200 lines
7.5 KiB
C
200 lines
7.5 KiB
C
/* $NetBSD: vmparam.h,v 1.31 2001/11/15 18:06:14 soren Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 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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/*-
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* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
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* Michael L. Finch, Bradley A. Grantham, and
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* Lawrence A. Kesteloot
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* All rights reserved.
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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 Alice Group.
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* 4. The names of the Alice Group or any of its members may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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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 7.3 (Berkeley) 5/7/91
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*/
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#ifndef _MAC68K_VMPARAM_H_
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#define _MAC68K_VMPARAM_H_
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/*
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* Machine dependent constants for mac68k -- mostly derived from hp300.
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*/
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/*
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* We use 4K pages on the mac68k. Override the PAGE_* definitions
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* to be compile-time constants.
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*/
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#define PAGE_SHIFT 12
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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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* USRTEXT is the start of the user text/data space, while USRSTACK
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* is the top (end) of the user stack. LOWPAGES and HIGHPAGES are
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* the number of pages from the beginning of the P0 region to the
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* beginning of the text and from the beginning of the P1 region to the
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* beginning of the stack respectively.
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*
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* NOTE: HP300 uses HIGHPAGES == (0x100000/NBPG) for HP/UX compatibility.
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* Do we care? Obviously not at the moment.
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*/
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#define USRTEXT 8192
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#define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */
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#define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */
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#define P1PAGES 0x100000
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#define LOWPAGES 0
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#define HIGHPAGES 3 /* UPAGES */
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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 (8*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 (64*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 (32*1024*1024) /* max stack size */
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#endif
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/*
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* Sizes of the system and user portions of the system page table.
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*/
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/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
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#define SYSPTSIZE (2 * NPTEPG) /* 8mb */
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#define USRPTSIZE (1 * NPTEPG) /* 4mb */
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* One page is enough to handle 4Mb of simultaneous raw IO operations.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE (1 * NPTEPG) /* 4mb */
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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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* 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)0)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK))
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#define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*NBPG)))
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG))
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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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/* # of kernel PT pages (initial only, can grow dynamically) */
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#define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */
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/*
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* Constants which control the way the VM system deals with memory segments.
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* Most mac68k systems have only 1 physical memory segment, but some have 2.
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*
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* On the systems that have multiple segments, specifically the IIsi and
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* IIci, the optimal configuration is to put the higher-density SIMMs in
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* bank B. This is because the on-board video uses main memory in bank A
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* for the framebuffer, and a memory controller prevents access during
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* video refresh cycles. Even if both banks contain the same amount of
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* RAM, a minimum of ~320KB will be subtracted from the amount in bank A
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* for the framebuffer (if on-board video is in use).
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*/
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#define VM_PHYSSEG_MAX 2
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
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#define VM_PHYSSEG_NOADD
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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#define __HAVE_PMAP_PHYSSEG
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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 /* _MAC68K_VMPARAM_H_ */
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