83f108b04d
to the machine-independent parts of the VM. At the same time, this introduces vm object locking for the non-i386 platforms. Two details: 1. KSTACK_GUARD has been removed in favor of KSTACK_GUARD_PAGES. The different machine-dependent implementations used various combinations of KSTACK_GUARD and KSTACK_GUARD_PAGES. To disable guard page, set KSTACK_GUARD_PAGES to 0. 2. Remove the (unnecessary) clearing of PG_ZERO in vm_thread_new. In 5.x, (but not 4.x,) PG_ZERO can only be set if VM_ALLOC_ZERO is passed to vm_page_alloc() or vm_page_grab().
147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* William Jolitz.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)param.h 5.8 (Berkeley) 6/28/91
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Machine dependent constants for Intel 386.
|
|
*/
|
|
|
|
/*
|
|
* Round p (pointer or byte index) up to a correctly-aligned value
|
|
* for all data types (int, long, ...). The result is unsigned int
|
|
* and must be cast to any desired pointer type.
|
|
*/
|
|
#ifndef _ALIGNBYTES
|
|
#define _ALIGNBYTES (sizeof(int) - 1)
|
|
#endif
|
|
#ifndef _ALIGN
|
|
#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
|
|
#endif
|
|
|
|
#ifndef _MACHINE
|
|
#define _MACHINE i386
|
|
#endif
|
|
#ifndef _MACHINE_ARCH
|
|
#define _MACHINE_ARCH i386
|
|
#endif
|
|
|
|
#ifndef _NO_NAMESPACE_POLLUTION
|
|
|
|
#ifndef _MACHINE_PARAM_H_
|
|
#define _MACHINE_PARAM_H_
|
|
|
|
#ifndef MACHINE
|
|
#define MACHINE "i386"
|
|
#endif
|
|
#ifndef MACHINE_ARCH
|
|
#define MACHINE_ARCH "i386"
|
|
#endif
|
|
#define MID_MACHINE MID_I386
|
|
|
|
#ifdef SMP
|
|
#define MAXCPU 16
|
|
#else
|
|
#define MAXCPU 1
|
|
#endif /* SMP */
|
|
|
|
#define ALIGNBYTES _ALIGNBYTES
|
|
#define ALIGN(p) _ALIGN(p)
|
|
|
|
#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
|
|
#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
|
|
#define PAGE_MASK (PAGE_SIZE-1)
|
|
#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
|
|
|
|
#ifdef PAE
|
|
#define NPGPTD 4
|
|
#define PDRSHIFT 21 /* LOG2(NBPDR) */
|
|
#else
|
|
#define NPGPTD 1
|
|
#define PDRSHIFT 22 /* LOG2(NBPDR) */
|
|
#endif
|
|
|
|
#define NBPTD (NPGPTD<<PAGE_SHIFT)
|
|
#define NPDEPTD (NBPTD/(sizeof (pd_entry_t)))
|
|
#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
|
|
#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
|
|
#define PDRMASK (NBPDR-1)
|
|
|
|
#define IOPAGES 2 /* pages of i/o permission bitmap */
|
|
|
|
#ifndef KSTACK_PAGES
|
|
#define KSTACK_PAGES 2 /* Includes pcb! */
|
|
#endif
|
|
#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
|
|
#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */
|
|
|
|
/*
|
|
* Ceiling on amount of swblock kva space, can be changed via
|
|
* the kern.maxswzone /boot/loader.conf variable.
|
|
*/
|
|
#ifndef VM_SWZONE_SIZE_MAX
|
|
#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024)
|
|
#endif
|
|
|
|
/*
|
|
* Ceiling on size of buffer cache (really only effects write queueing,
|
|
* the VM page cache is not effected), can be changed via
|
|
* the kern.maxbcache /boot/loader.conf variable.
|
|
*/
|
|
#ifndef VM_BCACHE_SIZE_MAX
|
|
#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
|
|
#endif
|
|
|
|
/*
|
|
* Mach derived conversion macros
|
|
*/
|
|
#define trunc_page(x) ((x) & ~PAGE_MASK)
|
|
#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
|
|
#define trunc_4mpage(x) ((x) & ~PDRMASK)
|
|
#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK)
|
|
|
|
#define atop(x) ((x) >> PAGE_SHIFT)
|
|
#define ptoa(x) ((x) << PAGE_SHIFT)
|
|
|
|
#define i386_btop(x) ((x) >> PAGE_SHIFT)
|
|
#define i386_ptob(x) ((x) << PAGE_SHIFT)
|
|
|
|
#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
|
|
|
|
#endif /* !_MACHINE_PARAM_H_ */
|
|
#endif /* !_NO_NAMESPACE_POLLUTION */
|