arch/mips/fw/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 #include <asm/smp-ops.h>
  16
  17 #undef DEBUG_PROM_INIT
  18
  19 /* Master romvec interface. */
  20 struct linux_romvec *romvec;
  21 int prom_argc;
  22 LONG *_prom_argv, *_prom_envp;
  23
  24 void __init prom_init(void)
  25 {
  26         PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
  27
  28         romvec = ROMVECTOR;
  29
  30         prom_argc = fw_arg0;
  31         _prom_argv = (LONG *) fw_arg1;
  32         _prom_envp = (LONG *) fw_arg2;
  33
  34         if (pb->magic != 0x53435241) {
  35                 printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
  36                        (unsigned long) pb->magic);
  37                 while(1)
  38                         ;
  39         }
  40
  41         prom_init_cmdline();
  42         prom_identify_arch();
  43         printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n",
  44                pb->ver, pb->rev);
  45         prom_meminit();
  46
  47 #ifdef DEBUG_PROM_INIT
  48         pr_info("Press a key to reboot\n");
  49         ArcRead(0, &c, 1, &cnt);
  50         ArcEnterInteractiveMode();
  51 #endif
  52 #ifdef CONFIG_SGI_IP27
  53         {
  54                 extern struct plat_smp_ops ip27_smp_ops;
  55
  56                 register_smp_ops(&ip27_smp_ops);
  57         }
  58 #endif
  59 }