140 lines
4.8 KiB
C
140 lines
4.8 KiB
C
/* $NetBSD: vmparam.h,v 1.23 2000/05/06 05:19:32 nisimura Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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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 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 and Ralph Campbell.
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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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*
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* @(#)vmparam.h 8.2 (Berkeley) 4/22/94
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*/
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#ifndef _MIPS_VMPARAM_H_
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#define _MIPS_VMPARAM_H_
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/*
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* Machine dependent VM constants for MIPS.
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*/
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/*
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* USRTEXT is the start of the user text/data space, while USRSTACK
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* is the top (end) of the user stack.
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*
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* USRSTACK needs to start a little below 0x8000000 because the R8000
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* and some QED CPUs perform some virtual address checks before the
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* offset is calculated.
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*/
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#define USRTEXT 0x00001000 /* Start of user text */
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#define USRSTACK 0x7ffff000 /* Start of user stack */
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (24*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (32*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (256*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (32*1024*1024) /* 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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* 16 pte's are enough to cover 8 disks * MAXBSIZE.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE 32
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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 1024 /* 4mb */
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#endif
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/*
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* The time for a process to be blocked before being very swappable.
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* This is a number of seconds which the system takes as being a non-trivial
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* amount of real time. You probably shouldn't change this;
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* it is used in subtle ways (fractions and multiples of it are, that is, like
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* half of a ``long time'', almost a long time, etc.)
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* It is related to human patience and other factors which don't really
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* change over time.
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*/
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#define MAXSLP 20
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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 ((vaddr_t)0x00000000)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)0x80000000)
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#define VM_MAX_ADDRESS ((vaddr_t)0x80000000)
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000)
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#ifdef ENABLE_MIPS_TX3900
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFF000000)
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#else
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFC000)
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#endif
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
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/* VM_PHYSSEG_MAX defined by platform-dependent code. */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */
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/*
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* pmap-specific data stored in the vm_physmem[] array.
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*/
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struct pmap_physseg {
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struct pv_entry *pvent; /* pv table for this seg */
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char *attrs; /* page attributes for this seg */
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};
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#endif /* ! _MIPS_VMPARAM_H_ */
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