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>
11 #include <linux/module.h>
13 #include <asm/openprom.h>
14 #include <asm/oplib.h>
16 struct linux_romvec *romvec;
17 EXPORT_SYMBOL(romvec);
19 enum prom_major_version prom_vers;
20 unsigned int prom_rev, prom_prev;
22 /* The root node of the prom device tree. */
23 phandle prom_root_node;
24 EXPORT_SYMBOL(prom_root_node);
26 /* Pointer to the device tree operations structure. */
27 struct linux_nodeops *prom_nodeops;
29 /* You must call prom_init() before you attempt to use any of the
30 * routines in the prom library.
31 * It gets passed the pointer to the PROM vector.
34 void __init prom_init(struct linux_romvec *rp)
38 switch(romvec->pv_romvers) {
49 prom_printf("PROMLIB: Bad PROM version %d\n",
55 prom_rev = romvec->pv_plugin_revision;
56 prom_prev = romvec->pv_printrev;
57 prom_nodeops = romvec->pv_nodeops;
59 prom_root_node = prom_getsibling(0);
60 if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
63 if((((unsigned long) prom_nodeops) == 0) ||
64 (((unsigned long) prom_nodeops) == -1))
71 printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
72 romvec->pv_romvers, prom_rev);
74 /* Initialization successful. */