135 lines
4.9 KiB
C
135 lines
4.9 KiB
C
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. 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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*
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* from: @(#)pte.h 8.1 (Berkeley) 6/10/93
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* $Id: pte.h,v 1.1.1.1 1996/03/13 04:58:08 jonathan Exp $
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*/
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/*
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* R4000 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_prot:2, /* SW: access control */
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pg_pfnum:24, /* HW: core page frame number or 0 */
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pg_attr:3, /* HW: cache attribute */
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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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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int 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_attr:3, /* HW: cache attribute */
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pg_pfnum:24, /* HW: core page frame number or 0 */
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pg_prot:2; /* SW: access control */
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#endif
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};
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/*
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* Structure defining an tlb entry data set.
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*/
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struct tlb {
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int tlb_mask;
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int tlb_hi;
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int tlb_lo0;
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int tlb_lo1;
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};
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typedef union pt_entry {
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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_WIRED 0x80000000 /* SW */
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#define PG_RO 0x40000000 /* SW */
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#define PG_SVPN 0xfffff000 /* Software page no mask */
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#define PG_HVPN 0xffffe000 /* Hardware page no mask */
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#define PG_ODDPG 0x00001000 /* Odd even pte entry */
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#define PG_ASID 0x000000ff /* Address space ID */
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#define PG_G 0x00000001 /* HW */
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#define PG_V 0x00000002
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#define PG_NV 0x00000000
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#define PG_M 0x00000004
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#define PG_ATTR 0x0000003f
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#define PG_UNCACHED 0x00000010
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#define PG_CACHED 0x00000018
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#define PG_CACHEMODE 0x00000038
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#define PG_ROPAGE (PG_V | PG_RO | PG_CACHED) /* Write protected */
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#define PG_RWPAGE (PG_V | PG_M | PG_CACHED) /* Not wr-prot not clean */
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#define PG_CWPAGE (PG_V | PG_CACHED) /* Not wr-prot but clean */
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#define PG_IOPAGE (PG_G | PG_V | PG_M | PG_UNCACHED)
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#define PG_FRAME 0x3fffffc0
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#define PG_SHIFT 6
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#define vad_to_pfn(x) (((unsigned)(x) >> PG_SHIFT) & PG_FRAME)
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#define pfn_to_vad(x) (((x) & PG_FRAME) << PG_SHIFT)
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#define vad_to_vpn(x) ((unsigned)(x) & PG_SVPN)
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#define vpn_to_vad(x) ((x) & PG_SVPN)
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/* User viritual to pte page entry */
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#define uvtopte(adr) (((adr) >> PGSHIFT) & (NPTEPG -1))
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#define PG_SIZE_4K 0x00000000
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#define PG_SIZE_16K 0x00006000
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#define PG_SIZE_64K 0x0001e000
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#define PG_SIZE_256K 0x0007e000
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#define PG_SIZE_1M 0x001fe000
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#define PG_SIZE_4M 0x007fe000
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#define PG_SIZE_16M 0x01ffe000
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#if defined(_KERNEL) && !defined(LOCORE)
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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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(Sysmap + (((vm_offset_t)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT))
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#define ptetokv(pte) \
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((((pt_entry_t *)(pte) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
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extern pt_entry_t *Sysmap; /* kernel pte table */
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extern u_int Sysmapsize; /* number of pte's in Sysmap */
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#endif
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