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- /*
- * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- */
- #include <common.h>
- #include <command.h>
- #include <part.h>
- int do_read(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
- {
- char *ep;
- struct blk_desc *dev_desc = NULL;
- int dev;
- int part = 0;
- struct disk_partition part_info;
- ulong offset = 0u;
- ulong limit = 0u;
- void *addr;
- uint blk;
- uint cnt;
- if (argc != 6) {
- cmd_usage(cmdtp);
- return 1;
- }
- dev = (int)simple_strtoul(argv[2], &ep, 16);
- if (*ep) {
- if (*ep != ':') {
- printf("Invalid block device %s\n", argv[2]);
- return 1;
- }
- part = (int)simple_strtoul(++ep, NULL, 16);
- }
- dev_desc = blk_get_dev(argv[1], dev);
- if (dev_desc == NULL) {
- printf("Block device %s %d not supported\n", argv[1], dev);
- return 1;
- }
- addr = (void *)simple_strtoul(argv[3], NULL, 16);
- blk = simple_strtoul(argv[4], NULL, 16);
- cnt = simple_strtoul(argv[5], NULL, 16);
- if (part != 0) {
- if (part_get_info(dev_desc, part, &part_info)) {
- printf("Cannot find partition %d\n", part);
- return 1;
- }
- offset = part_info.start;
- limit = part_info.size;
- } else {
- /* Largest address not available in struct blk_desc. */
- limit = ~0;
- }
- if (cnt + blk > limit) {
- printf("Read out of range\n");
- return 1;
- }
- if (blk_dread(dev_desc, offset + blk, cnt, addr) != cnt) {
- printf("Error reading blocks\n");
- return 1;
- }
- return 0;
- }
- U_BOOT_CMD(
- read, 6, 0, do_read,
- "Load binary data from a partition",
- "<interface> <dev[:part]> addr blk# cnt"
- );
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