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/* $NetBSD: pte.h,v 1.6 1995/11/12 14:40:26 ragge Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed at Ludd, University of Lule}.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "machine/param.h"
#ifndef ASSEMBLER
/*
* VAX page table entries
*/
struct pte {
unsigned int pg_pfn:21; /* Page Frame Number or 0 */
unsigned int pg_u:1; /* Uniform bit, does WHAT?? XXX */
unsigned int pg_w:1; /* Wired bit */
unsigned int pg_sref:1; /* Help for ref simulation */
unsigned int pg_ref:1; /* Simulated reference bit */
unsigned int pg_z:1; /* Zero DIGITAL = 0 */
unsigned int pg_m:1; /* Modify DIGITAL */
unsigned int pg_prot:4; /* reserved at zero */
unsigned int pg_v:1; /* valid bit */
};
typedef struct pte pt_entry_t; /* Mach page table entry */
#endif ASSEMBLER
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define PG_V 0x80000000
#define PG_NV 0x00000000
#define PG_PROT 0x78000000
#define PG_RW 0x20000000
#define PG_KW 0x10000000
#define PG_KR 0x18000000
#define PG_URKW 0x70000000
#define PG_RO 0x78000000
#define PG_NONE 0x00000000
#define PG_M 0x04000000
#define PG_REF 0x01000000
#define PG_SREF 0x00800000
#define PG_W 0x00400000
#define PG_U 0x00200000
#define PG_FRAME 0x001fffff
#define PG_PFNUM(x) ((x) >> PGSHIFT)
#ifndef ASSEMBLER
extern pt_entry_t *Sysmap;
/*
* Kernel virtual address to page table entry and to physical address.
*/
#endif
#define kvtopte(va) \
(&Sysmap[((unsigned)(va) & ~KERNBASE) >> PGSHIFT])
#define ptetokv(pt) \
((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + 0x80000000)
#define kvtophys(va) \
(((kvtopte(va))->pg_pfn << PGSHIFT) | ((int)(va) & PGOFSET))
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