lib_i386/bootm.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <image.h>
  27 #include <zlib.h>
  28 #include <asm/byteorder.h>
  29 #include <asm/zimage.h>
  30
  31 /*cmd_boot.c*/
  32 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  33
  34 void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  35                 image_header_t *hdr, int verify)
  36 {
  37         void *base_ptr;
  38
  39         ulong os_data, os_len;
  40         ulong rd_data, rd_len;
  41         ulong initrd_start, initrd_end;
  42         image_header_t *rd_hdr;
  43
  44         /*
  45          * Check if there is an initrd image
  46          */
  47         if (argc >= 3) {
  48                 rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
  49                 printf ("## Loading Ramdisk Image at %08lx ...\n", rd_hdr);
  50
  51                 if (!image_check_magic (rd_hdr)) {
  52                         printf ("Bad Magic Number\n");
  53                         do_reset (cmdtp, flag, argc, argv);
  54                 }
  55
  56                 if (!image_check_hcrc (rd_hdr)) {
  57                         printf ("Bad Header Checksum\n");
  58                         do_reset (cmdtp, flag, argc, argv);
  59                 }
  60
  61                 print_image_hdr (rd_hdr);
  62
  63                 rd_data = image_get_data (rd_hdr);
  64                 rd_len = image_get_data_size (rd_hdr);
  65
  66                 if (verify) {
  67                         printf ("   Verifying Checksum ... ");
  68                         if (!image_check_dcrc (rd_hdr)) {
  69                                 printf ("Bad Data CRC\n");
  70                                 do_reset (cmdtp, flag, argc, argv);
  71                         }
  72                         printf ("OK\n");
  73                 }
  74
  75                 if (!image_check_os (rd_hdr, IH_OS_LINUX) ||
  76                     !image_check_arch (rd_hdr, IH_ARCH_I386) ||
  77                     !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
  78                         printf ("No Linux i386 Ramdisk Image\n");
  79                         do_reset (cmdtp, flag, argc, argv);
  80                 }
  81
  82                 /*
  83                  * Now check if we have a multifile image
  84                  */
  85         } else if (image_check_type (hdr, IH_TYPE_MULTI)) {
  86                 /*
  87                  * Get second entry data start address and len
  88                  */
  89                 image_multi_getimg (hdr, 1, &rd_data, &rd_len);
  90         } else {
  91                 /*
  92                  * no initrd image
  93                  */
  94                 rd_data = rd_len = 0;
  95         }
  96
  97 #ifdef  DEBUG
  98         if (!rd_data) {
  99                 printf ("No initrd\n");
 100         }
 101 #endif
 102
 103         if (rd_data) {
 104                 initrd_start = rd_data;
 105                 initrd_end = initrd_start + rd_len;
 106                 printf ("   Loading Ramdisk to %08lx, end %08lx ... ",
 107                         initrd_start, initrd_end);
 108                 memmove ((void *)initrd_start, (void *)rd_data, rd_len);
 109                 printf ("OK\n");
 110         } else {
 111                 initrd_start = 0;
 112                 initrd_end = 0;
 113         }
 114
 115         /* if multi-part image, we need to advance base ptr */
 116         if (image_check_type (hdr, IH_TYPE_MULTI)) {
 117                 image_multi_getimg (hdr, 0, &os_data, &os_len);
 118         } else {
 119                 os_data = image_get_data (hdr);
 120                 os_len = image_get_data_size (hdr);
 121         }
 122
 123         base_ptr = load_zimage ((void*)os_data, os_len,
 124                         initrd_start, rd_len, 0);
 125
 126         if (NULL == base_ptr) {
 127                 printf ("## Kernel loading failed ...\n");
 128                 do_reset(cmdtp, flag, argc, argv);
 129
 130         }
 131
 132 #ifdef DEBUG
 133         printf ("## Transferring control to Linux (at address %08x) ...\n",
 134                 (u32)base_ptr);
 135 #endif
 136
 137         /* we assume that the kernel is in place */
 138         printf("\nStarting kernel ...\n\n");
 139
 140         boot_zimage(base_ptr);
 141
 142 }