lib_mips/bootm_qemu_mips.c

   1 /*
   2  * (C) Copyright 2008
   3  * Jean-Christophe PLAGNIOL-VILLARD <jcplagniol@jcrosoft.com>
   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 <asm/byteorder.h>
  28 #include <asm/addrspace.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  33 {
  34         void    (*theKernel) (int, char **, char **, int *);
  35         char    *bootargs = getenv ("bootargs");
  36         char    *start;
  37         uint    len;
  38
  39         /* find kernel entry point */
  40         theKernel = (void (*)(int, char **, char **, int *))images->ep;
  41
  42         show_boot_progress (15);
  43
  44         debug ("## Transferring control to Linux (at address %08lx) ...\n",
  45                 (ulong) theKernel);
  46
  47         gd->bd->bi_boot_params = gd->bd->bi_memstart + (16 << 20) - 256;
  48         debug ("%-12s= 0x%08lX\n", "boot_params", (ulong)gd->bd->bi_boot_params);
  49
  50         /* set Magic */
  51         *(int32_t *)(gd->bd->bi_boot_params - 4) = 0x12345678;
  52         /* set ram_size */
  53         *(int32_t *)(gd->bd->bi_boot_params - 8) = gd->ram_size;
  54
  55         start = (char*)gd->bd->bi_boot_params;
  56
  57         len = strlen(bootargs);
  58
  59         strncpy(start, bootargs, len + 1);
  60
  61         start += len;
  62
  63         len = images->rd_end - images->rd_start;
  64         if (len > 0) {
  65                 start += sprintf(start," rd_start=0x%08X rd_size=0x%0X",
  66                 (uint) UNCACHED_SDRAM (images->rd_start),
  67                 (uint) len);
  68         }
  69
  70         /* we assume that the kernel is in place */
  71         printf ("\nStarting kernel ...\n\n");
  72
  73         theKernel (0, NULL, NULL, 0);
  74         /* does not return */
  75         return 1;
  76 }