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Initial revision

/*	$OpenBSD: rbus_machdep.c,v 1.18 2006/09/19 11:06:33 jsg Exp $ */
/*	$NetBSD: rbus_machdep.c,v 1.2 1999/10/15 06:43:06 haya Exp $	*/

/*
 * Copyright (c) 1999
 *     HAYAKAWA Koichi.  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 HAYAKAWA Koichi.
 * 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 "pcibios.h"

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

#include <uvm/uvm_extern.h>

#include <sys/sysctl.h>

#include <sys/device.h>

#include <machine/bus.h>
#include <dev/cardbus/rbus.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>

#include <dev/pci/pcivar.h>
#include <arch/i386/pci/pcibiosvar.h>


/**********************************************************************
 * rbus_tag_t rbus_fakeparent_mem(struct pci_attach_args *pa)
 *
 *   This function makes an rbus tag for memory space.  This rbus tag
 *   shares the all memory region of ex_iomem.
 **********************************************************************/
#define RBUS_MEM_START	0x40000000
#define RBUS_MEM_SIZE	0x00100000

rbus_tag_t
rbus_pccbb_parent_mem(struct device *self, struct pci_attach_args *pa)
{
	bus_addr_t start, min_start;
	bus_size_t size;
	struct extent *ex;

	size = RBUS_MEM_SIZE;
	start = min_start = max(RBUS_MEM_START, ctob(physmem));
#if NPCIBIOS > 0
	if ((ex = pciaddr_search(PCIADDR_SEARCH_MEM, &start, size)) == NULL)
#endif
	{
		extern struct extent *iomem_ex;
		ex = iomem_ex;
		start = ex->ex_start;

		/* XXX: unfortunately, iomem_ex cannot be used for the
		 * dynamic bus_space allocatoin.  There are some
		 * hidden memory (or some obstacles which do not
		 * recognised by the kernel) in the region governed by
		 * iomem_ex.  So I decide to use only very high
		 * address region.
		 *
		 * if defined PCIBIOS_ADDR_FIXUP, PCI device using
		 * area which is not recognised by the kernel are
		 * already reserved.
		 */

		if (start < min_start) {
			start = min_start;
		}

		size = ex->ex_end - start;
	}

	return rbus_new_root_share(pa->pa_memt, ex, start, size, 0);
}


/**********************************************************************
 * rbus_tag_t rbus_pccbb_parent_io(struct pci_attach_args *pa)
 **********************************************************************/
#define RBUS_IO_START	0xa000
#define RBUS_IO_SIZE	0x1000

rbus_tag_t
rbus_pccbb_parent_io(struct device *self, struct pci_attach_args *pa)
{
	struct extent *ex;
	bus_addr_t start;
	bus_size_t size;

	size =  RBUS_IO_SIZE;
	start = RBUS_IO_START;
#if NPCIBIOS > 0
	if ((ex = pciaddr_search(PCIADDR_SEARCH_IO, &start, size)) == NULL)
#endif
	{
		extern struct extent *ioport_ex;
		ex = ioport_ex;
	}

	return rbus_new_root_share(pa->pa_iot, ex, start, size, 0);
}