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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup libblock
*
* @brief Provide SRAM support for the NV Disk
*/
/*
* Copyright 2007 Chris Johns (chrisj@rtems.org)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <rtems.h>
#include <rtems/nvdisk-sram.h>
#ifndef NVDISK_SRAM_ERROR_TRACE
#define NVDISK_SRAM_ERROR_TRACE (0)
#endif
static int
rtems_nvdisk_sram_read (uint32_t device RTEMS_UNUSED,
uint32_t flags RTEMS_UNUSED,
void* base,
uint32_t offset,
void* buffer,
size_t size)
{
memcpy (buffer, (base + offset), size);
return 0;
}
static int
rtems_nvdisk_sram_write (uint32_t device RTEMS_UNUSED,
uint32_t flags RTEMS_UNUSED,
void* base,
uint32_t offset,
const void* buffer,
size_t size)
{
memcpy ((base + offset), buffer, size);
return 0;
}
static int
rtems_nvdisk_sram_verify (uint32_t device RTEMS_UNUSED,
uint32_t flags RTEMS_UNUSED,
void* base,
uint32_t offset,
const void* buffer,
size_t size)
{
return memcmp ((base + offset), buffer, size) == 0 ? 0 : EIO;
}
const rtems_nvdisk_driver_handlers rtems_nvdisk_sram_handlers =
{
.read = rtems_nvdisk_sram_read,
.write = rtems_nvdisk_sram_write,
.verify = rtems_nvdisk_sram_verify
};
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