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             (type == IH_TYPE_KERNEL_NOLOAD))
  40                 return EXIT_SUCCESS;
  41         else
  42                 return EXIT_FAILURE;
  43 }
  44
  45 static int image_check_params(struct mkimage_params *params)
  46 {
  47         return  ((params->dflag && (params->fflag || params->lflag)) ||
  48                 (params->fflag && (params->dflag || params->lflag)) ||
  49                 (params->lflag && (params->dflag || params->fflag)));
  50 }
  51
  52 static int image_verify_header(unsigned char *ptr, int image_size,
  53                         struct mkimage_params *params)
  54 {
  55         uint32_t len;
  56         const unsigned char *data;
  57         uint32_t checksum;
  58         image_header_t header;
  59         image_header_t *hdr = &header;
  60
  61         /*
  62          * create copy of header so that we can blank out the
  63          * checksum field for checking - this can't be done
  64          * on the PROT_READ mapped data.
  65          */
  66         memcpy(hdr, ptr, sizeof(image_header_t));
  67
  68         if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
  69                 fprintf(stderr,
  70                         "%s: Bad Magic Number: \"%s\" is no valid image\n",
  71                         params->cmdname, params->imagefile);
  72                 return -FDT_ERR_BADMAGIC;
  73         }
  74
  75         data = (const unsigned char *)hdr;
  76         len  = sizeof(image_header_t);
  77
  78         checksum = be32_to_cpu(hdr->ih_hcrc);
  79         hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
  80
  81         if (crc32(0, data, len) != checksum) {
  82                 fprintf(stderr,
  83                         "%s: ERROR: \"%s\" has bad header checksum!\n",
  84                         params->cmdname, params->imagefile);
  85                 return -FDT_ERR_BADSTATE;
  86         }
  87
  88         data = (const unsigned char *)ptr + sizeof(image_header_t);
  89         len  = image_size - sizeof(image_header_t) ;
  90
  91         checksum = be32_to_cpu(hdr->ih_dcrc);
  92         if (crc32(0, data, len) != checksum) {
  93                 fprintf(stderr,
  94                         "%s: ERROR: \"%s\" has corrupted data!\n",
  95                         params->cmdname, params->imagefile);
  96                 return -FDT_ERR_BADSTRUCTURE;
  97         }
  98         return 0;
  99 }
 100
 101 static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
 102                                 struct mkimage_params *params)
 103 {
 104         uint32_t checksum;
 105
 106         image_header_t * hdr = (image_header_t *)ptr;
 107
 108         checksum = crc32(0,
 109                         (const unsigned char *)(ptr +
 110                                 sizeof(image_header_t)),
 111                         sbuf->st_size - sizeof(image_header_t));
 112
 113         /* Build new header */
 114         image_set_magic(hdr, IH_MAGIC);
 115         image_set_time(hdr, sbuf->st_mtime);
 116         image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
 117         image_set_load(hdr, params->addr);
 118         image_set_ep(hdr, params->ep);
 119         image_set_dcrc(hdr, checksum);
 120         image_set_os(hdr, params->os);
 121         image_set_arch(hdr, params->arch);
 122         image_set_type(hdr, params->type);
 123         image_set_comp(hdr, params->comp);
 124
 125         image_set_name(hdr, params->imagename);
 126
 127         checksum = crc32(0, (const unsigned char *)hdr,
 128                                 sizeof(image_header_t));
 129
 130         image_set_hcrc(hdr, checksum);
 131 }
 132
 133 /*
 134  * Default image type parameters definition
 135  */
 136 static struct image_type_params defimage_params = {
 137         .name = "Default Image support",
 138         .header_size = sizeof(image_header_t),
 139         .hdr = (void*)&header,
 140         .check_image_type = image_check_image_types,
 141         .verify_header = image_verify_header,
 142         .print_header = image_print_contents,
 143         .set_header = image_set_header,
 144         .check_params = image_check_params,
 145 };
 146
 147 void init_default_image_type(void)
 148 {
 149         mkimage_register(&defimage_params);
 150 }