pmap.h revision 1.7
1 1.1 mw /* 2 1.1 mw * Copyright (c) 1987 Carnegie-Mellon University 3 1.1 mw * Copyright (c) 1991 Regents of the University of California. 4 1.1 mw * All rights reserved. 5 1.1 mw * 6 1.1 mw * This code is derived from software contributed to Berkeley by 7 1.1 mw * the Systems Programming Group of the University of Utah Computer 8 1.1 mw * Science Department. 9 1.1 mw * 10 1.1 mw * Redistribution and use in source and binary forms, with or without 11 1.1 mw * modification, are permitted provided that the following conditions 12 1.1 mw * are met: 13 1.1 mw * 1. Redistributions of source code must retain the above copyright 14 1.1 mw * notice, this list of conditions and the following disclaimer. 15 1.1 mw * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 mw * notice, this list of conditions and the following disclaimer in the 17 1.1 mw * documentation and/or other materials provided with the distribution. 18 1.1 mw * 3. All advertising materials mentioning features or use of this software 19 1.1 mw * must display the following acknowledgement: 20 1.1 mw * This product includes software developed by the University of 21 1.1 mw * California, Berkeley and its contributors. 22 1.1 mw * 4. Neither the name of the University nor the names of its contributors 23 1.1 mw * may be used to endorse or promote products derived from this software 24 1.1 mw * without specific prior written permission. 25 1.1 mw * 26 1.1 mw * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.1 mw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.1 mw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.1 mw * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.1 mw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.1 mw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.1 mw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.1 mw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.1 mw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.1 mw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.1 mw * SUCH DAMAGE. 37 1.1 mw * 38 1.3 mw * @(#)pmap.h 7.6 (Berkeley) 5/10/91 39 1.7 chopps * $Id: pmap.h,v 1.7 1994/04/10 02:28:30 chopps Exp $ 40 1.1 mw */ 41 1.7 chopps #ifndef _MACHINE_PMAP_H_ 42 1.7 chopps #define _MACHINE_PMAP_H_ 43 1.1 mw 44 1.1 mw #define AMIGA_PAGE_SIZE NBPG 45 1.1 mw #define AMIGA_SEG_SIZE NBSEG 46 1.1 mw 47 1.1 mw /* 48 1.3 mw * Pmap stuff (in anticipation of '40 support) 49 1.1 mw */ 50 1.3 mw 51 1.1 mw struct pmap { 52 1.1 mw struct pte *pm_ptab; /* KVA of page table */ 53 1.1 mw struct ste *pm_stab; /* KVA of segment table */ 54 1.3 mw struct ste *pm_rtab; /* KVA of 68040 root table */ 55 1.1 mw int pm_stchanged; /* ST changed */ 56 1.1 mw short pm_sref; /* segment table ref count */ 57 1.1 mw short pm_count; /* pmap reference count */ 58 1.1 mw simple_lock_data_t pm_lock; /* lock on pmap */ 59 1.1 mw struct pmap_statistics pm_stats; /* pmap statistics */ 60 1.1 mw long pm_ptpages; /* more stats: PT pages */ 61 1.1 mw }; 62 1.1 mw 63 1.1 mw typedef struct pmap *pmap_t; 64 1.1 mw 65 1.1 mw extern pmap_t kernel_pmap; 66 1.1 mw 67 1.1 mw /* 68 1.1 mw * Macros for speed 69 1.1 mw */ 70 1.1 mw #define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \ 71 1.1 mw if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \ 72 1.1 mw (pcbp)->pcb_ustp = \ 73 1.4 mw amiga_btop(pmap_extract(kernel_pmap, \ 74 1.4 mw cpu040 ? (pmapp)->pm_rtab : (pmapp)->pm_stab)); \ 75 1.1 mw if (iscurproc) \ 76 1.1 mw loadustp((pcbp)->pcb_ustp); \ 77 1.1 mw (pmapp)->pm_stchanged = FALSE; \ 78 1.1 mw } 79 1.1 mw #define PMAP_DEACTIVATE(pmapp, pcbp) 80 1.1 mw 81 1.1 mw /* 82 1.1 mw * For each vm_page_t, there is a list of all currently valid virtual 83 1.1 mw * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 84 1.1 mw */ 85 1.1 mw typedef struct pv_entry { 86 1.1 mw struct pv_entry *pv_next; /* next pv_entry */ 87 1.1 mw struct pmap *pv_pmap; /* pmap where mapping lies */ 88 1.1 mw vm_offset_t pv_va; /* virtual address for mapping */ 89 1.1 mw struct ste *pv_ptste; /* non-zero if VA maps a PT page */ 90 1.1 mw struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 91 1.1 mw int pv_flags; /* flags */ 92 1.1 mw } *pv_entry_t; 93 1.1 mw 94 1.1 mw #define PV_CI 0x01 /* all entries must be cache inhibited */ 95 1.1 mw #define PV_PTPAGE 0x02 /* entry maps a page table page */ 96 1.1 mw 97 1.1 mw #ifdef KERNEL 98 1.1 mw pv_entry_t pv_table; /* array of entries, one per page */ 99 1.1 mw 100 1.1 mw #define pa_index(pa) atop(pa - vm_first_phys) 101 1.1 mw #define pa_to_pvh(pa) (&pv_table[pa_index(pa)]) 102 1.1 mw 103 1.1 mw #define pmap_kernel() (kernel_pmap) 104 1.1 mw #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 105 1.1 mw 106 1.1 mw extern struct pte *Sysmap; 107 1.1 mw extern char *vmmap; /* map for mem, dumps, etc. */ 108 1.1 mw #endif KERNEL 109 1.1 mw 110 1.7 chopps #endif /* !_MACHINE_PMAP_H_ */ 111
Indexes created Thu Sep 25 16:09:42 GMT 2025