xref: /src/sys/arch/atari/atari/be_bus.c

/*	$NetBSD: be_bus.c,v 1.10 2008/12/27 16:14:12 tsutsui Exp $	*/

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Leo Weppelman.
 *
 * 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: be_bus.c,v 1.10 2008/12/27 16:14:12 tsutsui Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/cpu.h>
#include <machine/bus.h>

/*
 * This file contains the common functions for using a big endian (linear)
 * bus on a big endian atari.
 */

	/* Autoconf detection stuff */
static int		beb_bus_space_peek_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static int		beb_bus_space_peek_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static int		beb_bus_space_peek_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static int		beb_bus_space_peek_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));

	/* read (single) */
static u_int8_t		beb_bus_space_read_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static u_int16_t	beb_bus_space_read_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static u_int32_t	beb_bus_space_read_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));
static u_int64_t	beb_bus_space_read_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t));

	/* write (single) */
static void		beb_bus_space_write_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int8_t));
static void		beb_bus_space_write_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int16_t));
static void		beb_bus_space_write_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int32_t));
static void		beb_bus_space_write_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int64_t));

	/* read multiple */
static void		beb_bus_space_read_multi_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int8_t *,
				bus_size_t));
static void		beb_bus_space_read_multi_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int16_t *,
				bus_size_t));
static void		beb_bus_space_read_multi_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int32_t *,
				bus_size_t));
static void		beb_bus_space_read_multi_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int64_t *,
				bus_size_t));

	/* write multiple */
static void		beb_bus_space_write_multi_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int8_t *, bus_size_t));
static void		beb_bus_space_write_multi_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int16_t *, bus_size_t));
static void		beb_bus_space_write_multi_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int32_t *, bus_size_t));
static void		beb_bus_space_write_multi_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int64_t *, bus_size_t));

	/* read region */
static void		beb_bus_space_read_region_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int8_t *,
				bus_size_t));
static void		beb_bus_space_read_region_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int16_t *,
				bus_size_t));
static void		beb_bus_space_read_region_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int32_t *,
				bus_size_t));
static void		beb_bus_space_read_region_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int64_t *,
				bus_size_t));

	/* read region */
static void		beb_bus_space_write_region_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int8_t *, bus_size_t));
static void		beb_bus_space_write_region_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int16_t *, bus_size_t));
static void		beb_bus_space_write_region_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int32_t *, bus_size_t));
static void		beb_bus_space_write_region_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t,
				const u_int64_t *, bus_size_t));

	/* set multi */
static void		beb_bus_space_set_multi_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int8_t,
				bus_size_t));
static void		beb_bus_space_set_multi_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int16_t,
				bus_size_t));
static void		beb_bus_space_set_multi_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int32_t,
				bus_size_t));
static void		beb_bus_space_set_multi_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int64_t,
				bus_size_t));

	/* set region */
static void		beb_bus_space_set_region_1 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int8_t,
				bus_size_t));
static void		beb_bus_space_set_region_2 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int16_t,
				bus_size_t));
static void		beb_bus_space_set_region_4 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int32_t,
				bus_size_t));
static void		beb_bus_space_set_region_8 __P((bus_space_tag_t,
				bus_space_handle_t, bus_size_t, u_int64_t,
				bus_size_t));

/*
 * Don't force a function call overhead on these primitives...
 */
#define __read_1(h, o)		*((volatile u_int8_t  *)((h) + (o)))
#define __read_2(h, o)		*((volatile u_int16_t *)((h) + (o)))
#define __read_4(h, o)		*((volatile u_int32_t *)((h) + (o)))
#define __read_8(h, o)		*((volatile u_int64_t *)((h) + (o)))

#define __write_1(h, o, v)	*((volatile u_int8_t  *)((h) + (o))) = (v)
#define __write_2(h, o, v)	*((volatile u_int16_t *)((h) + (o))) = (v)
#define __write_4(h, o, v)	*((volatile u_int32_t *)((h) + (o))) = (v)
#define __write_8(h, o, v)	*((volatile u_int64_t *)((h) + (o))) = (v)

bus_space_tag_t
beb_alloc_bus_space_tag(storage)
bus_space_tag_t	storage;
{
	bus_space_tag_t	beb_t;

