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pmap.h revision 1.15 
      1 /*	$NetBSD: pmap.h,v 1.15 1996/11/20 18:57:16 gwr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Adam Glass and Gordon W. Ross.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
     30  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef	_MACHINE_PMAP_
     40 #define	_MACHINE_PMAP_
     41 
     42 /*
     43  * Physical map structures exported to the VM code.
     44  */
     45 
     46 struct pmap {
     47 	int	                pm_refcount;	/* pmap reference count */
     48 	simple_lock_data_t      pm_lock;	/* lock on pmap */
     49 	struct pmap_statistics	pm_stats;	/* pmap statistics */
     50 	int                     pm_version;
     51 	int                     pm_ctxnum;
     52 	unsigned char           *pm_segmap;
     53 };
     54 
     55 typedef struct pmap *pmap_t;
     56 
     57 #ifdef _KERNEL
     58 struct pmap	kernel_pmap_store;
     59 
     60 #define	pmap_kernel()			(&kernel_pmap_store)
     61 
     62 #define PMAP_ACTIVATE(pmap, pcbp, iscurproc) \
     63 	pmap_activate(pmap, pcbp)
     64 #define PMAP_DEACTIVATE(pmap, pcbp) \
     65 	pmap_deactivate(pmap, pcbp)
     66 
     67 extern void pmap_prefer(vm_offset_t, vm_offset_t *);
     68 #define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap))
     69 
     70 /* XXX - Need a (silly) #define get code in kern_sysctl.c */
     71 extern segsz_t pmap_resident_pages(pmap_t);
     72 #define	pmap_resident_count(pmap)	pmap_resident_pages(pmap)
     73 
     74 /*
     75  * Since PTEs also contain type bits, we have to have some way
     76  * to tell pmap_enter `this is an IO page' or `this is not to
     77  * be cached'.  Since physical addresses are always aligned, we
     78  * can do this with the low order bits.
     79  *
     80  * The values below must agree with pte.h such that:
     81  *	(PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO
     82  */
     83 #define	PMAP_OBIO	0x04		/* tells pmap_enter to use PG_OBIO */
     84 #define	PMAP_VME16	0x08		/* etc */
     85 #define	PMAP_VME32	0x0C		/* etc */
     86 #define	PMAP_NC		0x10		/* tells pmap_enter to set PG_NC */
     87 #define	PMAP_SPEC	0x1C		/* mask to get all above. */
     88 
     89 #endif	/* _KERNEL */
     90 #endif	/* _MACHINE_PMAP_ */
     91