ia64/linux-2.6.18-xen.hg

view arch/sparc/prom/init.c @ 0:831230e53067

Import 2.6.18 from kernel.org tarball.
author Ian Campbell <ian.campbell@xensource.com>
date Wed Apr 11 14:15:44 2007 +0100 (2007-04-11)
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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
3 * library functions.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
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. */
22 int prom_root_node;
24 int prom_stdin, prom_stdout;
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. It returns 0 on success, 1 on
31 * failure. It gets passed the pointer to the PROM vector.
32 */
34 extern void prom_meminit(void);
35 extern void prom_ranges_init(void);
37 void __init prom_init(struct linux_romvec *rp)
38 {
39 #ifdef CONFIG_SUN4
40 extern struct linux_romvec *sun4_prom_init(void);
41 rp = sun4_prom_init();
42 #endif
43 romvec = rp;
45 switch(romvec->pv_romvers) {
46 case 0:
47 prom_vers = PROM_V0;
48 break;
49 case 2:
50 prom_vers = PROM_V2;
51 break;
52 case 3:
53 prom_vers = PROM_V3;
54 break;
55 case 40:
56 prom_vers = PROM_SUN4;
57 break;
58 default:
59 prom_printf("PROMLIB: Bad PROM version %d\n",
60 romvec->pv_romvers);
61 prom_halt();
62 break;
63 };
65 prom_rev = romvec->pv_plugin_revision;
66 prom_prev = romvec->pv_printrev;
67 prom_nodeops = romvec->pv_nodeops;
69 prom_root_node = prom_getsibling(0);
70 if((prom_root_node == 0) || (prom_root_node == -1))
71 prom_halt();
73 if((((unsigned long) prom_nodeops) == 0) ||
74 (((unsigned long) prom_nodeops) == -1))
75 prom_halt();
77 if(prom_vers == PROM_V2 || prom_vers == PROM_V3) {
78 prom_stdout = *romvec->pv_v2bootargs.fd_stdout;
79 prom_stdin = *romvec->pv_v2bootargs.fd_stdin;
80 }
82 prom_meminit();
84 prom_ranges_init();
86 #ifndef CONFIG_SUN4
87 /* SUN4 prints this in sun4_prom_init */
88 printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
89 romvec->pv_romvers, prom_rev);
90 #endif
92 /* Initialization successful. */
93 return;
94 }