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pmap3x.h revision 1.24 
      1 /*	$NetBSD: pmap3x.h,v 1.24 2008/01/04 22:03:26 ad 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 /*
     40  * Physical map structures exported to the VM code.
     41  * XXX - Does user-level code really see this struct?
     42  */
     43 
     44 #include <sys/simplelock.h>
     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 	struct simplelock	pm_lock;    	/* lock on pmap */
     50 	int             	pm_refcount;	/* reference count */
     51 	int             	pm_version;
     52 };
     53 
     54 #ifdef _KERNEL
     55 extern	struct pmap 	kernel_pmap;
     56 #define	pmap_kernel()	(&kernel_pmap)
     57 
     58 /* Common function for pmap_resident_count(), pmap_wired_count() */
     59 segsz_t pmap_count(pmap_t, int);
     60 
     61 /* This needs to be a macro for kern_sysctl.c */
     62 #define	pmap_resident_count(pmap)	(pmap_count((pmap), 0))
     63 
     64 /* This needs to be a macro for vm_mmap.c */
     65 #define	pmap_wired_count(pmap)  	(pmap_count((pmap), 1))
     66 
     67 /* We use the PA plus some low bits for device mmap. */
     68 #define pmap_phys_address(addr) 	(addr)
     69 
     70 #define	pmap_update(pmap)		/* nothing (yet) */
     71 
     72 /* Map a given physical region to a virtual region */
     73 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
     74 
     75 static __inline void
     76 pmap_remove_all(struct pmap *pmap)
     77 {
     78 	/* Nothing. */
     79 }
     80 
     81 /*
     82  * Flags to tell pmap_enter `this is not to be cached', etc.
     83  * Since physical addresses are always aligned, we can use
     84  * the low order bits for this.
     85  */
     86 #define	PMAP_OBMEM	0x00	/* unused */
     87 #define	PMAP_OBIO	0x00	/* unused */
     88 #define	PMAP_VME16	0x10	/* pmap will add the necessary offset */
     89 #define	PMAP_VME32	0x20	/* etc. */
     90 #define	PMAP_NC		0x40	/* tells pmap_enter to set PTE_CI */
     91 #define	PMAP_SPEC	0xFF	/* mask to get all above. */
     92 
     93 #endif	/* _KERNEL */
     94