arch/nios2/lib/bootm.c

   1 /*
   2  * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.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
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (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,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <asm/byteorder.h>
  27 #include <asm/cache.h>
  28
  29 #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
  30
  31 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  32 {
  33         void (*kernel)(int, int, int, char *) = (void *)images->ep;
  34         char *commandline = getenv("bootargs");
  35         ulong initrd_start = images->rd_start;
  36         ulong initrd_end = images->rd_end;
  37
  38         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  39                 return 1;
  40
  41         /* flushes data and instruction caches before calling the kernel */
  42         disable_interrupts();
  43         flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
  44         flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
  45
  46         debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
  47         debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
  48         kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
  49         /* does not return */
  50
  51         return 1;
  52 }