init_64.c

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * init.c:  Initialize internal variables used by the PROM
 4 *          library functions.
 5 *
 6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 7 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/string.h>
13#include <linux/ctype.h>
14
15#include <asm/openprom.h>
16#include <asm/oplib.h>
17
18/* OBP version string. */
19char prom_version[80];
20
21/* The root node of the prom device tree. */
22int prom_stdout;
23phandle prom_chosen_node;
24
25/* You must call prom_init() before you attempt to use any of the
26 * routines in the prom library.
27 * It gets passed the pointer to the PROM vector.
28 */
29void __init prom_init(void *cif_handler)
30{
31	phandle node;
32
33	prom_cif_init(cif_handler);
34
35	prom_chosen_node = prom_finddevice(prom_chosen_path);
36	if (!prom_chosen_node || (s32)prom_chosen_node == -1)
37		prom_halt();
38
39	prom_stdout = prom_getint(prom_chosen_node, "stdout");
40
41	node = prom_finddevice("/openprom");
42	if (!node || (s32)node == -1)
43		prom_halt();
44
45	prom_getstring(node, "version", prom_version, sizeof(prom_version));
46
47	prom_printf("\n");
48}
49
50void __init prom_init_report(void)
51{
52	printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
53	printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
54}