167 lines
5.6 KiB
C
167 lines
5.6 KiB
C
/* $NetBSD: uvm_param.h,v 1.12 2001/08/05 03:33:16 matt 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. 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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* @(#)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
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#include <machine/vmparam.h>
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#endif
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/*
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* This belongs in types.h, but breaks too many existing programs.
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*/
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typedef int boolean_t;
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*
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* The machine independent pages are refered to as PAGES. A page
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* is some number of hardware pages, depending on the target machine.
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*/
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#define DEFAULT_PAGE_SIZE 4096
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#if defined(_KERNEL) && !defined(PAGE_SIZE)
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/*
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* All references to the size of a page should be done with PAGE_SIZE
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* or PAGE_SHIFT. The fact they are variables is hidden here so that
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* we can easily make them constant if we so desire.
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*/
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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 /* _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_VTEXTMIN 7
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#define VM_VNODEMIN 8
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#define VM_MAXSLP 9
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#define VM_USPACE 10
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#define VM_MAXID 11 /* 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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{ "vtextmin", CTLTYPE_INT }, \
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{ "vnodemin", CTLTYPE_INT }, \
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{ "maxslp", CTLTYPE_INT }, \
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{ "uspace", 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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extern psize_t mem_size; /* size of physical memory (bytes) */
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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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