/* $NetBSD: vmparam.h,v 1.22 2021/02/26 01:48:20 simonb Exp $ */
/* $OpenBSD: vmparam.h,v 1.33 2006/06/04 17:21:24 miod Exp $ */
/*
* Copyright (c) 1988-1994, The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to
[email protected] any
* improvements that they make and grant CSL redistribution rights.
*
* Utah $Hdr: vmparam.h 1.16 94/12/16$
*/
#ifndef _HPPA_VMPARAM_H_
#define _HPPA_VMPARAM_H_
#define __USE_TOPDOWN_VM
/*
* Machine dependent constants for HP PA
*/
/*
* We use 4K pages on the HP PA. Override the PAGE_* definitions
* to be compile-time constants.
*/
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
/*
* USRSTACK is the bottom (start) of the user stack.
*/
#define USRSTACK (VM_MAXUSER_ADDRESS - MAXSSIZ) /* Start of user stack */
#define SYSCALLGATE 0xc0000000 /* syscall gateway page */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (16*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (USRSTACK-MAXTSIZ) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (256*1024*1024) /* max stack size */
#endif
#ifndef USRIOSIZE
#define USRIOSIZE ((2*HPPA_PGALIAS)/PAGE_SIZE) /* 2mb */
#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.
*/
/* XXXNH - remove??? */
#define MAXSLP 20
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAXUSER_ADDRESS ((vaddr_t)0xc0000000)
#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xc0001000)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xef000000)
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
#define VM_PHYSSEG_MAX 8 /* this many physmem segments */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
#define VM_NFREELIST 2
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_ISADMA 1
#endif /* _HPPA_VMPARAM_H_ */
