142 lines
4.9 KiB
C
142 lines
4.9 KiB
C
/* $NetBSD: vmparam.h,v 1.2 2000/02/11 19:25:16 thorpej Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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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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* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
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*
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* @(#)vmparam.h 8.2 (Berkeley) 4/19/94
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*
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* USRTEXT is the start of the user text/data space, while USRSTACK
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* is the top (end) of the user stack.
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*/
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#define USRTEXT 8192
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#define USRSTACK VM_MAXUSER_ADDRESS
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (8*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (16*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (64*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (512*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ MAXDSIZ /* max stack size */
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#endif
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/*
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* Sizes of the system and user portions of the system page table.
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*/
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/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
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#define SYSPTSIZE (2 * NPTEPG) /* 8mb */
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#define USRPTSIZE (1 * NPTEPG) /* 4mb */
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* One page is enough to handle 4Mb of simultaneous raw IO operations.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE (1 * NPTEPG) /* 4mb */
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#endif
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/*
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* PTEs for system V style shared memory.
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* This is basically slop for kmempt which we actually allocate (malloc) from.
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 1024 /* 8mb */
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#endif
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/*
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* The time for a process to be blocked before being very swappable.
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* This is a number of seconds which the system takes as being a non-trivial
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* amount of real time. You probably shouldn't change this;
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* it is used in subtle ways (fractions and multiples of it are, that is, like
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* half of a ``long time'', almost a long time, etc.)
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* It is related to human patience and other factors which don't really
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* change over time.
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*/
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#define MAXSLP 20
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS ((vaddr_t)0)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFC0000)
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#define VM_MAX_ADDRESS ((vaddr_t)0xFFFC0000)
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG))
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES)
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#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
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/* # of kernel PT pages (initial only, can grow dynamically) */
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#define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
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/*
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* Constants which control the way the VM system deals with memory segments.
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* Only one physical contigous memory segment.
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*/
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#define VM_PHYSSEG_MAX 1
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_PHYSSEG_NOADD
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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/*
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* pmap-specific data stored in the vm_physmem[] array.
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*/
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struct pmap_physseg {
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struct pv_entry *pvent; /* pv table for this seg */
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char *attrs; /* page attributes for this seg */
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};
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#endif /* _MACHINE_VMPARAM_H_ */
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