NetBSD/sys/arch/mac68k/include/pte.h

150 lines
6.2 KiB
C

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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.
*/
/*-
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
* Michael L. Finch, Bradley A. Grantham, and
* Lawrence A. Kesteloot
* 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 by the Alice Group.
* 4. The names of the Alice Group or any of its members may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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.
*
*/
/*
* from: Utah $Hdr: pte.h 1.11 89/09/03$
*
* from: @(#)pte.h 7.3 (Berkeley) 5/8/91
* $Id: pte.h,v 1.3 1994/02/22 00:59:34 briggs Exp $
*/
/*
* Mac hardware segment/page table entries
*/
struct ste {
unsigned int sg_pfnum:20; /* page table frame number */
unsigned int :8; /* reserved at 0 */
unsigned int :1; /* reserved at 1 */
unsigned int sg_prot:1; /* write protect bit */
unsigned int sg_v:2; /* valid bits */
};
struct pte {
unsigned int pg_pfnum:20; /* page frame number or 0 */
unsigned int :3;
unsigned int pg_w:1; /* is wired */
unsigned int :1; /* reserved at zero */
unsigned int pg_ci:1; /* cache inhibit bit */
unsigned int :1; /* reserved at zero */
unsigned int pg_m:1; /* hardware modified (dirty) bit */
unsigned int pg_u:1; /* hardware used (reference) bit */
unsigned int pg_prot:1; /* write protect bit */
unsigned int pg_v:2; /* valid bit */
};
typedef struct ste st_entry_t; /* segment table entry */
typedef struct pte pt_entry_t; /* Mach page table entry */
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define ST_ENTRY_NULL ((st_entry_t *) 0)
#define SG_V 0x00000002 /* segment is valid */
#define SG_NV 0x00000000
#define SG_PROT 0x00000004 /* access protection mask */
#define SG_RO 0x00000004
#define SG_RW 0x00000000
#define SG_FRAME 0xfffff000
#define SG_IMASK 0xffc00000
#define SG_PMASK 0x003ff000
#define SG_ISHIFT 22
#define SG_PSHIFT 12
#define PG_V 0x00000001
#define PG_NV 0x00000000
#define PG_PROT 0x00000004
#define PG_U 0x00000008
#define PG_M 0x00000010
#define PG_W 0x00000100
#define PG_RO 0x00000004
#define PG_RW 0x00000000
#define PG_FRAME 0xfffff000
#define PG_CI 0x00000040
#define PG_SHIFT 12
#define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT)
#define MAC_STSIZE MAC_PAGE_SIZE /* segment table size */
#define MAC_MAX_PTSIZE MAC_SEG_SIZE /* max size of UPT */
#define MAC_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */
#define MAC_PTBASE 0x60100000 /* UPT map base address */
#define MAC_PTMAXSIZE 0x70000000 /* UPT map maximum size */
/*
* Kernel virtual address to page table entry and to physical address.
*/
#define kvtopte(va) \
(&Sysmap[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT])
#define kvtoste(va) \
(&Sysseg[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> SEGSHIFT])
#define ptetokv(pt) \
((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
#define kvtophys(va) \
((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET))