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/*
* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
/*
* Memory Functions
*
* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
*/
#include <common.h>
#include <command.h>
#include <init.h>
#include <driver.h>
#include <malloc.h>
#include <errno.h>
#include <fs.h>
#include <fcntl.h>
#include <getopt.h>
#include <linux/stat.h>
#include <xfuncs.h>
extern char *mem_rw_buf;
static int do_memset(int argc, char *argv[])
{
loff_t s, c, n;
int fd;
char *buf;
int mode = O_RWSIZE_1;
int ret = 1;
char *file = "/dev/mem";
if (mem_parse_options(argc, argv, "bwld:", &mode, NULL, &file,
NULL) < 0)
return 1;
if (optind + 3 > argc)
return COMMAND_ERROR_USAGE;
s = strtoull_suffix(argv[optind], NULL, 0);
c = strtoull_suffix(argv[optind + 1], NULL, 0);
n = strtoull_suffix(argv[optind + 2], NULL, 0);
fd = open_and_lseek(file, mode | O_WRONLY, s);
if (fd < 0)
return 1;
buf = xmalloc(RW_BUF_SIZE);
memset(buf, c, RW_BUF_SIZE);
while (n > 0) {
int now;
now = min((loff_t)RW_BUF_SIZE, n);
ret = write(fd, buf, now);
if (ret < 0) {
perror("write");
ret = 1;
goto out;
}
n -= now;
}
ret = 0;
out:
close(fd);
free(buf);
return ret;
}
static const __maybe_unused char cmd_memset_help[] =
"Usage: memset [OPTIONS] <addr> <c> <n>\n"
"\n"
"options:\n"
" -b, -w, -l use byte, halfword, or word accesses\n"
" -d <file> destination file (default /dev/mem)\n"
"\n"
"Fill the first <n> bytes at offset <addr> with byte <c>\n";
BAREBOX_CMD_START(memset)
.cmd = do_memset,
.usage = "memory fill",
BAREBOX_CMD_GROUP(CMD_GRP_MEM)
BAREBOX_CMD_HELP(cmd_memset_help)
BAREBOX_CMD_END
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