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authorJuergen Beisert <j.beisert@pengutronix.de>2007-11-09 21:13:55 +0100
committerJuergen Beisert <j.beisert@pengutronix.de>2007-11-12 16:28:23 +0100
commitd59c600c656d08410ea862c582fbd77432c3ca47 (patch)
tree6c03b005910d262d7740348dae648c2cdfc7fe2e /commands/md.c
parent57cae4e82669748f94fad4d741c3fcf9cde128ac (diff)
downloadbarebox-d59c600c656d08410ea862c582fbd77432c3ca47.tar.gz
separating memory commands
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Diffstat (limited to 'commands/md.c')
-rw-r--r--commands/md.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/commands/md.c b/commands/md.c
new file mode 100644
index 0000000..31d29d4
--- /dev/null
+++ b/commands/md.c
@@ -0,0 +1,298 @@
+/*
+ * (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 md: memory display 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>
+
+/* Memory Display
+ *
+ * Syntax:
+ * md{.b, .w, .l} {addr} {len}
+ */
+#define DISP_LINE_LEN 16
+
+static int memory_display(char *addr, ulong offs, ulong nbytes, int size)
+{
+ ulong linebytes, i;
+ u_char *cp;
+
+ /* Print the lines.
+ *
+ * We buffer all read data, so we can make sure data is read only
+ * once, and all accesses are with the specified bus width.
+ */
+ do {
+ char linebuf[DISP_LINE_LEN];
+ uint *uip = (uint *)linebuf;
+ ushort *usp = (ushort *)linebuf;
+ u_char *ucp = (u_char *)linebuf;
+
+ printf("%08lx:", offs);
+ linebytes = (nbytes>DISP_LINE_LEN)?DISP_LINE_LEN:nbytes;
+
+ for (i=0; i<linebytes; i+= size) {
+ if (size == 4) {
+ printf(" %08x", (*uip++ = *((uint *)addr)));
+ } else if (size == 2) {
+ printf(" %04x", (*usp++ = *((ushort *)addr)));
+ } else {
+ printf(" %02x", (*ucp++ = *((u_char *)addr)));
+ }
+ addr += size;
+ offs += size;
+ }
+
+ puts (" ");
+ cp = (u_char *)linebuf;
+ for (i=0; i<linebytes; i++) {
+ if ((*cp < 0x20) || (*cp > 0x7e))
+ putchar('.');
+ else
+ printf("%c", *cp);
+ cp++;
+ }
+ putchar('\n');
+ nbytes -= linebytes;
+ if (ctrlc()) {
+ return -EINTR;
+ }
+ } while (nbytes > 0);
+
+ return 0;
+}
+
+static int do_mem_md(cmd_tbl_t *cmdtp, int argc, char *argv[])
+{
+ ulong start = 0, size = 0x100;
+ int r, now;
+ int ret = 0;
+ int fd;
+ char *filename = memory_device;
+ int mode = O_RWSIZE_4;
+
+ errno = 0;
+ if (mem_parse_options(argc, argv, "bwls:", &mode, &filename, NULL) < 0)
+ return 1;
+
+ if (optind < argc) {
+ if (parse_area_spec(argv[optind], &start, &size)) {
+ printf("could not parse: %s\n", argv[optind]);
+ return 1;
+ }
+ if (size == ~0)
+ size = 0x100;
+ }
+
+ fd = open_and_lseek(filename, mode | O_RDONLY, start);
+ if (fd < 0)
+ return 1;
+
+ do {
+ now = min(size, RW_BUF_SIZE);
+ r = read(fd, rw_buf, now);
+ if (r < 0) {
+ perror("read");
+ goto out;
+ }
+ if (!r)
+ goto out;
+
+ if ((ret = memory_display(rw_buf, start, r, mode >> O_RWSIZE_SHIFT)))
+ goto out;
+
+ start += r;
+ size -= r;
+ } while (size);
+
+out:
+ close(fd);
+
+ return errno;
+}
+
+static __maybe_unused char cmd_md_help[] =
+"Usage md [OPTIONS] <region>\n"
+"display (hexdump) a memory region.\n"
+"options:\n"
+" -s <file> display file (default /dev/mem)\n"
+" -d <file> write file (default /dev/mem)\n"
+" -b output in bytes\n"
+" -w output in halfwords (16bit)\n"
+" -l output in words (32bit)\n"
+"\n"
+"Memory regions:\n"
+"Memory regions can be specified in two different forms: start+size\n"
+"or start-end, If <start> is ommitted it defaults to 0. If end is ommited it\n"
+"defaults to the end of the device, except for interactive commands like md\n"
+"and mw for which it defaults to 0x100.\n"
+"Sizes can be specified as decimal, or if prefixed with 0x as hexadecimal.\n"
+"an optional suffix of k, M or G is for kibibytes, Megabytes or Gigabytes,\n"
+"respectively\n";
+
+
+U_BOOT_CMD_START(md)
+ .maxargs = CONFIG_MAXARGS,
+ .cmd = do_mem_md,
+ .usage = "memory display",
+ U_BOOT_CMD_HELP(cmd_md_help)
+U_BOOT_CMD_END
+
+/**
+@page md_command md: display (hexdump) something
+
+Usage is: md [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
+
+\b Examples
+
+Hexdump 100 byes from the fixed physical address 0x400:
+@verbatim
+uboot:/ md -b 0x400
+00000400: 1d 1d 04 1a 53 49 00 e0 01 38 8a 8b d2 0b 02 d1 ....SI...8......
