[linux.git] / arch / sparc / prom / init_32.c

/*
 * init.c:  Initialize internal variables used by the PROM
 *          library functions.
 *
 * Copyright (C) 1995 David S. Miller ([email protected])
 * Copyright (C) 1998 Jakub Jelinek ([email protected])
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>

#include <asm/openprom.h>
#include <asm/oplib.h>

struct linux_romvec *romvec;
EXPORT_SYMBOL(romvec);

enum prom_major_version prom_vers;
unsigned int prom_rev, prom_prev;

/* The root node of the prom device tree. */
phandle prom_root_node;
EXPORT_SYMBOL(prom_root_node);

/* Pointer to the device tree operations structure. */
struct linux_nodeops *prom_nodeops;

/* You must call prom_init() before you attempt to use any of the
 * routines in the prom library.  It returns 0 on success, 1 on
 * failure.  It gets passed the pointer to the PROM vector.
 */

extern void prom_meminit(void);
extern void prom_ranges_init(void);

void __init prom_init(struct linux_romvec *rp)
{
	romvec = rp;

	switch(romvec->pv_romvers) {
	case 0:
		prom_vers = PROM_V0;
		break;
	case 2:
		prom_vers = PROM_V2;
		break;
	case 3:
		prom_vers = PROM_V3;
		break;
	default:
		prom_printf("PROMLIB: Bad PROM version %d\n",
			    romvec->pv_romvers);
		prom_halt();
		break;
	}

	prom_rev = romvec->pv_plugin_revision;
	prom_prev = romvec->pv_printrev;
	prom_nodeops = romvec->pv_nodeops;

	prom_root_node = prom_getsibling(0);
	if ((prom_root_node == 0) || ((s32)prom_root_node == -1))
		prom_halt();

	if((((unsigned long) prom_nodeops) == 0) || 
	   (((unsigned long) prom_nodeops) == -1))
		prom_halt();

	prom_meminit();

	prom_ranges_init();

	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
	       romvec->pv_romvers, prom_rev);

	/* Initialization successful. */
}
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	2	* init.c: Initialize internal variables used by the PROM
	3	* library functions.
	4	*
	5	* Copyright (C) 1995 David S. Miller ([email protected])
	6	* Copyright (C) 1998 Jakub Jelinek ([email protected])
	7	*/
	8
1da177e4 LT	9	#include <linux/kernel.h>
1da177e4 LT	10	#include <linux/init.h>
6943f3da	11	#include <linux/module.h>
1da177e4 LT	12
	13	#include <asm/openprom.h>
	14	#include <asm/oplib.h>
1da177e4 LT	15
1da177e4 LT	16	struct linux_romvec *romvec;
6943f3da SR	17	EXPORT_SYMBOL(romvec);
6943f3da SR	18
1da177e4 LT	19	enum prom_major_version prom_vers;
1da177e4 LT	20	unsigned int prom_rev, prom_prev;
1da177e4 LT	21
1da177e4 LT	22	/* The root node of the prom device tree. */
8d125562	23	phandle prom_root_node;
6943f3da	24	EXPORT_SYMBOL(prom_root_node);
1da177e4	25
1da177e4 LT	26	/* Pointer to the device tree operations structure. */
	27	struct 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
	34	extern void prom_meminit(void);
	35	extern void prom_ranges_init(void);
	36
	37	void __init prom_init(struct linux_romvec *rp)
	38	{
1da177e4 LT	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;
1da177e4 LT	51	default:
	52	prom_printf("PROMLIB: Bad PROM version %d\n",
	53	romvec->pv_romvers);
	54	prom_halt();
	55	break;
6cb79b3f	56	}
1da177e4 LT	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);
4a3a2552	63	if ((prom_root_node == 0) \|\| ((s32)prom_root_node == -1))
1da177e4 LT	64	prom_halt();
	65
	66	if((((unsigned long) prom_nodeops) == 0) \|\|
	67	(((unsigned long) prom_nodeops) == -1))
	68	prom_halt();
	69
1da177e4 LT	70	prom_meminit();
	71
	72	prom_ranges_init();
	73
1da177e4 LT	74	printk("PROMLIB: Sun Boot Prom Version %d Revision %d\n",
1da177e4 LT	75	romvec->pv_romvers, prom_rev);
1da177e4 LT	76
1da177e4 LT	77	/* Initialization successful. */
1da177e4	78	}