pte.h revision 1.4
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 /* 72 * from: Utah $Hdr: pte.h 1.11 89/09/03$ 73 * 74 * from: @(#)pte.h 7.3 (Berkeley) 5/8/91 75 * $Id: pte.h,v 1.4 1994/04/21 23:15:32 briggs Exp $ 76 */ 77 78 #ifndef _MACHINE_PTE_H_ 79 #define _MACHINE_PTE_H_ 1 80 81 /* 82 * Mac hardware segment/page table entries 83 */ 84 85 struct ste { 86 unsigned int sg_pfnum:20; /* page table frame number */ 87 unsigned int :8; /* reserved at 0 */ 88 unsigned int :1; /* reserved at 1 */ 89 unsigned int sg_prot:1; /* write protect bit */ 90 unsigned int sg_v:2; /* valid bits */ 91 }; 92 93 struct pte { 94 unsigned int pg_pfnum:20; /* page frame number or 0 */ 95 unsigned int :3; 96 unsigned int pg_w:1; /* is wired */ 97 unsigned int :1; /* reserved at zero */ 98 unsigned int pg_ci:1; /* cache inhibit bit */ 99 unsigned int pg_cm1:1; /* cache mode, lsb (68040) */ 100 unsigned int pg_m:1; /* hardware modified (dirty) bit */ 101 unsigned int pg_u:1; /* hardware used (reference) bit */ 102 unsigned int pg_prot:1; /* write protect bit */ 103 unsigned int pg_v:2; /* valid bit */ 104 }; 105 106 typedef struct ste st_entry_t; /* segment table entry */ 107 typedef struct pte pt_entry_t; /* Mach page table entry */ 108 109 #define PT_ENTRY_NULL ((pt_entry_t *) 0) 110 #define ST_ENTRY_NULL ((st_entry_t *) 0) 111 112 #define SG_V 0x00000002 /* segment is valid */ 113 #define SG_NV 0x00000000 114 #define SG_PROT 0x00000004 /* access protection mask */ 115 #define SG_RO 0x00000004 116 #define SG_RW 0x00000000 117 #define SG_FRAME 0xfffff000 118 #define SG_IMASK1 0xfe000000 119 #define SG_IMASK2 0x01fc0000 120 #define SG_040IMASK 0xfffc0000 121 #define SG_040PMASK 0x0003f000 122 #define SG_ISHIFT1 25 123 #define SG_040ISHIFT 18 124 #define SG_IMASK 0xffc00000 125 #define SG_PMASK 0x003ff000 126 #define SG_ISHIFT 22 127 #define SG_PSHIFT 12 128 129 #define PG_V 0x00000001 130 #define PG_NV 0x00000000 131 #define PG_PROT 0x00000004 132 #define PG_U 0x00000008 133 #define PG_M 0x00000010 134 #define PG_W 0x00000100 135 #define PG_RO 0x00000004 136 #define PG_RW 0x00000000 137 #define PG_CI 0x00000040 138 #define PG_CC 0x00000020 139 #define PG_CIN 0x00000060 140 #define PG_FRAME 0xfffff000 141 #define PG_SHIFT 12 142 #define PG_PFNUM(x) (((x) & PG_FRAME) >> PG_SHIFT) 143 144 #define MAC_040RTSIZE 512 /* root (level 1) table size */ 145 #define MAC_040STSIZE 512 /* segment (level 2) table size */ 146 #define MAC_040PTSIZE 128 /* page (level 3) table size */ 147 #define MAC_STSIZE MAC_PAGE_SIZE /* segment table size */ 148 #define MAC_MAX_PTSIZE MAC_SEG_SIZE /* max size of UPT */ 149 #define MAC_MAX_KPTSIZE 0x100000 /* max memory to allocate to KPT */ 150 #define MAC_PTBASE 0x60100000 /* UPT map base address */ 151 #define MAC_PTMAXSIZE 0x70000000 /* UPT map maximum size */ 152 153 /* 154 * Kernel virtual address to page table entry and to physical address. 155 */ 156 #define kvtopte(va) \ 157 (&Sysmap[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT]) 158 #define kvtoste(va) \ 159 (&Sysseg[((unsigned)(va) - VM_MIN_KERNEL_ADDRESS) >> SEGSHIFT]) 160 #define ptetokv(pt) \ 161 ((((pt_entry_t *)(pt) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS) 162 #define kvtophys(va) \ 163 ((kvtopte(va)->pg_pfnum << PGSHIFT) | ((int)(va) & PGOFSET)) 164 165 #endif /* _MACHINE_PTE_H_ */ 166
Indexes created Thu Oct 23 18:09:57 GMT 2025