NetBSD/sys/arch/hp300/include/bus.h

/*	$NetBSD: bus.h,v 1.14 2006/11/16 01:32:38 christos Exp $	*/

/*-
 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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 the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * Copyright (C) 1997 Scott Reynolds.  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. 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.
 */

#ifndef _HP300_BUS_H_
#define _HP300_BUS_H_

/*
 * Values for the hp300 bus space tag, not to be used directly by MI code.
 */
#define	HP300_BUS_SPACE_INTIO	0	/* space is intio space */
#define	HP300_BUS_SPACE_DIO	1	/* space is dio space */

/*
 * Bus address and size types
 */
typedef u_long bus_addr_t;
typedef u_long bus_size_t;

/*
 * Access methods for bus resources and address space.
 */
typedef struct bus_space_tag *bus_space_tag_t;
typedef u_long bus_space_handle_t;

/*
 * Implementation specific structures.
 * XXX Don't use outside of bus_space definitions!
 * XXX maybe this should be encapsuled in a non-global .h file?
 */

struct bus_space_tag {
	u_int		bustype;

	uint8_t		(*bsr1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t);
	uint16_t	(*bsr2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t);
	uint32_t	(*bsr4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t);
	void		(*bsrm1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint8_t *, bus_size_t);
	void		(*bsrm2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint16_t *, bus_size_t);
	void		(*bsrm4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint32_t *, bus_size_t);
	void		(*bsrr1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint8_t *, bus_size_t);
	void		(*bsrr2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint16_t *, bus_size_t);
	void		(*bsrr4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint32_t *, bus_size_t);
	void		(*bsw1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint8_t);
	void		(*bsw2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint16_t);
	void		(*bsw4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint32_t);
	void		(*bswm1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, const uint8_t *, bus_size_t);
	void		(*bswm2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, const uint16_t *, bus_size_t);
	void		(*bswm4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, const uint32_t *, bus_size_t);
	void		(*bswr1)(bus_space_tag_t, bus_space_handle_t ,
			    bus_size_t, const uint8_t *, bus_size_t);
	void		(*bswr2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, const uint16_t *, bus_size_t);
	void		(*bswr4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, const uint32_t *, bus_size_t);
	void		(*bssm1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint8_t, bus_size_t);
	void		(*bssm2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint16_t, bus_size_t);
	void		(*bssm4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint32_t, bus_size_t);
	void		(*bssr1)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint8_t, bus_size_t);
	void		(*bssr2)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint16_t, bus_size_t);
	void		(*bssr4)(bus_space_tag_t, bus_space_handle_t,
			    bus_size_t, uint32_t, bus_size_t);
};

/*
 *	int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
 *	    bus_size_t size, int flags, bus_space_handle_t *bshp);
 *
 * Map a region of bus space.
 */

#define	BUS_SPACE_MAP_CACHEABLE		0x01
#define	BUS_SPACE_MAP_LINEAR		0x02
#define	BUS_SPACE_MAP_PREFETCHABLE	0x04

int	bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t,
	    int, bus_space_handle_t *);

/*
 *	void bus_space_unmap(bus_space_tag_t t,
 *	    bus_space_handle_t bsh, bus_size_t size);
 *
 * Unmap a region of bus space.
 */

void	bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t);

/*
 *	int bus_space_subregion(bus_space_tag_t t,
 *	    bus_space_handle_t bsh, bus_size_t offset, bus_size_t size,
 *	    bus_space_handle_t *nbshp);
 *
 * Get a new handle for a subregion of an already-mapped area of bus space.
 */

int	bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
	    bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp);

/*
 *	int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart,
 *	    bus_addr_t rend, bus_size_t size, bus_size_t align,
 *	    bus_size_t boundary, int flags, bus_addr_t *addrp,
 *	    bus_space_handle_t *bshp);
 *
 * Allocate a region of bus space.
 */

int	bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart,
	    bus_addr_t rend, bus_size_t size, bus_size_t align,
	    bus_size_t boundary, int cacheable, bus_addr_t *addrp,
	    bus_space_handle_t *bshp);

/*
 *	int bus_space_free(bus_space_tag_t t,
 *	    bus_space_handle_t bsh, bus_size_t size);
 *
 * Free a region of bus space.
 */

void	bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
	    bus_size_t size);

/*
 *	void *bus_space_vaddr(bus_space_tag_t, bus_space_handle_t);
 *
 * Get the kernel virtual address for the mapped bus space.
 * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR.
 *  (XXX not enforced)
 */
#define bus_space_vaddr(t, h)	(void *)(h)

