125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
/* $NetBSD: vmparam3.h,v 1.26 1999/04/26 22:46:48 thorpej Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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* Copyright (c) 1993 Adam Glass
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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. 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, Berkeley and its contributors.
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* 4. 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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* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
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* from: @(#)vmparam.h 7.3 (Berkeley) 5/7/91
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* vmparam.h,v 1.2 1993/05/22 07:58:38 cgd Exp
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*/
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/*
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* Machine dependent constants for Sun3
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*
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* The Sun3 has limited total kernel virtual space (32MB) and
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* can not use main memory for page tables. (All active PTEs
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* must be installed in special translation RAM in the MMU).
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* Therefore, parameters that would normally configure the
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* size of various page tables are irrelevant. Only things
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* that consume portions of kernel virtual (KV) space matter,
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* and those things should be chosen to conserve KV space.
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*/
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/*
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* USRTEXT is the start of the user text/data space, while
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* USRSTACK is the top (end) of the user stack.
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*/
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#define USRTEXT NBPG /* Start of user text */
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#define USRSTACK KERNBASE /* High end of user stack */
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/*
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* Virtual memory related constants, all in bytes.
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* The Sun3 has only 224 MB of user-virtual space,
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* so we need to be conservative with these limits.
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (8*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (16*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (32*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (512*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ MAXDSIZ /* max stack size */
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#endif
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* The actual limitation for physio requests will be the DVMA space,
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* and that is fixed by hardware design at 1MB. We could make the
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* physio map larger than that, but it would not buy us much.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE 128 /* 1 MB */
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#endif
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/*
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* PTEs for system V style shared memory.
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* This is basically slop for kmempt which we actually allocate (malloc) from.
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 512 /* 4 MB */
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#endif
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/*
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* Mach-derived constants:
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*/
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS ((vm_offset_t)0)
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#define VM_MAX_ADDRESS ((vm_offset_t)KERNBASE)
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#define VM_MAXUSER_ADDRESS ((vm_offset_t)KERNBASE)
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNBASE)
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#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)KERN_END)
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_KMEM_SIZE (NKMEMCLUSTERS*CLBYTES)
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#define VM_PHYS_SIZE (USRIOSIZE*CLBYTES)
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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