1 /* $NetBSD: pte.h,v 1.31 2012/02/06 02:14:13 matt 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #ifndef _ALPHA_PTE_H_ 61 #define _ALPHA_PTE_H_ 62 63 /* 64 * Alpha page table entry. 65 * Things which are in the VMS PALcode but not in the OSF PALcode 66 * are marked with "(VMS)". 67 * 68 * This information derived from pp. (II) 3-3 - (II) 3-6 and 69 * (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by 70 * Richard L. Sites. 71 */ 72 73 /* 74 * Alpha Page Table Entry 75 */ 76 77 #include <machine/alpha_cpu.h> 78 79 typedef alpha_pt_entry_t pt_entry_t; 80 81 #define PTESHIFT 3 /* pte size == 1 << PTESHIFT */ 82 83 #define PG_V ALPHA_PTE_VALID 84 #define PG_NV 0 85 #define PG_FOR ALPHA_PTE_FAULT_ON_READ 86 #define PG_FOW ALPHA_PTE_FAULT_ON_WRITE 87 #define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE 88 #define PG_ASM ALPHA_PTE_ASM 89 #define PG_GH ALPHA_PTE_GRANULARITY 90 #define PG_KRE ALPHA_PTE_KR 91 #define PG_URE ALPHA_PTE_UR 92 #define PG_KWE ALPHA_PTE_KW 93 #define PG_UWE ALPHA_PTE_UW 94 #define PG_PROT (ALPHA_PTE_PROT | PG_EXEC | PG_FOE) 95 #define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */ 96 #define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */ 97 #define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */ 98 #define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */ 99 #define PG_FRAME ALPHA_PTE_PFN 100 #define PG_SHIFT 32 101 #define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x) 102 103 /* 104 * These are the PALcode PTE bits that we care about when checking to see 105 * if a PTE has changed in such a way as to require a TBI. 106 */ 107 #define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE) 108 109 #if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE) 110 #define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT) 111 #define NPTEPG (1L << NPTEPG_SHIFT) 112 113 #define PTEMASK (NPTEPG - 1) 114 115 #define l3pte_index(va) \ 116 (((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK) 117 118 #define l2pte_index(va) \ 119 (((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK) 120 121 #define l1pte_index(va) \ 122 (((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK) 123 124 #define VPT_INDEX(va) \ 125 (((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1)) 126 127 /* Space mapped by one level 1 PTE */ 128 #define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT)) 129 130 /* Space mapped by one level 2 PTE */ 131 #define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT)) 132 133 #define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1)) 134 #define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1)) 135 #endif /* _KERNEL || __KVM_ALPHA_PRIVATE */ 136 137 #ifdef _KERNEL 138 extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */ 139 #endif /* _KERNEL */ 140 141 #endif /* ! _ALPHA_PTE_H_ */ 142
Indexes created Sat Sep 20 22:09:52 GMT 2025