tools/default_image.c

   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
  34 static image_header_t header;
  35
  36 static 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
  44 static 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
  51 static 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
 100 static 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  */
 135 static 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
 146 void init_default_image_type (void)
 147 {
 148         mkimage_register (&defimage_params);
 149 }