124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2013 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.
|
|
*
|
|
*/
|
|
|
|
#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>
|
|
|
|
static int do_mem_mm(int argc, char *argv[])
|
|
{
|
|
int ret = 0;
|
|
int fd;
|
|
char *filename = "/dev/mem";
|
|
int mode = O_RWSIZE_4;
|
|
loff_t adr;
|
|
int swab = 0;
|
|
u8 val8;
|
|
u16 val16;
|
|
u32 val32;
|
|
u32 value, mask;
|
|
|
|
if (mem_parse_options(argc, argv, "bwld:", &mode, NULL, &filename,
|
|
&swab) < 0)
|
|
return 1;
|
|
|
|
if (optind + 2 >= argc)
|
|
return COMMAND_ERROR_USAGE;
|
|
|
|
adr = strtoull_suffix(argv[optind++], NULL, 0);
|
|
value = simple_strtoul(argv[optind++], NULL, 0);
|
|
mask = simple_strtoul(argv[optind++], NULL, 0);
|
|
|
|
fd = open_and_lseek(filename, mode | O_RDWR, adr);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
switch (mode) {
|
|
case O_RWSIZE_1:
|
|
ret = pread(fd, &val8, 1, adr);
|
|
if (ret < 0)
|
|
goto out_read;
|
|
val8 &= ~mask;
|
|
val8 |= (value & mask);
|
|
ret = pwrite(fd, &val8, 1, adr);
|
|
if (ret < 0)
|
|
goto out_write;
|
|
break;
|
|
case O_RWSIZE_2:
|
|
ret = pread(fd, &val16, 2, adr);
|
|
if (ret < 0)
|
|
goto out_read;
|
|
val16 &= ~mask;
|
|
val16 |= (value & mask);
|
|
ret = pwrite(fd, &val16, 2, adr);
|
|
if (ret < 0)
|
|
goto out_write;
|
|
break;
|
|
case O_RWSIZE_4:
|
|
if (ret < 0)
|
|
goto out_read;
|
|
ret = pread(fd, &val32, 4, adr);
|
|
val32 &= ~mask;
|
|
val32 |= (value & mask);
|
|
ret = pwrite(fd, &val32, 4, adr);
|
|
if (ret < 0)
|
|
goto out_write;
|
|
break;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
|
|
out_read:
|
|
perror("read");
|
|
close(fd);
|
|
return 1;
|
|
|
|
out_write:
|
|
perror("write");
|
|
close(fd);
|
|
return 1;
|
|
}
|
|
|
|
BAREBOX_CMD_HELP_START(mm)
|
|
BAREBOX_CMD_HELP_TEXT("Set/clear bits specified with MASK in ADDR to VALUE")
|
|
BAREBOX_CMD_HELP_TEXT("")
|
|
BAREBOX_CMD_HELP_TEXT("Options:")
|
|
BAREBOX_CMD_HELP_OPT ("-b", "byte access")
|
|
BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)")
|
|
BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)")
|
|
BAREBOX_CMD_HELP_OPT ("-d FILE", "write file (default /dev/mem)")
|
|
BAREBOX_CMD_HELP_END
|
|
|
|
|
|
BAREBOX_CMD_START(mm)
|
|
.cmd = do_mem_mm,
|
|
BAREBOX_CMD_DESC("memory modify with mask")
|
|
BAREBOX_CMD_OPTS("[-bwld] ADDR VAL MASK")
|
|
BAREBOX_CMD_GROUP(CMD_GRP_MEM)
|
|
BAREBOX_CMD_HELP(cmd_mm_help)
|
|
BAREBOX_CMD_END
|