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7ab9b220d9
kernel opition 'options PAE'. This will only work with device drivers which either use busdma, or are able to handle 64 bit physical addresses. Thanks to Lanny Baron from FreeBSD Systems for the loan of a test machine with 6 gigs of ram. Sponsored by: DARPA, Network Associates Laboratories, FreeBSD Systems
148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/*-
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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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* from: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $FreeBSD$
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*/
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/*
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* Machine dependent constants for Intel 386.
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*/
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value
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* for all data types (int, long, ...). The result is unsigned int
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* and must be cast to any desired pointer type.
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*/
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#ifndef _ALIGNBYTES
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#define _ALIGNBYTES (sizeof(int) - 1)
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#endif
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#ifndef _ALIGN
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#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
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#endif
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#ifndef _MACHINE
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#define _MACHINE i386
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#endif
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#ifndef _MACHINE_ARCH
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#define _MACHINE_ARCH i386
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#endif
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#ifndef _NO_NAMESPACE_POLLUTION
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#ifndef _MACHINE_PARAM_H_
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#define _MACHINE_PARAM_H_
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#ifndef MACHINE
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#define MACHINE "i386"
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#endif
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#ifndef MACHINE_ARCH
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#define MACHINE_ARCH "i386"
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#endif
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#define MID_MACHINE MID_I386
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#ifdef SMP
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#define MAXCPU 16
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#else
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#define MAXCPU 1
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#endif /* SMP */
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#define ALIGNBYTES _ALIGNBYTES
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#define ALIGN(p) _ALIGN(p)
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#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
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#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
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#define PAGE_MASK (PAGE_SIZE-1)
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#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
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#ifdef PAE
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#define NPGPTD 4
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#define PDRSHIFT 21 /* LOG2(NBPDR) */
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#else
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#define NPGPTD 1
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#define PDRSHIFT 22 /* LOG2(NBPDR) */
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#endif
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#define NBPTD (NPGPTD<<PAGE_SHIFT)
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#define NPDEPTD (NBPTD/(sizeof (pd_entry_t)))
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#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
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#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
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#define PDRMASK (NBPDR-1)
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#define IOPAGES 2 /* pages of i/o permission bitmap */
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#ifndef KSTACK_PAGES
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#define KSTACK_PAGES 2 /* Includes pcb! */
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#endif
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#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */
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#define KSTACK_GUARD /* compile in the kstack guard page */
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/*
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* Ceiling on amount of swblock kva space, can be changed via
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* the kern.maxswzone /boot/loader.conf variable.
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*/
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#ifndef VM_SWZONE_SIZE_MAX
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#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
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#endif
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/*
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* Ceiling on size of buffer cache (really only effects write queueing,
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* the VM page cache is not effected), can be changed via
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* the kern.maxbcache /boot/loader.conf variable.
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*/
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#ifndef VM_BCACHE_SIZE_MAX
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#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
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#endif
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/*
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* Mach derived conversion macros
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*/
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#define trunc_page(x) ((x) & ~PAGE_MASK)
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#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
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#define trunc_4mpage(x) ((x) & ~PDRMASK)
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#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK)
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#define atop(x) ((x) >> PAGE_SHIFT)
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#define ptoa(x) ((x) << PAGE_SHIFT)
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#define i386_btop(x) ((x) >> PAGE_SHIFT)
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#define i386_ptob(x) ((x) << PAGE_SHIFT)
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#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
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#endif /* !_MACHINE_PARAM_H_ */
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#endif /* !_NO_NAMESPACE_POLLUTION */
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