1 /* $NetBSD: pmap.h,v 1.17 1996/07/20 17:58:22 ragge 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 * Changed for the VAX port. /IC 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)pmap.h 7.6 (Berkeley) 5/10/91 43 */ 44 45 46 #ifndef PMAP_H 47 #define PMAP_H 48 49 #include <machine/mtpr.h> 50 51 52 #define VAX_PAGE_SIZE NBPG 53 #define VAX_SEG_SIZE NBSEG 54 55 /* 56 * Pmap structure 57 * 58 * p0br == PR_P0BR in user struct, p0br is also == SBR in pmap_kernel() 59 * p1br is the same for stack space, stack is base of alloced pte mem 60 */ 61 62 typedef struct pmap { 63 vm_offset_t pm_stack; /* Base of alloced p1 pte space */ 64 struct pcb *pm_pcb; /* Pointer to PCB for this pmap */ 65 int ref_count; /* reference count */ 66 struct pmap_statistics stats; /* statistics */ 67 simple_lock_data_t lock; /* lock on pmap */ 68 } *pmap_t; 69 70 /* 71 * For each vm_page_t, there is a list of all currently valid virtual 72 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 73 */ 74 75 typedef struct pv_entry { 76 struct pv_entry *pv_next; /* next pv_entry */ 77 struct pmap *pv_pmap;/* if not NULL, pmap where mapping lies */ 78 vm_offset_t pv_va; /* virtual address for mapping */ 79 int pv_flags; /* flags */ 80 } *pv_entry_t; 81 82 #define PV_REF 0x00000001 /* Simulated phys ref bit */ 83 84 #define PHYS_TO_PV(phys_page) (&pv_table[((phys_page)>>PAGE_SHIFT)]) 85 86 /* ROUND_PAGE used before vm system is initialized */ 87 #define ROUND_PAGE(x) (((uint)(x) + PAGE_SIZE-1)& ~(PAGE_SIZE - 1)) 88 #define TRUNC_PAGE(x) ((uint)(x) & ~(PAGE_SIZE - 1)) 89 90 /* Mapping macros used when allocating SPT */ 91 #define MAPVIRT(ptr, count) \ 92 (vm_offset_t)ptr = virtual_avail; \ 93 virtual_avail += (count) * NBPG; 94 95 #define MAPPHYS(ptr, count, perm) \ 96 pmap_map(virtual_avail, avail_start, avail_start + \ 97 (count) * NBPG, perm); \ 98 (vm_offset_t)ptr = virtual_avail; \ 99 virtual_avail += (count) * NBPG; \ 100 avail_start += (count) * NBPG; 101 102 #ifdef _KERNEL 103 #define pa_index(pa) atop(pa) 104 #define pa_to_pvh(pa) (&pv_table[atop(pa)]) 105 106 extern struct pmap kernel_pmap_store; 107 108 #define pmap_kernel() (&kernel_pmap_store) 109 110 #endif /* _KERNEL */ 111 112 /* Routines that are best to define as macros */ 113 #define pmap_copy(a,b,c,d,e) /* Dont do anything */ 114 #define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */ 115 #define pmap_pageable(a,b,c,d) /* Dont do anything */ 116 #define pmap_collect(pmap) /* No need so far */ 117 #define pmap_reference(pmap) if(pmap) (pmap)->ref_count++ 118 #define pmap_pinit(pmap) (pmap)->ref_count=1; 119 #define pmap_phys_address(phys) ((u_int)(phys)<<PAGE_SHIFT) 120 121 /* Prototypes */ 122 void pmap_bootstrap __P((void)); 123 void pmap_expandp0 __P((struct pmap *, int)); 124 void pmap_expandp1 __P((struct pmap *)); 125 #endif PMAP_H 126