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 * @(#)pmap.h 7.6 (Berkeley) 5/10/91 39 */ 40 41 #ifndef _PMAP_MACHINE_ 42 #define _PMAP_MACHINE_ 43 44 #define AMIGA_PAGE_SIZE NBPG 45 #define AMIGA_SEG_SIZE NBSEG 46 47 /* 48 * Pmap stuff 49 */ 50 struct pmap { 51 struct pte *pm_ptab; /* KVA of page table */ 52 struct ste *pm_stab; /* KVA of segment table */ 53 int pm_stchanged; /* ST changed */ 54 short pm_sref; /* segment table ref count */ 55 short pm_count; /* pmap reference count */ 56 simple_lock_data_t pm_lock; /* lock on pmap */ 57 struct pmap_statistics pm_stats; /* pmap statistics */ 58 long pm_ptpages; /* more stats: PT pages */ 59 }; 60 61 typedef struct pmap *pmap_t; 62 63 extern pmap_t kernel_pmap; 64 65 /* 66 * Macros for speed 67 */ 68 #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 69 if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 70 (pcbp)->pcb_ustp = \ 71 amiga_btop(pmap_extract(kernel_pmap, (pmapp)->pm_stab)); \ 72 if (iscurproc) \ 73 loadustp((pcbp)->pcb_ustp); \ 74 (pmapp)->pm_stchanged = FALSE; \ 75 } 76 #define PMAP_DEACTIVATE(pmapp, pcbp) 77 78 /* 79 * For each vm_page_t, there is a list of all currently valid virtual 80 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 81 */ 82 typedef struct pv_entry { 83 struct pv_entry *pv_next; /* next pv_entry */ 84 struct pmap *pv_pmap; /* pmap where mapping lies */ 85 vm_offset_t pv_va; /* virtual address for mapping */ 86 struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 87 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 88 int pv_flags; /* flags */ 89 } *pv_entry_t; 90 91 #define PV_CI 0x01 /* all entries must be cache inhibited */ 92 #define PV_PTPAGE 0x02 /* entry maps a page table page */ 93 94 #ifdef KERNEL 95 pv_entry_t pv_table; /* array of entries, one per page */ 96 97 #define pa_index(pa) atop(pa - vm_first_phys) 98 #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 99 100 #define pmap_kernel() (kernel_pmap) 101 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 102 103 extern struct pte *Sysmap; 104 extern char *vmmap; /* map for mem, dumps, etc. */ 105 #endif KERNEL 106 107 #endif _PMAP_MACHINE_ 108