162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/* $NetBSD: vm_param.h,v 1.10 1994/10/29 07:35:22 cgd 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 8.1 (Berkeley) 6/11/93
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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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#include <machine/vmparam.h>
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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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#define TRUE 1
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#define FALSE 0
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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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/*
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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 cnt.v_page_size /* size of page */
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#define PAGE_MASK page_mask /* size of page - 1 */
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#define PAGE_SHIFT page_shift /* bits to shift for pages */
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#ifdef KERNEL
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extern vm_size_t page_mask;
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extern int page_shift;
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#endif
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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_MAXID 3 /* 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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}
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/*
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* Return values from the VM routines.
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*/
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#define KERN_SUCCESS 0
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#define KERN_INVALID_ADDRESS 1
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#define KERN_PROTECTION_FAILURE 2
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#define KERN_NO_SPACE 3
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#define KERN_INVALID_ARGUMENT 4
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#define KERN_FAILURE 5
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#define KERN_RESOURCE_SHORTAGE 6
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#define KERN_NOT_RECEIVER 7
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#define KERN_NO_ACCESS 8
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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) (((unsigned long)(x)) >> PAGE_SHIFT)
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#define ptoa(x) ((vm_offset_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) \
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((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) & ~PAGE_MASK))
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#define trunc_page(x) \
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((vm_offset_t)(((vm_offset_t)(x)) & ~PAGE_MASK))
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#define num_pages(x) \
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((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))
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extern vm_size_t mem_size; /* size of physical memory (bytes) */
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extern vm_offset_t first_addr; /* first physical page */
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extern vm_offset_t last_addr; /* last physical page */
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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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((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size)
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#define trunc_page(x) \
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((((vm_offset_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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