LXR uboot/tools/default

   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 * SPDX-License-Identifier:     GPL-2.0+
  15 */
  16
  17#include "imagetool.h"
  18#include "mkimage.h"
  19
  20#include <image.h>
  21#include <u-boot/crc.h>
  22
  23static image_header_t header;
  24
  25static int image_check_image_types(uint8_t type)
  26{
  27        if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
  28            (type == IH_TYPE_KERNEL_NOLOAD) || (type == IH_TYPE_FIRMWARE_IVT))
  29                return EXIT_SUCCESS;
  30        else
  31                return EXIT_FAILURE;
  32}
  33
  34static int image_check_params(struct image_tool_params *params)
  35{
  36        return  ((params->dflag && (params->fflag || params->lflag)) ||
  37                (params->fflag && (params->dflag || params->lflag)) ||
  38                (params->lflag && (params->dflag || params->fflag)));
  39}
  40
  41static int image_verify_header(unsigned char *ptr, int image_size,
  42                        struct image_tool_params *params)
  43{
  44        uint32_t len;
  45        const unsigned char *data;
  46        uint32_t checksum;
  47        image_header_t header;
  48        image_header_t *hdr = &header;
  49
  50        /*
  51         * create copy of header so that we can blank out the
  52         * checksum field for checking - this can't be done
  53         * on the PROT_READ mapped data.
  54         */
  55        memcpy(hdr, ptr, sizeof(image_header_t));
  56
  57        if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
  58                debug("%s: Bad Magic Number: \"%s\" is no valid image\n",
  59                      params->cmdname, params->imagefile);
  60                return -FDT_ERR_BADMAGIC;
  61        }
  62
  63        data = (const unsigned char *)hdr;
  64        len  = sizeof(image_header_t);
  65
  66        checksum = be32_to_cpu(hdr->ih_hcrc);
  67        hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
  68
  69        if (crc32(0, data, len) != checksum) {
  70                debug("%s: ERROR: \"%s\" has bad header checksum!\n",
  71                      params->cmdname, params->imagefile);
  72                return -FDT_ERR_BADSTATE;
  73        }
  74
  75        data = (const unsigned char *)ptr + sizeof(image_header_t);
  76        len  = image_size - sizeof(image_header_t) ;
  77
  78        checksum = be32_to_cpu(hdr->ih_dcrc);
  79        if (crc32(0, data, len) != checksum) {
  80                debug("%s: ERROR: \"%s\" has corrupted data!\n",
  81                      params->cmdname, params->imagefile);
  82                return -FDT_ERR_BADSTRUCTURE;
  83        }
  84        return 0;
  85}
  86
  87static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
  88                                struct image_tool_params *params)
  89{
  90        uint32_t checksum;
  91        time_t time;
  92        uint32_t imagesize;
  93
  94        image_header_t * hdr = (image_header_t *)ptr;
  95
  96        checksum = crc32(0,
  97                        (const unsigned char *)(ptr +
  98                                sizeof(image_header_t)),
  99                        sbuf->st_size - sizeof(image_header_t));
 100
 101        time = imagetool_get_source_date(params, sbuf->st_mtime);
 102        if (params->type == IH_TYPE_FIRMWARE_IVT)
 103                /* Add size of CSF minus IVT */
 104                imagesize = sbuf->st_size - sizeof(image_header_t) + 0x1FE0;
 105        else
 106                imagesize = sbuf->st_size - sizeof(image_header_t);
 107
 108        /* Build new header */
 109        image_set_magic(hdr, IH_MAGIC);
 110        image_set_time(hdr, time);
 111        image_set_size(hdr, imagesize);
 112        image_set_load(hdr, params->addr);
 113        image_set_ep(hdr, params->ep);
 114        image_set_dcrc(hdr, checksum);
 115        image_set_os(hdr, params->os);
 116        image_set_arch(hdr, params->arch);
 117        image_set_type(hdr, params->type);
 118        image_set_comp(hdr, params->comp);
 119
 120        image_set_name(hdr, params->imagename);
 121
 122        checksum = crc32(0, (const unsigned char *)hdr,
 123                                sizeof(image_header_t));
 124
 125        image_set_hcrc(hdr, checksum);
 126}
 127
 128static int image_extract_subimage(void *ptr, struct image_tool_params *params)
 129{
 130        const image_header_t *hdr = (const image_header_t *)ptr;
 131        ulong file_data;
 132        ulong file_len;
 133
 134        if (image_check_type(hdr, IH_TYPE_MULTI)) {
 135                ulong idx = params->pflag;
 136                ulong count;
 137
 138                /* get the number of data files present in the image */
 139                count = image_multi_count(hdr);
 140
 141                /* retrieve the "data file" at the idx position */
 142                image_multi_getimg(hdr, idx, &file_data, &file_len);
 143
 144                if ((file_len == 0) || (idx >= count)) {
 145                        fprintf(stderr, "%s: No such data file %ld in \"%s\"\n",
 146                                params->cmdname, idx, params->imagefile);
 147                        return -1;
 148                }
 149        } else {
 150                file_data = image_get_data(hdr);
 151                file_len = image_get_size(hdr);
 152        }
 153
 154        /* save the "data file" into the file system */
 155        return imagetool_save_subimage(params->outfile, file_data, file_len);
 156}
 157
 158/*
 159 * Default image type parameters definition
 160 */
 161U_BOOT_IMAGE_TYPE(
 162        defimage,
 163        "Default Image support",
 164        sizeof(image_header_t),
 165        (void *)&header,
 166        image_check_params,
 167        image_verify_header,
 168        image_print_contents,
 169        image_set_header,
 170        image_extract_subimage,
 171        image_check_image_types,
 172        NULL,
 173        NULL
 174);
 175