/* * Copyright (c) 2011 Sascha Hauer , Pengutronix * * 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 version 2 * as published by the Free Software Foundation. * * 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. * */ /* * Memory Functions * * Copied from FADS ROM, Dan Malek (dmalek@jlc.net) */ #include #include #include #include #include #include #include #include #include #include #include #include static char *devmem = "/dev/mem"; static int do_memcmp(int argc, char *argv[]) { loff_t addr1, addr2, count = ~0; int mode = O_RWSIZE_1; char *sourcefile = devmem; char *destfile = devmem; int sourcefd, destfd; char *buf, *source_data, *dest_data; int ret = 1; int offset = 0; struct stat statbuf; if (mem_parse_options(argc, argv, "bwlqs:d:", &mode, &sourcefile, &destfile, NULL) < 0) return 1; if (optind + 2 > argc) return COMMAND_ERROR_USAGE; addr1 = strtoull_suffix(argv[optind], NULL, 0); addr2 = strtoull_suffix(argv[optind + 1], NULL, 0); if (optind + 2 == argc) { if (sourcefile == devmem) { printf("source and count not given\n"); return 1; } if (stat(sourcefile, &statbuf)) { perror("stat"); return 1; } count = statbuf.st_size - addr1; } else { count = strtoull_suffix(argv[optind + 2], NULL, 0); } sourcefd = open_and_lseek(sourcefile, mode | O_RDONLY, addr1); if (sourcefd < 0) return 1; destfd = open_and_lseek(destfile, mode | O_RDONLY, addr2); if (destfd < 0) { close(sourcefd); return 1; } buf = xmalloc(RW_BUF_SIZE + RW_BUF_SIZE); source_data = buf; dest_data = buf + RW_BUF_SIZE; while (count > 0) { int now, r1, r2, i; now = min((loff_t)RW_BUF_SIZE, count); r1 = read_full(sourcefd, source_data, now); if (r1 < 0) { perror("read"); goto out; } r2 = read_full(destfd, dest_data, now); if (r2 < 0) { perror("read"); goto out; } if (r1 != now || r2 != now) { printf("regions differ in size\n"); goto out; } for (i = 0; i < now; i++) { if (source_data[i] != dest_data[i]) { printf("files differ at offset %d\n", offset); goto out; } offset++; } count -= now; } printf("OK\n"); ret = 0; out: close(sourcefd); close(destfd); free(buf); return ret; } BAREBOX_CMD_HELP_START(memcmp) BAREBOX_CMD_HELP_TEXT("Compare memory regions specified with ADDR1 and ADDR2") BAREBOX_CMD_HELP_TEXT("of size COUNT bytes. If source is a file, COUNT can") BAREBOX_CMD_HELP_TEXT("be left unspecified, in which case the whole file is") BAREBOX_CMD_HELP_TEXT("compared.") BAREBOX_CMD_HELP_TEXT("") BAREBOX_CMD_HELP_TEXT("Options:") BAREBOX_CMD_HELP_OPT ("-b", "byte access") BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)") BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)") BAREBOX_CMD_HELP_OPT ("-q", "quad access (64 bit)") BAREBOX_CMD_HELP_OPT ("-s FILE", "source file (default /dev/mem)") BAREBOX_CMD_HELP_OPT ("-d FILE", "destination file (default /dev/mem)") BAREBOX_CMD_HELP_END BAREBOX_CMD_START(memcmp) .cmd = do_memcmp, BAREBOX_CMD_DESC("memory compare") BAREBOX_CMD_OPTS("[-bwlsd] ADDR1 ADDR2 COUNT") BAREBOX_CMD_GROUP(CMD_GRP_MEM) BAREBOX_CMD_HELP(cmd_memcmp_help) BAREBOX_CMD_END