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 */
 8
 9#include <linux/kernel.h>
10#include <linux/init.h>
11
12#include <asm/openprom.h>
13#include <asm/oplib.h>
14
15struct linux_romvec *romvec;
16enum prom_major_version prom_vers;
17unsigned int prom_rev, prom_prev;
18
19/* The root node of the prom device tree. */
20int prom_root_node;
21
22/* Pointer to the device tree operations structure. */
23struct linux_nodeops *prom_nodeops;
24
25/* You must call prom_init() before you attempt to use any of the
26 * routines in the prom library.
27 * It gets passed the pointer to the PROM vector.
28 */
29
 
 
 
30void __init prom_init(struct linux_romvec *rp)
31{
32	romvec = rp;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
33
34	/* Initialization successful. */
35	return;
36}

 
 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 */
 7
 8#include <linux/kernel.h>
 9#include <linux/init.h>
10
11#include <asm/openprom.h>
12#include <asm/oplib.h>
13
14struct linux_romvec *romvec;
15enum prom_major_version prom_vers;
16unsigned int prom_rev, prom_prev;
17
18/* The root node of the prom device tree. */
19int prom_root_node;
20
21/* Pointer to the device tree operations structure. */
22struct linux_nodeops *prom_nodeops;
23
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.
27 */
28
29extern void prom_meminit(void);
30extern void prom_ranges_init(void);
31
32void __init prom_init(struct linux_romvec *rp)
33{
34	romvec = rp;
35#ifndef CONFIG_SUN3
36	switch(romvec->pv_romvers) {
37	case 0:
38		prom_vers = PROM_V0;
39		break;
40	case 2:
41		prom_vers = PROM_V2;
42		break;
43	case 3:
44		prom_vers = PROM_V3;
45		break;
46	case 4:
47		prom_vers = PROM_P1275;
48		prom_printf("PROMLIB: Sun IEEE Prom not supported yet\n");
49		prom_halt();
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) || (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#endif
74//	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
75//	       romvec->pv_romvers, prom_rev);
76
77	/* Initialization successful. */
78	return;
79}