276 lines
10 KiB
C
276 lines
10 KiB
C
/* $NetBSD: vmparam.h,v 1.8 1996/11/15 14:21:00 briggs Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1982, 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*/
|
|
/*-
|
|
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
|
|
* Michael L. Finch, Bradley A. Grantham, and
|
|
* Lawrence A. Kesteloot
|
|
* All rights reserved.
|
|
*
|
|
* 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 Alice Group.
|
|
* 4. The names of the Alice Group or any of its members may not be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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.
|
|
*
|
|
*/
|
|
/*
|
|
* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
|
|
*
|
|
* @(#)vmparam.h 7.3 (Berkeley) 5/7/91
|
|
*/
|
|
|
|
/*
|
|
* Machine dependent constants for mac68k -- mostly derived from hp300.
|
|
*/
|
|
|
|
/*
|
|
* USRTEXT is the start of the user text/data space, while USRSTACK
|
|
* is the top (end) of the user stack. LOWPAGES and HIGHPAGES are
|
|
* the number of pages from the beginning of the P0 region to the
|
|
* beginning of the text and from the beginning of the P1 region to the
|
|
* beginning of the stack respectively.
|
|
*
|
|
* NOTE: HP300 uses HIGHPAGES == (0x100000/NBPG) for HP/UX compatibility.
|
|
* Do we care? Obviously not at the moment.
|
|
*/
|
|
#define USRTEXT 8192
|
|
#define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */
|
|
#define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */
|
|
#define P1PAGES 0x100000
|
|
#define LOWPAGES 0
|
|
#define HIGHPAGES 3 /* UPAGES */
|
|
|
|
/*
|
|
* Virtual memory related constants, all in bytes
|
|
*/
|
|
#ifndef MAXTSIZ
|
|
#define MAXTSIZ (8*1024*1024) /* max text size */
|
|
#endif
|
|
#ifndef DFLDSIZ
|
|
#define DFLDSIZ (16*1024*1024) /* initial data size limit */
|
|
#endif
|
|
#ifndef MAXDSIZ
|
|
#define MAXDSIZ (64*1024*1024) /* max data size */
|
|
#endif
|
|
#ifndef DFLSSIZ
|
|
#define DFLSSIZ (512*1024) /* initial stack size limit */
|
|
#endif
|
|
#ifndef MAXSSIZ
|
|
#define MAXSSIZ MAXDSIZ /* max stack size */
|
|
#endif
|
|
|
|
/*
|
|
* Default sizes of swap allocation chunks (see dmap.h).
|
|
* The actual values may be changed in vminit() based on MAXDSIZ.
|
|
* With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024.
|
|
* DMMIN should be at least ctod(1) so that vtod() works.
|
|
* vminit() insures this.
|
|
*/
|
|
#define DMMIN 32 /* smallest swap allocation */
|
|
#define DMMAX 4096 /* largest potential swap allocation */
|
|
|
|
/*
|
|
* Sizes of the system and user portions of the system page table.
|
|
*/
|
|
/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
|
|
#define SYSPTSIZE (2 * NPTEPG) /* 8mb */
|
|
#define USRPTSIZE (1 * NPTEPG) /* 4mb */
|
|
|
|
/*
|
|
* PTEs for mapping user space into the kernel for phyio operations.
|
|
* One page is enough to handle 4Mb of simultaneous raw IO operations.
|
|
*/
|
|
#ifndef USRIOSIZE
|
|
#define USRIOSIZE (1 * NPTEPG) /* 4mb */
|
|
#endif
|
|
|
|
/*
|
|
* PTEs for system V style shared memory.
|
|
* This is basically slop for kmempt which we actually allocate (malloc) from.
|
|
*/
|
|
#ifndef SHMMAXPGS
|
|
#define SHMMAXPGS 1024 /* 4mb */
|
|
#endif
|
|
|
|
/*
|
|
* Boundary at which to place first MAPMEM segment if not explicitly
|
|
* specified. Should be a power of two. This allows some slop for
|
|
* the data segment to grow underneath the first mapped segment.
|
|
*/
|
|
#define MMSEG 0x200000
|
|
|
|
/*
|
|
* The size of the clock loop.
|
|
*/
|
|
#define LOOPPAGES (maxfree - firstfree)
|
|
|
|
/*
|
|
* The time for a process to be blocked before being very swappable.
|
|
* This is a number of seconds which the system takes as being a non-trivial
|
|
* amount of real time. You probably shouldn't change this;
|
|
* it is used in subtle ways (fractions and multiples of it are, that is, like
|
|
* half of a ``long time'', almost a long time, etc.)
|
|
* It is related to human patience and other factors which don't really
|
|
* change over time.
