1 /* $Id: init.c,v 1.14 2000/01/29 01:09:12 anton Exp $
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/config.h>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
13 #include <asm/openprom.h>
14 #include <asm/oplib.h>
15 #include <asm/sun4prom.h>
17 struct linux_romvec *romvec;
18 enum prom_major_version prom_vers;
19 unsigned int prom_rev, prom_prev;
20 linux_sun4_romvec *sun4_romvec;
22 /* The root node of the prom device tree. */
25 int prom_stdin, prom_stdout;
27 /* Pointer to the device tree operations structure. */
28 struct linux_nodeops *prom_nodeops;
30 /* You must call prom_init() before you attempt to use any of the
31 * routines in the prom library. It returns 0 on success, 1 on
32 * failure. It gets passed the pointer to the PROM vector.
35 extern void prom_meminit(void);
36 extern void prom_ranges_init(void);
38 void __init prom_init(struct linux_romvec *rp)
41 extern struct linux_romvec *sun4_prom_init(void);
42 rp = sun4_prom_init();
46 switch(romvec->pv_romvers) {
57 prom_vers = PROM_SUN4;
60 prom_printf("PROMLIB: Bad PROM version %d\n",
66 prom_rev = romvec->pv_plugin_revision;
67 prom_prev = romvec->pv_printrev;
68 prom_nodeops = romvec->pv_nodeops;
70 prom_root_node = prom_getsibling(0);
71 if((prom_root_node == 0) || (prom_root_node == -1))
74 if((((unsigned long) prom_nodeops) == 0) ||
75 (((unsigned long) prom_nodeops) == -1))
78 if(prom_vers == PROM_V2 || prom_vers == PROM_V3) {
79 prom_stdout = *romvec->pv_v2bootargs.fd_stdout;
80 prom_stdin = *romvec->pv_v2bootargs.fd_stdin;
88 /* SUN4 prints this in sun4_prom_init */
89 printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
90 romvec->pv_romvers, prom_rev);
93 /* Initialization successful. */