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/* $OpenBSD: vmparam.h,v 1.20 2015/11/01 20:10:00 miod Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* machine dependent virtual memory parameters.
*/
#ifndef _MACHINE_VM_PARAM_
#define _MACHINE_VM_PARAM_
#define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (32*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (64*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (256*1024*1024) /* max data size */
#endif
#ifndef BRKSIZ
#define BRKSIZ MAXDSIZ /* heap gap size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
#define STACKGAP_RANDOM 256*1024
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 1024
#endif
#define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE)
#define VM_MAX_ADDRESS ((vaddr_t)0xfffff000)
#define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (1 * NPTEPG * PAGE_SIZE)
/*
* Constants which control the way the VM system deals with memory segments.
* All m88k systems so far only have one physical memory segment.
*/
#define VM_PHYSSEG_MAX 1
#define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
#define VM_PHYSSEG_NOADD
#endif /* _MACHINE_VM_PARAM_ */
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