/* $OpenBSD: pmap.h,v 1.8 1998/03/01 12:09:02 maja Exp $ */ /* $NetBSD: pmap.h,v 1.19 1997/07/06 22:38:29 ragge Exp $ */ /* * Copyright (c) 1987 Carnegie-Mellon University * Copyright (c) 1991 Regents of the University of California. * All rights reserved. * * Changed for the VAX port. /IC * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)pmap.h 7.6 (Berkeley) 5/10/91 */ #ifndef PMAP_H #define PMAP_H #include #define VAX_PAGE_SIZE NBPG #define VAX_SEG_SIZE NBSEG /* * Pmap structure * * p0br == PR_P0BR in user struct, p0br is also == SBR in pmap_kernel() * p1br is the same for stack space, stack is base of alloced pte mem */ typedef struct pmap { vm_offset_t pm_stack; /* Base of alloced p1 pte space */ struct pcb *pm_pcb; /* Pointer to PCB for this pmap */ int ref_count; /* reference count */ struct pmap_statistics stats; /* statistics */ simple_lock_data_t pm_lock; /* lock on pmap */ } *pmap_t; /* * For each vm_page_t, there is a list of all currently valid virtual * mappings of that page. An entry is a pv_entry_t, the list is pv_table. */ typedef struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap;/* if not NULL, pmap where mapping lies */ vm_offset_t pv_va; /* virtual address for mapping */ int pv_flags; /* flags */ } *pv_entry_t; #define PV_REF 0x00000001 /* Simulated phys ref bit */ #define PHYS_TO_PV(phys_page) (&pv_table[((phys_page)>>PAGE_SHIFT)]) /* ROUND_PAGE used before vm system is initialized */ #define ROUND_PAGE(x) (((uint)(x) + PAGE_SIZE-1)& ~(PAGE_SIZE - 1)) #define TRUNC_PAGE(x) ((uint)(x) & ~(PAGE_SIZE - 1)) /* Mapping macros used when allocating SPT */ #define MAPVIRT(ptr, count) \ (vm_offset_t)ptr = virtual_avail; \ virtual_avail += (count) * NBPG; #define MAPPHYS(ptr, count, perm) \ pmap_map(virtual_avail, avail_start, avail_start + \ (count) * NBPG, perm); \ (vm_offset_t)ptr = virtual_avail; \ virtual_avail += (count) * NBPG; \ avail_start += (count) * NBPG; #ifdef _KERNEL #define pa_index(pa) atop(pa) #define pa_to_pvh(pa) (&pv_table[atop(pa)]) extern struct pmap kernel_pmap_store; #define pmap_kernel() (&kernel_pmap_store) #endif /* _KERNEL */ /* Routines that are best to define as macros */ #define pmap_copy(a,b,c,d,e) /* Dont do anything */ #define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */ #define pmap_pageable(a,b,c,d) /* Dont do anything */ #define pmap_collect(pmap) /* No need so far */ #define pmap_reference(pmap) if(pmap) (pmap)->ref_count++ #define pmap_pinit(pmap) (pmap)->ref_count=1; #define pmap_phys_address(phys) ((u_int)(phys)<