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https://github.com/brain-hackers/u-boot-brain
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Add a command to read raw blocks from a partition
Sometimes data is on a block device and within a partition, but not in a particular filesystem. This commands permits reading raw data from a partition. Signed-off-by: Kenneth Waters <kwaters@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
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1
README
1
README
@ -861,6 +861,7 @@ The following options need to be configured:
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CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network
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CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network
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host
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host
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CONFIG_CMD_PORTIO * Port I/O
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CONFIG_CMD_PORTIO * Port I/O
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CONFIG_CMD_READ * Read raw data from partition
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CONFIG_CMD_REGINFO * Register dump
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CONFIG_CMD_REGINFO * Register dump
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CONFIG_CMD_RUN run command in env variable
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CONFIG_CMD_RUN run command in env variable
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CONFIG_CMD_SAVES * save S record dump
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CONFIG_CMD_SAVES * save S record dump
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@ -142,6 +142,7 @@ endif
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COBJS-y += cmd_pcmcia.o
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COBJS-y += cmd_pcmcia.o
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COBJS-$(CONFIG_CMD_PORTIO) += cmd_portio.o
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COBJS-$(CONFIG_CMD_PORTIO) += cmd_portio.o
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COBJS-$(CONFIG_CMD_PXE) += cmd_pxe.o
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COBJS-$(CONFIG_CMD_PXE) += cmd_pxe.o
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COBJS-$(CONFIG_CMD_READ) += cmd_read.o
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COBJS-$(CONFIG_CMD_REGINFO) += cmd_reginfo.o
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COBJS-$(CONFIG_CMD_REGINFO) += cmd_reginfo.o
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COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o
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COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o
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COBJS-$(CONFIG_CMD_SATA) += cmd_sata.o
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COBJS-$(CONFIG_CMD_SATA) += cmd_sata.o
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81
common/cmd_read.c
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81
common/cmd_read.c
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@ -0,0 +1,81 @@
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/*
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* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*/
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#include <common.h>
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#include <command.h>
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#include <part.h>
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int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char *ep;
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block_dev_desc_t *dev_desc = NULL;
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int dev;
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int part = 0;
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disk_partition_t part_info;
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ulong offset = 0u;
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ulong limit = 0u;
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void *addr;
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uint blk;
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uint cnt;
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if (argc != 6) {
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cmd_usage(cmdtp);
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return 1;
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}
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dev = (int)simple_strtoul(argv[2], &ep, 16);
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if (*ep) {
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if (*ep != ':') {
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printf("Invalid block device %s\n", argv[2]);
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return 1;
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}
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part = (int)simple_strtoul(++ep, NULL, 16);
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}
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dev_desc = get_dev(argv[1], dev);
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if (dev_desc == NULL) {
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printf("Block device %s %d not supported\n", argv[1], dev);
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return 1;
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}
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addr = (void *)simple_strtoul(argv[3], NULL, 16);
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blk = simple_strtoul(argv[4], NULL, 16);
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cnt = simple_strtoul(argv[5], NULL, 16);
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if (part != 0) {
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if (get_partition_info(dev_desc, part, &part_info)) {
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printf("Cannot find partition %d\n", part);
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return 1;
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}
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offset = part_info.start;
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limit = part_info.size;
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} else {
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/* Largest address not available in block_dev_desc_t. */
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limit = ~0;
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}
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if (cnt + blk > limit) {
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printf("Read out of range\n");
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return 1;
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}
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if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) {
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printf("Error reading blocks\n");
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return 1;
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}
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return 0;
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}
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U_BOOT_CMD(
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read, 6, 0, do_read,
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"Load binary data from a partition",
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"<interface> <dev[:part]> addr blk# cnt"
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);
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@ -71,6 +71,7 @@
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#define CONFIG_CMD_REGINFO /* Register dump */
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#define CONFIG_CMD_REGINFO /* Register dump */
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#define CONFIG_CMD_REISER /* Reiserfs support */
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#define CONFIG_CMD_REISER /* Reiserfs support */
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#define CONFIG_CMD_RARP /* rarpboot support */
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#define CONFIG_CMD_RARP /* rarpboot support */
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#define CONFIG_CMD_READ /* Read data from partition */
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#define CONFIG_CMD_RUN /* run command in env variable */
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#define CONFIG_CMD_RUN /* run command in env variable */
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#define CONFIG_CMD_SAVEENV /* saveenv */
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#define CONFIG_CMD_SAVEENV /* saveenv */
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#define CONFIG_CMD_SAVES /* save S record dump */
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#define CONFIG_CMD_SAVES /* save S record dump */
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