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 int mmap_fdt(struct mkimage_params *params, const char *fname, void **blobp,
  51                 struct stat *sbuf)
  52 {
  53         void *ptr;
  54         int fd;
  55
  56         /* Load FIT blob into memory (we need to write hashes/signatures) */
  57         fd = open(fname, O_RDWR | O_BINARY);
  58
  59         if (fd < 0) {
  60                 fprintf(stderr, "%s: Can't open %s: %s\n",
  61                         params->cmdname, fname, strerror(errno));
  62                 unlink(fname);
  63                 return -1;
  64         }
  65
  66         if (fstat(fd, sbuf) < 0) {
  67                 fprintf(stderr, "%s: Can't stat %s: %s\n",
  68                         params->cmdname, fname, strerror(errno));
  69                 unlink(fname);
  70                 return -1;
  71         }
  72
  73         ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  74         if (ptr == MAP_FAILED) {
  75                 fprintf(stderr, "%s: Can't read %s: %s\n",
  76                         params->cmdname, fname, strerror(errno));
  77                 unlink(fname);
  78                 return -1;
  79         }
  80
  81         /* check if ptr has a valid blob */
  82         if (fdt_check_header(ptr)) {
  83                 fprintf(stderr, "%s: Invalid FIT blob\n", params->cmdname);
  84                 unlink(fname);
  85                 return -1;
  86         }
  87
  88         *blobp = ptr;
  89         return fd;
  90 }
  91
  92 /**
  93  * fit_handle_file - main FIT file processing function
  94  *
  95  * fit_handle_file() runs dtc to convert .its to .itb, includes
  96  * binary data, updates timestamp property and calculates hashes.
  97  *
  98  * datafile  - .its file
  99  * imagefile - .itb file
 100  *
 101  * returns:
 102  *     only on success, otherwise calls exit (EXIT_FAILURE);
 103  */
 104 static int fit_handle_file (struct mkimage_params *params)
 105 {
 106         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
 107         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
 108         int tfd;
 109         struct stat sbuf;
 110         void *ptr;
 111
 112         /* Flattened Image Tree (FIT) format  handling */
 113         debug ("FIT format handling\n");
 114
 115         /* call dtc to include binary properties into the tmp file */
 116         if (strlen (params->imagefile) +
 117                 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
 118                 fprintf (stderr, "%s: Image file name (%s) too long, "
 119                                 "can't create tmpfile",
 120                                 params->imagefile, params->cmdname);
 121                 return (EXIT_FAILURE);
 122         }
 123         sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
 124
 125         /* dtc -I dts -O dtb -p 500 datafile > tmpfile */
 126         sprintf (cmd, "%s %s %s > %s",
 127                 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
 128         debug ("Trying to execute \"%s\"\n", cmd);
 129         if (system (cmd) == -1) {
 130                 fprintf (stderr, "%s: system(%s) failed: %s\n",
 131                                 params->cmdname, cmd, strerror(errno));
 132                 goto err_system;
 133         }
 134
 135         tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf);
 136         if (tfd < 0)
 137                 goto err_mmap;
 138
 139         /* set hashes for images in the blob */
 140         if (fit_add_verification_data(NULL, NULL, ptr, NULL, 0)) {
 141                 fprintf (stderr, "%s Can't add hashes to FIT blob",
 142                                 params->cmdname);
 143                 goto err_add_hashes;
 144         }
 145
 146         /* add a timestamp at offset 0 i.e., root  */
 147         if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
 148                 fprintf (stderr, "%s: Can't add image timestamp\n",
 149                                 params->cmdname);
 150                 goto err_add_timestamp;
 151         }
 152         debug ("Added timestamp successfully\n");
 153
 154         munmap ((void *)ptr, sbuf.st_size);
 155         close (tfd);
 156
 157         if (rename (tmpfile, params->imagefile) == -1) {
 158                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 159                                 params->cmdname, tmpfile, params->imagefile,
 160                                 strerror (errno));
 161                 unlink (tmpfile);
 162                 unlink (params->imagefile);
 163                 return (EXIT_FAILURE);
 164         }
 165         return (EXIT_SUCCESS);
 166
 167 err_add_timestamp:
 168 err_add_hashes:
 169         munmap(ptr, sbuf.st_size);
 170 err_mmap:
 171 err_system:
 172         unlink(tmpfile);
 173         return -1;
 174 }
 175
 176 static int fit_check_params (struct mkimage_params *params)
 177 {
 178         return  ((params->dflag && (params->fflag || params->lflag)) ||
 179                 (params->fflag && (params->dflag || params->lflag)) ||
 180                 (params->lflag && (params->dflag || params->fflag)));
 181 }
 182
 183 static struct image_type_params fitimage_params = {
 184         .name = "FIT Image support",
 185         .header_size = sizeof(image_header_t),
 186         .hdr = (void*)&header,
 187         .verify_header = fit_verify_header,
 188         .print_header = fit_print_contents,
 189         .check_image_type = fit_check_image_types,
 190         .fflag_handle = fit_handle_file,
 191         .set_header = NULL,     /* FIT images use DTB header */
 192         .check_params = fit_check_params,
 193 };
 194
 195 void init_fit_image_type (void)
 196 {
 197         mkimage_register (&fitimage_params);
 198 }