195 lines
5.3 KiB
C
195 lines
5.3 KiB
C
/* $NetBSD: uvm.h,v 1.52 2007/07/21 19:21:53 ad 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Charles D. Cranor and
|
|
* Washington University.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 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"
|
|
#endif
|
|
|
|
#include <uvm/uvm_extern.h>
|
|
|
|
#include <uvm/uvm_stat.h>
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* pull in VM_NFREELIST
|
|
*/
|
|
#include <machine/vmparam.h>
|
|
|
|
struct workqueue;
|
|
|
|
/*
|
|
* 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 */
|
|
int page_free_nextcolor; /* next color to allocate from */
|
|
struct simplelock pageqlock; /* lock for active/inactive page q */
|
|
bool page_init_done; /* TRUE if uvm_page_init() finished */
|
|
bool page_idle_zero; /* TRUE if we should try to zero
|
|
pages in the idle loop */
|
|
|
|
/* page daemon trigger */
|
|
int pagedaemon; /* daemon sleeps on this */
|
|
struct lwp *pagedaemon_lwp; /* daemon's lid */
|
|
|
|
/* aiodone daemon */
|
|
struct workqueue *aiodone_queue;
|
|
|
|
/* page hash */
|
|
struct pglist *page_hash; /* page hash table (vp/off->page) */
|
|
int page_nhash; /* number of buckets */
|
|
int page_hashmask; /* hash mask */
|
|
|
|
/* aio_done is locked by uvm.pagedaemon_lock and splbio! */
|
|
TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
|
|
|
|
/* swap-related items */
|
|
bool swap_running;
|
|
kcondvar_t scheduler_cv;
|
|
bool scheduler_kicked;
|
|
int swapout_enabled;
|
|
};
|
|
|
|
/*
|
|
* kernel object: to support anonymous pageable kernel memory
|
|
*/
|
|
extern struct uvm_object *uvm_kernel_object;
|
|
|
|
/*
|
|
* locks (made globals for lockstat).
|
|
*/
|
|
|
|
extern kmutex_t uvm_fpageqlock; /* lock for free page q */
|
|
extern kmutex_t uvm_pagedaemon_lock;
|
|
extern kmutex_t uvm_kentry_lock;
|
|
extern kmutex_t uvm_swap_data_lock;
|
|
extern kmutex_t uvm_scheduler_mutex;
|
|
|
|
#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) ltsleep(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_ */
|