1 /* $NetBSD: pte.h,v 1.27 2002/10/14 05:11:23 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 #ifndef _ALPHA_PTE_H_ 68 #define _ALPHA_PTE_H_ 69 70 /* 71 * Alpha page table entry. 72 * Things which are in the VMS PALcode but not in the OSF PALcode 73 * are marked with "(VMS)". 74 * 75 * This information derived from pp. (II) 3-3 - (II) 3-6 and 76 * (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by 77 * Richard L. Sites. 78 */ 79 80 /* 81 * Alpha Page Table Entry 82 */ 83 84 #include <machine/alpha_cpu.h> 85 86 typedef alpha_pt_entry_t pt_entry_t; 87 88 #define PTESHIFT 3 /* pte size == 1 << PTESHIFT */ 89 90 #define PG_V ALPHA_PTE_VALID 91 #define PG_NV 0 92 #define PG_FOR ALPHA_PTE_FAULT_ON_READ 93 #define PG_FOW ALPHA_PTE_FAULT_ON_WRITE 94 #define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE 95 #define PG_ASM ALPHA_PTE_ASM 96 #define PG_GH ALPHA_PTE_GRANULARITY 97 #define PG_KRE ALPHA_PTE_KR 98 #define PG_URE ALPHA_PTE_UR 99 #define PG_KWE ALPHA_PTE_KW 100 #define PG_UWE ALPHA_PTE_UW 101 #define PG_PROT ALPHA_PTE_PROT 102 #define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */ 103 #define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */ 104 #define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */ 105 #define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */ 106 #define PG_FRAME ALPHA_PTE_RAME 107 #define PG_SHIFT 32 108 #define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x) 109 110 /* 111 * These are the PALcode PTE bits that we care about when checking to see 112 * if a PTE has changed in such a way as to require a TBI. 113 */ 114 #define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE) 115 116 #if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE) 117 #define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT) 118 #define NPTEPG (1L << NPTEPG_SHIFT) 119 120 #define PTEMASK (NPTEPG - 1) 121 122 #define l3pte_index(va) \ 123 (((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK) 124 125 #define l2pte_index(va) \ 126 (((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK) 127 128 #define l1pte_index(va) \ 129 (((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK) 130 131 #define VPT_INDEX(va) \ 132 (((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1)) 133 134 /* Space mapped by one level 1 PTE */ 135 #define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT)) 136 137 /* Space mapped by one level 2 PTE */ 138 #define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT)) 139 140 #define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1)) 141 #define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1)) 142 #endif /* _KERNEL || __KVM_ALPHA_PRIVATE */ 143 144 #ifdef _KERNEL 145 extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */ 146 #endif /* _KERNEL */ 147 148 #endif /* ! _ALPHA_PTE_H_ */ 149