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/* $NetBSD: vmparam.h,v 1.48 2019/03/29 20:18:09 christos Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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, Lawrence Berkeley Laboratory.
*
* 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 8.1 (Berkeley) 6/11/93
*/
#ifndef _SPARC_VMPARAM_H_
#define _SPARC_VMPARAM_H_
#define __USE_TOPDOWN_VM
/*
* Machine dependent constants for SPARC
*/
#include <machine/cpuconf.h>
/*
* Sun4 systems have a 8K page size. All other platforms have a
* 4K page size. We need to define these upper and lower limits
* for machine-independent code. We also try to make PAGE_SIZE,
* PAGE_SHIFT, and PAGE_MASK into compile-time constants, if we can.
*
* XXX Should garbage-collect the version of this from <machine/param.h>.
*/
#define PAGE_SHIFT_SUN4 13
#define PAGE_SHIFT_SUN4CM 12
#define MAX_PAGE_SHIFT PAGE_SHIFT_SUN4
#define MIN_PAGE_SHIFT PAGE_SHIFT_SUN4CM
#define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT)
#define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT)
#if CPU_NTYPES != 0 && !defined(SUN4)
#define PAGE_SHIFT PAGE_SHIFT_SUN4CM
#elif CPU_NTYPES == 1 && defined(SUN4)
#define PAGE_SHIFT PAGE_SHIFT_SUN4
#endif
#ifdef PAGE_SHIFT
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
#endif
/*
* USRSTACK is the top (end) of the user stack.
*/
#define USRSTACK KERNBASE /* Start of user stack */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (64*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (64*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (512*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (8*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
/*
* Mach derived constants
*/
/*
* User/kernel map constants. Note that sparc/vaddrs.h defines the
* IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS:
* tread with care.
*/
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAX_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND)
#define VM_PHYSSEG_MAX 32 /* up to 32 segments */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
#endif /* _SPARC_VMPARAM_H_ */
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