/*      $NetBSD: pte3.h,v 1.18 2009/01/12 06:53:39 tsutsui Exp $        */

/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass and Gordon W. Ross.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#ifndef _MACHINE_PTE3_H
#define _MACHINE_PTE3_H

#define NCONTEXT 8
#define NPMEG   256
#define SEGINV  (NPMEG-1)
#define NPAGSEG 16
#define NSEGMAP 2048

#define PG_VALID   0x80000000
#define PG_WRITE   0x40000000
#define PG_SYSTEM  0x20000000
#define PG_NC      0x10000000
#define PG_TYPE    0x0C000000
#define PG_REF     0x02000000
#define PG_MOD     0x01000000

#define PG_SPECIAL (PG_VALID|PG_WRITE|PG_SYSTEM|PG_NC|PG_REF|PG_MOD)
#define PG_PERM    (PG_VALID|PG_WRITE|PG_SYSTEM|PG_NC)
#define PG_MODREF  (PG_REF|PG_MOD)
#define PG_FRAME   0x0007FFFF

#define PG_MOD_SHIFT 24
#define PG_PERM_SHIFT 28

#define OBMEM   0
#define OBIO    1
#define VME_D16 2
#define VME_D32 3
#define PG_TYPE_SHIFT 26

#define PG_INVAL   0x0

#define MAKE_PGTYPE(x) ((x) << PG_TYPE_SHIFT)
#define PG_PFNUM(pte) (pte & PG_FRAME)
#define PG_PA(pte) (PG_PFNUM(pte) << PGSHIFT)

#define PGT_MASK        MAKE_PGTYPE(3)
#define PGT_OBMEM       MAKE_PGTYPE(OBMEM)              /* onboard memory */
#define PGT_OBIO        MAKE_PGTYPE(OBIO)               /* onboard I/O */
#define PGT_VME_D16     MAKE_PGTYPE(VME_D16)    /* VMEbus 16-bit data */
#define PGT_VME_D32     MAKE_PGTYPE(VME_D32)    /* VMEbus 32-bit data */

#define VA_SEGNUM(x)    ((u_int)(x) >> SEGSHIFT)

#define VA_PTE_NUM_SHIFT  13
#define VA_PTE_NUM_MASK (0xF << VA_PTE_NUM_SHIFT)
#define VA_PTE_NUM(va) (((va) & VA_PTE_NUM_MASK) >> VA_PTE_NUM_SHIFT)

#define PA_PGNUM(pa) ((unsigned)(pa) >> PGSHIFT)

#endif /* _MACHINE_PTE3_H */