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