/*
 *	int hp300_bus_space_probe(bus_space_tag_t t,
 *	    bus_space_handle_t bsh, bus_size_t offset, int sz);
 *
 * Probe the bus at t/bsh/offset, using sz as the size of the load.
 *
 * This is a machine-dependent extension, and is not to be used by
 * machine-independent code.
 */

int	hp300_bus_space_probe(bus_space_tag_t t,
	    bus_space_handle_t bsh, bus_size_t offset, int sz);

/*
 *	u_intN_t bus_space_read_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset);
 *
 * Read a 1, 2, 4, or 8 byte quantity from bus space
 * described by tag/handle/offset.
 */

#define	bus_space_read_1(t, h, o)					\
    (((t)->bsr1 != NULL) ? ((t)->bsr1)(t, h, o) :			\
    (*(volatile uint8_t *)((h) + (o))))

#define	bus_space_read_2(t, h, o)					\
    (((t)->bsr2 != NULL) ? ((t)->bsr2)(t, h, o) :			\
    (*(volatile uint16_t *)((h) + (o))))

#define	bus_space_read_4(t, h, o)					\
    (((t)->bsr4 != NULL) ? ((t)->bsr4)(t, h, o) :			\
    (*(volatile uint32_t *)((h) + (o))))

#if 0	/* Cause a link error for bus_space_read_8 */
#define	bus_space_read_8(t, h, o)	!!! bus_space_read_8 unimplemented !!!
#endif

/*
 *	void bus_space_read_multi_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    u_intN_t *addr, size_t count);
 *
 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
 * described by tag/handle/offset and copy into buffer provided.
 */

#define	bus_space_read_multi_1(t, h, o, a, c)				\
do {									\
	if ((t)->bsrm1 != NULL)						\
		((t)->bsrm1)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%a0@,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_read_multi_2(t, h, o, a, c)				\
do {									\
	if ((t)->bsrm2 != NULL)						\
		((t)->bsrm2)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%a0@,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_read_multi_4(t, h, o, a, c) do {			\
	if ((t)->bsrm4 != NULL)						\
		((t)->bsrm4)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%a0@,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_read_multi_8 */
#define	bus_space_read_multi_8	!!! bus_space_read_multi_8 unimplemented !!!
#endif

/*
 *	void bus_space_read_region_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    u_intN_t *addr, 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.
 */

#define	bus_space_read_region_1(t, h, o, a, c)				\
do {									\
	if ((t)->bsrr1 != NULL)						\
		((t)->bsrr1)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%a0@+,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_read_region_2(t, h, o, a, c)				\
do {									\
	if ((t)->bsrr2 != NULL)						\
		((t)->bsrr2)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%a0@+,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_read_region_4(t, h, o, a, c)				\
do {									\
	if ((t)->bsrr4 != NULL)						\
		((t)->bsrr4)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%a0@+,%%a1@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_read_region_8 */
#define	bus_space_read_region_8	!!! bus_space_read_region_8 unimplemented !!!
#endif

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

#define	bus_space_write_1(t, h, o, v)					\
do {									\
	if ((t)->bsw1 != NULL)						\
		((t)->bsw1)(t, h, o, v);				\
	else								\
		((void)(*(volatile uint8_t *)((h) + (o)) = (v)));	\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_2(t, h, o, v)					\
do {									\
	if ((t)->bsw2 != NULL)						\
		((t)->bsw2)(t, h, o, v);				\
	else								\
		((void)(*(volatile uint16_t *)((h) + (o)) = (v)));	\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_4(t, h, o, v)					\
do {									\
	if ((t)->bsw4 != NULL)						\
		((t)->bsw4)(t, h, o, v);				\
	else								\
		((void)(*(volatile uint32_t *)((h) + (o)) = (v)));	\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_write_8 */
#define	bus_space_write_8	!!! bus_space_write_8 not implemented !!!
#endif

/*
 *	void bus_space_write_multi_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    const u_intN_t *addr, size_t count);
 *
 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
 * provided to bus space described by tag/handle/offset.
 */

#define	bus_space_write_multi_1(t, h, o, a, c)				\
do {									\
	if ((t)->bswm1 != NULL)						\
		((t)->bswm1)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%a1@+,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_multi_2(t, h, o, a, c)				\
do {									\
	if ((t)->bswm2 != NULL)						\
		((t)->bswm2)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%a1@+,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_multi_4(t, h, o, a, c)				\
do {									\
	(void) t;							\
	if ((t)->bswm4 != NULL)					\
		((t)->bswm4)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%a1@+,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_write_8 */
#define	bus_space_write_multi_8(t, h, o, a, c)				\
			!!! bus_space_write_multi_8 unimplimented !!!
#endif

