tools/fit_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  *              FIT 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 fit_verify_header (unsigned char *ptr, int image_size,
  37                         struct mkimage_params *params)
  38 {
  39         return fdt_check_header ((void *)ptr);
  40 }
  41
  42 static int fit_check_image_types (uint8_t type)
  43 {
  44         if (type == IH_TYPE_FLATDT)
  45                 return EXIT_SUCCESS;
  46         else
  47                 return EXIT_FAILURE;
  48 }
  49
  50 /**
  51  * fit_handle_file - main FIT file processing function
  52  *
  53  * fit_handle_file() runs dtc to convert .its to .itb, includes
  54  * binary data, updates timestamp property and calculates hashes.
  55  *
  56  * datafile  - .its file
  57  * imagefile - .itb file
  58  *
  59  * returns:
  60  *     only on success, otherwise calls exit (EXIT_FAILURE);
  61  */
  62 static int fit_handle_file (struct mkimage_params *params)
  63 {
  64         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
  65         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
  66         int tfd;
  67         struct stat sbuf;
  68         unsigned char *ptr;
  69
  70         /* Flattened Image Tree (FIT) format  handling */
  71         debug ("FIT format handling\n");
  72
  73         /* call dtc to include binary properties into the tmp file */
  74         if (strlen (params->imagefile) +
  75                 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
  76                 fprintf (stderr, "%s: Image file name (%s) too long, "
  77                                 "can't create tmpfile",
  78                                 params->imagefile, params->cmdname);
  79                 return (EXIT_FAILURE);
  80         }
  81         sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
  82
  83         /* dtc -I dts -O -p 200 datafile > tmpfile */
  84         sprintf (cmd, "%s %s %s > %s",
  85                 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
  86         debug ("Trying to execute \"%s\"\n", cmd);
  87         if (system (cmd) == -1) {
  88                 fprintf (stderr, "%s: system(%s) failed: %s\n",
  89                                 params->cmdname, cmd, strerror(errno));
  90                 unlink (tmpfile);
  91                 return (EXIT_FAILURE);
  92         }
  93
  94         /* load FIT blob into memory */
  95         tfd = open (tmpfile, O_RDWR|O_BINARY);
  96
  97         if (tfd < 0) {
  98                 fprintf (stderr, "%s: Can't open %s: %s\n",
  99                                 params->cmdname, tmpfile, strerror(errno));
 100                 unlink (tmpfile);
 101                 return (EXIT_FAILURE);
 102         }
 103
 104         if (fstat (tfd, &sbuf) < 0) {
 105                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 106                                 params->cmdname, tmpfile, strerror(errno));
 107                 unlink (tmpfile);
 108                 return (EXIT_FAILURE);
 109         }
 110
 111         ptr = mmap (0, sbuf.st_size, PROT_READ|PROT_WRITE, MAP_SHARED,
 112                                 tfd, 0);
 113         if (ptr == MAP_FAILED) {
 114                 fprintf (stderr, "%s: Can't read %s: %s\n",
 115                                 params->cmdname, tmpfile, strerror(errno));
 116                 unlink (tmpfile);
 117                 return (EXIT_FAILURE);
 118         }
 119
 120         /* check if ptr has a valid blob */
 121         if (fdt_check_header (ptr)) {
 122                 fprintf (stderr, "%s: Invalid FIT blob\n", params->cmdname);
 123                 unlink (tmpfile);
 124                 return (EXIT_FAILURE);
 125         }
 126
 127         /* set hashes for images in the blob */
 128         if (fit_set_hashes (ptr)) {
 129                 fprintf (stderr, "%s Can't add hashes to FIT blob",
 130                                 params->cmdname);
 131                 unlink (tmpfile);
 132                 return (EXIT_FAILURE);
 133         }
 134
 135         /* add a timestamp at offset 0 i.e., root  */
 136         if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
 137                 fprintf (stderr, "%s: Can't add image timestamp\n",
 138                                 params->cmdname);
 139                 unlink (tmpfile);
 140                 return (EXIT_FAILURE);
 141         }
 142         debug ("Added timestamp successfully\n");
 143
 144         munmap ((void *)ptr, sbuf.st_size);
 145         close (tfd);
 146
 147         if (rename (tmpfile, params->imagefile) == -1) {
 148                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 149                                 params->cmdname, tmpfile, params->imagefile,
 150                                 strerror (errno));
 151                 unlink (tmpfile);
 152                 unlink (params->imagefile);
 153                 return (EXIT_FAILURE);
 154         }
 155         return (EXIT_SUCCESS);
 156 }
 157
 158 static void fit_set_header (void *ptr, struct stat *sbuf, int ifd,
 159                                 struct mkimage_params *params)
 160 {
 161         uint32_t checksum;
 162
 163         image_header_t * hdr = (image_header_t *)ptr;
 164
 165         checksum = crc32 (0,
 166                         (const unsigned char *)(ptr +
 167                                 sizeof(image_header_t)),
 168                         sbuf->st_size - sizeof(image_header_t));
 169
 170         /* Build new header */
 171         image_set_magic (hdr, IH_MAGIC);
 172         image_set_time (hdr, sbuf->st_mtime);
 173         image_set_size (hdr, sbuf->st_size - sizeof(image_header_t));
 174         image_set_load (hdr, params->addr);
 175         image_set_ep (hdr, params->ep);
 176         image_set_dcrc (hdr, checksum);
 177         image_set_os (hdr, params->os);
 178         image_set_arch (hdr, params->arch);
 179         image_set_type (hdr, params->type);
 180         image_set_comp (hdr, params->comp);
 181
 182         image_set_name (hdr, params->imagename);
 183
 184         checksum = crc32 (0, (const unsigned char *)hdr,
 185                                 sizeof(image_header_t));
 186
 187         image_set_hcrc (hdr, checksum);
 188 }
 189
 190 static int fit_check_params (struct mkimage_params *params)
 191 {
 192         return  ((params->dflag && (params->fflag || params->lflag)) ||
 193                 (params->fflag && (params->dflag || params->lflag)) ||
 194                 (params->lflag && (params->dflag || params->fflag)));
 195 }
 196
 197 static struct image_type_params fitimage_params = {
 198         .name = "FIT Image support",
 199         .header_size = sizeof(image_header_t),
 200         .hdr = (void*)&header,
 201         .verify_header = fit_verify_header,
 202         .print_header = fit_print_contents,
 203         .check_image_type = fit_check_image_types,
 204         .fflag_handle = fit_handle_file,
 205         .set_header = fit_set_header,
 206         .check_params = fit_check_params,
 207 };
 208
 209 void init_fit_image_type (void)
 210 {
 211         mkimage_register (&fitimage_params);
 212 }