/*      $NetBSD: autoconf.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $    */
/*-
* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
* Agency and which was developed by Matt Thomas of 3am Software Foundry.
*
* This material is based upon work supported by the Defense Advanced Research
* Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
* Contract No. N66001-09-C-2073.
* Approved for Public Release, Distribution Unlimited
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $");

#define __INTR_PRIVATE

#include "locators.h"

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

#include <powerpc/booke/cpuvar.h>

/*
* Determine device configuration for a machine.
*/
void
cpu_configure(void)
{

       intr_init();
       calc_delayconst();

       if (config_rootfound("mainbus", NULL) == NULL)
               panic("%s: mainbus not configured", __func__);

       spl0();
}

static volatile int rootconf_timo = 1;

/*
* Setup root device.
* Configure swap area.
*/
void
cpu_rootconf(void)
{
       /*
        * We wait up to 10 seconds for a bootable device to be found.
        */
       while (rootconf_timo > 0) {
               if (booted_device != NULL) {
                       aprint_normal_dev(booted_device, "boot device\n");
                       break;
               }

               if (root_string[0] != '\0'
                   && (booted_device = device_find_by_xname(root_string)) != NULL) {
                       aprint_normal_dev(booted_device, "boot device\n");
                       break;
               }

               if (EWOULDBLOCK == kpause("autoconf", true, 1, NULL)) {
                       rootconf_timo--;
               }
       }

       rootconf();
}

void
device_register(device_t dev, void *aux)
{
       if (cpu_md_ops.md_device_register != NULL)
               (*cpu_md_ops.md_device_register)(dev, aux);

       if (booted_device == NULL) {
               if (root_string[0] != '\0'
                   && !strcmp(device_xname(dev), root_string)) {
                       aprint_normal_dev(dev, "boot device\n");
                       booted_device = dev;
               } else {
                       rootconf_timo = 5 * hz;
               }
       }
}

static bool mainbus_found;

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

       if (pnp != NULL)
               return QUIET;

       if (pnp)
               aprint_normal("%s at %s", ma->ma_name, pnp);
       if (ma->ma_node != MAINBUSCF_NODE_DEFAULT)
               aprint_normal(" node %d", ma->ma_node);

       return (UNCONF);
}

static int
mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
       return mainbus_found == false;
}

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

       mainbus_found = true;

       aprint_normal("\n");

       ma.ma_name = "cpunode";
       ma.ma_node = 0;
       ma.ma_memt = curcpu()->ci_softc->cpu_bst;
       ma.ma_le_memt = curcpu()->ci_softc->cpu_le_bst;
       ma.ma_dmat = &booke_bus_dma_tag;

       config_found(self, &ma, mainbus_print, CFARGS_NONE);
}

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