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 <u-boot/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 static int      linux_argc;
  37 static char **  linux_argv;
  38
  39 static char **  linux_env;
  40 static char *   linux_env_p;
  41 static int      linux_env_idx;
  42
  43 static void linux_params_init (ulong start, char * commandline);
  44 static void linux_env_set (char * env_name, char * env_val);
  45
  46 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  47 {
  48         void    (*theKernel) (int, char **, char **, int *);
  49         char    *commandline = getenv ("bootargs");
  50         char    env_buf[12];
  51         char    *cp;
  52
  53         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  54                 return 1;
  55
  56         /* find kernel entry point */
  57         theKernel = (void (*)(int, char **, char **, int *))images->ep;
  58
  59         show_boot_progress (15);
  60
  61 #ifdef DEBUG
  62         printf ("## Transferring control to Linux (at address %08lx) ...\n",
  63                 (ulong) theKernel);
  64 #endif
  65
  66         linux_params_init (UNCACHED_SDRAM (gd->bd->bi_boot_params), commandline);
  67
  68 #ifdef CONFIG_MEMSIZE_IN_BYTES
  69         sprintf (env_buf, "%lu", (ulong)gd->ram_size);
  70         debug ("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size);
  71 #else
  72         sprintf (env_buf, "%lu", (ulong)(gd->ram_size >> 20));
  73         debug ("## Giving linux memsize in MB, %lu\n", (ulong)(gd->ram_size >> 20));
  74 #endif /* CONFIG_MEMSIZE_IN_BYTES */
  75
  76         linux_env_set ("memsize", env_buf);
  77
  78         sprintf (env_buf, "0x%08X", (uint) UNCACHED_SDRAM (images->rd_start));
  79         linux_env_set ("initrd_start", env_buf);
  80
  81         sprintf (env_buf, "0x%X", (uint) (images->rd_end - images->rd_start));
  82         linux_env_set ("initrd_size", env_buf);
  83
  84         sprintf (env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
  85         linux_env_set ("flash_start", env_buf);
  86
  87         sprintf (env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
  88         linux_env_set ("flash_size", env_buf);
  89
  90         cp = getenv("ethaddr");
  91         if (cp != NULL) {
  92                 linux_env_set("ethaddr", cp);
  93         }
  94
  95         cp = getenv("eth1addr");
  96         if (cp != NULL) {
  97                 linux_env_set("eth1addr", cp);
  98         }
  99
 100         /* we assume that the kernel is in place */
 101         printf ("\nStarting kernel ...\n\n");
 102
 103         theKernel (linux_argc, linux_argv, linux_env, 0);
 104         /* does not return */
 105         return 1;
 106 }
 107
 108 static void linux_params_init (ulong start, char *line)
 109 {
 110         char *next, *quote, *argp;
 111
 112         linux_argc = 1;
 113         linux_argv = (char **) start;
 114         linux_argv[0] = 0;
 115         argp = (char *) (linux_argv + LINUX_MAX_ARGS);
 116
 117         next = line;
 118
 119         while (line && *line && linux_argc < LINUX_MAX_ARGS) {
 120                 quote = strchr (line, '"');
 121                 next = strchr (line, ' ');
 122
 123                 while (next != NULL && quote != NULL && quote < next) {
 124                         /* we found a left quote before the next blank
 125                          * now we have to find the matching right quote
 126                          */
 127                         next = strchr (quote + 1, '"');
 128                         if (next != NULL) {
 129                                 quote = strchr (next + 1, '"');
 130                                 next = strchr (next + 1, ' ');
 131                         }
 132                 }
 133
 134                 if (next == NULL) {
 135                         next = line + strlen (line);
 136                 }
 137
 138                 linux_argv[linux_argc] = argp;
 139                 memcpy (argp, line, next - line);
 140                 argp[next - line] = 0;
 141
 142                 argp += next - line + 1;
 143                 linux_argc++;
 144
 145                 if (*next)
 146                         next++;
 147
 148                 line = next;
 149         }
 150
 151         linux_env = (char **) (((ulong) argp + 15) & ~15);
 152         linux_env[0] = 0;
 153         linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS);
 154         linux_env_idx = 0;
 155 }
 156
 157 static void linux_env_set (char *env_name, char *env_val)
 158 {
 159         if (linux_env_idx < LINUX_MAX_ENVS - 1) {
 160                 linux_env[linux_env_idx] = linux_env_p;
 161
 162                 strcpy (linux_env_p, env_name);
 163                 linux_env_p += strlen (env_name);
 164
 165                 strcpy (linux_env_p, "=");
 166                 linux_env_p += 1;
 167
 168                 strcpy (linux_env_p, env_val);
 169                 linux_env_p += strlen (env_val);
 170
 171                 linux_env_p++;
 172                 linux_env[++linux_env_idx] = 0;
 173         }
 174 }