96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
/* $NetBSD: pte3x.h,v 1.4 1997/03/13 17:40:34 gwr Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jeremy Cooper.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file should contain the machine-dependent details about
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* Page Table Entries (PTEs) and related things. For example,
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* things that depend on the MMU configuration (number of levels
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* in the translation structure) should go here.
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*/
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#ifndef _MACHINE_PTE_H
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#define _MACHINE_PTE_H
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#include <machine/mc68851.h>
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#define OBMEM 0
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#define OBIO 1
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#define VME_D16 2
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#define VME_D32 3
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#define PG_TYPE_SHIFT 26
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#define MAKE_PGTYPE(x) ((x) << PG_TYPE_SHIFT)
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#define PG_PGNUM(pte) (pte & PG_FRAME)
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#define PG_PA(pte) ((pte & PG_FRAME) <<PGSHIFT)
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#define PGT_MASK MAKE_PGTYPE(3)
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#define PGT_OBMEM MAKE_PGTYPE(OBMEM) /* onboard memory */
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#define PGT_OBIO MAKE_PGTYPE(OBIO) /* onboard I/O */
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#define PGT_VME_D16 MAKE_PGTYPE(VME_D16) /* VMEbus 16-bit data */
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#define PGT_VME_D32 MAKE_PGTYPE(VME_D32) /* VMEbus 32-bit data */
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#define VA_SEGNUM(x) ((u_int)(x) >> SEGSHIFT)
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#define VA_PTE_NUM_SHIFT 13
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#define VA_PTE_NUM_MASK (0xF << VA_PTE_NUM_SHIFT)
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#define VA_PTE_NUM(va) ((va & VA_PTE_NUM_MASK) >> VA_PTE_NUM_SHIFT)
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#define PA_PGNUM(pa) ((unsigned)pa >> PGSHIFT)
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/*
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* Mach derived conversion macros
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*/
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#define _round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET)
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#define _trunc_seg(x) ((unsigned)(x) & ~SEGOFSET)
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#define _btos(x) ((unsigned)(x) >> SEGSHIFT)
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#define _stob(x) ((unsigned)(x) << SEGSHIFT)
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#define _round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
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#define _trunc_page(x) ((unsigned)(x) & ~PGOFSET)
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#define _btop(x) ((unsigned)(x) >> PGSHIFT)
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#define _ptob(x) ((unsigned)(x) << PGSHIFT)
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#ifdef _KERNEL
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/* defined in pmap.c */
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vm_offset_t get_pte __P((vm_offset_t va));
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void set_pte __P((vm_offset_t, vm_offset_t));
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PTE_H*/
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