/* $NetBSD: vmparam.h,v 1.31 2025/02/08 23:44:53 tsutsui Exp $ */
/*
* This file was taken from mvme68k/include/vmparam.h and
* should probably be re-synced when needed.
* Darrin B Jewell <
[email protected]> Fri Aug 28 03:22:07 1998
* original cvs id: NetBSD: vmparam.h,v 1.9 1998/08/22 10:55:34 scw Exp
*/
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
*
* @(#)vmparam.h 8.2 (Berkeley) 4/19/94
*/
#ifndef _NEXT68K_VMPARAM_H_
#define _NEXT68K_VMPARAM_H_
/*
* Machine dependent constants for NEXT68K
*/
/*
* Use common m68k definitions to define PAGE_SIZE and related constants.
*/
#include <m68k/vmparam.h>
/*
* USRSTACK is the top (end) of the user stack.
*/
#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 (16*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (64*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ MAXDSIZ /* max stack size */
#endif
/*
* PTEs for mapping user space into the kernel for phyio operations.
* One page is enough to handle 4Mb of simultaneous raw IO operations.
*/
#ifndef USRIOSIZE
#define USRIOSIZE (1 * NPTEPG) /* 4mb */
#endif
/*
* Mach derived constants
*/
/* user/kernel map constants */
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000)
#define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000)
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG))
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
/* # of kernel PT pages (initial only, can grow dynamically) */
#define VM_KERNEL_PT_PAGES ((vsize_t)2)
/*
* Constants which control the way the VM system deals with memory segments.
*/
#define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */
#define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
#define __HAVE_PMAP_PHYSSEG
/*
* pmap-specific data stored in the vm_physmem[] array.
*/
struct pmap_physseg {
struct pv_header *pvheader; /* pv table for this seg */
};
#endif /* _NEXT68K_VMPARAM_H_ */
