blob: 7b00f89490a4d1babbf14b7079b3072546743a1a [file] [log] [blame]
Adrian Bunkb00dc832008-05-19 16:52:27 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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
David S. Miller90a66462006-03-08 17:18:19 -080017/* OBP version string. */
18char prom_version[80];
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20/* The root node of the prom device tree. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070021int 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070029extern void prom_cif_init(void *, void *);
30
31void __init prom_init(void *cif_handler, void *cif_stack)
32{
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 int node;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35 prom_cif_init(cif_handler, cif_stack);
36
David S. Millerbff06d52005-09-22 20:11:33 -070037 prom_chosen_node = prom_finddevice(prom_chosen_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 if (!prom_chosen_node || prom_chosen_node == -1)
39 prom_halt();
40
David S. Millerd82ace72006-02-09 02:52:44 -080041 prom_stdin = prom_getint(prom_chosen_node, "stdin");
42 prom_stdout = prom_getint(prom_chosen_node, "stdout");
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44 node = prom_finddevice("/openprom");
45 if (!node || node == -1)
46 prom_halt();
47
David S. Miller90a66462006-03-08 17:18:19 -080048 prom_getstring(node, "version", prom_version, sizeof(prom_version));
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
David S. Millerd82ace72006-02-09 02:52:44 -080050 prom_printf("\n");
David S. Millerce22e1d2008-02-07 02:14:48 -080051}
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
David S. Millerce22e1d2008-02-07 02:14:48 -080053void __init prom_init_report(void)
54{
David S. Miller90a66462006-03-08 17:18:19 -080055 printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
David S. Millerd82ace72006-02-09 02:52:44 -080056 printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057}