/* $NetBSD: mainbus.c,v 1.37 2021/08/07 16:18:40 thorpej Exp $ */

/*
 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * 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>                  /* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.37 2021/08/07 16:18:40 thorpej Exp $");

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

#include <machine/alpha.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/cpuconf.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);

/* There can be only one. */
int     mainbus_found;

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

        if (mainbus_found)
                return (0);

        return (1);
}

static void
mbattach(device_t parent, device_t self, void *aux)
{
        struct mainbus_attach_args ma;
        struct pcs *pcsp;
        int i, cpuattachcnt;
        extern int ncpus;

        mainbus_found = 1;

        printf("\n");

        /*
         * Try to find and attach all of the CPUs in the machine.
         */
        cpuattachcnt = 0;
        for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
                pcsp = LOCATE_PCS(hwrpb, i);
                if ((pcsp->pcs_flags & PCS_PP) == 0)
                        continue;

                ma.ma_name = "cpu";
                ma.ma_slot = i;
                if (config_found(self, &ma, mbprint, CFARGS_NONE) != NULL)
                        cpuattachcnt++;
        }
        if (ncpus != cpuattachcnt)
                printf("WARNING: %d cpus in machine, %d attached\n",
                        ncpus, cpuattachcnt);

        /* Patch-up any routines based on architecture features. */
        alpha_patch(false);

        if (alpha_is_qemu) {
                ma.ma_name = "qemu";
                ma.ma_slot = 0;                 /* meaningless */
                config_found(self, &ma, mbprint, CFARGS_NONE);
        }

        if (platform.iobus != NULL) {
                ma.ma_name = platform.iobus;
                ma.ma_slot = 0;                 /* meaningless */
                config_found(self, &ma, mbprint, CFARGS_NONE);
        }
}

static int
mbprint(void *aux, const char *pnp)
{
        struct mainbus_attach_args *ma = aux;

        if (pnp)
                aprint_normal("%s at %s", ma->ma_name, pnp);

        return (UNCONF);
}