1 /* 2 * (C) Copyright 2008 Semihalf 3 * 4 * (C) Copyright 2000-2006 5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 6 * 7 * See file CREDITS for list of people who contributed to this 8 * project. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of 13 * the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 23 * MA 02111-1307 USA 24 */ 25 #ifndef USE_HOSTCC 26 # include <common.h> 27 # include <watchdog.h> 28 #else 29 # include "mkimage.h" 30 #endif 31 32 #include <image.h> 33 34 unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); 35 36 int image_check_hcrc (image_header_t *hdr) 37 { 38 ulong hcrc; 39 ulong len = image_get_header_size (); 40 image_header_t header; 41 42 /* Copy header so we can blank CRC field for re-calculation */ 43 memmove (&header, (char *)hdr, image_get_header_size ()); 44 image_set_hcrc (&header, 0); 45 46 hcrc = crc32 (0, (unsigned char *)&header, len); 47 48 return (hcrc == image_get_hcrc (hdr)); 49 } 50 51 int image_check_dcrc (image_header_t *hdr) 52 { 53 ulong data = image_get_data (hdr); 54 ulong len = image_get_data_size (hdr); 55 ulong dcrc = crc32 (0, (unsigned char *)data, len); 56 57 return (dcrc == image_get_dcrc (hdr)); 58 } 59 60 int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz) 61 { 62 ulong dcrc = 0; 63 ulong len = image_get_data_size (hdr); 64 ulong data = image_get_data (hdr); 65 66 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) 67 ulong cdata = data; 68 ulong edata = cdata + len; 69 70 while (cdata < edata) { 71 ulong chunk = edata - cdata; 72 73 if (chunk > chunksz) 74 chunk = chunksz; 75 dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk); 76 cdata += chunk; 77 78 WATCHDOG_RESET (); 79 } 80 #else 81 dcrc = crc32 (0, (unsigned char *)data, len); 82 #endif 83 84 return (dcrc == image_get_dcrc (hdr)); 85 } 86 87 int getenv_verify (void) 88 { 89 char *s = getenv ("verify"); 90 return (s && (*s == 'n')) ? 0 : 1; 91 } 92