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. */
21 int prom_stdin, prom_stdout;
24 /* You must call prom_init() before you attempt to use any of the
25 * routines in the prom library. It returns 0 on success, 1 on
26 * failure. It gets passed the pointer to the PROM vector.
29 extern void prom_cif_init(void *, void *);
31 void __init prom_init(void *cif_handler, void *cif_stack)
39 prom_vers = PROM_P1275;
41 prom_cif_init(cif_handler, cif_stack);
43 prom_chosen_node = prom_finddevice(prom_chosen_path);
44 if (!prom_chosen_node || prom_chosen_node == -1)
47 prom_stdin = prom_getint(prom_chosen_node, "stdin");
48 prom_stdout = prom_getint(prom_chosen_node, "stdout");
50 node = prom_finddevice("/openprom");
51 if (!node || node == -1)
54 prom_getstring(node, "version", buffer, sizeof (buffer));
58 if (strncmp(buffer, "OBP ", 4))
62 * Version field is expected to be 'OBP xx.yy.zz date...'
63 * However, Sun can't stick to this format very well, so
64 * we need to check for 'OBP xx.yy.zz date...' and adjust
68 if (strncmp(buffer, "OBP ", 5))
73 p = buffer + bufadjust;
74 while (p && isdigit(*p) && i < 3) {
75 ints[i++] = simple_strtoul(p, NULL, 0);
76 if ((p = strchr(p, '.')) != NULL)
83 prom_prev = (ints[0] << 16) | (ints[1] << 8) | ints[2];
85 printk("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
86 printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
88 /* Initialization successful. */
92 prom_printf ("Strange OBP version `%s'.\n", buffer);