arch/mips/arc/init.c

   1 /* $Id: init.c,v 1.5 2000/03/07 15:45:27 ralf Exp $
   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/sgialib.h>
  14
  15 #undef DEBUG_PROM_INIT
  16
  17 /* Master romvec interface. */
  18 struct linux_romvec *romvec;
  19 struct linux_promblock *sgi_pblock;
  20 int prom_argc;
  21 char **prom_argv, **prom_envp;
  22 unsigned short prom_vers, prom_rev;
  23
  24 extern void prom_testtree(void);
  25
  26 int __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
  27 {
  28         struct linux_promblock *pb;
  29
  30         romvec = ROMVECTOR;
  31         pb = sgi_pblock = PROMBLOCK;
  32         prom_argc = argc;
  33         prom_argv = argv;
  34         prom_envp = envp;
  35
  36         if(pb->magic != 0x53435241) {
  37                 prom_printf("Aieee, bad prom vector magic %08lx\n", pb->magic);
  38                 while(1)
  39                         ;
  40         }
  41
  42         prom_init_cmdline();
  43
  44         prom_vers = pb->ver;
  45         prom_rev = pb->rev;
  46         prom_identify_arch();
  47         printk("PROMLIB: ARC firmware Version %d Revision %d\n",
  48                     prom_vers, prom_rev);
  49         prom_meminit();
  50
  51 #ifdef DEBUG_PROM_INIT
  52         {
  53                 prom_printf("Press a key to reboot\n");
  54                 (void) prom_getchar();
  55                 romvec->imode();
  56         }
  57 #endif
  58         return 0;
  59 }