/*	$NetBSD: pmap.h,v 1.1.1.1 1997/01/14 20:57:06 gwr Exp $	*/

/*-
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jeremy Cooper.
 *
 * 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.
 */

#ifndef	_SUN3X_PMAP_H
#define	_SUN3X_PMAP_H

/*
 * Physical map structures exported to the VM code.
 */

struct pmap {
	int	                pm_refcount;	/* pmap reference count */
	simple_lock_data_t      pm_lock;	/* lock on pmap */
	struct pmap_statistics	pm_stats;	/* pmap statistics */
	struct a_tmgr_struct    *pm_a_tbl;      /* Root level MMU table to use  */
};

typedef struct pmap *pmap_t;

#ifdef _KERNEL
extern	struct pmap	kernel_pmap;
struct pcb;
void   pmap_activate __P((pmap_t pmap, struct pcb *pcbp));
void   pmap_deactivate __P((pmap_t pmap, struct pcb *pcbp));

#define	pmap_kernel()			(&kernel_pmap)

#define PMAP_ACTIVATE(pmap, pcbp, iscurproc) \
	pmap_activate(pmap, pcbp)
#define PMAP_DEACTIVATE(pmap, pcbp) \
	pmap_deactivate(pmap, pcbp)

#define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
#define	pmap_wired_count(pmap)		((pmap)->pm_stats.wired_count)

#define pmap_phys_address(page) 	(page)

/*
 * Flags to tell pmap_enter `this is not to be cached', etc.
 * Since physical addresses are always aligned, we can use
 * the low order bits for this.
 */
#define	PMAP_VME16	0x10		/* pmap will add the necessary offset */
#define	PMAP_VME32	0x20		/* etc. */
#define	PMAP_NC		0x40		/* tells pmap_enter to set PTE_CI */
#define	PMAP_SPEC	0xFF		/* mask to get all above. */

#endif	/* _KERNEL */
#endif	/* _SUN3X_PMAP_H */