arch/mips/arc/init.c

   1 /*
   2  * init.c: PROM library initialisation code.
   3  *
   4  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
   5  *
   6  * $Id: init.c,v 1.2 1999/02/25 21:22:49 tsbogend Exp $
   7  */
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/config.h>
  11
  12 #include <asm/sgialib.h>
  13
  14 /* #define DEBUG_PROM_INIT */
  15
  16 /* Master romvec interface. */
  17 struct linux_romvec *romvec;
  18 struct linux_promblock *sgi_pblock;
  19 int prom_argc;
  20 char **prom_argv, **prom_envp;
  21 unsigned short prom_vers, prom_rev;
  22
  23 extern void prom_testtree(void);
  24
  25 int __init prom_init(int argc, char **argv, char **envp)
  26 {
  27         struct linux_promblock *pb;
  28
  29         romvec = ROMVECTOR;
  30         pb = sgi_pblock = PROMBLOCK;
  31         prom_argc = argc;
  32         prom_argv = argv;
  33         prom_envp = envp;
  34
  35         if(pb->magic != 0x53435241) {
  36                 prom_printf("Aieee, bad prom vector magic %08lx\n", pb->magic);
  37                 while(1)
  38                         ;
  39         }
  40
  41         prom_init_cmdline();
  42
  43         prom_vers = pb->ver;
  44         prom_rev = pb->rev;
  45         prom_identify_arch();
  46 #ifdef CONFIG_SGI
  47         printk("PROMLIB: SGI ARCS firmware Version %d Revision %d\n",
  48                     prom_vers, prom_rev);
  49 #else
  50         printk("PROMLIB: ARC firmware Version %d Revision %d\n",
  51                     prom_vers, prom_rev);
  52 #endif
  53         prom_meminit();
  54
  55 #if 0
  56         prom_testtree();
  57 #endif
  58
  59 #ifdef DEBUG_PROM_INIT
  60         {
  61                 prom_printf("Press a key to reboot\n");
  62                 (void) prom_getchar();
  63                 romvec->imode();
  64         }
  65 #endif
  66         return 0;
  67 }