LCOM1920-T02G10

/*        $NetBSD: uvm.h,v 1.66 2015/04/13 22:04:44 riastradh Exp $        */

/*

 * Copyright (c) 1997 Charles D. Cranor and Washington University.

 * All rights reserved.

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp

 */

#ifndef _UVM_UVM_H_

#define _UVM_UVM_H_

#if defined(_KERNEL_OPT)

#include "opt_lockdebug.h"

#include "opt_multiprocessor.h"

#include "opt_uvmhist.h"

#include "opt_uvm_page_trkown.h"

#endif

#include <uvm/uvm_extern.h>

#ifdef _KERNEL

#include <uvm/uvm_stat.h>

#endif

/*

 * pull in prototypes

 */

#include <uvm/uvm_amap.h>

#include <uvm/uvm_aobj.h>

#include <uvm/uvm_fault.h>

#include <uvm/uvm_glue.h>

#include <uvm/uvm_km.h>

#include <uvm/uvm_loan.h>

#include <uvm/uvm_map.h>

#include <uvm/uvm_object.h>

#include <uvm/uvm_page.h>

#include <uvm/uvm_pager.h>

#include <uvm/uvm_pdaemon.h>

#include <uvm/uvm_swap.h>

#ifdef _KERNEL

#include <sys/rndsource.h>

/*

 * pull in VM_NFREELIST

 */

#include <machine/vmparam.h>

struct workqueue;

/*

 * per-cpu data

 */

struct uvm_cpu {

        struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */

        int page_free_nextcolor;        /* next color to allocate from */

        int page_idlezero_next;                /* which color to zero next */

        bool page_idle_zero;                /* TRUE if we should try to zero

                                           pages in the idle loop */

        int pages[PGFL_NQUEUES];        /* total of pages in page_free */

        u_int emap_gen;                        /* emap generation number */

        krndsource_t rs;                /* entropy source */

};

/*

 * uvm structure (vm global state: collected in one structure for ease

 * of reference...)

 */

struct uvm {

        /* vm_page related parameters */

                /* vm_page queues */

        struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */

        bool page_init_done;                /* TRUE if uvm_page_init() finished */

                /* page daemon trigger */

        int pagedaemon;                        /* daemon sleeps on this */

        struct lwp *pagedaemon_lwp;        /* daemon's lid */

                /* aiodone daemon */

        struct workqueue *aiodone_queue;

        /* aio_done is locked by uvm.pagedaemon_lock and splbio! */

        TAILQ_HEAD(, buf) aio_done;                /* done async i/o reqs */

        /* per-cpu data */

        struct uvm_cpu *cpus[MAXCPUS];

};

/*

 * kernel object: to support anonymous pageable kernel memory

 */

extern struct uvm_object *uvm_kernel_object;

/*

 * locks (made globals for lockstat).

 */

extern kmutex_t uvm_pageqlock;                /* lock for active/inactive page q */

extern kmutex_t uvm_fpageqlock;                /* lock for free page q */

extern kmutex_t uvm_kentry_lock;

extern kmutex_t uvm_swap_data_lock;

#endif /* _KERNEL */

/*

 * vm_map_entry etype bits:

 */

#define UVM_ET_OBJ                0x01        /* it is a uvm_object */

#define UVM_ET_SUBMAP                0x02        /* it is a vm_map submap */

#define UVM_ET_COPYONWRITE         0x04        /* copy_on_write */

#define UVM_ET_NEEDSCOPY        0x08        /* needs_copy */

#define UVM_ET_ISOBJ(E)                (((E)->etype & UVM_ET_OBJ) != 0)

#define UVM_ET_ISSUBMAP(E)        (((E)->etype & UVM_ET_SUBMAP) != 0)

#define UVM_ET_ISCOPYONWRITE(E)        (((E)->etype & UVM_ET_COPYONWRITE) != 0)

#define UVM_ET_ISNEEDSCOPY(E)        (((E)->etype & UVM_ET_NEEDSCOPY) != 0)

#ifdef _KERNEL

/*

 * holds all the internal UVM data

 */

extern struct uvm uvm;

/*

 * historys

 */

#ifdef UVMHIST

UVMHIST_DECL(maphist);

UVMHIST_DECL(pdhist);

UVMHIST_DECL(ubchist);

UVMHIST_DECL(loanhist);

#endif

extern struct evcnt uvm_ra_total;

extern struct evcnt uvm_ra_hit;

extern struct evcnt uvm_ra_miss;

/*

 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the

 * interlocked tsleep() function.

 */

#define        UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo)                \

do {                                                                        \

        (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0),        \

            msg, timo, slock);                                                \

} while (/*CONSTCOND*/ 0)

void uvm_kick_pdaemon(void);

/*

 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)

 */

#if defined(UVM_PAGE_TRKOWN)

#define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)

#else

#define UVM_PAGE_OWN(PG, TAG) /* nothing */

#endif /* UVM_PAGE_TRKOWN */

#include <uvm/uvm_fault_i.h>

#endif /* _KERNEL */

#endif /* _UVM_UVM_H_ */