299 lines
11 KiB
C
299 lines
11 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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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
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/**
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* @file
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* @brief md: memory display command
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*/
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#include <common.h>
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#include <command.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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/* Memory Display
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*
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* Syntax:
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* md{.b, .w, .l} {addr} {len}
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*/
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#define DISP_LINE_LEN 16
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static int memory_display(char *addr, ulong offs, ulong nbytes, int size)
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{
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ulong linebytes, i;
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u_char *cp;
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/* Print the lines.
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*
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* We buffer all read data, so we can make sure data is read only
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* once, and all accesses are with the specified bus width.
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*/
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do {
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char linebuf[DISP_LINE_LEN];
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uint *uip = (uint *)linebuf;
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ushort *usp = (ushort *)linebuf;
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u_char *ucp = (u_char *)linebuf;
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printf("%08lx:", offs);
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linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
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for (i=0; i<linebytes; i+= size) {
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if (size == 4) {
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printf(" %08x", (*uip++ = *((uint *)addr)));
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} else if (size == 2) {
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printf(" %04x", (*usp++ = *((ushort *)addr)));
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} else {
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printf(" %02x", (*ucp++ = *((u_char *)addr)));
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}
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addr += size;
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offs += size;
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}
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puts (" ");
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cp = (u_char *)linebuf;
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for (i=0; i<linebytes; i++) {
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if ((*cp < 0x20) || (*cp > 0x7e))
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putchar('.');
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else
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printf("%c", *cp);
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cp++;
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}
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putchar('\n');
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nbytes -= linebytes;
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if (ctrlc()) {
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return -EINTR;
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}
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} while (nbytes > 0);
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return 0;
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}
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static int do_mem_md(cmd_tbl_t *cmdtp, int argc, char *argv[])
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{
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ulong 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 = memory_device;
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int mode = O_RWSIZE_4;
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errno = 0;
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if (mem_parse_options(argc, argv, "bwls:", &mode, &filename, NULL) < 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, RW_BUF_SIZE);
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r = read(fd, 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(rw_buf, start, r, mode >> O_RWSIZE_SHIFT)))
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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 errno;
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}
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static __maybe_unused char cmd_md_help[] =
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"Usage md [OPTIONS] <region>\n"
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"display (hexdump) a memory region.\n"
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"options:\n"
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" -s <file> display file (default /dev/mem)\n"
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" -d <file> write file (default /dev/mem)\n"
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" -b output in bytes\n"
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" -w output in halfwords (16bit)\n"
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" -l output in words (32bit)\n"
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"\n"
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"Memory regions:\n"
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"Memory regions can be specified in two different forms: start+size\n"
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"or start-end, If <start> is ommitted it defaults to 0. If end is ommited it\n"
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"defaults to the end of the device, except for interactive commands like md\n"
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"and mw for which it defaults to 0x100.\n"
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"Sizes can be specified as decimal, or if prefixed with 0x as hexadecimal.\n"
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"an optional suffix of k, M or G is for kibibytes, Megabytes or Gigabytes,\n"
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"respectively\n";
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U_BOOT_CMD_START(md)
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.maxargs = CONFIG_MAXARGS,
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.cmd = do_mem_md,
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.usage = "memory display",
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U_BOOT_CMD_HELP(cmd_md_help)
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U_BOOT_CMD_END
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/**
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@page md_command md: display (hexdump) something
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Usage is: md [Options] \<region>
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Options are:
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- -s \<file> display file (default /dev/mem)
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- -d \<file> write file (default /dev/mem)
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- -b output in bytes
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- -w output in halfwords (16bit)
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- -l output in words (32bit)
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Memory regions:
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- Memory regions can be specified in two different forms: \b \<start>+\<size>
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or \b \<start>-\<end>
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- If \b \<start> is ommitted it defaults to 0.
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- If \b \<end> is ommited it defaults to the end of the device, except for
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interactive commands like \c md and \c mw for which it defaults to 0x100.
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- Sizes can be specified as decimal, or if prefixed with 0x as hexadecimal.
