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 * default_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
image_check_image_types(uint8_t type)36 static int image_check_image_types (uint8_t type)
37 {
38 if ((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT))
39 return EXIT_SUCCESS;
40 else
41 return EXIT_FAILURE;
42 }
43
image_check_params(struct mkimage_params * params)44 static int image_check_params (struct mkimage_params *params)
45 {
46 return ((params->dflag && (params->fflag || params->lflag)) ||
47 (params->fflag && (params->dflag || params->lflag)) ||
48 (params->lflag && (params->dflag || params->fflag)));
49 }
50
image_verify_header(unsigned char * ptr,int image_size,struct mkimage_params * params)51 static int image_verify_header (unsigned char *ptr, int image_size,
52 struct mkimage_params *params)
53 {
54 uint32_t len;
55 const unsigned char *data;
56 uint32_t checksum;
57 image_header_t header;
58 image_header_t *hdr = &header;
59
60 /*
61 * create copy of header so that we can blank out the
62 * checksum field for checking - this can't be done
63 * on the PROT_READ mapped data.
64 */
65 memcpy (hdr, ptr, sizeof(image_header_t));
66
67 if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
68 fprintf (stderr,
69 "%s: Bad Magic Number: \"%s\" is no valid image\n",
70 params->cmdname, params->imagefile);
71 return -FDT_ERR_BADMAGIC;
72 }
73
74 data = (const unsigned char *)hdr;
75 len = sizeof(image_header_t);
76
77 checksum = be32_to_cpu(hdr->ih_hcrc);
78 hdr->ih_hcrc = cpu_to_be32(0); /* clear for re-calculation */
79
80 if (crc32 (0, data, len) != checksum) {
81 fprintf (stderr,
82 "%s: ERROR: \"%s\" has bad header checksum!\n",
83 params->cmdname, params->imagefile);
84 return -FDT_ERR_BADSTATE;
85 }
86
87 data = (const unsigned char *)ptr + sizeof(image_header_t);
88 len = image_size - sizeof(image_header_t) ;
89
90 checksum = be32_to_cpu(hdr->ih_dcrc);
91 if (crc32 (0, data, len) != checksum) {
92 fprintf (stderr,
93 "%s: ERROR: \"%s\" has corrupted data!\n",
94 params->cmdname, params->imagefile);
95 return -FDT_ERR_BADSTRUCTURE;
96 }
97 return 0;
98 }
99
image_set_header(void * ptr,struct stat * sbuf,int ifd,struct mkimage_params * params)100 static void image_set_header (void *ptr, struct stat *sbuf, int ifd,
101 struct mkimage_params *params)
102 {
103 uint32_t checksum;
104
105 image_header_t * hdr = (image_header_t *)ptr;
106
107 checksum = crc32 (0,
108 (const unsigned char *)(ptr +
109 sizeof(image_header_t)),
110 sbuf->st_size - sizeof(image_header_t));
111
112 /* Build new header */
113 image_set_magic (hdr, IH_MAGIC);
114 image_set_time (hdr, sbuf->st_mtime);
115 image_set_size (hdr, sbuf->st_size - sizeof(image_header_t));
116 image_set_load (hdr, params->addr);
117 image_set_ep (hdr, params->ep);
118 image_set_dcrc (hdr, checksum);
119 image_set_os (hdr, params->os);
120 image_set_arch (hdr, params->arch);
121 image_set_type (hdr, params->type);
122 image_set_comp (hdr, params->comp);
123
124 image_set_name (hdr, params->imagename);
125
126 checksum = crc32 (0, (const unsigned char *)hdr,
127 sizeof(image_header_t));
128
129 image_set_hcrc (hdr, checksum);
130 }
131
132 /*
133 * Default image type parameters definition
134 */
135 static struct image_type_params defimage_params = {
136 .name = "Default Image support",
137 .header_size = sizeof(image_header_t),
138 .hdr = (void*)&header,
139 .check_image_type = image_check_image_types,
140 .verify_header = image_verify_header,
141 .print_header = image_print_contents,
142 .set_header = image_set_header,
143 .check_params = image_check_params,
144 };
145
init_default_image_type(void)146 void init_default_image_type (void)
147 {
148 mkimage_register (&defimage_params);
149 }
150