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 } 52