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- an optional suffix of k, M or G is for kibibytes, Megabytes or Gigabytes,
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respectively
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\b Examples
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Hexdump 100 byes from the fixed physical address 0x400:
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@verbatim
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uboot:/ md -b 0x400
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00000400: 1d 1d 04 1a 53 49 00 e0 01 38 8a 8b d2 0b 02 d1 ....SI...8......
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00000410: 00 28 f9 d1 01 e0 00 28 0b d1 6a 20 6b 46 18 70 .(.....(..j kF.p
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00000420: 02 f0 ea f8 6b 46 58 70 00 98 01 21 00 f0 f9 f8 ....kFXp...!....
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00000430: 20 e0 4d 4d 1e e0 48 4d 1c e0 80 07 80 0f 00 25 .MM..HM.......%
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00000440: c6 1c 3b 48 41 6a 04 22 11 43 41 62 81 69 0f 22 ..;HAj.".CAb.i."
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00000450: 12 03 91 43 09 22 12 03 89 18 81 61 ff 20 00 f0 ...C.".....a. ..
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00000460: 17 fa 01 28 06 d1 30 1c 00 f0 7c fa 01 28 01 d1 ...(..0...|..(..
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00000470: 1b 25 ed 06 00 2d 35 d0 02 2c 01 95 05 d0 03 2c .%...-5..,.....,
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00000480: 03 d0 04 2c 01 d0 07 2c 06 d1 01 20 80 02 29 18 ...,...,... ..).
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00000490: 04 30 28 18 01 22 05 e0 01 20 00 03 29 18 04 30 .0(.."... ..)..0
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000004a0: 28 18 00 22 6b 46 5b 7a 08 2b 10 d0 00 92 02 1c (.."kF[z.+......
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000004b0: 01 23 01 a8 ff f7 4e fe 6b 46 02 90 18 7a f0 28 .#....N.kF...z.(
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000004c0: 0d d0 02 98 00 21 00 f0 ac f8 04 e0 0a e0 6b 46 .....!........kF
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000004d0: 18 7a f0 28 03 d0 6b 46 58 7a 01 28 02 d1 01 98 .z.(..kFXz.(....
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000004e0: 02 f0 4a fb ff f7 17 ff fe bc 08 bc 18 47 38 b5 ..J..........G8.
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000004f0: 04 1c 0a 48 0d 1c 40 68 00 90 02 f0 7d f8 08 28 ...H..@h....}..(
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@endverbatim
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Hexdump words from fixed physical address 0x000 up to 0x00f:
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@verbatim
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uboot:/ md -w 0x000-0x00f
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00000000: f00c e59f f11c e51f f11c e51f f11c e51f ................
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@endverbatim
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The examples above are using the generic \c /dev/mem device. But the \c md
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command can operate on any device. With the \c -s \c \<device> parameter you
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can give a different device to operate on.
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To access the flash memory you must not worry about where it is located in
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CPU's address space (this would be reqired when the \c /dev/mem is in use).
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Instead let \c md operate on the flash device itself. Or on partitions
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(devices on top of devices).
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Hexdump 100 bytes from the start of the flash memory:
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@verbatim
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uboot:/ md -b -s /dev/nor0
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00000000: 14 00 00 ea 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
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00000010: 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
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00000020: 00 01 f0 a7 60 01 f0 a7 c0 01 f0 a7 20 02 f0 a7 ....`....... ...
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00000030: 80 02 f0 a7 e0 02 f0 a7 40 03 f0 a7 ef be ad de ........@.......
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00000040: 00 00 f0 a7 00 00 f0 a7 00 00 b0 a7 00 20 ae a7 ............. ..
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00000050: 30 89 f1 a7 80 d7 f1 a7 00 00 0f e1 1f 00 c0 e3 0...............
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00000060: d3 00 80 e3 00 f0 29 e1 00 00 a0 e3 17 0f 07 ee ......).........
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00000070: 17 0f 08 ee 10 0f 11 ee 23 0c c0 e3 87 00 c0 e3 ........#.......
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00000080: 02 00 80 e3 01 0a 80 e3 10 0f 01 ee 5c 49 00 eb ............\I..
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00000090: 98 00 4f e2 5c 10 1f e5 01 00 50 e1 07 00 00 0a ..O.\.....P.....
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000000a0: 64 20 1f e5 5c 30 1f e5 02 20 43 e0 02 20 80 e0 d ..\0... C.. ..
