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. */
19 char prom_version[80];
20
21 /* The root node of the prom device tree. */
22 int prom_stdout;
23 phandle 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 */
29 void __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
50 void __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 }
55
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