LCOM1920-T02G10

/*        $NetBSD: uvm_param.h,v 1.35 2015/09/26 20:28:38 christos Exp $        */

/*

 * 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. 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.

 *

 *        @(#)vm_param.h        8.2 (Berkeley) 1/9/95

 *

 *

 * 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.

 */

/*

 *        Machine independent virtual memory parameters.

 */

#ifndef        _VM_PARAM_

#define        _VM_PARAM_

#ifdef _KERNEL_OPT

#include "opt_modular.h"

#include "opt_uvm.h"

#endif

#ifdef _KERNEL

#include <sys/types.h>

#include <machine/vmparam.h>

#include <sys/resourcevar.h>

#endif

#if defined(_KERNEL)

#if defined(PAGE_SIZE)

/*

 * If PAGE_SIZE is defined at this stage, it must be a constant.

 */

#if PAGE_SIZE == 0

#error Invalid PAGE_SIZE definition

#endif

/*

 * If the platform does not need to support a variable PAGE_SIZE,

 * then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE.

 */

#if !defined(MIN_PAGE_SIZE)

#define        MIN_PAGE_SIZE        PAGE_SIZE

#endif /* ! MIN_PAGE_SIZE */

#if !defined(MAX_PAGE_SIZE)

#define        MAX_PAGE_SIZE        PAGE_SIZE

#endif /* ! MAX_PAGE_SIZE */

#else /* ! PAGE_SIZE */

/*

 * PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must

 * be defined.

 */

#if !defined(MIN_PAGE_SIZE)

#error MIN_PAGE_SIZE not defined

#endif

#if !defined(MAX_PAGE_SIZE)

#error MAX_PAGE_SIZE not defined

#endif

#endif /* PAGE_SIZE */

/*

 * MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants.

 */

#if MIN_PAGE_SIZE == 0

#error Invalid MIN_PAGE_SIZE definition

#endif

#if MAX_PAGE_SIZE == 0

#error Invalid MAX_PAGE_SIZE definition

#endif

/*

 * If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use

 * non-constant PAGE_SIZE, et al for LKMs.

 */

#if (MIN_PAGE_SIZE != MAX_PAGE_SIZE)

#define        __uvmexp_pagesize

#if defined(_LKM) || defined(_MODULE)

#undef PAGE_SIZE

#undef PAGE_MASK

#undef PAGE_SHIFT

#endif

#endif

/*

 * Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not

 * have ones that are compile-time constants.

 */

#if !defined(PAGE_SIZE)

extern const int *const uvmexp_pagesize;

extern const int *const uvmexp_pagemask;

extern const int *const uvmexp_pageshift;

#define        PAGE_SIZE        (*uvmexp_pagesize)        /* size of page */

#define        PAGE_MASK        (*uvmexp_pagemask)        /* size of page - 1 */

#define        PAGE_SHIFT        (*uvmexp_pageshift)        /* bits to shift for pages */

#endif /* PAGE_SIZE */

#endif /* _KERNEL */

/*

 * CTL_VM identifiers

 */

#define        VM_METER        1                /* struct vmmeter */

#define        VM_LOADAVG        2                /* struct loadavg */

#define        VM_UVMEXP        3                /* struct uvmexp */

#define        VM_NKMEMPAGES        4                /* kmem_map pages */

#define        VM_UVMEXP2        5                /* struct uvmexp_sysctl */

#define        VM_ANONMIN        6

#define        VM_EXECMIN        7

#define        VM_FILEMIN        8

#define        VM_MAXSLP        9

#define        VM_USPACE        10

#define        VM_ANONMAX        11

#define        VM_EXECMAX        12

#define        VM_FILEMAX        13

#define        VM_MINADDRESS        14

#define        VM_MAXADDRESS        15

#define        VM_PROC                16                /* process information */

#define        VM_MAXID        17                /* number of valid vm ids */

#define VM_PROC_MAP        1                /* struct kinfo_vmentry */

#define        CTL_VM_NAMES { \

        { 0, 0 }, \

        { "vmmeter", CTLTYPE_STRUCT }, \

        { "loadavg", CTLTYPE_STRUCT }, \

        { "uvmexp", CTLTYPE_STRUCT }, \

        { "nkmempages", CTLTYPE_INT }, \

        { "uvmexp2", CTLTYPE_STRUCT }, \

        { "anonmin", CTLTYPE_INT }, \

        { "execmin", CTLTYPE_INT }, \

        { "filemin", CTLTYPE_INT }, \

        { "maxslp", CTLTYPE_INT }, \

        { "uspace", CTLTYPE_INT }, \

        { "anonmax", CTLTYPE_INT }, \

        { "execmax", CTLTYPE_INT }, \

        { "filemax", CTLTYPE_INT }, \

        { "minaddress", CTLTYPE_LONG }, \

        { "maxaddress", CTLTYPE_LONG }, \

        { "proc", CTLTYPE_STRUCT }, \

}

#ifndef ASSEMBLER

/*

 *        Convert addresses to pages and vice versa.

 *        No rounding is used.

 */

#ifdef _KERNEL

#define        atop(x)                (((paddr_t)(x)) >> PAGE_SHIFT)

#define        ptoa(x)                (((paddr_t)(x)) << PAGE_SHIFT)

/*

 * Round off or truncate to the nearest page.  These will work

 * for either addresses or counts (i.e., 1 byte rounds to 1 page).

 */

#define        round_page(x)        (((x) + PAGE_MASK) & ~PAGE_MASK)

#define        trunc_page(x)        ((x) & ~PAGE_MASK)

#ifndef VM_DEFAULT_ADDRESS_BOTTOMUP

#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \

    round_page((vaddr_t)(da) + (vsize_t)maxdmap)

#endif

#ifndef VM_DEFAULT_ADDRESS_TOPDOWN

#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \

    trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz))

#endif

extern int                ubc_nwins;        /* number of UBC mapping windows */

extern int                ubc_winshift;        /* shift for a UBC mapping window */

extern u_int                uvm_emap_size;        /* size of emap */

#else

/* out-of-kernel versions of round_page and trunc_page */

#if !defined(__minix)

#define        round_page(x) \

        ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \

            vm_page_size)

#define        trunc_page(x) \

        ((((vaddr_t)(x)) / vm_page_size) * vm_page_size)

#else

/* LSC: Minix always uses the same definition of those. */

#define        round_page(x)        (((x) + PAGE_MASK) & ~PAGE_MASK)

#define        trunc_page(x)        ((x) & ~PAGE_MASK)

#endif /* !defined(__minix) */

#endif /* _KERNEL */

/*

 * typedefs, necessary for standard UVM headers.

 */

typedef unsigned int uvm_flag_t;

typedef int vm_inherit_t;        /* XXX: inheritance codes */

typedef off_t voff_t;                /* XXX: offset within a uvm_object */

typedef voff_t pgoff_t;                /* XXX: number of pages within a uvm object */

#endif /* ASSEMBLER */

#endif /* _VM_PARAM_ */