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