common/cmd_ximg.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2003
   6  * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #if (CONFIG_COMMANDS & CFG_CMD_XIMG)
  28
  29 /*
  30  * Multi Image extract
  31  */
  32 #include <common.h>
  33 #include <command.h>
  34 #include <image.h>
  35 #include <asm/byteorder.h>
  36
  37 int
  38 do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  39 {
  40         ulong addr = load_addr, dest = 0;
  41         ulong data, len, checksum;
  42         ulong *len_ptr;
  43         int i, verify, part = 0;
  44         char pbuf[10], *s;
  45         image_header_t header;
  46
  47         s = getenv("verify");
  48         verify = (s && (*s == 'n')) ? 0 : 1;
  49
  50         if (argc > 1) {
  51                 addr = simple_strtoul(argv[1], NULL, 16);
  52         }
  53         if (argc > 2) {
  54                 part = simple_strtoul(argv[2], NULL, 16);
  55         }
  56         if (argc > 3) {
  57                 dest = simple_strtoul(argv[3], NULL, 16);
  58         }
  59
  60         printf("## Copying from image at %08lx ...\n", addr);
  61
  62         /* Copy header so we can blank CRC field for re-calculation */
  63         memmove(&header, (char *) addr, sizeof (image_header_t));
  64
  65         if (ntohl(header.ih_magic) != IH_MAGIC) {
  66                 printf("Bad Magic Number\n");
  67                 return 1;
  68         }
  69
  70         data = (ulong) & header;
  71         len = sizeof (image_header_t);
  72
  73         checksum = ntohl(header.ih_hcrc);
  74         header.ih_hcrc = 0;
  75
  76         if (crc32(0, (char *) data, len) != checksum) {
  77                 printf("Bad Header Checksum\n");
  78                 return 1;
  79         }
  80 #ifdef DEBUG
  81         print_image_hdr((image_header_t *) addr);
  82 #endif
  83
  84         data = addr + sizeof (image_header_t);
  85         len = ntohl(header.ih_size);
  86
  87         if (header.ih_type != IH_TYPE_MULTI) {
  88                 printf("Wrong Image Type for %s command\n", cmdtp->name);
  89                 return 1;
  90         }
  91
  92         if (header.ih_comp != IH_COMP_NONE) {
  93                 printf("Wrong Compression Type for %s command\n", cmdtp->name);
  94                 return 1;
  95         }
  96
  97         if (verify) {
  98                 printf("   Verifying Checksum ... ");
  99                 if (crc32(0, (char *) data, len) != ntohl(header.ih_dcrc)) {
 100                         printf("Bad Data CRC\n");
 101                         return 1;
 102                 }
 103                 printf("OK\n");
 104         }
 105
 106         len_ptr = (ulong *) data;
 107
 108         data += 4;              /* terminator */
 109         for (i = 0; len_ptr[i]; ++i) {
 110                 data += 4;
 111                 if (argc > 2 && part > i) {
 112                         u_long tail;
 113                         len = ntohl(len_ptr[i]);
 114                         tail = len % 4;
 115                         data += len;
 116                         if (tail) {
 117                                 data += 4 - tail;
 118                         }
 119                 }
 120         }
 121         if (argc > 2 && part >= i) {
 122                 printf("Bad Image Part\n");
 123                 return 1;
 124         }
 125         len = ntohl(len_ptr[part]);
 126
 127         if (argc > 3) {
 128                 memcpy((char *) dest, (char *) data, len);
 129         }
 130
 131         sprintf(pbuf, "%8lx", data);
 132         setenv("fileaddr", pbuf);
 133         sprintf(pbuf, "%8lx", len);
 134         setenv("filesize", pbuf);
 135
 136         return 0;
 137 }
 138
 139 U_BOOT_CMD(imxtract, 4, 1, do_imgextract,
 140            "imxtract- extract a part of a multi-image\n",
 141            "addr part [dest]\n"
 142            "    - extract <part> from image at <addr> and copy to <dest>\n");
 143
 144 #endif  /* CONFIG_COMMANDS & CFG_CMD_XIMG */