|
|
*/
|
|
#define MAXSLP 20
|
|
|
|
/*
|
|
* A swapped in process is given a small amount of core without being bothered
|
|
* by the page replacement algorithm. Basically this says that if you are
|
|
* swapped in you deserve some resources. We protect the last SAFERSS
|
|
* pages against paging and will just swap you out rather than paging you.
|
|
* Note that each process has at least UPAGES+CLSIZE pages which are not
|
|
* paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
|
|
* number just means a swapped in process is given around 25k bytes.
|
|
* Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
|
|
* so we loan each swapped in process memory worth 100$, or just admit
|
|
* that we don't consider it worthwhile and swap it out to disk which costs
|
|
* $30/mb or about $0.75.
|
|
*/
|
|
#define SAFERSS 4 /* nominal ``small'' resident set size
|
|
protected against replacement */
|
|
|
|
/*
|
|
* DISKRPM is used to estimate the number of paging i/o operations
|
|
* which one can expect from a single disk controller.
|
|
*/
|
|
#define DISKRPM 3600
|
|
|
|
/*
|
|
* Klustering constants. Klustering is the gathering
|
|
* of pages together for pagein/pageout, while clustering
|
|
* is the treatment of hardware page size as though it were
|
|
* larger than it really is.
|
|
*
|
|
* KLMAX gives maximum cluster size in CLSIZE page (cluster-page)
|
|
* units. Note that ctod(KLMAX*CLSIZE) must be <= DMMIN in dmap.h.
|
|
* ctob(KLMAX) should also be less than MAXPHYS (in vm_swp.c)
|
|
* unless you like "big push" panics.
|
|
*/
|
|
|
|
#define KLMAX (4/CLSIZE)
|
|
#define KLSEQL (2/CLSIZE) /* in klust if vadvise(VA_SEQL) */
|
|
#define KLIN (4/CLSIZE) /* default data/stack in klust */
|
|
#define KLTXT (4/CLSIZE) /* default text in klust */
|
|
#define KLOUT (4/CLSIZE)
|
|
|
|
/*
|
|
* KLSDIST is the advance or retard of the fifo reclaim for sequential
|
|
* processes data space.
|
|
*/
|
|
#define KLSDIST 3 /* klusters advance/retard for seq. fifo */
|
|
|
|
/*
|
|
* Paging thresholds (see vm_sched.c).
|
|
* Strategy of 1/19/85:
|
|
* lotsfree is 512k bytes, but at most 1/4 of memory
|
|
* desfree is 200k bytes, but at most 1/8 of memory
|
|
* Are these still valid in 1995?
|
|
*/
|
|
#define LOTSFREE (512 * 1024)
|
|
#define LOTSFREEFRACT 4
|
|
#define DESFREE (200 * 1024)
|
|
#define DESFREEFRACT 8
|
|
|
|
/*
|
|
* There are two clock hands, initially separated by HANDSPREAD bytes
|
|
* (but at most all of user memory). The amount of time to reclaim
|
|
* a page once the pageout process examines it increases with this
|
|
* distance and decreases as the scan rate rises.
|
|
*/
|
|
#define HANDSPREAD (2 * 1024 * 1024)
|
|
|
|
/*
|
|
* The number of times per second to recompute the desired paging rate
|
|
* and poke the pagedaemon.
|
|
*/
|
|
#define RATETOSCHEDPAGING 4
|
|
|
|
/*
|
|
* Believed threshold (in megabytes) for which interleaved
|
|
* swapping area is desirable.
|
|
*/
|
|
#define LOTSOFMEM 2
|
|
|
|
/*
|
|
* Mach derived constants
|
|
*/
|
|
|
|
/* user/kernel map constants */
|
|
#define VM_MIN_ADDRESS ((vm_offset_t)0)
|
|
#define VM_MAXUSER_ADDRESS ((vm_offset_t)(USRSTACK))
|
|
#define VM_MAX_ADDRESS ((vm_offset_t)(0-(UPAGES*NBPG)))
|
|
#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0)
|
|
#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)(0-NBPG))
|
|
|
|
/* virtual sizes (bytes) for various kernel submaps */
|
|
#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES)
|
|
#define VM_KMEM_SIZE (NKMEMCLUSTERS*CLBYTES)
|
|
#define VM_PHYS_SIZE (USRIOSIZE*CLBYTES)
|
|
|
|
#define MACHINE_NONCONTIG /* VM <=> pmap interface modifier */
|
|
|
|
/* # of kernel PT pages (initial only, can grow dynamically) */
|
|
#define VM_KERNEL_PT_PAGES ((vm_size_t)2) /* XXX: SYSPTSIZE */
|
|
|
|
/* pcb base */
|
|
#define pcbb(p) ((u_int)(p)->p_addr)
|