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/* $NetBSD: vmparam.h,v 1.42.18.1 2023/02/08 16:40:45 martin 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
*/
/*
* Machine dependent constants for Sun 4U and 4V UltraSPARC
*/
#ifndef VMPARAM_H
#define VMPARAM_H
#define __USE_TOPDOWN_VM
/*
* We use 8K VM pages on the Sun4U. Override the PAGE_* definitions
* to be compile-time constants.
*/
#define PAGE_SHIFT 13
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
/*
* Default pager_map of 16MB is awfully small. There is plenty
* of VA so use it.
*/
#define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024)
/*
* Defaults for Unified Buffer Cache parameters.
*/
#ifndef UBC_WINSHIFT
#define UBC_WINSHIFT 16 /* 64kB */
#endif
#ifndef UBC_NWINS
#define UBC_NWINS 4096 /* 256MB */
#endif
/*
* The kernel itself is mapped by the boot loader with 4Mb locked VM pages,
* so let's keep 4Mb definitions here as well.
*/
#define PAGE_SHIFT_4M 22
#define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M)
#define PAGE_MASK_4M (PAGE_SIZE_4M-1)
/*
* USRSTACK is the top (end) of the user stack.
*/
#define USRSTACK32 0xffffe000L
#ifdef __arch64__
#define USRSTACK 0xffffffffffffe000L
#else
#define USRSTACK USRSTACK32
#endif
/*
* Virtual memory related constants, all in bytes
*/
#if __arch64__
/*
* 64-bit limits:
*
* Since the compiler generates `call' instructions we can't
* have more than 4GB in a single text segment.
*
* And since we only have a 40-bit adderss space, allow half
* of that for data and the other half for stack.
*/
#ifndef MAXTSIZ
#define MAXTSIZ (4UL*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1UL<<39) /* 512GB max data size */
/*
* For processes not using topdown VA, we need to limit the data size -
* they probably have not been compiled with the proper compiler memory
* model.
*/
#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
round_page((vaddr_t)(da) + (vsize_t)uimax(maxdmap,1UL*1024*1024*1024))
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (128*1024*1024) /* max stack size */
#endif
#else
/*
* 32-bit limits:
*
* We only have 4GB to play with. Limit data, and text
* each to half of that and set a reasonable stack limit.
*
*/
#ifndef MAXTSIZ
#define MAXTSIZ (2UL*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (2UL*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (64*1024*1024) /* max stack size */
#endif
#endif
/*
* 32-bit emulation limits (same as sparc - we could go bigger)
*/
#ifndef DFLDSIZ32
#define DFLDSIZ32 (64*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ32
#define MAXDSIZ32 (512*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ32
#define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ32
#define MAXSSIZ32 (32*1024*1024) /* max stack size */
#endif
/*
* Mach derived constants
*/
/*
* User/kernel map constants.
*/
#define VM_MIN_ADDRESS ((vaddr_t)0)
#define VM_MAX_ADDRESS (((vaddr_t)(-1))&~PGOFSET)
#define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS
#define VM_MAXUSER_ADDRESS32 ((vaddr_t)(0x00000000ffffffffL&~PGOFSET))
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
#ifdef __arch64__
#define VM_KERNEL_MEM_VA_START ((vaddr_t)0x100000000UL)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0x000007ffffffffffUL)
#else
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND)
#endif
#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
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