198 lines
5.8 KiB
C
198 lines
5.8 KiB
C
/* $NetBSD: vmparam.h,v 1.43 2023/02/07 14:11:16 hgutch Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vmparam.h 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Machine dependent constants for Sun 4U and 4V UltraSPARC
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*/
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#ifndef VMPARAM_H
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#define VMPARAM_H
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#define __USE_TOPDOWN_VM
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/*
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* We use 8K VM pages on the Sun4U. Override the PAGE_* definitions
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* to be compile-time constants.
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*/
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#define PAGE_SHIFT 13
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (PAGE_SIZE - 1)
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/*
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* Default pager_map of 16MB is awfully small. There is plenty
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* of VA so use it.
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*/
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#define PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024)
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/*
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* Defaults for Unified Buffer Cache parameters.
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*/
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#ifndef UBC_WINSHIFT
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#define UBC_WINSHIFT 16 /* 64kB */
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#endif
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#ifndef UBC_NWINS
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#define UBC_NWINS 4096 /* 256MB */
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#endif
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/*
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* The kernel itself is mapped by the boot loader with 4Mb locked VM pages,
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* so let's keep 4Mb definitions here as well.
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*/
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#define PAGE_SHIFT_4M 22
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#define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M)
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#define PAGE_MASK_4M (PAGE_SIZE_4M-1)
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/*
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* USRSTACK is the top (end) of the user stack.
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*/
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#define USRSTACK32 0xffffe000L
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#ifdef __arch64__
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#define USRSTACK 0xffffffffffffe000L
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#else
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#define USRSTACK USRSTACK32
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#endif
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/*
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* Virtual memory related constants, all in bytes
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*/
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#if __arch64__
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/*
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* 64-bit limits:
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*
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* Since the compiler generates `call' instructions we can't
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* have more than 4GB in a single text segment.
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*
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* And since we only have a 40-bit adderss space, allow half
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* of that for data and the other half for stack.
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (4UL*1024*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1UL<<39) /* 512GB max data size */
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/*
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* For processes not using topdown VA, we need to limit the data size -
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* they probably have not been compiled with the proper compiler memory
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* model.
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*/
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#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
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round_page((vaddr_t)(da) + (vsize_t)uimax(maxdmap,1UL*1024*1024*1024))
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (128*1024*1024) /* max stack size */
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#endif
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#else
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/*
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* 32-bit limits:
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*
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* We only have 4GB to play with. Limit data, and text
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* each to half of that and set a reasonable stack limit.
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*
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (2UL*1024*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (128*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (2UL*1024*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (64*1024*1024) /* max stack size */
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#endif
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#endif
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/*
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* 32-bit emulation limits (same as sparc - we could go bigger)
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*/
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#ifndef DFLDSIZ32
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#define DFLDSIZ32 (64*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ32
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#define MAXDSIZ32 (512*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ32
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#define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ32
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#define MAXSSIZ32 (32*1024*1024) /* max stack size */
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#endif
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/*
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* Mach derived constants
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*/
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/*
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* User/kernel map constants.
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*/
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#define VM_MIN_ADDRESS ((vaddr_t)0)
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#define VM_MAX_ADDRESS (((vaddr_t)(-1))&~PGOFSET)
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#define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS
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#define VM_MAXUSER_ADDRESS32 ((vaddr_t)(0x00000000ffffffffL&~PGOFSET))
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE)
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#ifdef __arch64__
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#define VM_KERNEL_MEM_VA_START ((vaddr_t)0x100000000UL)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0x000007ffffffffffUL)
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#else
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND)
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#endif
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#define VM_PHYSSEG_MAX 32 /* up to 32 segments */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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#endif
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