diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/Makefile | 1 | ||||
| -rw-r--r-- | common/cmd_read.c | 81 |
2 files changed, 82 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile index b3a603209..07a93d1ed 100644 --- a/common/Makefile +++ b/common/Makefile @@ -142,6 +142,7 @@ endif COBJS-y += cmd_pcmcia.o COBJS-$(CONFIG_CMD_PORTIO) += cmd_portio.o COBJS-$(CONFIG_CMD_PXE) += cmd_pxe.o +COBJS-$(CONFIG_CMD_READ) += cmd_read.o COBJS-$(CONFIG_CMD_REGINFO) += cmd_reginfo.o COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o COBJS-$(CONFIG_CMD_SATA) += cmd_sata.o diff --git a/common/cmd_read.c b/common/cmd_read.c new file mode 100644 index 000000000..f0fc9bfe1 --- /dev/null +++ b/common/cmd_read.c @@ -0,0 +1,81 @@ +/* + * 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(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + char *ep; + block_dev_desc_t *dev_desc = NULL; + int dev; + int part = 0; + disk_partition_t 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 = 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 (get_partition_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 block_dev_desc_t. */ + limit = ~0; + } + + if (cnt + blk > limit) { + printf("Read out of range\n"); + return 1; + } + + if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) { + 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" +); |