139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/* $NetBSD: vmparam.h,v 1.45 2001/11/15 18:06:14 soren Exp $ */
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/*-
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* Copyright (c) 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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* William Jolitz.
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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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* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
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*/
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#ifndef _VMPARAM_H_
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#define _VMPARAM_H_
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/*
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* Machine dependent constants for 386.
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*/
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/*
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* Page size on the IA-32 is not variable in the traditional sense.
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* We override the PAGE_* definitions to 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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* Virtual address space arrangement. On 386, both user and kernel
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* share the address space, not unlike the vax.
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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. Immediately above the user stack
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* resides the user structure, which is UPAGES long and contains the
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* kernel stack.
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*
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* Immediately after the user structure is the page table map, and then
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* kernal address space.
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*/
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#define USRTEXT NBPG
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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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#define MAXTSIZ (64*1024*1024) /* max text size */
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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 (1*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 (32*1024*1024) /* max stack size */
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#endif
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/*
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* Size of shared memory map
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 2048
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#endif
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/*
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* Size of User Raw I/O map
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*/
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#define USRIOSIZE 300
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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 \
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((vaddr_t)((PDSLOT_PTE << PDSHIFT) - (UPAGES * NBPG)))
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#define VM_MAX_ADDRESS \
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((vaddr_t)((PDSLOT_PTE << PDSHIFT) + (PDSLOT_PTE << PGSHIFT)))
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)(PDSLOT_KERN << PDSHIFT))
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(PDSLOT_APTE << PDSHIFT))
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/* XXX max. amount of KVM to be used by buffers. */
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#ifndef VM_MAX_KERNEL_BUF
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#define VM_MAX_KERNEL_BUF (384 * 1024 * 1024)
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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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#define VM_PHYSSEG_MAX 5 /* 1 "hole" + 4 free lists */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
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#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
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#define VM_NFREELIST 2
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_FIRST16 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_head *pvhead; /* pv_head array */
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char *attrs; /* attrs array */
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};
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#endif /* _VMPARAM_H_ */
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