1 /* 2 * Copyright (c) 1987 Carnegie-Mellon University 3 * Copyright (c) 1991 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 /* 73 * @(#)pmap.h 7.6 (Berkeley) 5/10/91 74 */ 75 #ifndef _PMAP_MACHINE_ 76 #define _PMAP_MACHINE_ 77 #ident "$Id: pmap.h,v 1.1.1.1 1993/09/29 06:09:22 briggs Exp $" 78 79 #define MAC_PAGE_SIZE NBPG 80 #define MAC_SEG_SIZE NBSEG 81 82 /* 83 * Pmap stuff 84 */ 85 struct pmap { 86 struct pte *pm_ptab; /* KVA of page table */ 87 struct ste *pm_stab; /* KVA of segment table */ 88 int pm_stchanged; /* ST changed */ 89 short pm_sref; /* segment table ref count */ 90 short pm_count; /* pmap reference count */ 91 simple_lock_data_t pm_lock; /* lock on pmap */ 92 struct pmap_statistics pm_stats; /* pmap statistics */ 93 long pm_ptpages; /* more stats: PT pages */ 94 }; 95 96 typedef struct pmap *pmap_t; 97 98 extern pmap_t kernel_pmap; 99 100 /* 101 * Macros for speed 102 */ 103 #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 104 if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 105 (pcbp)->pcb_ustp = \ 106 macII_btop(pmap_extract(kernel_pmap, (pmapp)->pm_stab)); \ 107 if (iscurproc) \ 108 loadustp((pcbp)->pcb_ustp); \ 109 (pmapp)->pm_stchanged = FALSE; \ 110 } 111 #define PMAP_DEACTIVATE(pmapp, pcbp) 112 113 /* 114 * For each vm_page_t, there is a list of all currently valid virtual 115 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 116 */ 117 typedef struct pv_entry { 118 struct pv_entry *pv_next; /* next pv_entry */ 119 struct pmap *pv_pmap; /* pmap where mapping lies */ 120 vm_offset_t pv_va; /* virtual address for mapping */ 121 struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 122 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 123 int pv_flags; /* flags */ 124 } *pv_entry_t; 125 126 #define PV_CI 0x01 /* all entries must be cache inhibited */ 127 #define PV_PTPAGE 0x02 /* entry maps a page table page */ 128 129 #ifdef KERNEL 130 pv_entry_t pv_table; /* array of entries, one per page */ 131 132 #define pa_index(pa) atop(pa - vm_first_phys) 133 #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 134 135 #define pmap_kernel() (kernel_pmap) 136 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 137 138 extern struct pte *Sysmap; 139 extern char *vmmap; /* map for mem, dumps, etc. */ 140 #endif KERNEL 141 142 #endif _PMAP_MACHINE_ 143