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/* $Id: init.c,v 1.1 2005-12-20 09:49:32 jcastillo Exp $
 * init.c:  Initialize internal variables used by the PROM
 *          library functions.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */
 
#include <linux/config.h>
#include <linux/kernel.h>
 
#include <asm/openprom.h>
#include <asm/oplib.h>
 
struct linux_romvec *romvec;
enum prom_major_version prom_vers;
unsigned int prom_rev, prom_prev;
 
/* The root node of the prom device tree. */
int 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
prom_init(struct linux_romvec *rp)
{
	romvec = rp;
 
#if CONFIG_AP1000
        prom_vers = PROM_AP1000;
        prom_meminit();
        prom_ranges_init();
	return;
#endif
	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;
	case 4:
		prom_vers = PROM_P1275;
		prom_printf("PROMLIB: Sun IEEE Prom not supported yet\n");
		prom_halt();
		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) || (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. */
	return;
}