/*	$OpenBSD: vmparam.h,v 1.20 2002/02/17 22:59:53 maja 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_

/*
 * USRTEXT is the start of the user text/data space, while USRSTACK
 * is the top (end) of the user stack.
 */
#define	USRTEXT		0x1000			/* Start of user text */
#define	USRSTACK	0x80000000		/* Start of user stack */

/*
 * 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

/*
 * Size of shared memory map
 */
#ifndef SHMMAXPGS
#define SHMMAXPGS	1024
#endif

/*
 * 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

#define	VM_MIN_ADDRESS		((vm_offset_t) 0)
#define	VM_MAX_ADDRESS		((vm_offset_t) 0xffc00000U)
#define VM_MAXUSER_ADDRESS	VM_MAX_ADDRESS

/* on vme188, max = 0xf0000000 */

#define VM_MIN_KERNEL_ADDRESS	((vm_offset_t) 0)
#define VM_MAX_KERNEL_ADDRESS	((vm_offset_t) 0x1fffffff)

#define KERNEL_STACK_SIZE	(3 * PAGE_SIZE)	/* kernel stack size */
#define INTSTACK_SIZE		(3 * PAGE_SIZE)	/* interrupt stack size */

/* 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.
 * The mvme88k only has one physical memory segment.
 */
#define	VM_PHYSSEG_MAX		1
#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
#define	VM_PHYSSEG_NOADD

#define VM_NFREELIST		1
#define VM_FREELIST_DEFAULT	0

#ifndef _LOCORE
/*
 * pmap-specific data stored in the vm_physmem[] array.
 */
#define __HAVE_PMAP_PHYSSEG
struct pmap_physseg {
	struct pv_entry *pvent;		/* pv table for this seg */
	char *attrs;			/* page modify list for this seg */
};
#endif /* _LOCORE */

#endif /* _MACHINE_VM_PARAM_ */