release/src-rt-6.x/linux/linux-2.6/arch/mips/arc/init.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * PROM library initialisation code.
   7  *
   8  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
   9  */
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12
  13 #include <asm/bootinfo.h>
  14 #include <asm/sgialib.h>
  15
  16 #undef DEBUG_PROM_INIT
  17
  18 /* Master romvec interface. */
  19 struct linux_romvec *romvec;
  20 int prom_argc;
  21 LONG *_prom_argv, *_prom_envp;
  22
  23 void __init prom_init(void)
  24 {
  25         PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
  26
  27         romvec = ROMVECTOR;
  28
  29         prom_argc = fw_arg0;
  30         _prom_argv = (LONG *) fw_arg1;
  31         _prom_envp = (LONG *) fw_arg2;
  32
  33         if (pb->magic != 0x53435241) {
  34                 printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
  35                        (unsigned long) pb->magic);
  36                 while(1)
  37                         ;
  38         }
  39
  40         prom_init_cmdline();
  41         prom_identify_arch();
  42         printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n",
  43                pb->ver, pb->rev);
  44         prom_meminit();
  45
  46 #ifdef DEBUG_PROM_INIT
  47         pr_info("Press a key to reboot\n");
  48         ArcRead(0, &c, 1, &cnt);
  49         ArcEnterInteractiveMode();
  50 #endif
  51 }