NetBSD/sys/arch/sun3/include/pte3x.h

103 lines
3.8 KiB
C

/* $NetBSD: pte3x.h,v 1.3 1997/01/23 22:25:56 gwr Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jeremy Cooper.
*
* 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 FOUNDATION 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.
*/
/*
* This file should contain the machine-dependent details about
* Page Table Entries (PTEs) and related things. For example,
* things that depend on the MMU configuration (number of levels
* in the translation structure) should go here.
*/
#ifndef _MACHINE_PTE_H
#define _MACHINE_PTE_H
#include <machine/mc68851.h>
#define OBMEM 0
#define OBIO 1
#define VME_D16 2
#define VME_D32 3
#define PG_TYPE_SHIFT 26
#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)
/*
* Mach derived conversion macros
*/
#define sun3x_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET)
#define sun3x_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET)
#define sun3x_btos(x) ((unsigned)(x) >> SEGSHIFT)
#define sun3x_stob(x) ((unsigned)(x) << SEGSHIFT)
#define sun3x_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
#define sun3x_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
#define sun3x_btop(x) ((unsigned)(x) >> PGSHIFT)
#define sun3x_ptob(x) ((unsigned)(x) << PGSHIFT)
#define sun3x_round_up_page(x)\
((unsigned long) ((x) + MMU_PAGE_SIZE - 1) & MMU_PAGE_MASK)
#ifdef _KERNEL
/* XXX - Not sure about these. Use pmap_enter_kernel() instead? */
#if 1 /* XXX */
/* defined in pmap.c */
vm_offset_t get_pte __P((vm_offset_t va));
void set_pte __P((vm_offset_t, vm_offset_t));
#endif /* XXX */
#endif /* _KERNEL */
#endif /* !_MACHINE_PTE_H*/