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000000b0: f8 07 b0 e8 f8 07 a1 e8 02 00 50 e1 fb ff ff da ..........P.....
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000000c0: 80 00 1f e5 0c d0 40 e2 80 00 1f e5 80 10 1f e5 ......@.........
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000000d0: 00 20 a0 e3 00 20 80 e5 04 00 80 e2 01 00 50 e1 . ... ........P.
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000000e0: fb ff ff da 04 f0 1f e5 54 46 f0 a7 00 00 00 00 ........TF......
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000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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@endverbatim
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This command works on the whole flash device.
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In our example here the start of the flash contains the U-Boot-v2 code. This
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can also be displayed by using the U-Boot partition:
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@verbatim
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uboot:/ md -b -s /dev/self0
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00000000: 14 00 00 ea 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
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00000010: 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
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00000020: 00 01 f0 a7 60 01 f0 a7 c0 01 f0 a7 20 02 f0 a7 ....`....... ...
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00000030: 80 02 f0 a7 e0 02 f0 a7 40 03 f0 a7 ef be ad de ........@.......
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00000040: 00 00 f0 a7 00 00 f0 a7 00 00 b0 a7 00 20 ae a7 ............. ..
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00000050: 30 89 f1 a7 80 d7 f1 a7 00 00 0f e1 1f 00 c0 e3 0...............
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00000060: d3 00 80 e3 00 f0 29 e1 00 00 a0 e3 17 0f 07 ee ......).........
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00000070: 17 0f 08 ee 10 0f 11 ee 23 0c c0 e3 87 00 c0 e3 ........#.......
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00000080: 02 00 80 e3 01 0a 80 e3 10 0f 01 ee 5c 49 00 eb ............\I..
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00000090: 98 00 4f e2 5c 10 1f e5 01 00 50 e1 07 00 00 0a ..O.\.....P.....
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000000a0: 64 20 1f e5 5c 30 1f e5 02 20 43 e0 02 20 80 e0 d ..\0... C.. ..
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000000b0: f8 07 b0 e8 f8 07 a1 e8 02 00 50 e1 fb ff ff da ..........P.....
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000000c0: 80 00 1f e5 0c d0 40 e2 80 00 1f e5 80 10 1f e5 ......@.........
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000000d0: 00 20 a0 e3 00 20 80 e5 04 00 80 e2 01 00 50 e1 . ... ........P.
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000000e0: fb ff ff da 04 f0 1f e5 54 46 f0 a7 00 00 00 00 ........TF......
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000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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@endverbatim
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Hexdump the first 100 bytes from the environment partition (also in flash):
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@verbatim
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uboot:/ md -b -s /dev/env0
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00000000: 79 ba 8f 79 00 00 00 00 7f 2e 91 a8 8c 00 00 00 y..y............
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00000010: 00 00 00 00 00 00 00 00 4c 36 18 d3 8d c7 a8 67 ........L6.....g
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00000020: 71 00 00 00 0a 00 00 00 2f 62 69 6e 2f 69 6e 69 q......./bin/ini
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00000030: 74 00 00 00 65 74 68 30 2e 65 74 68 61 64 64 72 t...eth0.ethaddr
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00000040: 3d 38 30 3a 38 31 3a 38 32 3a 38 33 3a 38 34 3a =80:81:82:83:84:
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00000050: 38 36 0a 65 74 68 30 2e 73 65 72 76 65 72 69 70 86.eth0.serverip
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00000060: 3d 31 39 32 2e 31 36 38 2e 32 33 2e 32 0a 65 74 =192.168.23.2.et
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00000070: 68 30 2e 6e 65 74 6d 61 73 6b 3d 32 35 35 2e 32 h0.netmask=255.2
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00000080: 35 35 2e 32 35 35 2e 30 0a 65 74 68 30 2e 69 70 55.255.0.eth0.ip
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00000090: 61 64 64 72 3d 31 39 32 2e 31 36 38 2e 32 33 2e addr=192.168.23.
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000000a0: 31 39 37 0a 0a 00 00 00 ff ff ff ff ff ff ff ff 197.............
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000000b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
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000000c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
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000000d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
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000000e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
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000000f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
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@endverbatim
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*/
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