/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_VM_MACHPARAM_H
#define _SYS_VM_MACHPARAM_H

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Machine dependent constants for sun4u.
 */

/*
 * USRTEXT is the start of the user text/data space.
 */
#define USRTEXT         0x2000

/*
 * 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 MAXSSIZ         (0x7ffff000)    /* max stack size limit */
#define DFLSSIZ         (8*1024*1024)   /* initial stack size limit */

/*
 * Minimum allowable virtual address space to be used
 * by the seg_map segment driver for fast kernel mappings.
 */
#define MINMAPSIZE      0x200000

/*
 * The virtual address space to be used by the seg_map segment
 * driver for fast kernel mappings.
 *
 * Size is 1/8th of physmem at boot.
 */

#ifdef  _LP64
#define SEGMAPSIZE      (256L * 1024L * 1024L * 1024L)  /* 256G */
#else
#define SEGMAPSIZE      (256 * 1024 * 1024)             /* 256M */
#endif  /* _LP64 */

/*
 * Define the default virtual size and valid size range for the segkp segment.
 */
#ifdef  _LP64
#define SEGKPDEFSIZE    (2L * 1024L * 1024L * 1024L)            /*   2G */
#define SEGKPMAXSIZE    (24L * 1024L * 1024L * 1024L)           /*  24G */
#define SEGKPMINSIZE    (512L * 1024 * 1024L)                   /* 512M */
#else
#define SEGKPDEFSIZE    (512 * 1024 * 1024)
#define SEGKPMAXSIZE    (512 * 1024 * 1024)
#define SEGKPMINSIZE    (512 * 1024 * 1024)
#endif  /* _LP64 */

/*
 * Define minimum size for zio segment
 */
#define SEGZIOMINSIZE   (512L * 1024L * 1024L)                  /* 512M */
#define SEGZIOMAXSIZE   (512L * 1024L * 1024L * 1024L)          /* 512G */

/*
 * 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.
 */
/*
 * nominal ``small'' resident set size
 * protected against replacement
 */
#define SAFERSS         3

/*
 * DISKRPM is used to estimate the number of paging i/o operations
 * which one can expect from a single disk controller.
 *
 * XXX - The system doesn't account for multiple swap devices.
 */
#define DISKRPM         600

/*
 * The maximum value for handspreadpages which is the the distance
 * between the two clock hands in pages.
 */
#define MAXHANDSPREADPAGES      ((64 * 1024 * 1024) / PAGESIZE)

/*
 * Paged text files that are less than PGTHRESH bytes
 * may be "prefaulted in" instead of demand paged.
 */
#define PGTHRESH        (280 * 1024)

/*
 * Cacheable bit for 64 bit MXCC Stream Source registers
 */
#define BC_CACHE_SHIFT  36

/*
 * set type for 64 bit phys addr variables.  Needed at least for interface
 * with MXCC.
 */

#ifndef _ASM
typedef unsigned long long pa_t;
#endif

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_VM_MACHPARAM_H */