bus.h

国产CPU－龙芯（loongson)BIOS源代码

/*	$OpenBSD: bus.h,v 1.33 2002/03/14 01:26:33 millert Exp $	*/
/*	$NetBSD: bus.h,v 1.6 1996/11/10 03:19:25 thorpej Exp $	*/

/*-
 * Copyright (c) 1996, 1997 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) 1996 Charles M. Hannum.  All rights reserved.
 * Copyright (c) 1996 Jason R. Thorpe.  All rights reserved.
 * Copyright (c) 1996 Christopher G. Demetriou.  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 Christopher G. Demetriou
 *	for the NetBSD Project.
 * 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.
 */

#ifndef _I386_BUS_H_
#define _I386_BUS_H_

#include <machine/pio.h>

/*
 * Values for the i386 bus space tag, not to be used directly by MI code.
 */
#define	I386_BUS_SPACE_IO	0	/* space is i/o space */
#define I386_BUS_SPACE_MEM	1	/* space is mem 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.
 */
/*
 * Access methods for bus resources
 */
#define bus_space_map(t, addr, size, cacheable, bshp) \
						      ((*(bshp) = (t)->bus_base + (addr)), 0)

#define bus_space_unmap(t, bsh, size)

typedef u_int32_t bus_space_handle_t;
typedef struct tgt_bus_space *bus_space_tag_t;

/*
 *  Describe a bus with properties.
 */
struct tgt_bus_space {
	u_int32_t	bus_base;
	u_int8_t	bus_reverse;	/* Reverse bytes */
};

extern struct tgt_bus_space tgt_isa_io, tgt_isa_mem;
#ifndef PMON
int	bus_space_map(bus_space_tag_t t, bus_addr_t addr,
	    bus_size_t size, int cacheable, bus_space_handle_t *bshp);
/* like bus_space_map(), but without extent map checking/allocation */
int	_bus_space_map(bus_space_tag_t t, bus_addr_t addr,
	    bus_size_t size, int cacheable, bus_space_handle_t *bshp);
void	bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
	    bus_size_t size);
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 cacheable, bus_addr_t *addrp,
	    bus_space_handle_t *bshp);
void	bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
	    bus_size_t size);
#endif /* !PMON */
/*
 *	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) == I386_BUS_SPACE_IO ? (inb((h) + (o))) :			\
	    (*(volatile u_int8_t *)((h) + (o))))

#define	bus_space_read_2(t, h, o)					\
	((t) == I386_BUS_SPACE_IO ? (inw((h) + (o))) :			\
	    (*(volatile u_int16_t *)((h) + (o))))

#define	bus_space_read_4(t, h, o)					\
	((t) == I386_BUS_SPACE_IO ? (inl((h) + (o))) :			\
	    (*(volatile u_int32_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, cnt) do {			\
	if ((t) == I386_BUS_SPACE_IO) {					\
		insb((h) + (o), (a), (cnt));				\
	} else {void *_addr=(a); int _cnt=(cnt);			\
		__asm __volatile("					\
			cld					;	\
		1:	movb (%2),%%al				;	\
			stosb					;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt) : "r" ((h) + (o))	:	\
		    "%eax", "memory", "cc");				\
	}								\
} while (0)

#define	bus_space_read_multi_2(t, h, o, a, cnt) do {			\
	if ((t) == I386_BUS_SPACE_IO) {					\
		insw((h) + (o), (a), (cnt));				\
	} else {void *_addr=(a); int _cnt=(cnt);			\
		__asm __volatile("					\
			cld					;	\
		1:	movw (%2),%%ax				;	\
			stosw					;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt) : "r" ((h) + (o))	:	\
		    "%eax", "memory", "cc");				\
	}								\
} while (0)

#define	bus_space_read_multi_4(t, h, o, a, cnt) do {			\
	if ((t) == I386_BUS_SPACE_IO) {					\
		insl((h) + (o), (a), (cnt));				\
	} else {void *_addr=(a); int _cnt=(cnt);			\
		__asm __volatile("					\
			cld					;	\
		1:	movl (%2),%%eax				;	\
			stosl					;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt) : "r" ((h) + (o))	:	\
		    "%eax", "memory", "cc");				\
	}								\
} while (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_raw_multi_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    u_int8_t *addr, size_t count);
 *
 * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
 * described by tag/handle/offset and copy into buffer provided.  The buffer
 * must have proper alignment for the N byte wide entities.  Furthermore
 * possible byte-swapping should be done by these functions.
 */

#define	bus_space_read_raw_multi_2(t, h, o, a, c) \
    bus_space_read_multi_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1)
#define	bus_space_read_raw_multi_4(t, h, o, a, c) \
    bus_space_read_multi_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2)

#if 0	/* Cause a link error for bus_space_read_raw_multi_8 */
#define	bus_space_read_raw_multi_8 \
    !!! bus_space_read_raw_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, cnt) do {			\
	int _cnt = (cnt);	void *_addr = (a); int _port = (h)+(o);	\
	if ((t) == I386_BUS_SPACE_IO) {					\
		__asm __volatile("					\
			cld					;	\
		1:	inb %w2,%%al				;	\
			stosb					;	\
			incl %2					;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt), "+d" (_port)	::	\
		    "%eax", "memory", "cc");				\
	} else								\
		i386_space_copy(_port, _addr, 1, _cnt);			\
} while (0)

#define	bus_space_read_region_2(t, h, o, a, cnt) do {			\
	int _cnt = (cnt);	void *_addr = (a); int _port = (h)+(o);	\
	if ((t) == I386_BUS_SPACE_IO) {					\
		__asm __volatile("					\
			cld					;	\
		1:	inw %w2,%%ax				;	\
			stosw					;	\
			addl $2,%2				;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt), "+d" (_port)	::	\
		    "%eax", "memory", "cc");				\
	} else								\
		i386_space_copy(_port, _addr, 2, _cnt);			\
} while (0)

#define	bus_space_read_region_4(t, h, o, a, cnt) do {			\
	int _cnt = (cnt);	void *_addr = (a); int _port = (h)+(o);	\
	if ((t) == I386_BUS_SPACE_IO) {					\
		__asm __volatile("					\
			cld					;	\
		1:	inl %w2,%%eax				;	\
			stosl					;	\
			addl $4,%2				;	\
			loop 1b"				:	\
		    "+D" (_addr), "+c" (_cnt), "+d" (_port)	::	\
		    "%eax", "memory", "cc");				\
	} else								\
		i386_space_copy(_port, _addr, 4, _cnt);			\
} while (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_read_raw_region_N(bus_space_tag_t tag,
 *	    bus_space_handle_t bsh, bus_size_t offset,
 *	    u_int8_t *addr, size_t count);
 *
 * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
 * described by tag/handle and starting at `offset' and copy into
 * buffer provided.  The buffer must have proper alignment for the N byte
 * wide entities.  Furthermore possible byte-swapping should be done by
 * these functions.
 */

#define	bus_space_read_raw_region_2(t, h, o, a, c) \
    bus_space_read_region_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1)
#define	bus_space_read_raw_region_4(t, h, o, a, c) \
    bus_space_read_region_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2)

#if 0	/* Cause a link error for bus_space_read_raw_region_8 */
#define	bus_space_read_raw_region_8 \
    !!! bus_space_read_raw_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