/*      $NetBSD: rmixl_mainbus.c,v 1.8 2022/09/29 07:00:47 skrll Exp $  */

/*
 * Copyright (c) 1994,1995 Mark Brinicombe.
 * Copyright (c) 1994 Brini.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Brini.
 * 4. The name of the company nor the name of the author may be used to
 *    endorse or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * RiscBSD kernel project
 *
 * mainbus.c
 *
 * mainbus configuration
 *
 * Created      : 15/12/94
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rmixl_mainbus.c,v 1.8 2022/09/29 07:00:47 skrll Exp $");

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

#include <evbmips/rmixl/autoconf.h>
#include <sys/bus.h>
#include "locators.h"

static int  mainbusmatch(device_t,  cfdata_t, void *);
static void mainbusattach(device_t,  device_t,  void *);
static int  mainbus_node_alloc(struct mainbus_softc *, int);
static int  mainbus_search(device_t, cfdata_t, const int *, void *);
static int  mainbus_print(void *, const char *);

CFATTACH_DECL_NEW(mainbus, sizeof(struct mainbus_softc),
        mainbusmatch, mainbusattach, NULL, NULL);

static int mainbus_found;

static int
mainbusmatch(device_t parent, cfdata_t cf, void *aux)
{
        if (mainbus_found)
                return 0;
        return 1;
}

static void
mainbusattach(device_t parent, device_t self, void *aux)
{
        struct mainbus_softc *sc = device_private(self);

        aprint_naive("\n");
        aprint_normal("\n");

        sc->sc_dev = self;
        sc->sc_node_next = 0;
        sc->sc_node_mask = 0;

        mainbus_found = 1;

        /*
         * attach mainbus devices
         */
        config_search(self, NULL,
            CFARGS(.search = mainbus_search));
}

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

        if (pnp != NULL)
                aprint_normal("%s:", pnp);
        aprint_normal(" node %d", ma->ma_node);

        return (UNCONF);
}

static int
mainbus_node_alloc(struct mainbus_softc *sc, int node)
{
        uint64_t bit;

        if (node == MAINBUSCF_NODE_DEFAULT) {
                for (node=sc->sc_node_next; node < 64; node++) {
                        bit = 1 << node;
                        if ((sc->sc_node_mask & bit) == 0) {
                                sc->sc_node_mask |= bit;
                                sc->sc_node_next = node + 1;
                                return node;
                        }
                }
                panic("%s: node mask underflow", __func__);
        } else {
                if (node >= 64)
                        panic("%s: node >= 64", __func__);
                if (node < 0)
                        panic("%s: bad node %d", __func__, node);
                bit = 1 << node;
                if ((sc->sc_node_mask & bit) == 0) {
                        sc->sc_node_mask |= bit;
                        sc->sc_node_next = node + 1;
                        return node;
                } else {
                        panic("%s: node %d already used\n",
                                __func__, node);
                }
        }

        /*NOTREACHED*/
        return -1;      /* as if */
}

static int
mainbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
        struct mainbus_softc *sc = device_private(parent);
        struct mainbus_attach_args ma;

        ma.ma_node = mainbus_node_alloc(sc, cf->cf_loc[MAINBUSCF_NODE]);

        if (config_probe(parent, cf, &ma))
                config_attach(parent, cf, &ma, mainbus_print, CFARGS_NONE);

        return 0;
}