/* * (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 int autoscript (ulong addr, const char *fit_uname) { ulong len; image_header_t *hdr; ulong *data; char *cmd; int rcode = 0; int verify; #if defined(CONFIG_FIT) const void* fit_hdr; int noffset; const void *fit_data; size_t fit_len; #endif verify = getenv_yesno ("verify"); switch (genimg_get_format ((void *)addr)) { case IMAGE_FORMAT_LEGACY: hdr = (image_header_t *)addr; if (!image_check_magic (hdr)) { puts ("Bad magic number\n"); return 1; } if (!image_check_hcrc (hdr)) { puts ("Bad header crc\n"); return 1; } if (verify) { if (!image_check_dcrc (hdr)) { puts ("Bad data crc\n"); return 1; } } if (!image_check_type (hdr, IH_TYPE_SCRIPT)) { puts ("Bad image type\n"); return 1; } /* get length of script */ data = (ulong *)image_get_data (hdr); if ((len = uimage_to_cpu (*data)) == 0) { puts ("Empty Script\n"); return 1; } /* * scripts are just multi-image files with one component, seek * past the zero-terminated sequence of image lengths to get * to the actual image data */ while (*data++); break; #if defined(CONFIG_FIT) case IMAGE_FORMAT_FIT: if (fit_uname == NULL) { puts ("No FIT subimage unit name\n"); return 1; } fit_hdr = (const void *)addr; if (!fit_check_format (fit_hdr)) { puts ("Bad FIT image format\n"); return 1; } /* get script component image node offset */ noffset = fit_image_get_node (fit_hdr, fit_uname); if (noffset < 0) { printf ("Can't find '%s' FIT subimage\n", fit_uname); return 1; } if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) { puts ("Not a image image\n"); return 1; } /* verify integrity */ if (verify) { if (!fit_image_check_hashes (fit_hdr, noffset)) { puts ("Bad Data Hash\n"); return 1; } } /* get script subimage data address and length */ if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) { puts ("Could not find script subimage data\n"); return 1; } data = (ulong *)fit_data; len = (ulong)fit_len; break; #endif default: puts ("Wrong image format for autoscript\n"); return 1; } debug ("** Script length: %ld\n", len); if ((cmd = malloc (len + 1)) == NULL) { return 1; } /* make sure cmd is null terminated */ memmove (cmd, (char *)data, 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; } /**************************************************/ #if defined(CONFIG_CMD_AUTOSCRIPT) int do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { ulong addr; int rcode; const char *fit_uname = NULL; /* Find script image */ if (argc < 2) { addr = CFG_LOAD_ADDR; debug ("* autoscr: default load address = 0x%08lx\n", addr); #if defined(CONFIG_FIT) } else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) { debug ("* autoscr: subimage '%s' from FIT image at 0x%08lx\n", fit_uname, addr); #endif } else { addr = simple_strtoul(argv[1], NULL, 16); debug ("* autoscr: cmdline image address = 0x%08lx\n", addr); } printf ("## Executing script at %08lx\n", addr); rcode = autoscript (addr, fit_uname); return rcode; } 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" #if defined(CONFIG_FIT) "For FIT format uImage addr must include subimage\n" "unit name in the form of addr:<subimg_uname>\n" #endif ); #endif