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 (davem@davemloft.net) 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 const struct plat_smp_ops ip27_smp_ops; 55 56 register_smp_ops(&ip27_smp_ops); 57 } 58 #endif 59 } 60