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/* $OpenBSD: pte.h,v 1.12 2014/01/26 17:40:11 miod Exp $ */
/* $NetBSD: pte.h,v 1.26 1999/04/09 00:38:11 thorpej Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _MACHINE_PTE_H_
#define _MACHINE_PTE_H_
/*
* Alpha page table entry.
* Things which are in the VMS PALcode but not in the OSF PALcode
* are marked with "(VMS)".
*
* This information derived from pp. (II) 3-3 - (II) 3-6 and
* (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by
* Richard L. Sites.
*/
/*
* Alpha Page Table Entry
*/
#include <machine/alpha_cpu.h>
typedef alpha_pt_entry_t pt_entry_t;
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define PTESHIFT 3 /* pte size == 1 << PTESHIFT */
#define PG_V ALPHA_PTE_VALID
#define PG_NV 0
#define PG_FOR ALPHA_PTE_FAULT_ON_READ
#define PG_FOW ALPHA_PTE_FAULT_ON_WRITE
#define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE
#define PG_ASM ALPHA_PTE_ASM
#define PG_GH ALPHA_PTE_GRANULARITY
#define PG_KRE ALPHA_PTE_KR
#define PG_URE ALPHA_PTE_UR
#define PG_KWE ALPHA_PTE_KW
#define PG_UWE ALPHA_PTE_UW
#define PG_PROT (ALPHA_PTE_PROT | PG_EXEC | PG_FOE)
#define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */
#define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */
#define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */
#define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */
#define PG_FRAME ALPHA_PTE_PFN
#define PG_SHIFT 32
#define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x)
/*
* These are the PALcode PTE bits that we care about when checking to see
* if a PTE has changed in such a way as to require a TBI.
*/
#define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE)
#if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE)
#define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT)
#define NPTEPG (1L << NPTEPG_SHIFT)
#define PTEMASK (NPTEPG - 1)
#define l3pte_index(va) \
(((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK)
#define l2pte_index(va) \
(((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK)
#define l1pte_index(va) \
(((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK)
#define VPT_INDEX(va) \
(((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1))
/* Space mapped by one level 1 PTE */
#define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT))
/* Space mapped by one level 2 PTE */
#define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT))
#define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1))
#define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1))
#endif /* _KERNEL || __KVM_ALPHA_PRIVATE */
#ifdef _KERNEL
extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */
#endif /* _KERNEL */
#endif /* ! _MACHINE_PTE_H_ */
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