Initial revision
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wdenk
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/*
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* (C) Copyright 2001
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* Kyle Harris, kharris@nexus-tech.net
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* autoscript allows a remote host to download a command file and,
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* optionally, binary data for automatically updating the target. For
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* example, you create a new kernel image and want the user to be
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* able to simply download the image and the machine does the rest.
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* The kernel image is postprocessed with mkimage, which creates an
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* image with a script file prepended. If enabled, autoscript will
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* verify the script and contents of the download and execute the
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* script portion. This would be responsible for erasing flash,
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* copying the new image, and rebooting the machine.
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <image.h>
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#include <malloc.h>
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#include <asm/byteorder.h>
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#include <cmd_boot.h>
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#include <cmd_autoscript.h>
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#if defined(CONFIG_8xx)
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#include <mpc8xx.h>
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#endif
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#ifdef CFG_HUSH_PARSER
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#include <hush.h>
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#endif
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#if defined(CONFIG_AUTOSCRIPT) || \
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(CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
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extern image_header_t header; /* from cmd_bootm.c */
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int
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autoscript (ulong addr)
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{
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ulong crc, data, len;
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image_header_t *hdr = &header;
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ulong *len_ptr;
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char *cmd;
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int rcode = 0;
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int verify;
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cmd = getenv ("verify");
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verify = (cmd && (*cmd == 'n')) ? 0 : 1;
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memmove (hdr, (char *)addr, sizeof(image_header_t));
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if (ntohl(hdr->ih_magic) != IH_MAGIC) {
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printf ("Bad magic number\n");
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return 1;
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}
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crc = ntohl(hdr->ih_hcrc);
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hdr->ih_hcrc = 0;
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len = sizeof (image_header_t);
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data = (ulong)hdr;
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if (crc32(0, (char *)data, len) != crc) {
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printf ("Bad header crc\n");
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return 1;
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}
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data = addr + sizeof(image_header_t);
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len = ntohl(hdr->ih_size);
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if (verify) {
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if (crc32(0, (char *)data, len) != ntohl(hdr->ih_dcrc)) {
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printf ("Bad data crc\n");
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return 1;
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}
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}
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if (hdr->ih_type != IH_TYPE_SCRIPT) {
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printf ("Bad image type\n");
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return 1;
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}
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/* get length of script */
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len_ptr = (ulong *)data;
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if ((len = ntohl(*len_ptr)) == 0) {
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printf ("Empty Script\n");
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return 1;
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}
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debug ("** Script length: %d\n", len);
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if ((cmd = malloc (len + 1)) == NULL) {
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return 1;
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}
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while (*len_ptr++);
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/* make sure cmd is null terminated */
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memmove (cmd, (char *)len_ptr, len);
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*(cmd + len) = 0;
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#ifdef CFG_HUSH_PARSER
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rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON);
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#else
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{
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char *line = cmd;
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char *next = cmd;
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/*
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* break into individual lines,
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* and execute each line;
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* terminate on error.
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*/
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while (*next) {
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if (*next == '\n') {
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*next = '\0';
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/* run only non-empty commands */
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if ((next - line) > 1) {
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debug ("** exec: \"%s\"\n",
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line);
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if (run_command (line, 0) < 0) {
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rcode = 1;
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break;
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}
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}
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line = next + 1;
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}
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++next;
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}
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}
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#endif
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free (cmd);
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return rcode;
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}
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#endif /* CONFIG_AUTOSCRIPT || CFG_CMD_AUTOSCRIPT */
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#if (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
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int
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do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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ulong addr;
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int rcode;
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if (argc < 2) {
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addr = CFG_LOAD_ADDR;
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} else {
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addr = simple_strtoul (argv[1],0,16);
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}
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printf ("## Executing script at %08lx\n",addr);
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rcode = autoscript (addr);
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return rcode;
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}
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#endif /* CFG_CMD_AUTOSCRIPT */
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