LXR uboot/tools/default

   1/*
   2 * (C) Copyright 2008 Semihalf
   3 *
   4 * (C) Copyright 2000-2004
   5 * DENX Software Engineering
   6 * Wolfgang Denk, wd@denx.de
   7 *
   8 * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
   9 *              default_image specific code abstracted from mkimage.c
  10 *              some functions added to address abstraction
  11 *
  12 * All rights reserved.
  13 *
  14 * This program is free software; you can redistribute it and/or
  15 * modify it under the terms of the GNU General Public License as
  16 * published by the Free Software Foundation; either version 2 of
  17 * the License, or (at your option) any later version.
  18 *
  19 * This program is distributed in the hope that it will be useful,
  20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 * GNU General Public License for more details.
  23 *
  24 * You should have received a copy of the GNU General Public License
  25 * along with this program; if not, write to the Free Software
  26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27 * MA 02111-1307 USA
  28 */
  29
  30#include "mkimage.h"
  31#include <image.h>
  32#include <u-boot/crc.h>
  33
  34static image_header_t header;
  35
  36static int image_check_image_types (uint8_t type)
  37{
  38        if ((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT))
  39                return EXIT_SUCCESS;
  40        else
  41                return EXIT_FAILURE;
  42}
  43
  44static int image_check_params (struct mkimage_params *params)
  45{
  46        return  ((params->dflag && (params->fflag || params->lflag)) ||
  47                (params->fflag && (params->dflag || params->lflag)) ||
  48                (params->lflag && (params->dflag || params->fflag)));
  49}
  50
  51static int image_verify_header (unsigned char *ptr, int image_size,
  52                        struct mkimage_params *params)
  53{
  54        uint32_t len;
  55        const unsigned char *data;
  56        uint32_t checksum;
  57        image_header_t header;
  58        image_header_t *hdr = &header;
  59
  60        /*
  61         * create copy of header so that we can blank out the
  62         * checksum field for checking - this can't be done
  63         * on the PROT_READ mapped data.
  64         */
  65        memcpy (hdr, ptr, sizeof(image_header_t));
  66
  67        if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
  68                fprintf (stderr,
  69                        "%s: Bad Magic Number: \"%s\" is no valid image\n",
  70                        params->cmdname, params->imagefile);
  71                return -FDT_ERR_BADMAGIC;
  72        }
  73
  74        data = (const unsigned char *)hdr;
  75        len  = sizeof(image_header_t);
  76
  77        checksum = be32_to_cpu(hdr->ih_hcrc);
  78        hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
  79
  80        if (crc32 (0, data, len) != checksum) {
  81                fprintf (stderr,
  82                        "%s: ERROR: \"%s\" has bad header checksum!\n",
  83                        params->cmdname, params->imagefile);
  84                return -FDT_ERR_BADSTATE;
  85        }
  86
  87        data = (const unsigned char *)ptr + sizeof(image_header_t);
  88        len  = image_size - sizeof(image_header_t) ;
  89
  90        checksum = be32_to_cpu(hdr->ih_dcrc);
  91        if (crc32 (0, data, len) != checksum) {
  92                fprintf (stderr,
  93                        "%s: ERROR: \"%s\" has corrupted data!\n",
  94                        params->cmdname, params->imagefile);
  95                return -FDT_ERR_BADSTRUCTURE;
  96        }
  97        return 0;
  98}
  99
 100static void image_set_header (void *ptr, struct stat *sbuf, int ifd,
 101                                struct mkimage_params *params)
 102{
 103        uint32_t checksum;
 104
 105        image_header_t * hdr = (image_header_t *)ptr;
 106
 107        checksum = crc32 (0,
 108                        (const unsigned char *)(ptr +
 109                                sizeof(image_header_t)),
 110                        sbuf->st_size - sizeof(image_header_t));
 111
 112        /* Build new header */
 113        image_set_magic (hdr, IH_MAGIC);
 114        image_set_time (hdr, sbuf->st_mtime);
 115        image_set_size (hdr, sbuf->st_size - sizeof(image_header_t));
 116        image_set_load (hdr, params->addr);
 117        image_set_ep (hdr, params->ep);
 118        image_set_dcrc (hdr, checksum);
 119        image_set_os (hdr, params->os);
 120        image_set_arch (hdr, params->arch);
 121        image_set_type (hdr, params->type);
 122        image_set_comp (hdr, params->comp);
 123
 124        image_set_name (hdr, params->imagename);
 125
 126        checksum = crc32 (0, (const unsigned char *)hdr,
 127                                sizeof(image_header_t));
 128
 129        image_set_hcrc (hdr, checksum);
 130}
 131
 132/*
 133 * Default image type parameters definition
 134 */
 135static struct image_type_params defimage_params = {
 136        .name = "Default Image support",
 137        .header_size = sizeof(image_header_t),
 138        .hdr = (void*)&header,
 139        .check_image_type = image_check_image_types,
 140        .verify_header = image_verify_header,
 141        .print_header = image_print_contents,
 142        .set_header = image_set_header,
 143        .check_params = image_check_params,
 144};
 145
 146void init_default_image_type (void)
 147{
 148        mkimage_register (&defimage_params);
 149}
 150