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/* $OpenBSD: pmap.h,v 1.9 2001/08/18 20:50:18 art Exp $ */
/* $NetBSD: pmap.h,v 1.18 1997/01/27 19:41:06 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass and Gordon W. Ross.
*
* 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 _MACHINE_PMAP_
#define _MACHINE_PMAP_
/*
* 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 */
int pm_version;
int pm_ctxnum;
unsigned char *pm_segmap;
};
typedef struct pmap *pmap_t;
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
/* This is called from locore.s:cpu_switch() */
void pmap_switch __P((pmap_t pmap));
/* This lets us have some say in choosing VA locations. */
extern void pmap_prefer(vm_offset_t, vm_offset_t *);
#define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap))
/* This needs to be a macro to get code in kern_sysctl.c */
extern segsz_t pmap_resident_pages(pmap_t);
#define pmap_resident_count(pmap) pmap_resident_pages(pmap)
/*
* Since PTEs also contain type bits, we have to have some way
* to tell pmap_enter `this is an IO page' or `this is not to
* be cached'. Since physical addresses are always aligned, we
* can do this with the low order bits.
*
* The values below must agree with pte.h such that:
* (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO
*/
#define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */
#define PMAP_VME16 0x08 /* etc */
#define PMAP_VME32 0x0C /* etc */
#define PMAP_NC 0x10 /* tells pmap_enter to set PG_NC */
#define PMAP_SPEC 0x1C /* mask to get all above. */
#endif /* _KERNEL */
#endif /* _MACHINE_PMAP_ */
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