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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 <mapmem.h>
#include <part.h>
int do_read(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
struct blk_desc *dev_desc = NULL;
struct disk_partition part_info;
ulong offset, limit;
void *addr;
uint blk;
uint cnt;
int part;
if (argc != 6) {
cmd_usage(cmdtp);
return 1;
}
part = part_get_info_by_dev_and_name_or_num(argv[1], argv[2],
&dev_desc, &part_info, 1);
if (part < 0)
return 1;
addr = map_sysmem(hextoul(argv[3], NULL), 0);
blk = hextoul(argv[4], NULL);
cnt = hextoul(argv[5], NULL);
if (part > 0) {
offset = part_info.start;
limit = part_info.size;
} else {
/* Largest address not available in struct blk_desc. */
offset = 0;
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|#partname]> addr blk# cnt"
);
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