/* $NetBSD: mainbus.c,v 1.44 2021/08/07 16:19:02 thorpej Exp $ */

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * DECstation port: Jonathan Stone
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.44 2021/08/07 16:19:02 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <pmax/sysconf.h>
#include <pmax/autoconf.h>

/* Definition of the mainbus driver. */
static int      mbmatch(device_t, cfdata_t, void *);
static void     mbattach(device_t, device_t, void *);
static int      mbprint(void *, const char *);

CFATTACH_DECL_NEW(mainbus, 0,
    mbmatch, mbattach, NULL, NULL);

static int mainbus_found;

static int
mbmatch(device_t parent, cfdata_t cf, void *aux)
{

        if (mainbus_found)
                return 0;

        return 1;
}

int ncpus = 0;  /* only support uniprocessors, for now */

static void
mbattach(device_t parent, device_t self, void *aux)
{
        struct mainbus_attach_args ma;

        mainbus_found = 1;

        aprint_normal("\n");

        /*
         * if we ever support multi-processor DECsystem (5800 family),
         * the Alpha port's mainbus.c has an example of attaching
         * multiple CPUs.
         *
         * For now, we only have one. Attach it directly.
         */
        ma.ma_name = "cpu";
        ma.ma_slot = 0;
        config_found(self, &ma, mbprint, CFARGS_NONE);

        ma.ma_name = platform.iobus;
        ma.ma_slot = 0;
        config_found(self, &ma, mbprint, CFARGS_NONE);
}

static int
mbprint(void *aux, const char *pnp)
{

        if (pnp)
                return QUIET;
        return UNCONF;
}