+00000410: 00 28 f9 d1 01 e0 00 28 0b d1 6a 20 6b 46 18 70 .(.....(..j kF.p
+00000420: 02 f0 ea f8 6b 46 58 70 00 98 01 21 00 f0 f9 f8 ....kFXp...!....
+00000430: 20 e0 4d 4d 1e e0 48 4d 1c e0 80 07 80 0f 00 25 .MM..HM.......%
+00000440: c6 1c 3b 48 41 6a 04 22 11 43 41 62 81 69 0f 22 ..;HAj.".CAb.i."
+00000450: 12 03 91 43 09 22 12 03 89 18 81 61 ff 20 00 f0 ...C.".....a. ..
+00000460: 17 fa 01 28 06 d1 30 1c 00 f0 7c fa 01 28 01 d1 ...(..0...|..(..
+00000470: 1b 25 ed 06 00 2d 35 d0 02 2c 01 95 05 d0 03 2c .%...-5..,.....,
+00000480: 03 d0 04 2c 01 d0 07 2c 06 d1 01 20 80 02 29 18 ...,...,... ..).
+00000490: 04 30 28 18 01 22 05 e0 01 20 00 03 29 18 04 30 .0(.."... ..)..0
+000004a0: 28 18 00 22 6b 46 5b 7a 08 2b 10 d0 00 92 02 1c (.."kF[z.+......
+000004b0: 01 23 01 a8 ff f7 4e fe 6b 46 02 90 18 7a f0 28 .#....N.kF...z.(
+000004c0: 0d d0 02 98 00 21 00 f0 ac f8 04 e0 0a e0 6b 46 .....!........kF
+000004d0: 18 7a f0 28 03 d0 6b 46 58 7a 01 28 02 d1 01 98 .z.(..kFXz.(....
+000004e0: 02 f0 4a fb ff f7 17 ff fe bc 08 bc 18 47 38 b5 ..J..........G8.
+000004f0: 04 1c 0a 48 0d 1c 40 68 00 90 02 f0 7d f8 08 28 ...H..@h....}..(
+@endverbatim
+
+Hexdump words from fixed physical address 0x000 up to 0x00f:
+@verbatim
+uboot:/ md -w 0x000-0x00f
+00000000: f00c e59f f11c e51f f11c e51f f11c e51f ................
+@endverbatim
+
+The examples above are using the generic \c /dev/mem device. But the \c md
+command can operate on any device. With the \c -s \c \<device> parameter you
+can give a different device to operate on.
+
+To access the flash memory you must not worry about where it is located in
+CPU's address space (this would be reqired when the \c /dev/mem is in use).
+
+Instead let \c md operate on the flash device itself. Or on partitions
+(devices on top of devices).
+
+Hexdump 100 bytes from the start of the flash memory:
+@verbatim
+uboot:/ md -b -s /dev/nor0
+00000000: 14 00 00 ea 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
+00000010: 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
+00000020: 00 01 f0 a7 60 01 f0 a7 c0 01 f0 a7 20 02 f0 a7 ....`....... ...
+00000030: 80 02 f0 a7 e0 02 f0 a7 40 03 f0 a7 ef be ad de ........@.......
+00000040: 00 00 f0 a7 00 00 f0 a7 00 00 b0 a7 00 20 ae a7 ............. ..
+00000050: 30 89 f1 a7 80 d7 f1 a7 00 00 0f e1 1f 00 c0 e3 0...............
+00000060: d3 00 80 e3 00 f0 29 e1 00 00 a0 e3 17 0f 07 ee ......).........
+00000070: 17 0f 08 ee 10 0f 11 ee 23 0c c0 e3 87 00 c0 e3 ........#.......
