Home | History | Annotate | Line # | Download | only in include
pmap3x.h revision 1.28 
      1 /*	$NetBSD: pmap3x.h,v 1.28 2009/12/11 18:40:08 tsutsui 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Physical map structures exported to the VM code.
     34  * XXX - Does user-level code really see this struct?
     35  */
     36 
     37 #include <sys/simplelock.h>
     38 
     39 struct pmap {
     40 	struct a_tmgr_struct	*pm_a_tmgr; 	/* Level-A table manager */
     41 	u_long              	pm_a_phys;  	/* MMU level-A phys addr */
     42 	struct simplelock	pm_lock;    	/* lock on pmap */
     43 	int             	pm_refcount;	/* reference count */
     44 	int             	pm_version;
     45 };
     46 
     47 #ifdef _KERNEL
     48 /* Common function for pmap_resident_count(), pmap_wired_count() */
     49 segsz_t pmap_count(pmap_t, int);
     50 
     51 /* This needs to be a macro for kern_sysctl.c */
     52 #define	pmap_resident_count(pmap)	(pmap_count((pmap), 0))
     53 
     54 /* This needs to be a macro for vm_mmap.c */
     55 #define	pmap_wired_count(pmap)  	(pmap_count((pmap), 1))
     56 
     57 /* We use the PA plus some low bits for device mmap. */
     58 #define pmap_phys_address(addr) 	(addr)
     59 
     60 #define	pmap_update(pmap)		/* nothing (yet) */
     61 
     62 /* Map a given physical region to a virtual region */
     63 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
     64 
     65 static __inline void
     66 pmap_remove_all(struct pmap *pmap)
     67 {
     68 	/* Nothing. */
     69 }
     70 
     71 /*
     72  * Flags to tell pmap_enter `this is not to be cached', etc.
     73  * Since physical addresses are always aligned, we can use
     74  * the low order bits for this.
     75  */
     76 #define	PMAP_OBMEM	0x00	/* unused */
     77 #define	PMAP_OBIO	0x00	/* unused */
     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 
     85 /* MMU specific segment size */
     86 #define	SEGSHIFT	19	        /* LOG2(NBSG) */
     87 #define	NBSG		(1 << SEGSHIFT)	/* bytes/segment */
     88 #define	SEGOFSET	(NBSG - 1)	/* byte offset into segment */
     89 
     90 #define	sun3x_round_seg(x)	((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET)
     91 #define	sun3x_trunc_seg(x)	((vaddr_t)(x) & ~SEGOFSET)
     92 #define	sun3x_seg_offset(x)	((vaddr_t)(x) & SEGOFSET)
     93