150 lines
6.2 KiB
C
150 lines
6.2 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
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* Michael L. Finch, Bradley A. Grantham, and
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* Lawrence A. Kesteloot
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* All rights reserved.
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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 Alice Group.
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* 4. The names of the Alice Group or any of its members may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* from: Utah $Hdr: pte.h 1.11 89/09/03$
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*
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* from: @(#)pte.h 7.3 (Berkeley) 5/8/91
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* $Id: pte.h,v 1.3 1994/02/22 00:59:34 briggs Exp $
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*/
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/*
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* Mac hardware segment/page table entries
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*/
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struct ste {
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unsigned int sg_pfnum:20; /* page table frame number */
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unsigned int :8; /* reserved at 0 */
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unsigned int :1; /* reserved at 1 */
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unsigned int sg_prot:1; /* write protect bit */
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unsigned int sg_v:2; /* valid bits */
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};
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struct pte {
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unsigned int pg_pfnum:20; /* page frame number or 0 */
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unsigned int :3;
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unsigned int pg_w:1; /* is wired */
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unsigned int :1; /* reserved at zero */
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unsigned int pg_ci:1; /* cache inhibit bit */
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unsigned int :1; /* reserved at zero */
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unsigned int pg_m:1; /* hardware modified (dirty) bit */
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unsigned int pg_u:1; /* hardware used (reference) bit */
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unsigned int pg_prot:1; /* write protect bit */
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unsigned int pg_v:2; /* valid bit */
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};
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typedef struct ste st_entry_t; /* segment table entry */
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typedef struct pte pt_entry_t; /* Mach page table entry */
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#define PT_ENTRY_NULL ((pt_entry_t *) 0)
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#define ST_ENTRY_NULL ((st_entry_t *) 0)
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#define SG_V 0x00000002 /* segment is valid */
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#define SG_NV 0x00000000
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#define SG_PROT 0x00000004 /* access protection mask */
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#define SG_RO 0x00000004
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#define SG_RW 0x00000000
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#define SG_FRAME 0xfffff000
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#define SG_IMASK 0xffc00000
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#define SG_PMASK 0x003ff000
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#define SG_ISHIFT 22
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#define SG_PSHIFT 12
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#define PG_V 0x00000001
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#define PG_NV 0x00000000
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#define PG_PROT 0x00000004
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#define PG_U 0x00000008
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#define PG_M 0x00000010
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#define PG_W 0x00000100
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#define PG_RO 0x00000004
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#define PG_RW 0x00000000
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#define PG_FRAME 0xfffff000
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#define PG_CI 0x00000040
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#define PG_SHIFT 12
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#define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT)
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#define MAC_STSIZE MAC_PAGE_SIZE /* segment table size */
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#define MAC_MAX_PTSIZE MAC_SEG_SIZE /* max size of UPT */
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#define MAC_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */
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#define MAC_PTBASE 0x60100000 /* UPT map base address */
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#define MAC_PTMAXSIZE 0x70000000 /* UPT map maximum size */
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/*
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* Kernel virtual address to page table entry and to physical address.
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*/
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#define kvtopte(va) \
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(&Sysmap[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT])
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#define kvtoste(va) \
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(&Sysseg[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> SEGSHIFT])
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#define ptetokv(pt) \
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((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
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#define kvtophys(va) \
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((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET))
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