/*
 *	void bus_space_write_region_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    const u_intN_t *addr, size_t count);
 *
 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
 * to bus space described by tag/handle starting at `offset'.
 */

#define	bus_space_write_region_1(t, h, o, a, c)				\
do {									\
	if ((t)->bswr1 != NULL)					\
		((t)->bswr1)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%a1@+,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_region_2(t, h, o, a, c)				\
do {									\
	if ((t)->bswr2) != NULL)					\
		((t)->bswr2)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%a1@+,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_write_region_4(t, h, o, a, c)				\
do {									\
	if ((t)->bswr4) != NULL)					\
		((t)->bswr4)(t, h, o, a, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%a1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%a1@+,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (a), "g" (c)	:	\
			    "%a0","%a1","%d0");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_write_region_8 */
#define	bus_space_write_region_8					\
			!!! bus_space_write_region_8 unimplemented !!!
#endif

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

#define	bus_space_set_multi_1(t, h, o, val, c)				\
do {									\
	if ((t)->bssm1 != NULL)						\
		((t)->bssm1)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%d1,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_set_multi_2(t, h, o, val, c)				\
do {									\
	if ((t)->bssm2 != NULL)						\
		((t)->bssm2)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%d1,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_set_multi_4(t, h, o, val, c)				\
do {									\
	if ((t)->bssm4 != NULL)						\
		((t)->bssm4)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%d1,%%a0@			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_set_multi_8 */
#define	bus_space_set_multi_8						\
			!!! bus_space_set_multi_8 unimplemented !!!
#endif

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

#define	bus_space_set_region_1(t, h, o, val, c)				\
do {									\
	if ((t)->bssr1 != NULL)						\
		((t)->bssr1)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movb	%%d1,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_set_region_2(t, h, o, val, c)				\
do {									\
	if ((t)->bssr2 != NULL)						\
		((t)->bssr2)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movw	%%d1,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#define	bus_space_set_region_4(t, h, o, val, c)				\
do {									\
	(void) t;							\
	if ((t)->bssr4 != NULL)						\
		((t)->bssr4)(t, h, o, val, c);				\
	else {								\
		__asm volatile ("					\
			movl	%0,%%a0				;	\
			movl	%1,%%d1				;	\
			movl	%2,%%d0				;	\
		1:	movl	%%d1,%%a0@+			;	\
			subql	#1,%%d0				;	\
			jne	1b"				:	\
								:	\
			    "r" ((h) + (o)), "g" (val), "g" (c)	:	\
			    "%a0","%d0","%d1");				\
	}								\
} while (/* CONSTCOND */ 0)

#if 0	/* Cause a link error for bus_space_set_region_8 */
#define	bus_space_set_region_8						\
			!!! bus_space_set_region_8 unimplemented !!!
#endif

/*
 *	void bus_space_copy_region_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh1, bus_size_t off1,
 *	    bus_space_handle_t bsh2, bus_size_t off2,
 *	    bus_size_t count);
 *
 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
 */

#define	__HP300_copy_region_N(BYTES)					\
static __inline void						\
__CONCAT(bus_space_copy_region_,BYTES)(bus_space_tag_t t,		\
    bus_space_handle_t h1, bus_size_t o1, bus_space_handle_t h2,	\
    bus_size_t o2, bus_size_t c)					\
{									\
	bus_size_t o;							\
									\
	if ((h1 + o1) >= (h2 + o2)) {					\
		/* src after dest: copy forward */			\
		for (o = 0; c != 0; c--, o += BYTES)			\
			__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o,	\
			    __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
	} else {							\
		/* dest after src: copy backwards */			\
		for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES)	\
			__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o,	\
			    __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
	}								\
}
__HP300_copy_region_N(1)
__HP300_copy_region_N(2)
__HP300_copy_region_N(4)
#if 0	/* Cause a link error for bus_space_copy_region_8 */
#define	bus_space_copy_region_8						\
			!!! bus_space_copy_region_8 unimplemented !!!
#endif

#undef __HP300_copy_region_N

/*
 * Bus read/write barrier methods.
 *
 *	void bus_space_barrier(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    bus_size_t len, int flags);
 *
 * Note: the 680x0 does not currently require barriers, but we must
 * provide the flags to MI code.
 */
#define	bus_space_barrier(t, h, o, l, f)	\
	((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
#define	BUS_SPACE_BARRIER_READ	0x01		/* force read barrier */
#define	BUS_SPACE_BARRIER_WRITE	0x02		/* force write barrier */

#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)

#endif /* _HP300_BUS_H_ */