18c2ecf20Sopenharmony_ci/* 28c2ecf20Sopenharmony_ci * This file is subject to the terms and conditions of the GNU General Public 38c2ecf20Sopenharmony_ci * License. See the file "COPYING" in the main directory of this archive 48c2ecf20Sopenharmony_ci * for more details. 58c2ecf20Sopenharmony_ci * 68c2ecf20Sopenharmony_ci * PROM library initialisation code. 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci * Copyright (C) 1996 David S. Miller (davem@davemloft.net) 98c2ecf20Sopenharmony_ci */ 108c2ecf20Sopenharmony_ci#include <linux/init.h> 118c2ecf20Sopenharmony_ci#include <linux/kernel.h> 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ci#include <asm/bootinfo.h> 148c2ecf20Sopenharmony_ci#include <asm/sgialib.h> 158c2ecf20Sopenharmony_ci#include <asm/smp-ops.h> 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ci#undef DEBUG_PROM_INIT 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci/* Master romvec interface. */ 208c2ecf20Sopenharmony_cistruct linux_romvec *romvec; 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32) 238c2ecf20Sopenharmony_ci/* stack for calling 32bit ARC prom */ 248c2ecf20Sopenharmony_ciu64 o32_stk[4096]; 258c2ecf20Sopenharmony_ci#endif 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_civoid __init prom_init(void) 288c2ecf20Sopenharmony_ci{ 298c2ecf20Sopenharmony_ci PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK; 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci romvec = ROMVECTOR; 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci if (pb->magic != 0x53435241) { 348c2ecf20Sopenharmony_ci printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n", 358c2ecf20Sopenharmony_ci (unsigned long) pb->magic); 368c2ecf20Sopenharmony_ci while(1) 378c2ecf20Sopenharmony_ci ; 388c2ecf20Sopenharmony_ci } 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); 418c2ecf20Sopenharmony_ci prom_identify_arch(); 428c2ecf20Sopenharmony_ci printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n", 438c2ecf20Sopenharmony_ci pb->ver, pb->rev); 448c2ecf20Sopenharmony_ci prom_meminit(); 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci#ifdef DEBUG_PROM_INIT 478c2ecf20Sopenharmony_ci pr_info("Press a key to reboot\n"); 488c2ecf20Sopenharmony_ci ArcRead(0, &c, 1, &cnt); 498c2ecf20Sopenharmony_ci ArcEnterInteractiveMode(); 508c2ecf20Sopenharmony_ci#endif 518c2ecf20Sopenharmony_ci} 52