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pte.h revision 1.1 
      1 /*	$NetBSD: pte.h,v 1.1 1999/09/13 10:31:21 itojun Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      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 University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)pte.h	5.5 (Berkeley) 5/9/91
     39  */
     40 
     41 /*
     42  * SH3
     43  *
     44  * Page Table Entry
     45  *
     46  *  T.Horiuchi Brains Corp. 05/26/1998
     47  */
     48 #ifndef _SH3_PTE_H_
     49 #define _SH3_PTE_H_
     50 
     51 #define	PDSHIFT		22		/* LOG2(NBPDR) */
     52 #define	NBPD		(1 << PDSHIFT)	/* bytes/page dir */
     53 #define	PDOFSET		(NBPD-1)	/* byte offset into page dir */
     54 #define	NPTEPD		(NBPD / NBPG)
     55 
     56 #ifndef _LOCORE
     57 typedef int	pd_entry_t;		/* page directory entry */
     58 typedef int	pt_entry_t;		/* Mach page table entry */
     59 #endif
     60 
     61 #define	PD_MASK		0xffc00000	/* page directory address bits */
     62 #define	PT_MASK		0x003ff000	/* page table address bits */
     63 #define	PTES_PER_PTP	(NBPD / NBPG)	/* # of PTEs in a PTP */
     64 
     65 #define	PG_AVAIL2	0x00000200	/* ignored by hardware */
     66 #define	PG_V		0x00000100	/* present */
     67 #define	PG_AVAIL1	0x00000080	/* ignored by hardware */
     68 #define	PG_RO		0x00000000	/* read-only by user */
     69 #define	PG_RW		0x00000020	/* read-write by user */
     70 #define	PG_u		0x00000040	/* accessible by user */
     71 #define	PG_PROT		0x00000060	/* all protection bits */
     72 #define	PG_N		0x00000008	/* 0=non-cacheable */
     73 #define	PG_M		0x00000004	/* has been modified */
     74 #define	PG_FRAME	0xfffff000	/* page frame mask */
     75 
     76 #define	PG_KR		0x00000000
     77 #define	PG_KW		0x00000020
     78 #define	PG_URKR		0x00000040
     79 #define	PG_UW		0x00000060
     80 
     81 #define	PG_W		0x00000400	/* page is wired */
     82 
     83 #define	PG_4K		0x00000010
     84 #define	PG_G		0x00000002	/* share status */
     85 
     86 #ifndef _LOCORE
     87 #ifdef _KERNEL
     88 /* utilities defined in pmap.c */
     89 extern	pt_entry_t *Sysmap;
     90 #endif
     91 #endif
     92 
     93 #endif /* !_SH3_PTE_H_ */
     94