/*	$NetBSD: isa_machdep.h,v 1.4 1995/05/04 19:39:46 cgd 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
 */

/*
 * 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.
 */


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

/*
 * RAM Physical Address Space (ignoring the above mentioned "hole")
 */
#define	RAM_BEGIN	0x0000000	/* Start of RAM Memory */
#define	RAM_END		0x1000000	/* End of RAM Memory */
#define	RAM_SIZE	(RAM_END - RAM_BEGIN)

/*
 * Oddball Physical Memory Addresses
 */
#define	COMPAQ_RAMRELOC	0x80c00000	/* Compaq RAM relocation/diag */
#define	COMPAQ_RAMSETUP	0x80c00002	/* Compaq RAM setup */
#define	WEITEK_FPU	0xC0000000	/* WTL 2167 */
#define	CYRIX_EMC	0xC0000000	/* Cyrix EMC */

/*
 * 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


/*
 * Interrupt handler chains.  isa_intr_establish() inserts a handler into
 * the list.  The handler is called with its (single) argument.
 */

struct intrhand {
	int	(*ih_fun)();
	void	*ih_arg;
	u_long	ih_count;
	struct	intrhand *ih_next;
	int	ih_level;
	int	ih_irq;
};

 
/*
 * 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. If physical memory below 16 MB
 * then DMA_BOUNCE_LOW will be used.
 *
 * isaphysmem is the address of this physical contiguous low memory.
 * isaphysmempgs is the number of pages allocated.
 */

#ifndef DMA_BOUNCE
#define	DMA_BOUNCE      48		/* number of pages if memory > 16M */
#endif

#ifndef DMA_BOUNCE_LOW
#define	DMA_BOUNCE_LOW  16		/* number of pages if memory <= 16M */
#endif

extern vm_offset_t isaphysmem;
extern int isaphysmempgs;


/*
 * Variables and macros to deal with the ISA I/O hole.
 * XXX These should be converted to machine- and bus-mapping-independent
 * function definitions, invoked through the softc.
 */

extern u_long atdevbase;           /* kernel virtual address of "hole" */

/*
 * Given a kernel virtual address for some location
 * in the "hole" I/O space, return a physical address.
 */
#define ISA_PHYSADDR(v) ((void *) ((u_long)(v) - atdevbase + IOM_BEGIN))

/*
 * Given a physical address in the "hole",
 * return a kernel virtual address.
 */
#define ISA_HOLE_VADDR(p)  ((void *) ((u_long)(p) - IOM_BEGIN + atdevbase))


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