152 lines
3.5 KiB
C
152 lines
3.5 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 char *devmem = "/dev/mem";
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static int do_memcmp(int argc, char *argv[])
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{
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loff_t addr1, addr2, count = ~0;
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int mode = O_RWSIZE_1;
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char *sourcefile = devmem;
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char *destfile = devmem;
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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,
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&destfile, NULL) < 0)
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return 1;
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if (optind + 2 > argc)
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return COMMAND_ERROR_USAGE;
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addr1 = strtoull_suffix(argv[optind], NULL, 0);
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addr2 = strtoull_suffix(argv[optind + 1], NULL, 0);
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if (optind + 2 == argc) {
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if (sourcefile == devmem) {
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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 = strtoull_suffix(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((loff_t)RW_BUF_SIZE, count);
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r1 = read(sourcefd, mem_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 (mem_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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BAREBOX_CMD_HELP_START(memcmp)
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BAREBOX_CMD_HELP_TEXT("Compare memory regions specified with ADDR and ADDR2")
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BAREBOX_CMD_HELP_TEXT("of size COUNT bytes. If source is a file COUNT can")
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BAREBOX_CMD_HELP_TEXT("be left unspecified, in which case the whole file is")
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BAREBOX_CMD_HELP_TEXT("compared.")
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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", "source file (default /dev/mem)")
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BAREBOX_CMD_HELP_OPT ("-d FILE", "destination file (default /dev/mem)")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(memcmp)
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.cmd = do_memcmp,
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BAREBOX_CMD_DESC("memory compare")
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BAREBOX_CMD_OPTS("[-bwlsd] ADDR1 ADDR2 COUNT")
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BAREBOX_CMD_GROUP(CMD_GRP_MEM)
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BAREBOX_CMD_HELP(cmd_memcmp_help)
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BAREBOX_CMD_END
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