NetBSD/sys/arch/arm32/include/vmparam.h

/*	$NetBSD: vmparam.h,v 1.8 1998/06/02 20:32:18 mark Exp $	*/

/*
 * Copyright (c) 1988 The Regents of the University of California.
 * 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 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.
 */

#ifndef	_ARM32_VMPARAM_H_
#define	_ARM32_VMPARAM_H_

#define	USRTEXT		VM_MIN_ADDRESS
#define	USRSTACK	VM_MAXUSER_ADDRESS

/*
 * Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have
 * to change the compiler to not generate bl instructions
 */
#define	MAXTSIZ		(8*1024*1024)		/* max text size */
#ifndef	DFLDSIZ
#define	DFLDSIZ		(16*1024*1024)		/* initial data size limit */
#endif
#ifndef	MAXDSIZ
#define	MAXDSIZ		(256*1024*1024)		/* max data size */
#endif
#ifndef	DFLSSIZ
#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
#endif
#ifndef	MAXSSIZ
#define	MAXSSIZ		(8*1024*1024)		/* 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

/*
 * Mach derived constants
 */

/* Need to link some of these with some in param.h */
   
#define	VM_MIN_ADDRESS		((vm_offset_t)0x00001000)
#define	VM_MAXUSER_ADDRESS	((vm_offset_t)0xefc00000 - UPAGES * NBPG)
#define	VM_MAX_ADDRESS		((vm_offset_t)0xeffc0000)

#define	VM_MIN_KERNEL_ADDRESS	((vm_offset_t)0xf0000000)
#define	VM_MAXKERN_ADDRESS	((vm_offset_t)0xf3000000)
#define	VM_MAX_KERNEL_ADDRESS	((vm_offset_t)0xffffffff)

/*
 * Size of User Raw I/O map
 */

#define USRIOSIZE       300

/* XXX max. amount of KVM to be used by buffers. */
#ifndef VM_MAX_KERNEL_BUF
#define VM_MAX_KERNEL_BUF \
	((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE /*VM_MIN_KERNEL_ADDRESS*/) / 4)
#endif

/* 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)

/*
 * Make MACHINE_NEW_NONCONTIG the default unless overridden with
 * MACHINE_NONCONTIG.
 */
#if !defined(MACHINE_NONCONTIG)

#define MACHINE_NEW_NONCONTIG	/* VM <=> pmap interface modifier */

/*
 * max number of non-contig chunks of physical RAM you can have
 */

#define	VM_PHYSSEG_MAX		32

/*
 * when converting a physical address to a vm_page structure, we
 * want to use a binary search on the chunks of physical memory
 * to find our RAM
 */

#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH

/*
 * this indicates that we can't add RAM to the VM system after the
 * vm system is init'd.
 */

#define	VM_PHYSSEG_NOADD

/*
 * define structure pmap_physseg: there is one of these structures
 * for each chunk of noncontig RAM you have.
 */

struct pmap_physseg {
	struct pv_entry *pvent;		/* pv_entry array */
	char *attrs;			/* attrs array */
};

#endif	/* !MACHINE_NONCONTIG */
#endif	/* _ARM32_VMPARAM_H_ */

/* End of vmparam.h */