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. */
20struct linux_romvec *romvec;
21
22#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32)
23/* stack for calling 32bit ARC prom */
24u64 o32_stk[4096];
25#endif
26
27void __init prom_init(void)
28{
29	PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK;
30
31	romvec = ROMVECTOR;
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(fw_arg0, (LONG *)fw_arg1);
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