASE operation
(or a partial erase) on the hardware.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockErase (
IN UINTN PAddress,
IN UINTN LbaLength
);
/**
Lock or unlock the block staring at PAddress.
@param[in] PAddress The starting physical address of region to be (un)locked.
@param[in] LbaLength The length of the region to be (un)locked. This parameter is necessary
as the physical block size on a flash device could be different than
the logical block size of Firmware Volume Block protocol. (Un)Lock on
flash chip is always performed block by block. Therefore, the (Un)Lock
operation to a logical block is converted a number of (Un)Lock operation
(or a partial erase) on the hardware.
@param[in] Lock TRUE to lock. FALSE to unlock.
@retval EFI_SUCCESS. Opertion is successful.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockLock (
IN UINTN PAddress,
IN UINTN LbaLength,
IN BOOLEAN Lock
);
#endif
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