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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;

}