1/* $OpenBSD: pte.h,v 1.12 2014/01/26 17:40:11 miod Exp $ */ 2/* $NetBSD: pte.h,v 1.26 1999/04/09 00:38:11 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Author: Chris G. Demetriou 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 */ 60 61#ifndef _MACHINE_PTE_H_ 62#define _MACHINE_PTE_H_ 63 64/* 65 * Alpha page table entry. 66 * Things which are in the VMS PALcode but not in the OSF PALcode 67 * are marked with "(VMS)". 68 * 69 * This information derived from pp. (II) 3-3 - (II) 3-6 and 70 * (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by 71 * Richard L. Sites. 72 */ 73 74/* 75 * Alpha Page Table Entry 76 */ 77 78#include <machine/alpha_cpu.h> 79 80typedef alpha_pt_entry_t pt_entry_t; 81 82#define PT_ENTRY_NULL ((pt_entry_t *) 0) 83#define PTESHIFT 3 /* pte size == 1 << PTESHIFT */ 84 85#define PG_V ALPHA_PTE_VALID 86#define PG_NV 0 87#define PG_FOR ALPHA_PTE_FAULT_ON_READ 88#define PG_FOW ALPHA_PTE_FAULT_ON_WRITE 89#define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE 90#define PG_ASM ALPHA_PTE_ASM 91#define PG_GH ALPHA_PTE_GRANULARITY 92#define PG_KRE ALPHA_PTE_KR 93#define PG_URE ALPHA_PTE_UR 94#define PG_KWE ALPHA_PTE_KW 95#define PG_UWE ALPHA_PTE_UW 96#define PG_PROT (ALPHA_PTE_PROT | PG_EXEC | PG_FOE) 97#define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */ 98#define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */ 99#define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */ 100#define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */ 101#define PG_FRAME ALPHA_PTE_PFN 102#define PG_SHIFT 32 103#define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x) 104 105/* 106 * These are the PALcode PTE bits that we care about when checking to see 107 * if a PTE has changed in such a way as to require a TBI. 108 */ 109#define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE) 110 111#if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE) 112#define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT) 113#define NPTEPG (1L << NPTEPG_SHIFT) 114 115#define PTEMASK (NPTEPG - 1) 116 117#define l3pte_index(va) \ 118 (((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK) 119 120#define l2pte_index(va) \ 121 (((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK) 122 123#define l1pte_index(va) \ 124 (((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK) 125 126#define VPT_INDEX(va) \ 127 (((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1)) 128 129/* Space mapped by one level 1 PTE */ 130#define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT)) 131 132/* Space mapped by one level 2 PTE */ 133#define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT)) 134 135#define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1)) 136#define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1)) 137#endif /* _KERNEL || __KVM_ALPHA_PRIVATE */ 138 139#ifdef _KERNEL 140extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */ 141#endif /* _KERNEL */ 142 143#endif /* ! _MACHINE_PTE_H_ */ 144