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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/**
* @file
* @brief mw: memory write command
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <errno.h>
#include <fs.h>
#include <fcntl.h>
#include <getopt.h>
#include <linux/stat.h>
#include <xfuncs.h>
static int do_mem_mw ( cmd_tbl_t *cmdtp, int argc, char *argv[])
{
int ret = 0;
int fd;
char *filename = memory_device;
int mode = O_RWSIZE_4;
ulong adr;
errno = 0;
if (mem_parse_options(argc, argv, "bwld:", &mode, NULL, &filename) < 0)
return 1;
if (optind + 1 >= argc) {
u_boot_cmd_usage(cmdtp);
return 1;
}
adr = strtoul_suffix(argv[optind++], NULL, 0);
fd = open_and_lseek(filename, mode | O_WRONLY, adr);
if (fd < 0)
return 1;
while (optind < argc) {
u8 val8;
u16 val16;
u32 val32;
switch (mode) {
case O_RWSIZE_1:
val8 = simple_strtoul(argv[optind], NULL, 0);
ret = write(fd, &val8, 1);
break;
case O_RWSIZE_2:
val16 = simple_strtoul(argv[optind], NULL, 0);
ret = write(fd, &val16, 2);
break;
case O_RWSIZE_4:
val32 = simple_strtoul(argv[optind], NULL, 0);
ret = write(fd, &val32, 4);
break;
}
if (ret < 0) {
perror("write");
break;
}
optind++;
}
return errno;
}
static __maybe_unused char cmd_mw_help[] =
"Usage: mw [OPTIONS] <region> <value(s)>\n"
"Write value(s) to the specifies region.\n"
"see 'help md' for supported options.\n";
U_BOOT_CMD_START(mw)
.maxargs = CONFIG_MAXARGS,
.cmd = do_mem_mw,
.usage = "memory write (fill)",
U_BOOT_CMD_HELP(cmd_mw_help)
U_BOOT_CMD_END
/**
@page mw_command mw: write something somewhere
Usage is: mw [Options] \<region>
Options are:
- -s \<file> display file (default /dev/mem)
- -d \<file> write file (default /dev/mem)
- -b output in bytes
- -w output in halfwords (16bit)
- -l output in words (32bit)
Memory regions:
- Memory regions can be specified in two different forms: \b \<start>+\<size>
or \b \<start>-\<end>
- If \b \<start> is ommitted it defaults to 0.
- If \b \<end> is ommited it defaults to the end of the device, except for
interactive commands like \c md and \c mw for which it defaults to 0x100.
- Sizes can be specified as decimal, or if prefixed with 0x as hexadecimal.
- an optional suffix of k, M or G is for kibibytes, Megabytes or Gigabytes,
respectively
For usage examples refer the \c md command.
*/
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