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, destfd = 0; 109 void *dest_blob = NULL; 110 struct stat sbuf; 111 void *ptr; 112 off_t destfd_size = 0; 113 114 /* Flattened Image Tree (FIT) format handling */ 115 debug ("FIT format handling\n"); 116 117 /* call dtc to include binary properties into the tmp file */ 118 if (strlen (params->imagefile) + 119 strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) { 120 fprintf (stderr, "%s: Image file name (%s) too long, " 121 "can't create tmpfile", 122 params->imagefile, params->cmdname); 123 return (EXIT_FAILURE); 124 } 125 sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX); 126 127 /* We either compile the source file, or use the existing FIT image */ 128 if (params->datafile) { 129 /* dtc -I dts -O dtb -p 500 datafile > tmpfile */ 130 snprintf(cmd, sizeof(cmd), "%s %s %s > %s", 131 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile); 132 debug("Trying to execute \"%s\"\n", cmd); 133 } else { 134 snprintf(cmd, sizeof(cmd), "cp %s %s", 135 params->imagefile, tmpfile); 136 } 137 if (system (cmd) == -1) { 138 fprintf (stderr, "%s: system(%s) failed: %s\n", 139 params->cmdname, cmd, strerror(errno)); 140 goto err_system; 141 } 142 143 if (params->keydest) { 144 destfd = mmap_fdt(params, params->keydest, &dest_blob, &sbuf); 145 if (destfd < 0) 146 goto err_keydest; 147 destfd_size = sbuf.st_size; 148 } 149 150 tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf); 151 if (tfd < 0) 152 goto err_mmap; 153 154 /* set hashes for images in the blob */ 155 if (fit_add_verification_data(params->keydir, 156 dest_blob, ptr, params->comment, 157 params->require_keys)) { 158 fprintf(stderr, "%s Can't add hashes to FIT blob\n", 159 params->cmdname); 160 goto err_add_hashes; 161 } 162 163 /* for first image creation, add a timestamp at offset 0 i.e., root */ 164 if (params->datafile && fit_set_timestamp(ptr, 0, sbuf.st_mtime)) { 165 fprintf (stderr, "%s: Can't add image timestamp\n", 166 params->cmdname); 167 goto err_add_timestamp; 168 } 169 debug ("Added timestamp successfully\n"); 170 171 munmap ((void *)ptr, sbuf.st_size); 172 close (tfd); 173 if (dest_blob) { 174 munmap(dest_blob, destfd_size); 175 close(destfd); 176 } 177 178 if (rename (tmpfile, params->imagefile) == -1) { 179 fprintf (stderr, "%s: Can't rename %s to %s: %s\n", 180 params->cmdname, tmpfile, params->imagefile, 181 strerror (errno)); 182 unlink (tmpfile); 183 unlink (params->imagefile); 184 return (EXIT_FAILURE); 185 } 186 return (EXIT_SUCCESS); 187 188 err_add_timestamp: 189 err_add_hashes: 190 munmap(ptr, sbuf.st_size); 191 err_mmap: 192 if (dest_blob) 193 munmap(dest_blob, destfd_size); 194 err_keydest: 195 err_system: 196 unlink(tmpfile); 197 return -1; 198 } 199 200 static int fit_check_params (struct mkimage_params *params) 201 { 202 return ((params->dflag && (params->fflag || params->lflag)) || 203 (params->fflag && (params->dflag || params->lflag)) || 204 (params->lflag && (params->dflag || params->fflag))); 205 } 206 207 static struct image_type_params fitimage_params = { 208 .name = "FIT Image support", 209 .header_size = sizeof(image_header_t), 210 .hdr = (void*)&header, 211 .verify_header = fit_verify_header, 212 .print_header = fit_print_contents, 213 .check_image_type = fit_check_image_types, 214 .fflag_handle = fit_handle_file, 215 .set_header = NULL, /* FIT images use DTB header */ 216 .check_params = fit_check_params, 217 }; 218 219 void init_fit_image_type (void) 220 { 221 mkimage_register (&fitimage_params); 222 } 223