128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* $NetBSD: vmparam.h,v 1.35 2023/01/06 10:28:28 tsutsui Exp $ */
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/*
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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. 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 7.3 (Berkeley) 5/7/91
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*
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* Machine dependent constants for atari
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*/
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/*
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* Use common m68k definitions to define PAGE_SIZE and related constants.
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*/
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#include <m68k/vmparam.h>
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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 USRSTACK VM_MAXUSER_ADDRESS
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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 (32*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 (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (256*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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* One page is enough to handle 16Mb of simultaneous raw IO operations.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE (1 * NPTEPG) /* 16mb */
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#endif
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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)0xFFF00000)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000)
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0)
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-(NPTEPG * PAGE_SIZE))
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/*
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* virtual sizes (bytes) for various kernel submaps
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*/
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#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
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/*
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* Our bootloader currently passes up to 2 segments (ST and TT ram).
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* On the other hand, Milan has four SIMM slots with 2 banks
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* so it could have upto 8 segments.
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*/
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#define VM_PHYSSEG_MAX (8)
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#define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM
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#define VM_NFREELIST 2
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_TTRAM VM_FREELIST_DEFAULT
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#define VM_FREELIST_STRAM 1
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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_header *pvheader; /* pv table for this seg */
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};
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/*
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* number of kernel PT pages (initial only, can grow dynamically)
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*/
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#define VM_KERNEL_PT_PAGES ((vsize_t)4)
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#endif /* !_MACHINE_VMPARAM_H_ */
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