	/*
	 * Allow the caller to specify storage space for the tag. This
	 * is used during console config (when malloc() can't be used).
	 */
	if (storage != NULL)
		beb_t = storage;
	else {
	    if ((beb_t = malloc(sizeof(*beb_t), M_TEMP, M_NOWAIT)) == NULL)
		return(NULL);
	}
	bzero(beb_t, sizeof(*beb_t));

	beb_t->abs_p_1   = beb_bus_space_peek_1;
	beb_t->abs_p_2   = beb_bus_space_peek_2;
	beb_t->abs_p_4   = beb_bus_space_peek_4;
	beb_t->abs_p_8   = beb_bus_space_peek_8;
	beb_t->abs_r_1   = beb_bus_space_read_1;
	beb_t->abs_r_2   = beb_bus_space_read_2;
	beb_t->abs_r_4   = beb_bus_space_read_4;
	beb_t->abs_r_8   = beb_bus_space_read_8;
	beb_t->abs_rs_1  = beb_bus_space_read_1;
	beb_t->abs_rs_2  = beb_bus_space_read_2;
	beb_t->abs_rs_4  = beb_bus_space_read_4;
	beb_t->abs_rs_8  = beb_bus_space_read_8;
	beb_t->abs_rm_1  = beb_bus_space_read_multi_1;
	beb_t->abs_rm_2  = beb_bus_space_read_multi_2;
	beb_t->abs_rm_4  = beb_bus_space_read_multi_4;
	beb_t->abs_rm_8  = beb_bus_space_read_multi_8;
	beb_t->abs_rms_1 = beb_bus_space_read_multi_1;
	beb_t->abs_rms_2 = beb_bus_space_read_multi_2;
	beb_t->abs_rms_4 = beb_bus_space_read_multi_4;
	beb_t->abs_rms_8 = beb_bus_space_read_multi_8;
	beb_t->abs_rr_1  = beb_bus_space_read_region_1;
	beb_t->abs_rr_2  = beb_bus_space_read_region_2;
	beb_t->abs_rr_4  = beb_bus_space_read_region_4;
	beb_t->abs_rr_8  = beb_bus_space_read_region_8;
	beb_t->abs_rrs_1 = beb_bus_space_read_region_1;
	beb_t->abs_rrs_2 = beb_bus_space_read_region_2;
	beb_t->abs_rrs_4 = beb_bus_space_read_region_4;
	beb_t->abs_rrs_8 = beb_bus_space_read_region_8;
	beb_t->abs_w_1   = beb_bus_space_write_1;
	beb_t->abs_w_2   = beb_bus_space_write_2;
	beb_t->abs_w_4   = beb_bus_space_write_4;
	beb_t->abs_w_8   = beb_bus_space_write_8;
	beb_t->abs_ws_1  = beb_bus_space_write_1;
	beb_t->abs_ws_2  = beb_bus_space_write_2;
	beb_t->abs_ws_4  = beb_bus_space_write_4;
	beb_t->abs_ws_8  = beb_bus_space_write_8;
	beb_t->abs_wm_1  = beb_bus_space_write_multi_1;
	beb_t->abs_wm_2  = beb_bus_space_write_multi_2;
	beb_t->abs_wm_4  = beb_bus_space_write_multi_4;
	beb_t->abs_wm_8  = beb_bus_space_write_multi_8;
	beb_t->abs_wms_1 = beb_bus_space_write_multi_1;
	beb_t->abs_wms_2 = beb_bus_space_write_multi_2;
	beb_t->abs_wms_4 = beb_bus_space_write_multi_4;
	beb_t->abs_wms_8 = beb_bus_space_write_multi_8;
	beb_t->abs_wr_1  = beb_bus_space_write_region_1;
	beb_t->abs_wr_2  = beb_bus_space_write_region_2;
	beb_t->abs_wr_4  = beb_bus_space_write_region_4;
	beb_t->abs_wr_8  = beb_bus_space_write_region_8;
	beb_t->abs_wrs_1 = beb_bus_space_write_region_1;
	beb_t->abs_wrs_2 = beb_bus_space_write_region_2;
	beb_t->abs_wrs_4 = beb_bus_space_write_region_4;
	beb_t->abs_wrs_8 = beb_bus_space_write_region_8;
	beb_t->abs_sm_1  = beb_bus_space_set_multi_1;
	beb_t->abs_sm_2  = beb_bus_space_set_multi_2;
	beb_t->abs_sm_4  = beb_bus_space_set_multi_4;
	beb_t->abs_sm_8  = beb_bus_space_set_multi_8;
	beb_t->abs_sr_1  = beb_bus_space_set_region_1;
	beb_t->abs_sr_2  = beb_bus_space_set_region_2;
	beb_t->abs_sr_4  = beb_bus_space_set_region_4;
	beb_t->abs_sr_8  = beb_bus_space_set_region_8;

