Linux Kernel  3.7.1
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init_64.c
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1 /*
2  * init.c: Initialize internal variables used by the PROM
3  * library functions.
4  *
5  * Copyright (C) 1995 David S. Miller ([email protected])
6  * Copyright (C) 1996,1997 Jakub Jelinek ([email protected])
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. */
18 char prom_version[80];
19 
20 /* The root node of the prom device tree. */
23 
24 /* You must call prom_init() before you attempt to use any of the
25  * routines in the prom library.
26  * It gets passed the pointer to the PROM vector.
27  */
28 
29 extern void prom_cif_init(void *, void *);
30 
31 void __init prom_init(void *cif_handler, void *cif_stack)
32 {
33  phandle node;
34 
35  prom_cif_init(cif_handler, cif_stack);
36 
38  if (!prom_chosen_node || (s32)prom_chosen_node == -1)
39  prom_halt();
40 
42 
43  node = prom_finddevice("/openprom");
44  if (!node || (s32)node == -1)
45  prom_halt();
46 
47  prom_getstring(node, "version", prom_version, sizeof(prom_version));
48 
49  prom_printf("\n");
50 }
51 
53 {
54  printk("PROMLIB: Sun IEEE Boot Prom '%s'\n", prom_version);
55  printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
56 }