257 lines
7.9 KiB
C
257 lines
7.9 KiB
C
/* $NetBSD: uvm_param.h,v 1.18 2003/08/07 16:34:50 agc Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. 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 Mach Operating System project at Carnegie-Mellon University.
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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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* @(#)vm_param.h 8.2 (Berkeley) 1/9/95
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*
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Authors: Avadis Tevanian, Jr., Michael Wayne Young
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Machine independent virtual memory parameters.
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*/
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#ifndef _VM_PARAM_
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#define _VM_PARAM_
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#ifdef _KERNEL_OPT
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#include "opt_uvm.h"
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#endif
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#ifdef _KERNEL
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#include <machine/vmparam.h>
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#endif
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#if defined(_KERNEL)
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#if defined(PAGE_SIZE)
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/*
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* If PAGE_SIZE is defined at this stage, it must be a constant.
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*/
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#if PAGE_SIZE == 0
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#error Invalid PAGE_SIZE definition
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#endif
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/*
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* If the platform does not need to support a variable PAGE_SIZE,
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* then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE.
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*/
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#if !defined(MIN_PAGE_SIZE)
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#define MIN_PAGE_SIZE PAGE_SIZE
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#endif /* ! MIN_PAGE_SIZE */
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#if !defined(MAX_PAGE_SIZE)
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#define MAX_PAGE_SIZE PAGE_SIZE
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#endif /* ! MAX_PAGE_SIZE */
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#else /* ! PAGE_SIZE */
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/*
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* PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must
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* be defined.
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*/
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#if !defined(MIN_PAGE_SIZE)
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#error MIN_PAGE_SIZE not defined
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#endif
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#if !defined(MAX_PAGE_SIZE)
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#error MAX_PAGE_SIZE not defined
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#endif
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#endif /* PAGE_SIZE */
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/*
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* MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants.
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*/
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#if MIN_PAGE_SIZE == 0
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#error Invalid MIN_PAGE_SIZE definition
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#endif
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#if MAX_PAGE_SIZE == 0
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#error Invalid MAX_PAGE_SIZE definition
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#endif
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/*
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* If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use
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* non-constant PAGE_SIZE, et al for LKMs.
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*/
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#if (MIN_PAGE_SIZE != MAX_PAGE_SIZE) && defined(_LKM)
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#undef PAGE_SIZE
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#undef PAGE_MASK
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#undef PAGE_SHIFT
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#endif
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/*
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* Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not
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* have ones that are compile-time constants.
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*/
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#if !defined(PAGE_SIZE)
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#define PAGE_SIZE uvmexp.pagesize /* size of page */
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#define PAGE_MASK uvmexp.pagemask /* size of page - 1 */
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#define PAGE_SHIFT uvmexp.pageshift /* bits to shift for pages */
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#endif /* PAGE_SIZE */
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#endif /* _KERNEL */
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/*
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* CTL_VM identifiers
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*/
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#define VM_METER 1 /* struct vmmeter */
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#define VM_LOADAVG 2 /* struct loadavg */
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#define VM_UVMEXP 3 /* struct uvmexp */
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#define VM_NKMEMPAGES 4 /* kmem_map pages */
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#define VM_UVMEXP2 5 /* struct uvmexp_sysctl */
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#define VM_ANONMIN 6
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#define VM_EXECMIN 7
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#define VM_FILEMIN 8
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#define VM_MAXSLP 9
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#define VM_USPACE 10
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#define VM_ANONMAX 11
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#define VM_EXECMAX 12
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#define VM_FILEMAX 13
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#define VM_MAXID 14 /* number of valid vm ids */
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#define CTL_VM_NAMES { \
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{ 0, 0 }, \
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{ "vmmeter", CTLTYPE_STRUCT }, \
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{ "loadavg", CTLTYPE_STRUCT }, \
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{ "uvmexp", CTLTYPE_STRUCT }, \
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{ "nkmempages", CTLTYPE_INT }, \
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{ "uvmexp2", CTLTYPE_STRUCT }, \
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{ "anonmin", CTLTYPE_INT }, \
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{ "execmin", CTLTYPE_INT }, \
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{ "filemin", CTLTYPE_INT }, \
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{ "maxslp", CTLTYPE_INT }, \
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{ "uspace", CTLTYPE_INT }, \
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{ "anonmax", CTLTYPE_INT }, \
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{ "execmax", CTLTYPE_INT }, \
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{ "filemax", CTLTYPE_INT }, \
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}
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#ifndef ASSEMBLER
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/*
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* Convert addresses to pages and vice versa.
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* No rounding is used.
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*/
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#ifdef _KERNEL
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#define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT)
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#define ptoa(x) ((vaddr_t)((vaddr_t)(x) << PAGE_SHIFT))
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/*
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* Round off or truncate to the nearest page. These will work
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* for either addresses or counts (i.e., 1 byte rounds to 1 page).
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*/
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#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
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#define trunc_page(x) ((x) & ~PAGE_MASK)
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/*
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* Set up the default mapping address (VM_DEFAULT_ADDRESS) according to:
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*
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* USE_TOPDOWN_VM: a kernel option to enable on a per-kernel basis
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* which only be used on ports that define...
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* __HAVE_TOPDOWN_VM: a per-port option to offer the topdown option
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*
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* __USE_TOPDOWN_VM: a per-port option to unconditionally use it
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*
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* if __USE_TOPDOWN_VM is defined, the port can specify a default vm
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* address, or we will use the topdown default from below. If it is
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* NOT defined, then the port can offer topdown as an option, but it
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* MUST define the VM_DEFAULT_ADDRESS macro itself.
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*/
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#if defined(USE_TOPDOWN_VM) || defined(__USE_TOPDOWN_VM)
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# if !defined(__HAVE_TOPDOWN_VM) && !defined(__USE_TOPDOWN_VM)
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# error "Top down memory allocation not enabled for this system"
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# else /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */
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# define __USING_TOPDOWN_VM
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# if !defined(VM_DEFAULT_ADDRESS)
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# if !defined(__USE_TOPDOWN_VM)
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# error "Top down memory allocation not configured for this system"
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# else /* !__USE_TOPDOWN_VM */
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# define VM_DEFAULT_ADDRESS(da, sz) \
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trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz))
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# endif /* !__USE_TOPDOWN_VM */
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# endif /* !VM_DEFAULT_ADDRESS */
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# endif /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */
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#endif /* USE_TOPDOWN_VM || __USE_TOPDOWN_VM */
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#if !defined(__USING_TOPDOWN_VM)
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# if defined(VM_DEFAULT_ADDRESS)
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# error "Default vm address should not be defined here"
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# else /* VM_DEFAULT_ADDRESS */
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# define VM_DEFAULT_ADDRESS(da, sz) round_page((vaddr_t)(da) + MAXDSIZ)
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# endif /* VM_DEFAULT_ADDRESS */
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#endif /* !__USING_TOPDOWN_VM */
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extern int ubc_nwins; /* number of UBC mapping windows */
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extern int ubc_winshift; /* shift for a UBC mapping window */
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#else
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/* out-of-kernel versions of round_page and trunc_page */
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#define round_page(x) \
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((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \
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vm_page_size)
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#define trunc_page(x) \
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((((vaddr_t)(x)) / vm_page_size) * vm_page_size)
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#endif /* _KERNEL */
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#endif /* ASSEMBLER */
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#endif /* _VM_PARAM_ */
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