1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * init.c:  Initialize internal variables used by the PROM
 4 *          library functions.
 5 *
 6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 7 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/module.h>
13
14#include <asm/openprom.h>
15#include <asm/oplib.h>
16
17struct linux_romvec *romvec;
18EXPORT_SYMBOL(romvec);
19
20enum prom_major_version prom_vers;
21unsigned int prom_rev, prom_prev;
22
23/* The root node of the prom device tree. */
24phandle prom_root_node;
25EXPORT_SYMBOL(prom_root_node);
26
27/* Pointer to the device tree operations structure. */
28struct linux_nodeops *prom_nodeops;
29
30/* You must call prom_init() before you attempt to use any of the
31 * routines in the prom library.
32 * It gets passed the pointer to the PROM vector.
33 */
 
 
 
34
35void __init prom_init(struct linux_romvec *rp)
36{
37	romvec = rp;
38
39	switch(romvec->pv_romvers) {
40	case 0:
41		prom_vers = PROM_V0;
42		break;
43	case 2:
44		prom_vers = PROM_V2;
45		break;
46	case 3:
47		prom_vers = PROM_V3;
48		break;
49	default:
50		prom_printf("PROMLIB: Bad PROM version %d\n",
51			    romvec->pv_romvers);
52		prom_halt();
53		break;
54	}
55
56	prom_rev = romvec->pv_plugin_revision;
57	prom_prev = romvec->pv_printrev;
58	prom_nodeops = romvec->pv_nodeops;
59
60	prom_root_node = prom_getsibling(0);
61	if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
62		prom_halt();
63
64	if((((unsigned long) prom_nodeops) == 0) || 
65	   (((unsigned long) prom_nodeops) == -1))
66		prom_halt();
67
68	prom_meminit();
69
70	prom_ranges_init();
71
72	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
73	       romvec->pv_romvers, prom_rev);
74
75	/* Initialization successful. */
76}

 
 1/*
 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 */
 8
 9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/module.h>
12
13#include <asm/openprom.h>
14#include <asm/oplib.h>
15
16struct linux_romvec *romvec;
17EXPORT_SYMBOL(romvec);
18
19enum prom_major_version prom_vers;
20unsigned int prom_rev, prom_prev;
21
22/* The root node of the prom device tree. */
23phandle prom_root_node;
24EXPORT_SYMBOL(prom_root_node);
25
26/* Pointer to the device tree operations structure. */
27struct linux_nodeops *prom_nodeops;
28
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 */
33
34extern void prom_meminit(void);
35extern void prom_ranges_init(void);
36
37void __init prom_init(struct linux_romvec *rp)
38{
39	romvec = rp;
40
41	switch(romvec->pv_romvers) {
42	case 0:
43		prom_vers = PROM_V0;
44		break;
45	case 2:
46		prom_vers = PROM_V2;
47		break;
48	case 3:
49		prom_vers = PROM_V3;
50		break;
51	default:
52		prom_printf("PROMLIB: Bad PROM version %d\n",
53			    romvec->pv_romvers);
54		prom_halt();
55		break;
56	}
57
58	prom_rev = romvec->pv_plugin_revision;
59	prom_prev = romvec->pv_printrev;
60	prom_nodeops = romvec->pv_nodeops;
61
62	prom_root_node = prom_getsibling(0);
63	if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
64		prom_halt();
65
66	if((((unsigned long) prom_nodeops) == 0) || 
67	   (((unsigned long) prom_nodeops) == -1))
68		prom_halt();
69
70	prom_meminit();
71
72	prom_ranges_init();
73
74	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
75	       romvec->pv_romvers, prom_rev);
76
77	/* Initialization successful. */
78}