	return(beb_t);
}


/*
 * The various access functions
 */

/*
 *	int bus_space_peek_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t sh, bus_size_t offset));
 *
 * Check if the address is suitable for reading N-byte quantities.
 */
static int
beb_bus_space_peek_1(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(!badbaddr((void *)(h + o), 1));
}

static int
beb_bus_space_peek_2(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(!badbaddr((void *)(h + o), 2));
}

static int
beb_bus_space_peek_4(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(!badbaddr((void *)(h + o), 4));
}

static int
beb_bus_space_peek_8(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(!badbaddr((void *)(h + o), 8));
}

/*
 *	u_intX_t bus_space_read_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset));
 *
 * Return an 1, 2, 4, or 8 byte value read from the bus_space described
 * by tag/handle at `offset'. The value is converted to host-endian.
 */
static u_int8_t
beb_bus_space_read_1(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(__read_1(h, o));
}

static u_int16_t
beb_bus_space_read_2(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(__read_2(h, o));
}

static u_int32_t
beb_bus_space_read_4(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(__read_4(h, o));
}

static u_int64_t
beb_bus_space_read_8(t, h, o)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
{
    return(__read_8(h, o));
}

/*
 *	u_intX_t bus_space_write_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset, u_intX_t val));
 *
 * Write an 1, 2, 4, or 8 byte value to the bus_space described by tag/handle
 * at `offset'. The value `val' is converted from host to bus endianness
 * before being written.
 */
static void
beb_bus_space_write_1(t, h, o, v)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
    u_int8_t		v;
{
    __write_1(h, o, v);
}

static void
beb_bus_space_write_2(t, h, o, v)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
    u_int16_t		v;
{
    __write_2(h, o, v);
}

static void
beb_bus_space_write_4(t, h, o, v)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
    u_int32_t		v;
{
    __write_4(h, o, v);
}

static void
beb_bus_space_write_8(t, h, o, v)
    bus_space_tag_t	t;
    bus_space_handle_t	h;
    bus_size_t		o;
    u_int64_t		v;
{
    __write_8(h, o, v);
}

/*
 *	void bus_space_read_multi_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset, u_intX_t *address,
 *	 	bus_size_t count));
 *
 * Read 'count' 1, 2, 4, or 8 byte values from the bus_space described by
 * tag/handle at `offset' and store them in the address range starting at
 * 'address'. The values are converted to CPU endian order before being
 * being stored.
 */
static void
beb_bus_space_read_multi_1(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int8_t		*a;
{
	for (; c; a++, c--)
		*a = __read_1(h, o);
}
static void
beb_bus_space_read_multi_2(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int16_t		*a;
{
	for (; c; a++, c--)
		*a = __read_2(h, o);
}

static void
beb_bus_space_read_multi_4(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int32_t		*a;
{
	for (; c; a++, c--)
		*a = __read_4(h, o);
}

static void
beb_bus_space_read_multi_8(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int64_t		*a;
{
	for (; c; a++, c--)
		*a = __read_8(h, o);
}

