/*	$NetBSD: isa_machdep.h,v 1.2 1997/11/27 10:19:32 sakamoto Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 *	@(#)isa.h	5.7 (Berkeley) 5/9/91
 */

/*
 * Various pieces of the bebox port want to include this file without
 * or in spite of using isavar.h, and should be fixed.
 */

#ifndef _BEBOX_ISA_MACHDEP_H_			/* XXX */
#define _BEBOX_ISA_MACHDEP_H_			/* XXX */

/*
 * XXX THIS FILE IS A MESS.  copyright: berkeley's probably.
 * contents from isavar.h and isareg.h, mostly the latter.
 * perhaps charles's?
 *
 * copyright from berkeley's isa.h which is now dev/isa/isareg.h.
 */

/*
 * Types provided to machine-independent ISA code.
 */
typedef void *isa_chipset_tag_t;

struct device;			/* XXX */
struct isabus_attach_args;	/* XXX */

/*
 * Functions provided to machine-independent ISA code.
 */
void	isa_attach_hook __P((struct device *, struct device *,
	    struct isabus_attach_args *));
void	*isa_intr_establish __P((isa_chipset_tag_t ic, int irq, int type,
	    int level, int (*ih_fun)(void *), void *ih_arg));
void	isa_intr_disestablish __P((isa_chipset_tag_t ic, void *handler));

/*
 * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
 * BY PORTABLE CODE.
 */

#define	isa_outb(x,y)	outb(bebox_bus_io.bus_base + (x), y)
#define isa_inb(x)	inb(bebox_bus_io.bus_base + (x))

extern struct bebox_bus_dma_tag isa_bus_dma_tag;

/*
 * Cookie used by ISA dma.  A pointer to one of these it stashed in
 * the DMA map.
 */
struct bebox_isa_dma_cookie {
	int	id_flags;		/* flags; see below */

	void	*id_origbuf;		/* pointer to orig buffer if
					   bouncing */
	bus_size_t id_origbuflen;	/* ...and size */

	void	*id_bouncebuf;		/* pointer to the bounce buffer */
	bus_size_t id_bouncebuflen;	/* ...and size */
	int	id_nbouncesegs;		/* number of valid bounce segs */
	bus_dma_segment_t id_bouncesegs[0]; /* array of bounce buffer
					       physical memory segments */
};

/* id_flags */
#define	ID_MIGHT_NEED_BOUNCE	0x01	/* map could need bounce buffers */
#define	ID_HAS_BOUNCE		0x02	/* map currently has bounce buffers */
#define	ID_IS_BOUNCING		0x04	/* map is bouncing current xfer */


/*
 * XXX Various seemingly PC-specific constants, some of which may be
 * unnecessary anyway.
 */

/*
 * stuff that used to be in pccons.c
 */
#define	MONO_BASE	0x3B4
#define	MONO_BUF	0xB0000
#define	CGA_BASE	0x3D4
#define	CGA_BUF		0xB8000
#define	IOPHYSMEM	0xA0000


/*
 * ISA DMA bounce buffers.
 * XXX should be made partially machine- and bus-mapping-independent.
 *
 * DMA_BOUNCE is the number of pages of low-addressed physical memory
 * to acquire for ISA bounce buffers.
 *
 * isaphysmem is the location of those bounce buffers.  (They are currently
 * assumed to be contiguous.
 */

#ifndef DMA_BOUNCE
#define	DMA_BOUNCE      8		/* one buffer per channel */
#endif

extern vm_offset_t isaphysmem;

/*
 * Miscellanous functions.
 */
void sysbeep __P((int, int));		/* beep with the system speaker */

#endif /* _BEBOX_ISA_MACHDEP_H_ XXX */