+00000080: 02 00 80 e3 01 0a 80 e3 10 0f 01 ee 5c 49 00 eb ............\I..
+00000090: 98 00 4f e2 5c 10 1f e5 01 00 50 e1 07 00 00 0a ..O.\.....P.....
+000000a0: 64 20 1f e5 5c 30 1f e5 02 20 43 e0 02 20 80 e0 d ..\0... C.. ..
+000000b0: f8 07 b0 e8 f8 07 a1 e8 02 00 50 e1 fb ff ff da ..........P.....
+000000c0: 80 00 1f e5 0c d0 40 e2 80 00 1f e5 80 10 1f e5 ......@.........
+000000d0: 00 20 a0 e3 00 20 80 e5 04 00 80 e2 01 00 50 e1 . ... ........P.
+000000e0: fb ff ff da 04 f0 1f e5 54 46 f0 a7 00 00 00 00 ........TF......
+000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+@endverbatim
+This command works on the whole flash device.
+
+In our example here the start of the flash contains the U-Boot-v2 code. This
+can also be displayed by using the U-Boot partition:
+
+@verbatim
+uboot:/ md -b -s /dev/self0
+00000000: 14 00 00 ea 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
+00000010: 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 ................
+00000020: 00 01 f0 a7 60 01 f0 a7 c0 01 f0 a7 20 02 f0 a7 ....`....... ...
+00000030: 80 02 f0 a7 e0 02 f0 a7 40 03 f0 a7 ef be ad de ........@.......
+00000040: 00 00 f0 a7 00 00 f0 a7 00 00 b0 a7 00 20 ae a7 ............. ..
+00000050: 30 89 f1 a7 80 d7 f1 a7 00 00 0f e1 1f 00 c0 e3 0...............
+00000060: d3 00 80 e3 00 f0 29 e1 00 00 a0 e3 17 0f 07 ee ......).........
+00000070: 17 0f 08 ee 10 0f 11 ee 23 0c c0 e3 87 00 c0 e3 ........#.......
+00000080: 02 00 80 e3 01 0a 80 e3 10 0f 01 ee 5c 49 00 eb ............\I..
+00000090: 98 00 4f e2 5c 10 1f e5 01 00 50 e1 07 00 00 0a ..O.\.....P.....
+000000a0: 64 20 1f e5 5c 30 1f e5 02 20 43 e0 02 20 80 e0 d ..\0... C.. ..
+000000b0: f8 07 b0 e8 f8 07 a1 e8 02 00 50 e1 fb ff ff da ..........P.....
+000000c0: 80 00 1f e5 0c d0 40 e2 80 00 1f e5 80 10 1f e5 ......@.........
+000000d0: 00 20 a0 e3 00 20 80 e5 04 00 80 e2 01 00 50 e1 . ... ........P.
+000000e0: fb ff ff da 04 f0 1f e5 54 46 f0 a7 00 00 00 00 ........TF......
+000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+@endverbatim
+
+Hexdump the first 100 bytes from the environment partition (also in flash):
+@verbatim
+uboot:/ md -b -s /dev/env0
+00000000: 79 ba 8f 79 00 00 00 00 7f 2e 91 a8 8c 00 00 00 y..y............
+00000010: 00 00 00 00 00 00 00 00 4c 36 18 d3 8d c7 a8 67 ........L6.....g
+00000020: 71 00 00 00 0a 00 00 00 2f 62 69 6e 2f 69 6e 69 q......./bin/ini
+00000030: 74 00 00 00 65 74 68 30 2e 65 74 68 61 64 64 72 t...eth0.ethaddr
+00000040: 3d 38 30 3a 38 31 3a 38 32 3a 38 33 3a 38 34 3a =80:81:82:83:84:
+00000050: 38 36 0a 65 74 68 30 2e 73 65 72 76 65 72 69 70 86.eth0.serverip
+00000060: 3d 31 39 32 2e 31 36 38 2e 32 33 2e 32 0a 65 74 =192.168.23.2.et
+00000070: 68 30 2e 6e 65 74 6d 61 73 6b 3d 32 35 35 2e 32 h0.netmask=255.2
+00000080: 35 35 2e 32 35 35 2e 30 0a 65 74 68 30 2e 69 70 55.255.0.eth0.ip
+00000090: 61 64 64 72 3d 31 39 32 2e 31 36 38 2e 32 33 2e addr=192.168.23.
+000000a0: 31 39 37 0a 0a 00 00 00 ff ff ff ff ff ff ff ff 197.............
+000000b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
+000000c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
+000000d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
+000000e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
+000000f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
+@endverbatim
+*/