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
22 #if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32)
23 /* stack for calling 32bit ARC prom */
24 u64 o32_stk[4096];
25 #endif
26
27 void __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
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