pte.h revision 1.1.1.1
1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1982, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 /*- 39 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 40 * Michael L. Finch, Bradley A. Grantham, and 41 * Lawrence A. Kesteloot 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the Alice Group. 55 * 4. The names of the Alice Group or any of its members may not be used 56 * to endorse or promote products derived from this software without 57 * specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 63 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 64 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 65 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 68 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 69 * 70 */ 71 #ident "$Id: pte.h,v 1.1.1.1 1993/09/29 06:09:21 briggs Exp $" 72 /* 73 * from: Utah $Hdr: pte.h 1.11 89/09/03$ 74 * 75 * @(#)pte.h 7.3 (Berkeley) 5/8/91 76 */ 77 78 /* 79 * Mac hardware segment/page table entries 80 */ 81 82 struct ste { 83 unsigned int sg_pfnum:20; /* page table frame number */ 84 unsigned int :8; /* reserved at 0 */ 85 unsigned int :1; /* reserved at 1 */ 86 unsigned int sg_prot:1; /* write protect bit */ 87 unsigned int sg_v:2; /* valid bits */ 88 }; 89 90 struct pte { 91 unsigned int pg_pfnum:20; /* page frame number or 0 */ 92 unsigned int :3; 93 unsigned int pg_w:1; /* is wired */ 94 unsigned int :1; /* reserved at zero */ 95 unsigned int pg_ci:1; /* cache inhibit bit */ 96 unsigned int :1; /* reserved at zero */ 97 unsigned int pg_m:1; /* hardware modified (dirty) bit */ 98 unsigned int pg_u:1; /* hardware used (reference) bit */ 99 unsigned int pg_prot:1; /* write protect bit */ 100 unsigned int pg_v:2; /* valid bit */ 101 }; 102 103 typedef struct ste st_entry_t; /* segment table entry */ 104 typedef struct pte pt_entry_t; /* Mach page table entry */ 105 106 #define PT_ENTRY_NULL ((pt_entry_t *) 0) 107 #define ST_ENTRY_NULL ((st_entry_t *) 0) 108 109 #define SG_V 0x00000002 /* segment is valid */ 110 #define SG_NV 0x00000000 111 #define SG_PROT 0x00000004 /* access protection mask */ 112 #define SG_RO 0x00000004 113 #define SG_RW 0x00000000 114 #define SG_FRAME 0xfffff000 115 #define SG_IMASK 0xffc00000 116 #define SG_PMASK 0x003ff000 117 #define SG_ISHIFT 22 118 #define SG_PSHIFT 12 119 120 #define PG_V 0x00000001 121 #define PG_NV 0x00000000 122 #define PG_PROT 0x00000004 123 #define PG_U 0x00000008 124 #define PG_M 0x00000010 125 #define PG_W 0x00000100 126 #define PG_RO 0x00000004 127 #define PG_RW 0x00000000 128 #define PG_FRAME 0xfffff000 129 #define PG_CI 0x00000040 130 #define PG_SHIFT 12 131 #define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT) 132 133 #define MAC_STSIZE MAC_PAGE_SIZE /* segment table size */ 134 #define MAC_MAX_PTSIZE MAC_SEG_SIZE /* max size of UPT */ 135 #define MAC_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */ 136 #define MAC_PTBASE 0x60000000 /* UPT map base address */ 137 /* 9/2 BG changed from 0x10000000 */ 138 #define MAC_PTMAXSIZE 0x70000000 /* UPT map maximum size */ 139 140 /* 141 * Kernel virtual address to page table entry and to physical address. 142 */ 143 #define kvtopte(va) \ 144 (&Sysmap[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT]) 145 #define kvtoste(va) \ 146 (&Sysseg[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> SEGSHIFT]) 147 #define ptetokv(pt) \ 148 ((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS) 149 #define kvtophys(va) \ 150 ((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET)) 151 152
Indexes created Thu Oct 23 22:10:10 GMT 2025