1 /* $Id: init.c,v 1.10 1999/09/21 14:35:59 davem 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) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/string.h>
12 #include <linux/ctype.h>
14 #include <asm/openprom.h>
15 #include <asm/oplib.h>
17 enum prom_major_version prom_vers;
18 unsigned int prom_rev, prom_prev;
20 /* The root node of the prom device tree. */
22 int prom_stdin, prom_stdout;
25 /* You must call prom_init() before you attempt to use any of the
26 * routines in the prom library. It returns 0 on success, 1 on
27 * failure. It gets passed the pointer to the PROM vector.
30 extern void prom_cif_init(void *, void *);
32 void __init prom_init(void *cif_handler, void *cif_stack)
40 prom_vers = PROM_P1275;
42 prom_cif_init(cif_handler, cif_stack);
44 prom_root_node = prom_getsibling(0);
45 if((prom_root_node == 0) || (prom_root_node == -1))
48 prom_chosen_node = prom_finddevice(prom_chosen_path);
49 if (!prom_chosen_node || prom_chosen_node == -1)
52 prom_stdin = prom_getint (prom_chosen_node, "stdin");
53 prom_stdout = prom_getint (prom_chosen_node, "stdout");
55 node = prom_finddevice("/openprom");
56 if (!node || node == -1)
59 prom_getstring (node, "version", buffer, sizeof (buffer));
63 if (strncmp (buffer, "OBP ", 4))
67 * Version field is expected to be 'OBP xx.yy.zz date...'
68 * However, Sun can't stick to this format very well, so
69 * we need to check for 'OBP xx.yy.zz date...' and adjust
73 if (strncmp (buffer, "OBP ", 5))
78 p = buffer + bufadjust;
79 while (p && isdigit(*p) && i < 3) {
80 ints[i++] = simple_strtoul(p, NULL, 0);
81 if ((p = strchr(p, '.')) != NULL)
88 prom_prev = (ints[0] << 16) | (ints[1] << 8) | ints[2];
90 printk ("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
92 /* Initialization successful. */
96 prom_printf ("Strange OBP version `%s'.\n", buffer);