/*      $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;
}