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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1987-1998,2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SUN4_VMPARAM_H
#define _SUN4_VMPARAM_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sun4/param.h>
/*
* Machine dependent constants for Sun-4
*/
/*
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack.
*/
#define USRTEXT 0x2000
#define USRSTACK KERNELBASE
/*
* Virtual memory related constants for UNIX resource control, all in bytes
* The default stack size of 8M allows an optimization of mmu mapping
* resources so that in normal use a single mmu region map entry (smeg)
* can be used to map both the stack and shared libraries
*/
#define DFLSSIZ (8*1024*1024) /* initial stack size limit */
#define DFLDSIZ_260 ((512*1024*1024)-USRTEXT) /* initial data size limit */
#define MAXDSIZ_260 ((512*1024*1024)-USRTEXT) /* max data size limit */
#define MAXSSIZ_260 ((512*1024*1024)-KERNELSIZE) /* max stack size limit */
#define DFLDSIZ_470 ((2048*1024*1024)-USRTEXT) /* initial data size limit */
#define MAXDSIZ_470 ((2048*1024*1024)-USRTEXT) /* max data size limit */
#define MAXSSIZ_470 ((2048*1024*1024)-KERNELSIZE) /* max stack size limit */
#define DFLDSIZ dfldsiz
#define MAXDSIZ maxdsiz
#define MAXSSIZ maxssiz
#ifndef LOCORE
extern unsigned int dfldsiz;
extern unsigned int maxdsiz;
extern unsigned int maxssiz;
#endif /* !LOCORE */
#define SSIZE 1 /* initial stack size */
#define SINCR 1 /* increment of stack */
/*
* Size of the kernel segkmem system pte table. This virtual
* space is controlled by the resource map "kernelmap".
*/
#define SYSPTSIZE (0x640000 / MMU_PAGESIZE)
/*
* Minimum allowable virtual address space to be used
* by the seg_map segment driver for fast kernel mappings.
*/
#define MINMAPSIZE 0x200000
/*
* 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 pages which are not
* paged anyways so this number just means a swapped in process is
* given around 32k bytes.
*/
#define SAFERSS 3
/*
* DISKRPM is used to estimate the number of paging i/o operations
* which one can expect from a single disk controller.
*/
#define DISKRPM 60
/*
* Paging thresholds (see vm_pageout.c).
* Strategy of 3/17/83:
* lotsfree is 256k bytes, but at most 1/8 of memory
* desfree is 100k bytes, but at most 1/16 of memory
* minfree is 32k bytes, but at most 1/2 of desfree
*/
#define LOTSFREE (256 * 1024)
#define LOTSFREEFRACT 8
#define DESFREE (100 * 1024)
#define DESFREEFRACT 16
#define MINFREE (32 * 1024)
#define MINFREEFRACT 2
/*
* 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)
/*
* Paged text files that are less than PGTHRESH bytes
* may be "prefaulted in" instead of demand paged.
*/
#define PGTHRESH (280 * 1024)
#ifdef __cplusplus
}
#endif
#endif /* !_SUN4_VMPARAM_H */
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