107 lines
4.0 KiB
C
107 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1992, 1993
|
|
* 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 and Ralph Campbell.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: Utah Hdr: pte.h 1.11 89/09/03
|
|
*
|
|
* from: @(#)pte.h 8.1 (Berkeley) 6/10/93
|
|
* $Id: pte.h,v 1.3 1994/05/27 09:01:59 glass Exp $
|
|
*/
|
|
|
|
/*
|
|
* R2000 hardware page table entry
|
|
*/
|
|
|
|
#ifndef LOCORE
|
|
struct pte {
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
unsigned int pg_pfnum:20, /* HW: core page frame number or 0 */
|
|
pg_n:1, /* HW: non-cacheable bit */
|
|
pg_m:1, /* HW: modified (dirty) bit */
|
|
pg_v:1, /* HW: valid bit */
|
|
pg_g:1, /* HW: ignore pid bit */
|
|
:4,
|
|
pg_swapm:1, /* SW: page must be forced to swap */
|
|
pg_fod:1, /* SW: is fill on demand (=0) */
|
|
pg_prot:2; /* SW: access control */
|
|
#endif
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
|
unsigned int pg_prot:2, /* SW: access control */
|
|
pg_fod:1, /* SW: is fill on demand (=0) */
|
|
pg_swapm:1, /* SW: page must be forced to swap */
|
|
:4,
|
|
pg_g:1, /* HW: ignore pid bit */
|
|
pg_v:1, /* HW: valid bit */
|
|
pg_m:1, /* HW: modified (dirty) bit */
|
|
pg_n:1, /* HW: non-cacheable bit */
|
|
pg_pfnum:20; /* HW: core page frame number or 0 */
|
|
#endif
|
|
};
|
|
|
|
typedef union pt_entry {
|
|
unsigned int pt_entry; /* for copying, etc. */
|
|
struct pte pt_pte; /* for getting to bits by name */
|
|
} pt_entry_t; /* Mach page table entry */
|
|
#endif /* LOCORE */
|
|
|
|
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
|
|
|
|
#define PG_PROT 0x00000003
|
|
#define PG_RW 0x00000000
|
|
#define PG_RO 0x00000001
|
|
#define PG_WIRED 0x00000002
|
|
#define PG_G 0x00000100
|
|
#define PG_V 0x00000200
|
|
#define PG_NV 0x00000000
|
|
#define PG_M 0x00000400
|
|
#define PG_N 0x00000800
|
|
#define PG_FRAME 0xfffff000
|
|
#define PG_SHIFT 12
|
|
#define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT)
|
|
|
|
#if defined(KERNEL) && !defined(LOCORE)
|
|
/*
|
|
* Kernel virtual address to page table entry and visa versa.
|
|
*/
|
|
#define kvtopte(va) \
|
|
(Sysmap + (((vm_offset_t)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT))
|
|
#define ptetokv(pte) \
|
|
((((pt_entry_t *)(pte) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
|
|
|
|
extern pt_entry_t *Sysmap; /* kernel pte table */
|
|
extern u_int Sysmapsize; /* number of pte's in Sysmap */
|
|
#endif
|