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/* $NetBSD: pmap.h,v 1.13 1995/04/10 12:42:29 mycroft Exp $ */
/*
* Copyright (c) 1994 Gordon W. Ross
* Copyright (c) 1993 Adam Glass
* 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 Adam Glass.
* 4. The name of the Authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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
struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
#define PMAP_ACTIVATE(pmap, pcbp, iscurproc) \
pmap_activate(pmap, pcbp)
#define PMAP_DEACTIVATE(pmap, pcbp) \
pmap_deactivate(pmap, pcbp)
/* XXX - Need a (silly) #define 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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