126 lines
4.6 KiB
C
126 lines
4.6 KiB
C
/* $NetBSD: pmap.h,v 1.17 1996/07/20 17:58:22 ragge Exp $ */
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/*
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* Copyright (c) 1987 Carnegie-Mellon University
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* Copyright (c) 1991 Regents of the University of California.
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* All rights reserved.
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*
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* Changed for the VAX port. /IC
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)pmap.h 7.6 (Berkeley) 5/10/91
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*/
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#ifndef PMAP_H
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#define PMAP_H
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#include <machine/mtpr.h>
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#define VAX_PAGE_SIZE NBPG
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#define VAX_SEG_SIZE NBSEG
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/*
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* Pmap structure
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*
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* p0br == PR_P0BR in user struct, p0br is also == SBR in pmap_kernel()
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* p1br is the same for stack space, stack is base of alloced pte mem
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*/
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typedef struct pmap {
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vm_offset_t pm_stack; /* Base of alloced p1 pte space */
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struct pcb *pm_pcb; /* Pointer to PCB for this pmap */
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int ref_count; /* reference count */
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struct pmap_statistics stats; /* statistics */
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simple_lock_data_t lock; /* lock on pmap */
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} *pmap_t;
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/*
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* For each vm_page_t, there is a list of all currently valid virtual
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* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
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*/
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typedef struct pv_entry {
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struct pv_entry *pv_next; /* next pv_entry */
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struct pmap *pv_pmap;/* if not NULL, pmap where mapping lies */
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vm_offset_t pv_va; /* virtual address for mapping */
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int pv_flags; /* flags */
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} *pv_entry_t;
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#define PV_REF 0x00000001 /* Simulated phys ref bit */
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#define PHYS_TO_PV(phys_page) (&pv_table[((phys_page)>>PAGE_SHIFT)])
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/* ROUND_PAGE used before vm system is initialized */
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#define ROUND_PAGE(x) (((uint)(x) + PAGE_SIZE-1)& ~(PAGE_SIZE - 1))
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#define TRUNC_PAGE(x) ((uint)(x) & ~(PAGE_SIZE - 1))
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/* Mapping macros used when allocating SPT */
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#define MAPVIRT(ptr, count) \
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(vm_offset_t)ptr = virtual_avail; \
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virtual_avail += (count) * NBPG;
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#define MAPPHYS(ptr, count, perm) \
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pmap_map(virtual_avail, avail_start, avail_start + \
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(count) * NBPG, perm); \
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(vm_offset_t)ptr = virtual_avail; \
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virtual_avail += (count) * NBPG; \
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avail_start += (count) * NBPG;
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#ifdef _KERNEL
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#define pa_index(pa) atop(pa)
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#define pa_to_pvh(pa) (&pv_table[atop(pa)])
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extern struct pmap kernel_pmap_store;
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#define pmap_kernel() (&kernel_pmap_store)
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#endif /* _KERNEL */
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/* Routines that are best to define as macros */
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#define pmap_copy(a,b,c,d,e) /* Dont do anything */
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#define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */
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#define pmap_pageable(a,b,c,d) /* Dont do anything */
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#define pmap_collect(pmap) /* No need so far */
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#define pmap_reference(pmap) if(pmap) (pmap)->ref_count++
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#define pmap_pinit(pmap) (pmap)->ref_count=1;
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#define pmap_phys_address(phys) ((u_int)(phys)<<PAGE_SHIFT)
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/* Prototypes */
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void pmap_bootstrap __P((void));
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void pmap_expandp0 __P((struct pmap *, int));
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void pmap_expandp1 __P((struct pmap *));
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#endif PMAP_H
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