lib_mips/bootm.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   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/addrspace.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 #define LINUX_MAX_ENVS          256
  34 #define LINUX_MAX_ARGS          256
  35
  36 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  37
  38 static int      linux_argc;
  39 static char **  linux_argv;
  40
  41 static char **  linux_env;
  42 static char *   linux_env_p;
  43 static int      linux_env_idx;
  44
  45 static void linux_params_init (ulong start, char * commandline);
  46 static void linux_env_set (char * env_name, char * env_val);
  47
  48
  49 void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
  50                      image_header_t *hdr, int verify)
  51 {
  52         ulong rd_data, rd_len;
  53         ulong initrd_start, initrd_end;
  54         image_header_t *rd_hdr;
  55
  56         void (*theKernel) (int, char **, char **, int *);
  57         char *commandline = getenv ("bootargs");
  58         char env_buf[12];
  59
  60         theKernel =
  61                 (void (*)(int, char **, char **, int *))image_get_ep (hdr);
  62
  63         /*
  64          * Check if there is an initrd image
  65          */
  66         if (argc >= 3) {
  67                 show_boot_progress (9);
  68
  69                 rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
  70                 printf ("## Loading Ramdisk Image at %08lx ...\n", rd_hdr);
  71
  72                 if (!image_check_magic (rd_hdr)) {
  73                         printf ("Bad Magic Number\n");
  74                         show_boot_progress (-10);
  75                         do_reset (cmdtp, flag, argc, argv);
  76                 }
  77
  78                 if (!image_check_hcrc (rd_hdr)) {
  79                         printf ("Bad Header Checksum\n");
  80                         show_boot_progress (-11);
  81                         do_reset (cmdtp, flag, argc, argv);
  82                 }
  83
  84                 show_boot_progress (10);
  85                 print_image_hdr (rd_hdr);
  86
  87                 rd_data = image_get_data (rd_hdr);
  88                 rd_len = image_get_data_size (rd_hdr);
  89
  90                 if (verify) {
  91                         printf ("   Verifying Checksum ... ");
  92                         if (!image_check_dcrc (rd_hdr)) {
  93                                 printf ("Bad Data CRC\n");
  94                                 show_boot_progress (-12);
  95                                 do_reset (cmdtp, flag, argc, argv);
  96                         }
  97                         printf ("OK\n");
  98                 }
  99
 100                 show_boot_progress (11);
 101
 102                 if (!image_check_os (rd_hdr, IH_OS_LINUX) ||
 103                     !image_check_arch (rd_hdr, IH_ARCH_MIPS) ||
 104                     !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
 105                         printf ("No Linux MIPS Ramdisk Image\n");
 106                         show_boot_progress (-13);
 107                         do_reset (cmdtp, flag, argc, argv);
 108                 }
 109
 110                 /*
 111                  * Now check if we have a multifile image
 112                  */
 113         } else if (image_check_type (hdr, IH_TYPE_MULTI)) {
 114                 /*
 115                  * Get second entry data start address and len
 116                  */
 117                 show_boot_progress (13);
 118                 image_multi_getimg (hdr, 1, &rd_data, &rd_len);
 119         } else {
 120                 /*
 121                  * no initrd image
 122                  */
 123                 show_boot_progress (14);
 124
 125                 rd_data = rd_len = 0;
 126         }
 127
 128 #ifdef  DEBUG
 129         if (!rd_data) {
 130                 printf ("No initrd\n");
 131         }
 132 #endif
 133
 134         if (rd_data) {
 135                 initrd_start = rd_data;
 136                 initrd_end = initrd_start + rd_len;
 137         } else {
 138                 initrd_start = 0;
 139                 initrd_end = 0;
 140         }
 141
 142         show_boot_progress (15);
 143
 144 #ifdef DEBUG
 145         printf ("## Transferring control to Linux (at address %08lx) ...\n",
 146                 (ulong) theKernel);
 147 #endif
 148
 149         linux_params_init (UNCACHED_SDRAM (gd->bd->bi_boot_params), commandline);
 150
 151 #ifdef CONFIG_MEMSIZE_IN_BYTES
 152         sprintf (env_buf, "%lu", gd->ram_size);
 153 #ifdef DEBUG
 154         printf ("## Giving linux memsize in bytes, %lu\n", gd->ram_size);
 155 #endif
 156 #else
 157         sprintf (env_buf, "%lu", gd->ram_size >> 20);
 158 #ifdef DEBUG
 159         printf ("## Giving linux memsize in MB, %lu\n", gd->ram_size >> 20);
 160 #endif
 161 #endif /* CONFIG_MEMSIZE_IN_BYTES */
 162
 163         linux_env_set ("memsize", env_buf);
 164
 165         sprintf (env_buf, "0x%08X", (uint) UNCACHED_SDRAM (initrd_start));
 166         linux_env_set ("initrd_start", env_buf);
 167
 168         sprintf (env_buf, "0x%X", (uint) (initrd_end - initrd_start));
 169         linux_env_set ("initrd_size", env_buf);
 170
 171         sprintf (env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
 172         linux_env_set ("flash_start", env_buf);
 173
 174         sprintf (env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
 175         linux_env_set ("flash_size", env_buf);
 176
 177         /* we assume that the kernel is in place */
 178         printf ("\nStarting kernel ...\n\n");
 179
 180         theKernel (linux_argc, linux_argv, linux_env, 0);
 181 }
 182
 183 static void linux_params_init (ulong start, char *line)
 184 {
 185         char *next, *quote, *argp;
 186
 187         linux_argc = 1;
 188         linux_argv = (char **) start;
 189         linux_argv[0] = 0;
 190         argp = (char *) (linux_argv + LINUX_MAX_ARGS);
 191
 192         next = line;
 193
 194         while (line && *line && linux_argc < LINUX_MAX_ARGS) {
 195                 quote = strchr (line, '"');
 196                 next = strchr (line, ' ');
 197
 198                 while (next != NULL && quote != NULL && quote < next) {
 199                         /* we found a left quote before the next blank
 200                          * now we have to find the matching right quote
 201                          */
 202                         next = strchr (quote + 1, '"');
 203                         if (next != NULL) {
 204                                 quote = strchr (next + 1, '"');
 205                                 next = strchr (next + 1, ' ');
 206                         }
 207                 }
 208
 209                 if (next == NULL) {
 210                         next = line + strlen (line);
 211                 }
 212
 213                 linux_argv[linux_argc] = argp;
 214                 memcpy (argp, line, next - line);
 215                 argp[next - line] = 0;
 216
 217                 argp += next - line + 1;
 218                 linux_argc++;
 219
 220                 if (*next)
 221                         next++;
 222
 223                 line = next;
 224         }
 225
 226         linux_env = (char **) (((ulong) argp + 15) & ~15);
 227         linux_env[0] = 0;
 228         linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS);
 229         linux_env_idx = 0;
 230 }
 231
 232 static void linux_env_set (char *env_name, char *env_val)
 233 {
 234         if (linux_env_idx < LINUX_MAX_ENVS - 1) {
 235                 linux_env[linux_env_idx] = linux_env_p;
 236
 237                 strcpy (linux_env_p, env_name);
 238                 linux_env_p += strlen (env_name);
 239
 240                 strcpy (linux_env_p, "=");
 241                 linux_env_p += 1;
 242
 243                 strcpy (linux_env_p, env_val);
 244                 linux_env_p += strlen (env_val);
 245
 246                 linux_env_p++;
 247                 linux_env[++linux_env_idx] = 0;
 248         }
 249 }