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 /* dtc -I dts -O dtb -p 500 datafile > tmpfile */ 128 sprintf (cmd, "%s %s %s > %s", 129 MKIMAGE_DTC, params->dtc, params->datafile, tmpfile); 130 debug ("Trying to execute \"%s\"\n", cmd); 131 if (system (cmd) == -1) { 132 fprintf (stderr, "%s: system(%s) failed: %s\n", 133 params->cmdname, cmd, strerror(errno)); 134 goto err_system; 135 } 136 137 if (params->keydest) { 138 destfd = mmap_fdt(params, params->keydest, &dest_blob, &sbuf); 139 if (destfd < 0) 140 goto err_keydest; 141 destfd_size = sbuf.st_size; 142 } 143 144 tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf); 145 if (tfd < 0) 146 goto err_mmap; 147 148 /* set hashes for images in the blob */ 149 if (fit_add_verification_data(params->keydir, dest_blob, ptr, 150 NULL, 0)) { 151 fprintf (stderr, "%s Can't add hashes to FIT blob", 152 params->cmdname); 153 goto err_add_hashes; 154 } 155 156 /* add a timestamp at offset 0 i.e., root */ 157 if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) { 158 fprintf (stderr, "%s: Can't add image timestamp\n", 159 params->cmdname); 160 goto err_add_timestamp; 161 } 162 debug ("Added timestamp successfully\n"); 163 164 munmap ((void *)ptr, sbuf.st_size); 165 close (tfd); 166 if (dest_blob) { 167 munmap(dest_blob, destfd_size); 168 close(destfd); 169 } 170 171 if (rename (tmpfile, params->imagefile) == -1) { 172 fprintf (stderr, "%s: Can't rename %s to %s: %s\n", 173 params->cmdname, tmpfile, params->imagefile, 174 strerror (errno)); 175 unlink (tmpfile); 176 unlink (params->imagefile); 177 return (EXIT_FAILURE); 178 } 179 return (EXIT_SUCCESS); 180 181 err_add_timestamp: 182 err_add_hashes: 183 munmap(ptr, sbuf.st_size); 184 err_mmap: 185 if (dest_blob) 186 munmap(dest_blob, destfd_size); 187 err_keydest: 188 err_system: 189 unlink(tmpfile); 190 return -1; 191 } 192 193 static int fit_check_params (struct mkimage_params *params) 194 { 195 return ((params->dflag && (params->fflag || params->lflag)) || 196 (params->fflag && (params->dflag || params->lflag)) || 197 (params->lflag && (params->dflag || params->fflag))); 198 } 199 200 static struct image_type_params fitimage_params = { 201 .name = "FIT Image support", 202 .header_size = sizeof(image_header_t), 203 .hdr = (void*)&header, 204 .verify_header = fit_verify_header, 205 .print_header = fit_print_contents, 206 .check_image_type = fit_check_image_types, 207 .fflag_handle = fit_handle_file, 208 .set_header = NULL, /* FIT images use DTB header */ 209 .check_params = fit_check_params, 210 }; 211 212 void init_fit_image_type (void) 213 { 214 mkimage_register (&fitimage_params); 215 } 216