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pmap.h revision 1.13 
      1 /*	$NetBSD: pmap.h,v 1.13 1995/04/10 12:42:29 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Gordon W. Ross
      5  * Copyright (c) 1993 Adam Glass
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by Adam Glass.
     19  * 4. The name of the Authors may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef	_MACHINE_PMAP_
     35 #define	_MACHINE_PMAP_
     36 
     37 /*
     38  * Physical map structures exported to the VM code.
     39  */
     40 
     41 struct pmap {
     42 	int	                pm_refcount;	/* pmap reference count */
     43 	simple_lock_data_t      pm_lock;	/* lock on pmap */
     44 	struct pmap_statistics	pm_stats;	/* pmap statistics */
     45 	int                     pm_version;
     46 	int                     pm_ctxnum;
     47 	unsigned char           *pm_segmap;
     48 };
     49 
     50 typedef struct pmap *pmap_t;
     51 
     52 #ifdef _KERNEL
     53 struct pmap	kernel_pmap_store;
     54 
     55 #define	pmap_kernel()			(&kernel_pmap_store)
     56 
     57 #define PMAP_ACTIVATE(pmap, pcbp, iscurproc) \
     58 	pmap_activate(pmap, pcbp)
     59 #define PMAP_DEACTIVATE(pmap, pcbp) \
     60 	pmap_deactivate(pmap, pcbp)
     61 
     62 /* XXX - Need a (silly) #define get code in kern_sysctl.c */
     63 extern segsz_t pmap_resident_pages(pmap_t);
     64 #define	pmap_resident_count(pmap)	pmap_resident_pages(pmap)
     65 
     66 /*
     67  * Since PTEs also contain type bits, we have to have some way
     68  * to tell pmap_enter `this is an IO page' or `this is not to
     69  * be cached'.  Since physical addresses are always aligned, we
     70  * can do this with the low order bits.
     71  *
     72  * The values below must agree with pte.h such that:
     73  *	(PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO
     74  */
     75 #define	PMAP_OBIO	0x04		/* tells pmap_enter to use PG_OBIO */
     76 #define	PMAP_VME16	0x08		/* etc */
     77 #define	PMAP_VME32	0x0C		/* etc */
     78 #define	PMAP_NC		0x10		/* tells pmap_enter to set PG_NC */
     79 #define	PMAP_SPEC	0x1C		/* mask to get all above. */
     80 
     81 #endif	/* _KERNEL */
     82 #endif	/* _MACHINE_PMAP_ */
     83