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/* $OpenBSD: pte.h,v 1.4 1997/09/21 04:21:18 niklas Exp $ */
/* $NetBSD: pte.h,v 1.11 1996/11/20 18:57:18 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass and Gordon W. Ross.
*
* 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 by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 REGENTS OR CONTRIBUTORS 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.
*/
#ifndef _MACHINE_PTE_H
#define _MACHINE_PTE_H
#define NCONTEXT 8
#define SEGINV 255
#define NPAGSEG 16
#define NSEGMAP 2048
#define PG_VALID 0x80000000
#define PG_WRITE 0x40000000
#define PG_SYSTEM 0x20000000
#define PG_NC 0x10000000
#define PG_TYPE 0x0C000000
#define PG_REF 0x02000000
#define PG_MOD 0x01000000
#define PG_SPECIAL (PG_VALID|PG_WRITE|PG_SYSTEM|PG_NC|PG_REF|PG_MOD)
#define PG_PERM (PG_VALID|PG_WRITE|PG_SYSTEM|PG_NC)
#define PG_MODREF (PG_REF|PG_MOD)
#define PG_FRAME 0x0007FFFF
#define PG_MOD_SHIFT 24
#define PG_PERM_SHIFT 28
#define OBMEM 0
#define OBIO 1
#define VME_D16 2
#define VME_D32 3
#define PG_TYPE_SHIFT 26
#define PG_INVAL 0x0
#define MAKE_PGTYPE(x) ((x) << PG_TYPE_SHIFT)
#define PG_PGNUM(pte) (pte & PG_FRAME)
#define PG_PA(pte) ((pte & PG_FRAME) <<PGSHIFT)
#define PGT_MASK MAKE_PGTYPE(3)
#define PGT_OBMEM MAKE_PGTYPE(OBMEM) /* onboard memory */
#define PGT_OBIO MAKE_PGTYPE(OBIO) /* onboard I/O */
#define PGT_VME_D16 MAKE_PGTYPE(VME_D16) /* VMEbus 16-bit data */
#define PGT_VME_D32 MAKE_PGTYPE(VME_D32) /* VMEbus 32-bit data */
#define VA_SEGNUM(x) ((u_int)(x) >> SEGSHIFT)
#define VA_PTE_NUM_SHIFT 13
#define VA_PTE_NUM_MASK (0xF << VA_PTE_NUM_SHIFT)
#define VA_PTE_NUM(va) ((va & VA_PTE_NUM_MASK) >> VA_PTE_NUM_SHIFT)
#define PA_PGNUM(pa) ((unsigned)pa >> PGSHIFT)
#endif /* !_MACHINE_PTE_H*/
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