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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: © 2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
#include <common.h>
#include <command.h>
#include <init.h>
#include <driver.h>
#include <malloc.h>
#include <errno.h>
#include <fs.h>
#include <libfile.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;
int fd;
char *filename = "/dev/mem";
int mode = O_RWSIZE_4;
loff_t adr;
int swab = 0;
u8 val8;
u16 val16;
u32 val32;
u64 val64;
u64 value, mask;
if (mem_parse_options(argc, argv, "bwlqd:", &mode, NULL, &filename,
&swab) < 0)
return 1;
if (optind + 2 >= argc)
return COMMAND_ERROR_USAGE;
adr = strtoull_suffix(argv[optind++], NULL, 0);
value = simple_strtoull(argv[optind++], NULL, 0);
mask = simple_strtoull(argv[optind++], NULL, 0);
fd = open_and_lseek(filename, mode | O_RDWR | O_CREAT, adr);
if (fd < 0) {
printf("Could not open \"%s\": %m\n", filename);
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:
ret = pread(fd, &val32, 4, adr);
if (ret < 0)
goto out_read;
val32 &= ~mask;
val32 |= (value & mask);
ret = pwrite(fd, &val32, 4, adr);
if (ret < 0)
goto out_write;
break;
case O_RWSIZE_8:
ret = pread(fd, &val64, 8, adr);
if (ret < 0)
goto out_read;
val64 &= ~mask;
val64 |= (value & mask);
ret = pwrite(fd, &val64, 8, 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 ("-q", "quad access (64 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("[-bwlq] [-d FILE] ADDR VAL MASK")
BAREBOX_CMD_GROUP(CMD_GRP_MEM)
BAREBOX_CMD_HELP(cmd_mm_help)
BAREBOX_CMD_END
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