/*      $NetBSD: mainbus.c,v 1.27 2025/10/03 01:04:19 thorpej Exp $     */

/*
 * Copyright (c) 1996 Christopher G. Demetriou.  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 Christopher G. Demetriou
 *      for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.27 2025/10/03 01:04:19 thorpej Exp $");

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

#include <dev/pci/pcivar.h>
#include <dev/ofw/openfirm.h>

#include <machine/autoconf.h>

#include <powerpc/pic/picvar.h>

int     mainbus_match(device_t, cfdata_t, void *);
void    mainbus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(mainbus, 0,
    mainbus_match, mainbus_attach, NULL, NULL);

/*
 * Probe for the mainbus; always succeeds.
 */
int
mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
        return 1;
}

/*
 * Attach the mainbus.
 */
void
mainbus_attach(device_t parent, device_t self, void *aux)
{
        struct ofbus_attach_args oba;
        struct confargs ca;
        int node, cpus, i;
        u_int32_t reg[4];
        char name[32];

        node = OF_finddevice("/");
        if (node) {
                if (OF_getprop(node, "model", name, sizeof(name)) > 0) {
                        aprint_normal(": %s\n", name);
                } else {
                        node = 0;
                }
        }
        if (node == 0) {
                aprint_normal("\n");
        }
        aprint_naive("\n");

        devhandle_t selfh = device_handle(self);

        cpus = OF_finddevice("/cpus");
        /*
         * XXX
         * the canonical error value is -1 but I dimly remember some OF
         * variants returning 0 here, so check for both just in case.
         * It's not like this is a performance critical path.
         */
        if ((cpus != -1) && (cpus != 0)) {
                node = OF_child(cpus);
                while (node != 0) {
                        ca.ca_name = "cpu";
                        ca.ca_reg = reg;
                        ca.ca_nreg = OF_getprop(node, "reg", reg, sizeof(reg));
                        config_found(self, &ca, NULL,
                            CFARGS(.devhandle = devhandle_from_of(selfh,
                                                                  node)));
                        node = OF_peer(node);
                }                       
        } else {
                for (i = 0; i < 2; i++) {
                        ca.ca_name = "cpu";
                        ca.ca_reg = reg;
                        reg[0] = i;
                        config_found(self, &ca, NULL, CFARGS_NONE);
                }
        }

        pic_finish_setup();

        node = OF_peer(0);
        if (node) {
                oba.oba_busname = "ofw";
                oba.oba_phandle = node;
                config_found(self, &oba, NULL,
                    CFARGS(.devhandle = devhandle_from_of(selfh, node)));
        }

        for (node = OF_child(OF_finddevice("/")); node; node = OF_peer(node)) {
                memset(name, 0, sizeof(name));
                if (OF_getprop(node, "name", name, sizeof(name)) == -1)
                        continue;

                ca.ca_name = name;
                ca.ca_node = node;
                ca.ca_nreg = OF_getprop(node, "reg", reg, sizeof(reg));
                ca.ca_reg  = reg;
                config_found(self, &ca, NULL,
                    CFARGS(.devhandle = devhandle_from_of(selfh, node)));
        }

#ifdef MAMBO
        ca.ca_name="com";
        config_found(self, &ca, NULL, CFARGS_NONE);
#endif

}