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pmap3x.h revision 1.15 
      1 /*	$NetBSD: pmap3x.h,v 1.15 2001/07/03 14:40:41 chs 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 struct pmap {
     45 	struct a_tmgr_struct	*pm_a_tmgr; 	/* Level-A table manager */
     46 	u_long              	pm_a_phys;  	/* MMU level-A phys addr */
     47 	struct simplelock	pm_lock;    	/* lock on pmap */
     48 	int             	pm_refcount;	/* reference count */
     49 	int             	pm_version;
     50 };
     51 
     52 #ifdef _KERNEL
     53 extern	struct pmap 	kernel_pmap;
     54 #define	pmap_kernel()	(&kernel_pmap)
     55 
     56 /* Common function for pmap_resident_count(), pmap_wired_count() */
     57 segsz_t pmap_count __P((pmap_t, int));
     58 
     59 /* This needs to be a macro for kern_sysctl.c */
     60 #define	pmap_resident_count(pmap)	(pmap_count((pmap), 0))
     61 
     62 /* This needs to be a macro for vm_mmap.c */
     63 #define	pmap_wired_count(pmap)  	(pmap_count((pmap), 1))
     64 
     65 /* We use the PA plus some low bits for device mmap. */
     66 #define pmap_phys_address(addr) 	(addr)
     67 
     68 #define	pmap_update()			/* nothing (yet) */
     69 
     70 /* Map a given physical region to a virtual region */
     71 vaddr_t pmap_map __P((vaddr_t, paddr_t, paddr_t, int));
     72 
     73 /*
     74  * Flags to tell pmap_enter `this is not to be cached', etc.
     75  * Since physical addresses are always aligned, we can use
     76  * the low order bits for this.
     77  */
     78 #define	PMAP_VME16	0x10	/* pmap will add the necessary offset */
     79 #define	PMAP_VME32	0x20	/* etc. */
     80 #define	PMAP_NC		0x40	/* tells pmap_enter to set PTE_CI */
     81 #define	PMAP_SPEC	0xFF	/* mask to get all above. */
     82 
     83 #endif	/* _KERNEL */
     84