2 * init.c: Initialize internal variables used by the PROM
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 #include <linux/kernel.h>
10 #include <linux/init.h>
12 #include <asm/openprom.h>
13 #include <asm/oplib.h>
14 #include <asm/sun4prom.h>
16 struct linux_romvec *romvec;
17 enum prom_major_version prom_vers;
18 unsigned int prom_rev, prom_prev;
19 linux_sun4_romvec *sun4_romvec;
21 /* The root node of the prom device tree. */
24 /* Pointer to the device tree operations structure. */
25 struct linux_nodeops *prom_nodeops;
27 /* You must call prom_init() before you attempt to use any of the
28 * routines in the prom library. It returns 0 on success, 1 on
29 * failure. It gets passed the pointer to the PROM vector.
32 extern void prom_meminit(void);
33 extern void prom_ranges_init(void);
35 void __init prom_init(struct linux_romvec *rp)
38 extern struct linux_romvec *sun4_prom_init(void);
39 rp = sun4_prom_init();
43 switch(romvec->pv_romvers) {
54 prom_vers = PROM_SUN4;
57 prom_printf("PROMLIB: Bad PROM version %d\n",
63 prom_rev = romvec->pv_plugin_revision;
64 prom_prev = romvec->pv_printrev;
65 prom_nodeops = romvec->pv_nodeops;
67 prom_root_node = prom_getsibling(0);
68 if((prom_root_node == 0) || (prom_root_node == -1))
71 if((((unsigned long) prom_nodeops) == 0) ||
72 (((unsigned long) prom_nodeops) == -1))
80 /* SUN4 prints this in sun4_prom_init */
81 printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
82 romvec->pv_romvers, prom_rev);
85 /* Initialization successful. */