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/* $OpenBSD: vmparam.h,v 1.29 2008/06/24 21:24:03 deraadt Exp $ */
/* $NetBSD: vmparam.h,v 1.32 2000/03/07 00:05:59 matt Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Slightly modified for the VAX port /IC
*
* 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. 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.
*
* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
*/
#ifndef _VMPARAM_H_
#define _VMPARAM_H_
/*
* Machine dependent constants for VAX.
*/
/*
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack. Immediately above the user stack
* resides kernel.
*
*/
#define USRTEXT NBPG
#define USRSTACK KERNBASE
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (8*1024*1024) /* max text size */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (32*1024*1024) /* max data size */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (8*1024*1024) /* max stack size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (4*1024*1024) /* initial data size limit */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (512*1024) /* initial stack size limit */
#endif
#define STACKGAP_RANDOM 32*1024
#define BRKSIZ (8*1024*1024)
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 64 /* XXXX should be 1024 */
#endif
#define VM_PHYSSEG_MAX 1
#define VM_PHYSSEG_NOADD
#define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
/* MD round macros */
#define vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET)
#define vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET)
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE)
#define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000))
#define USRIOSIZE (8 * VAX_NPTEPG) /* 512MB */
#define VM_PHYS_SIZE (USRIOSIZE*VAX_NBPG)
/*
* This should be in <machine/pmap.h>, but needs to be in this file
* due to include ordering issues.
*/
#define __HAVE_VM_PAGE_MD
struct vm_page_md {
struct pv_entry *pv_head;
int pv_attr; /* write/modified bits */
};
#define VM_MDPAGE_INIT(pg) \
do { \
(pg)->mdpage.pv_head = NULL; \
(pg)->mdpage.pv_attr = 0; \
} while (0)
#endif
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