/*
 *	void bus_space_write_multi_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset,
 *		const u_intX_t *address, bus_size_t count));
 *
 * Write 'count' 1, 2, 4, or 8 byte values from the address range starting
 * at 'address' to the bus_space described by tag/handle at `offset'.
 * The values are converted to bus endian order before being written to
 * the bus.
 */
static void
beb_bus_space_write_multi_1(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int8_t		*a;
{
	for (; c; a++, c--)
		__write_1(h, o, *a);
}

static void
beb_bus_space_write_multi_2(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int16_t		*a;
{
	for (; c; a++, c--)
		__write_2(h, o, *a);
}

static void
beb_bus_space_write_multi_4(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int32_t		*a;
{
	for (; c; a++, c--)
		__write_4(h, o, *a);
}

static void
beb_bus_space_write_multi_8(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int64_t		*a;
{
	for (; c; a++, c--)
		__write_8(h, o, *a);
}

/*
 *	void bus_space_read_region_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset,
 *		u_intN_t *addr, bus_size_t count));
 *
 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
 * described by tag/handle and starting at `offset' and copy into
 * buffer provided.
 */
static void
beb_bus_space_read_region_1(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int8_t		*a;
{
	for (; c; a++, o++, c--)
		*a = __read_1(h, o);
}

static void
beb_bus_space_read_region_2(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int16_t		*a;
{
	for (; c; a++, o += 2, c--)
		*a = __read_2(h, o);
}

static void
beb_bus_space_read_region_4(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int32_t		*a;
{
	for (; c; a++, o += 4, c--)
		*a = __read_4(h, o);
}

static void
beb_bus_space_read_region_8(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int64_t		*a;
{
	for (; c; a++, o += 8, c--)
		*a = __read_8(h, o);
}

/*
 *	void bus_space_write_region_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset,
 *		u_intN_t *addr, bus_size_t count));
 *
 * Copy `count' 1, 2, 4, or 8 byte quantities from the buffer provided
 * into the bus space described by tag/handle and starting at `offset'.
 */
static void
beb_bus_space_write_region_1(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int8_t		*a;
{
	for (; c; a++, o++, c--)
		__write_1(h, o, *a);
}

static void
beb_bus_space_write_region_2(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int16_t		*a;
{
	for (; c; a++, o += 2, c--)
		__write_2(h, o, *a);
}

static void
beb_bus_space_write_region_4(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int32_t		*a;
{
	for (; c; a++, o += 4, c--)
		__write_4(h, o, *a);
}

static void
beb_bus_space_write_region_8(t, h, o, a, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	const u_int64_t		*a;
{
	for (; c; a++, o += 8, c--)
		__write_8(h, o, *a);
}

/*
 *	void bus_space_set_multi_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
 *		bus_size_t count));
 *
 * Write the 1, 2, 4, or 8 byte value `val' to bus space described
 * by tag/handle/offset `count' times.
 */

static void
beb_bus_space_set_multi_1(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int8_t		v;
{
	for (; c; c--)
		__write_1(h, o, v);
}

static void
beb_bus_space_set_multi_2(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int16_t		v;
{
	for (; c; c--)
		__write_2(h, o, v);
}

static void
beb_bus_space_set_multi_4(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int32_t		v;
{
	for (; c; c--)
		__write_4(h, o, v);
}

static void
beb_bus_space_set_multi_8(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int64_t		v;
{
	for (; c; c--)
		__write_8(h, o, v);
}

/*
 *	void bus_space_set_region_N __P((bus_space_tag_t tag,
 *		bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
 *		bus_size_t count));
 *
 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
 * by tag/handle starting at `offset'.
 */
static void
beb_bus_space_set_region_1(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int8_t		v;
{
	for (; c; o++, c--)
		__write_1(h, o, v);
}

static void
beb_bus_space_set_region_2(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int16_t		v;
{
	for (; c; o += 2, c--)
		__write_2(h, o, v);
}

static void
beb_bus_space_set_region_4(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int32_t		v;
{
	for (; c; o += 4, c--)
		__write_4(h, o, v);
}

static void
beb_bus_space_set_region_8(t, h, o, v, c)
	bus_space_tag_t		t;
	bus_space_handle_t	h;
	bus_size_t		o, c;
	u_int64_t		v;
{
	for (; c; o += 8, c--)
		__write_8(h, o, v);
}