1 /* $NetBSD: pmap.h,v 1.7 1994/10/26 08:46:39 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1987 Carnegie-Mellon University 5 * Copyright (c) 1991 Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 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 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 /*- 41 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 42 * Michael L. Finch, Bradley A. Grantham, and 43 * Lawrence A. Kesteloot 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the Alice Group. 57 * 4. The names of the Alice Group or any of its members may not be used 58 * to endorse or promote products derived from this software without 59 * specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 64 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 65 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 66 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 70 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 * 72 */ 73 74 /* 75 * @(#)pmap.h 7.6 (Berkeley) 5/10/91 76 */ 77 #ifndef _PMAP_MACHINE_ 78 #define _PMAP_MACHINE_ 79 80 #define MAC_PAGE_SIZE NBPG 81 #define MAC_SEG_SIZE NBSEG 82 83 /* 84 * Pmap stuff 85 */ 86 struct pmap { 87 struct pte *pm_ptab; /* KVA of page table */ 88 struct ste *pm_stab; /* KVA of segment table */ 89 struct ste *pm_rtab; /* KVA of 68040 root table */ 90 int pm_stchanged; /* ST changed */ 91 short pm_sref; /* segment table ref count */ 92 short pm_count; /* pmap reference count */ 93 simple_lock_data_t pm_lock; /* lock on pmap */ 94 struct pmap_statistics pm_stats; /* pmap statistics */ 95 long pm_ptpages; /* more stats: PT pages */ 96 }; 97 98 typedef struct pmap *pmap_t; 99 100 extern pmap_t kernel_pmap; 101 102 /* 103 * Macros for speed 104 */ 105 #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 106 if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 107 (pcbp)->pcb_ustp = \ 108 mac68k_btop(pmap_extract(kernel_pmap, (vm_offset_t) \ 109 (cpu040 ? (pmapp)->pm_rtab : (pmapp)->pm_stab))); \ 110 if (iscurproc) \ 111 loadustp((pcbp)->pcb_ustp); \ 112 (pmapp)->pm_stchanged = FALSE; \ 113 } 114 #define PMAP_DEACTIVATE(pmapp, pcbp) 115 116 /* 117 * For each vm_page_t, there is a list of all currently valid virtual 118 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 119 */ 120 typedef struct pv_entry { 121 struct pv_entry *pv_next; /* next pv_entry */ 122 struct pmap *pv_pmap; /* pmap where mapping lies */ 123 vm_offset_t pv_va; /* virtual address for mapping */ 124 struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 125 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 126 int pv_flags; /* flags */ 127 } *pv_entry_t; 128 129 #define PV_CI 0x01 /* all entries must be cache inhibited */ 130 #define PV_PTPAGE 0x02 /* entry maps a page table page */ 131 132 #ifdef KERNEL 133 pv_entry_t pv_table; /* array of entries, one per page */ 134 135 #ifdef MACHINE_NONCONTIG 136 #define pa_index(pa) pmap_page_index(pa) 137 #else 138 #define pa_index(pa) atop(pa - vm_first_phys) 139 #endif 140 141 #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 142 143 #define pmap_kernel() (kernel_pmap) 144 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 145 146 extern struct pte *Sysmap; 147 extern char *vmmap; /* map for mem, dumps, etc. */ 148 #endif KERNEL 149 150 #endif _PMAP_MACHINE_ 151