190 lines
4.7 KiB
C
190 lines
4.7 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 memcmp: memory compare command
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*/
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#include <common.h>
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#include <command.h>
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#include <fcntl.h>
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#include <linux/stat.h> /* FIXME */
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#include <fs.h>
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#include <errno.h>
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#include <xfuncs.h> /* for xmalloc */
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#include <malloc.h> /* for free */
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#include <getopt.h>
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static int do_mem_cmp(cmd_tbl_t *cmdtp, int argc, char *argv[])
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{
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ulong addr1, addr2, count = ~0;
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int mode = O_RWSIZE_1;
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char *sourcefile = memory_device;
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char *destfile = memory_device;
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int sourcefd, destfd;
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char *rw_buf1;
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int ret = 1;
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int offset = 0;
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struct stat statbuf;
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if (mem_parse_options(argc, argv, "bwls:d:", &mode, &sourcefile, &destfile) < 0)
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return 1;
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if (optind + 2 > argc) {
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u_boot_cmd_usage(cmdtp);
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return 1;
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}
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addr1 = simple_strtoul(argv[optind], NULL, 0);
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addr2 = simple_strtoul(argv[optind + 1], NULL, 0);
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if (optind + 2 == argc) {
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if (sourcefile == memory_device) {
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printf("source and count not given\n");
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return 1;
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}
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if (stat(sourcefile, &statbuf)) {
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perror("stat");
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return 1;
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}
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count = statbuf.st_size - addr1;
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} else {
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count = simple_strtoul(argv[optind + 2], NULL, 0);
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}
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sourcefd = open_and_lseek(sourcefile, mode | O_RDONLY, addr1);
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if (sourcefd < 0)
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return 1;
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destfd = open_and_lseek(destfile, mode | O_RDONLY, addr2);
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if (destfd < 0) {
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close(sourcefd);
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return 1;
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}
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rw_buf1 = xmalloc(RW_BUF_SIZE);
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while (count > 0) {
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int now, r1, r2, i;
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now = min(RW_BUF_SIZE, count);
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r1 = read(sourcefd, rw_buf, now);
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if (r1 < 0) {
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perror("read");
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goto out;
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}
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r2 = read(destfd, rw_buf1, now);
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if (r2 < 0) {
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perror("read");
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goto out;
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}
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if (r1 != now || r2 != now) {
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printf("regions differ in size\n");
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goto out;
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}
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for (i = 0; i < now; i++) {
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if (rw_buf[i] != rw_buf1[i]) {
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printf("files differ at offset %d\n", offset);
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goto out;
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}
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offset++;
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}
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count -= now;
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}
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printf("OK\n");
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ret = 0;
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out:
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close(sourcefd);
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close(destfd);
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free(rw_buf1);
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return ret;
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}
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static __maybe_unused char cmd_memcmp_help[] =
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"Usage: memcmp [OPTIONS] <addr1> <addr2> <count>\n"
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"\n"
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"options:\n"
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" -b, -w, -l use byte, halfword, or word accesses\n"
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" -s <file> source file (default /dev/mem)\n"
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" -d <file> destination file (default /dev/mem)\n"
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"\n"
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"Compare memory regions specified with addr1 and addr2\n"
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"of size <count> bytes. If source is a file count can\n"
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"be left unspecified in which case the whole file is\n"
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"compared\n";
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U_BOOT_CMD_START(memcmp)
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.maxargs = CONFIG_MAXARGS,
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.cmd = do_mem_cmp,
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.usage = "memory compare",
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U_BOOT_CMD_HELP(cmd_memcmp_help)
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U_BOOT_CMD_END
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/**
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@page mc_command memcmp: compare something with something other
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Usage is: memcmp [OPTIONS] \<addr1> \<addr2> \<count>
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Options are:
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- -s \<file> source file (default /dev/mem)
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- -d \<file> destination file (default /dev/mem)
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- -b access in bytes
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- -w access in halfwords (16bit)
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- -l access in words (32bit)
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Compare memory regions specified with \<addr1> and \<addr2> of size \<count>
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bytes. If source is a file \<count> can be left unspecified in which case the
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whole file is compared.
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@note The access type might be important in some physical I/O areas.
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Usage examples:
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Compare two 64kiB memory areas in CPU's physical address range:
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@verbatim
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uboot:/ memcmp -b 0x400 0xc0000000 0x10000
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@endverbatim
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Compare a file content with a physical memory area content (to check if
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programming the flash memory was successfully):
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@verbatim
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uboot:/ memcmp -b -s /my_file.bin -d /dev/mem 0x0 0xc0000000
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@endverbatim
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Compare two files (also to check if programming the flash memory was
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successfully):
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@verbatim
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uboot:/ memcmp -b -s /my_file.bin -d /dev/nor0.partition1
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@endverbatim
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@note In this case \c my_file.bin could be smaller than the \c nor0.partition1.
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\c memcmp stops to compare when the end of the shorter file ends.
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*/
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