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
6 * PROM library initialisation code.
8 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
10 #include <linux/init.h>
11 #include <linux/kernel.h>
13 #include <asm/bootinfo.h>
14 #include <asm/sgialib.h>
16 #undef DEBUG_PROM_INIT
18 /* Master romvec interface. */
19 struct linux_romvec *romvec;
21 LONG *_prom_argv, *_prom_envp;
23 void __init prom_init(void)
25 PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
30 _prom_argv = (LONG *) fw_arg1;
31 _prom_envp = (LONG *) fw_arg2;
33 if (pb->magic != 0x53435241) {
34 printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n",
35 (unsigned long) pb->magic);
42 printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n",
46 #ifdef DEBUG_PROM_INIT
47 pr_info("Press a key to reboot\n");
48 ArcRead(0, &c, 1, &cnt);
49 ArcEnterInteractiveMode();