/*	$OpenBSD: mainbus.c,v 1.2 2009/03/01 21:39:59 miod Exp $ */
/*
 * Copyright (c) 1998 Steve Murphree, Jr.
 * Copyright (c) 2004, Miodrag Vallat.
 *
 * 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 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/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/extent.h>

#include <uvm/uvm_extern.h>

#include <machine/bus.h>
#include <machine/autoconf.h>

void	mainbus_attach(struct device *, struct device *, void *);
int 	mainbus_match(struct device *, void *, void *);
int	mainbus_print(void *, const char *);
int	mainbus_scan(struct device *, void *, void *);

/*
 * bus_space routines for 1:1 obio mappings
 */

int	mainbus_map(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
void	mainbus_unmap(bus_space_handle_t, bus_size_t);
int	mainbus_subregion(bus_space_handle_t, bus_size_t, bus_size_t,
	    bus_space_handle_t *);
void	*mainbus_vaddr(bus_space_handle_t);

const struct mvme68k_bus_space_tag mainbus_bustag = {
	mainbus_map,
	mainbus_unmap,
	mainbus_subregion,
	mainbus_vaddr
};

extern struct extent *iomap_extent;
extern struct vm_map *iomap_map;

/*
 * Internal IO space (iiomapsize).
 *
 * Internal IO space is mapped in the kernel from ``intiobase'' to
 * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
 * conversion between physical and kernel virtual addresses is easy.
 */
#if 0	/* in <machine/cpu.h> for now */
#define	ISIIOVA(va) \
	((va) >= intiobase && (va) < intiolimit)
#define	IIOV(pa)	((pa) - iiomapbase + intiobase)
#define	IIOP(va)	((va) - intiobase + iiomapbase)
#define	IIOPOFF(pa)	((pa) - iiomapbase)
#endif
#define	ISIIOPA(pa)	((uint)IIOPOFF(pa) < ptoa(iiomapsize))

int
mainbus_map(bus_addr_t addr, bus_size_t size, int flags,
    bus_space_handle_t *ret)
{
	if (ISIIOPA(addr)) {
		*ret = (bus_space_handle_t)IIOV(addr);
		return (0);
	} else
		return (ENOMEM);
}

void
mainbus_unmap(bus_space_handle_t handle, bus_size_t size)
{
}

int
mainbus_subregion(bus_space_handle_t handle, bus_addr_t offset,
    bus_size_t size, bus_space_handle_t *ret)
{
	*ret = handle + offset;
	return (0);
}

void *
mainbus_vaddr(bus_space_handle_t handle)
{
	return (void *)handle;
}

/*
 * Configuration glue
 */

struct cfattach mainbus_ca = {
	sizeof(struct device), mainbus_match, mainbus_attach
};

struct cfdriver mainbus_cd = {
	NULL, "mainbus", DV_DULL
};

int
mainbus_match(parent, cf, args)
	struct device *parent;
	void *cf;
	void *args;
{
	return (1);
}

int
mainbus_print(args, bus)
	void *args;
	const char *bus;
{
	struct confargs *ca = args;

	if (ca->ca_paddr != (paddr_t)-1)
		printf(" addr 0x%x", ca->ca_paddr);
	return (UNCONF);
}

int
mainbus_scan(parent, child, args)
	struct device *parent;
	void *child, *args;
{
	struct cfdata *cf = child;
	struct confargs oca;

	bzero(&oca, sizeof oca);
	oca.ca_iot = &mainbus_bustag;
	oca.ca_dmat = 0;	/* XXX no need for a meaningful value yet */
	oca.ca_paddr = cf->cf_loc[0];
	oca.ca_vaddr = (vaddr_t)-1;	/* XXX until it dies */
	oca.ca_ipl = -1;
	oca.ca_bustype = BUS_MAIN;
	oca.ca_name = cf->cf_driver->cd_name;
	if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
		return (0);
	config_attach(parent, cf, &oca, mainbus_print);
	return (1);
}

void
mainbus_attach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	printf("\n");

	/* XXX
	 * should have a please-attach-first list for mainbus,
	 * to ensure that the pcc/vme2/mcc chips are attached
	 * first.
	 */

	(void)config_search(mainbus_scan, self, args);
}