LXR uboot/lib_mips/bootm_qemu

   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
  30DECLARE_GLOBAL_DATA_PTR;
  31
  32int 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}
  77