103 lines
3.8 KiB
C
103 lines
3.8 KiB
C
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1992 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 and Ralph Campbell.
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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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* from: Utah Hdr: pte.h 1.11 89/09/03
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* from: @(#)pte.h 7.2 (Berkeley) 2/29/92
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* $Id: pte.h,v 1.1.1.1 1993/10/12 03:22:41 deraadt Exp $
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*/
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/*
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* R2000 hardware page table entry
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*/
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#ifndef LOCORE
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struct pte {
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int pg_pfnum:20, /* HW: core page frame number or 0 */
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pg_n:1, /* HW: non-cacheable bit */
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pg_m:1, /* HW: modified (dirty) bit */
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pg_v:1, /* HW: valid bit */
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pg_g:1, /* HW: ignore pid bit */
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:4,
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pg_swapm:1, /* SW: page must be forced to swap */
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pg_fod:1, /* SW: is fill on demand (=0) */
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pg_prot:2; /* SW: access control */
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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int pg_prot:2, /* SW: access control */
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pg_fod:1, /* SW: is fill on demand (=0) */
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pg_swapm:1, /* SW: page must be forced to swap */
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:4,
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pg_g:1, /* HW: ignore pid bit */
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pg_v:1, /* HW: valid bit */
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pg_m:1, /* HW: modified (dirty) bit */
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pg_n:1, /* HW: non-cacheable bit */
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pg_pfnum:20; /* HW: core page frame number or 0 */
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#endif
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};
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typedef union {
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unsigned int pt_entry; /* for copying, etc. */
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struct pte pt_pte; /* for getting to bits by name */
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} pt_entry_t; /* Mach page table entry */
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#endif /* LOCORE */
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#define PT_ENTRY_NULL ((pt_entry_t *) 0)
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#define PG_PROT 0x00000003
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#define PG_RW 0x00000000
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#define PG_RO 0x00000001
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#define PG_WIRED 0x00000002
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#define PG_G 0x00000100
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#define PG_V 0x00000200
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#define PG_NV 0x00000000
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#define PG_M 0x00000400
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#define PG_N 0x00000800
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#define PG_FRAME 0xfffff000
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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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/*
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* Kernel virtual address to page table entry and visa versa.
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*/
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#define kvtopte(va) \
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((pt_entry_t *)PMAP_HASH_KADDR + \
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(((vm_offset_t)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT))
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#define ptetokv(pte) \
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((((pt_entry_t *)(pte) - PMAP_HASH_KADDR) << PGSHIFT) + \
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VM_MIN_KERNEL_ADDRESS)
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