source: rtems/cpukit/libnetworking/vm/vm_param.h @ 4bf1801

/*
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * The Mach Operating System project at Carnegie-Mellon University.
 *
 * 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: @(#)vm_param.h    8.1 (Berkeley) 6/11/93
 *
 *
 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 *
 * $Id$
 */

/*
 *      Machine independent virtual memory parameters.
 */

#ifndef _VM_PARAM_
#define _VM_PARAM_

#include <machine/vmparam.h>

/*
 *      The machine independent pages are refered to as PAGES.  A page
 *      is some number of hardware pages, depending on the target machine.
 */
#define DEFAULT_PAGE_SIZE       4096

#if 0

/*
 *      All references to the size of a page should be done with PAGE_SIZE
 *      or PAGE_SHIFT.  The fact they are variables is hidden here so that
 *      we can easily make them constant if we so desire.
 */
#ifndef PAGE_SIZE
#define PAGE_SIZE       cnt.v_page_size /* size of page */
#endif
#ifndef PAGE_MASK
#define PAGE_MASK       page_mask       /* size of page - 1 */
#endif
#ifndef PAGE_SHIFT
#define PAGE_SHIFT      page_shift      /* bits to shift for pages */
#endif

#endif

#ifdef KERNEL
extern vm_size_t page_mask;
extern int page_shift;

#endif

/*
 * CTL_VM identifiers
 */
#define VM_METER                1       /* struct vmmeter */
#define VM_LOADAVG              2       /* struct loadavg */
#define VM_V_FREE_MIN           3       /* cnt.v_free_min */
#define VM_V_FREE_TARGET        4       /* cnt.v_free_target */
#define VM_V_FREE_RESERVED      5       /* cnt.v_free_reserved */
#define VM_V_INACTIVE_TARGET    6       /* cnt.v_inactive_target */
#define VM_V_CACHE_MIN          7       /* cnt.v_cache_max */
#define VM_V_CACHE_MAX          8       /* cnt.v_cache_min */
#define VM_V_PAGEOUT_FREE_MIN   9       /* cnt.v_pageout_free_min */
#define VM_PAGEOUT_ALGORITHM    10      /* pageout algorithm */
#define VM_SWAPPING_ENABLED     11      /* swapping enabled */
#define VM_MAXID                12      /* number of valid vm ids */

#define CTL_VM_NAMES { \
        { 0, 0 }, \
        { "vmmeter", CTLTYPE_STRUCT }, \
        { "loadavg", CTLTYPE_STRUCT }, \
        { "v_free_min", CTLTYPE_INT }, \
        { "v_free_target", CTLTYPE_INT }, \
        { "v_free_reserved", CTLTYPE_INT }, \
        { "v_inactive_target", CTLTYPE_INT }, \
        { "v_cache_min", CTLTYPE_INT }, \
        { "v_cache_max", CTLTYPE_INT }, \
        { "v_pageout_free_min", CTLTYPE_INT}, \
        { "pageout_algorithm", CTLTYPE_INT}, \
        { "swapping_enabled", CTLTYPE_INT},\
}

/*
 *      Return values from the VM routines.
 */
#define KERN_SUCCESS            0
#define KERN_INVALID_ADDRESS    1
#define KERN_PROTECTION_FAILURE 2
#define KERN_NO_SPACE           3
#define KERN_INVALID_ARGUMENT   4
#define KERN_FAILURE            5
#define KERN_RESOURCE_SHORTAGE  6
#define KERN_NOT_RECEIVER       7
#define KERN_NO_ACCESS          8

#ifndef ASSEMBLER
/*
 *      Convert addresses to pages and vice versa.
 *      No rounding is used.
 */
#ifdef KERNEL
#define num_pages(x) \
        ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT))

extern vm_size_t mem_size;      /* size of physical memory (bytes) */
extern vm_offset_t first_addr;  /* first physical page */
extern vm_offset_t last_addr;   /* last physical page */
#endif                          /* KERNEL */
#endif                          /* ASSEMBLER */
#endif                          /* _VM_PARAM_ */