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pmap3x.h revision 1.3 
      1 /*	$NetBSD: pmap3x.h,v 1.3 1997/02/12 23:01:28 gwr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jeremy Cooper.
      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 FOUNDATION OR CONTRIBUTORS
     30  * BE 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	_SUN3X_PMAP_H
     40 #define	_SUN3X_PMAP_H
     41 
     42 /*
     43  * Physical map structures exported to the VM code.
     44  */
     45 
     46 struct pmap {
     47 	struct a_tmgr_struct	*pm_a_tmgr; 	/* Level-A table manager */
     48 	u_long              	pm_a_phys;  	/* MMU level-A phys addr */
     49 	int                 	pm_refcount;	/* reference count */
     50 	simple_lock_data_t  	pm_lock;    	/* lock on pmap */
     51 	struct pmap_statistics	pm_stats;   	/* statistics */
     52 };
     53 
     54 typedef struct pmap 	*pmap_t;
     55 
     56 #ifdef _KERNEL
     57 extern	struct pmap 	kernel_pmap;
     58 #define	pmap_kernel()	(&kernel_pmap)
     59 
     60 /* This is called from locore.s:cpu_switch() */
     61 void	pmap_activate __P((pmap_t pmap));
     62 
     63 #define _pmap_fault(map, va, ftype) \
     64 	vm_fault(map, va, ftype, 0)
     65 
     66 /* This needs to be a macro for kern_sysctl.c */
     67 extern segsz_t pmap_resident_pages(pmap_t);
     68 #define	pmap_resident_count(pmap)	(pmap_resident_pages(pmap))
     69 
     70 /* This needs to be a macro for vm_mmap.c */
     71 extern segsz_t pmap_wired_pages(pmap_t);
     72 #define	pmap_wired_count(pmap)	(pmap_wired_pages(pmap))
     73 
     74 /* We use the PA plus some low bits for device mmap. */
     75 #define pmap_phys_address(addr) 	(addr)
     76 
     77 /*
     78  * Flags to tell pmap_enter `this is not to be cached', etc.
     79  * Since physical addresses are always aligned, we can use
     80  * the low order bits for this.
     81  */
     82 #define	PMAP_VME16	0x10	/* pmap will add the necessary offset */
     83 #define	PMAP_VME32	0x20	/* etc. */
     84 #define	PMAP_NC		0x40	/* tells pmap_enter to set PTE_CI */
     85 #define	PMAP_SPEC	0xFF	/* mask to get all above. */
     86 
     87 #endif	/* _KERNEL */
     88 #endif	/* _SUN3X_PMAP_H */
     89