1/* $Id: init.c,v 1.1.1.1 2007/08/03 18:52:19 Exp $
2 * init.c:  Initialize internal variables used by the PROM
3 *          library functions.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/string.h>
12#include <linux/ctype.h>
13
14#include <asm/openprom.h>
15#include <asm/oplib.h>
16
17/* OBP version string. */
18char prom_version[80];
19
20/* The root node of the prom device tree. */
21int prom_stdin, prom_stdout;
22int prom_chosen_node;
23
24/* You must call prom_init() before you attempt to use any of the
25 * routines in the prom library.  It returns 0 on success, 1 on
26 * failure.  It gets passed the pointer to the PROM vector.
27 */
28
29extern void prom_cif_init(void *, void *);
30
31void __init prom_init(void *cif_handler, void *cif_stack)
32{
33	int node;
34
35	prom_cif_init(cif_handler, cif_stack);
36
37	prom_chosen_node = prom_finddevice(prom_chosen_path);
38	if (!prom_chosen_node || prom_chosen_node == -1)
39		prom_halt();
40
41	prom_stdin = prom_getint(prom_chosen_node, "stdin");
42	prom_stdout = prom_getint(prom_chosen_node, "stdout");
43
44	node = prom_finddevice("/openprom");
45	if (!node || node == -1)
46		prom_halt();
47
48	prom_getstring(node, "version", prom_version, sizeof(prom_version));
49
50	prom_printf("\n");
51
52	printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
53	printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
54}
55