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/* $OpenBSD: pte.h,v 1.4 1997/03/31 00:24:07 downsj Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 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.
*
* 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 $Hdr: pte.h 1.13 92/01/20$
*
* @(#)pte.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _MVME68K_PTE_H_
#define _MVME68K_PTE_H_
/*
* m68k hardware segment/page table entries
*/
#if 0
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 ste40 {
unsigned int sg_ptaddr:24; /* page table page addr */
unsigned int :4; /* reserved at 0 */
unsigned int sg_u; /* hardware modified (dirty) bit */
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 */
};
#endif
typedef int st_entry_t; /* segment table entry */
typedef int 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_U 0x00000008 /* modified bit (68040) */
#define SG_FRAME 0xfffff000
#define SG_IMASK 0xffc00000
#define SG_ISHIFT 22
#define SG_PMASK 0x003ff000
#define SG_PSHIFT 12
/* 68040 additions */
#define SG4_MASK1 0xfe000000
#define SG4_SHIFT1 25
#define SG4_MASK2 0x01fc0000
#define SG4_SHIFT2 18
#define SG4_MASK3 0x0003f000
#define SG4_SHIFT3 12
#define SG4_ADDR1 0xfffffe00
#define SG4_ADDR2 0xffffff00
#define SG4_LEV1SIZE 128
#define SG4_LEV2SIZE 128
#define SG4_LEV3SIZE 64
#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)
/* 68040 additions */
#define PG_CMASK 0x00000060 /* cache mode mask */
#define PG_CWT 0x00000000 /* writethrough caching */
#define PG_CCB 0x00000020 /* copyback caching */
#define PG_CIS 0x00000040 /* cache inhibited serialized */
#define PG_CIN 0x00000060 /* cache inhibited nonserialized */
#define PG_SO 0x00000080 /* supervisor only */
#define M68K_STSIZE (MAXUL2SIZE*SG4_LEV2SIZE*sizeof(st_entry_t))
/* user process segment table size */
#define M68K_MAX_PTSIZE 0x400000 /* max size of UPT */
#define M68K_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */
#define M68K_PTBASE 0x10000000 /* UPT map base address */
#define M68K_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 ptetokv(pt) \
((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
#define kvtophys(va) \
((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET))
#endif /* !_MVME68K_PTE_H_ */
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