117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
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* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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* Memory Functions
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*
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* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
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*/
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#include <common.h>
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#include <command.h>
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#include <init.h>
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#include <driver.h>
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#include <malloc.h>
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#include <errno.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <linux/stat.h>
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#include <xfuncs.h>
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extern char *mem_rw_buf;
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static int do_mem_md(int argc, char *argv[])
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{
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loff_t start = 0, size = 0x100;
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int r, now;
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int ret = 0;
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int fd;
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char *filename = "/dev/mem";
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int mode = O_RWSIZE_4;
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int swab = 0;
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if (argc < 2)
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return COMMAND_ERROR_USAGE;
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if (mem_parse_options(argc, argv, "bwls:x", &mode, &filename, NULL,
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&swab) < 0)
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return 1;
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if (optind < argc) {
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if (parse_area_spec(argv[optind], &start, &size)) {
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printf("could not parse: %s\n", argv[optind]);
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return 1;
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}
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if (size == ~0)
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size = 0x100;
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}
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fd = open_and_lseek(filename, mode | O_RDONLY, start);
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if (fd < 0)
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return 1;
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do {
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now = min(size, (loff_t)RW_BUF_SIZE);
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r = read(fd, mem_rw_buf, now);
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if (r < 0) {
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perror("read");
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goto out;
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}
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if (!r)
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goto out;
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if ((ret = memory_display(mem_rw_buf, start, r,
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mode >> O_RWSIZE_SHIFT, swab)))
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goto out;
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start += r;
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size -= r;
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} while (size);
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out:
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close(fd);
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return ret ? 1 : 0;
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}
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BAREBOX_CMD_HELP_START(md)
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BAREBOX_CMD_HELP_TEXT("Display (hex dump) a memory region.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-b", "byte access")
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BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)")
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BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)")
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BAREBOX_CMD_HELP_OPT ("-s FILE", "display file (default /dev/mem)")
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BAREBOX_CMD_HELP_OPT ("-x", "swap bytes at output")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Memory regions can be specified in two different forms: START+SIZE")
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BAREBOX_CMD_HELP_TEXT("or START-END, If START is omitted it defaults to 0x100")
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BAREBOX_CMD_HELP_TEXT("Sizes can be specified as decimal, or if prefixed with 0x as hexadecimal.")
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BAREBOX_CMD_HELP_TEXT("An optional suffix of k, M or G is for kbytes, Megabytes or Gigabytes.")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(md)
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.cmd = do_mem_md,
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BAREBOX_CMD_DESC("memory display")
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BAREBOX_CMD_OPTS("[-bwlsx] REGION")
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BAREBOX_CMD_GROUP(CMD_GRP_MEM)
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BAREBOX_CMD_HELP(cmd_md_help)
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BAREBOX_CMD_END
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