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 
30 extern void prom_cif_init(void *);
31 
prom_init(void * cif_handler)32 void __init prom_init(void *cif_handler)
33 {
34 	phandle node;
35 
36 	prom_cif_init(cif_handler);
37 
38 	prom_chosen_node = prom_finddevice(prom_chosen_path);
39 	if (!prom_chosen_node || (s32)prom_chosen_node == -1)
40 		prom_halt();
41 
42 	prom_stdout = prom_getint(prom_chosen_node, "stdout");
43 
44 	node = prom_finddevice("/openprom");
45 	if (!node || (s32)node == -1)
46 		prom_halt();
47 
48 	prom_getstring(node, "version", prom_version, sizeof(prom_version));
49 
50 	prom_printf("\n");
51 }
52 
prom_init_report(void)53 void __init prom_init_report(void)
54 {
55 	printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
56 	printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
57 }
58