168 lines
6.1 KiB
C
168 lines
6.1 KiB
C
/*
|
|
* Copyright (c) 1991 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_object.h 7.3 (Berkeley) 4/21/91
|
|
* $Id: vm_object.h,v 1.5 1993/12/20 12:40:17 cgd Exp $
|
|
*
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _VM_VM_OBJECT_H_
|
|
#define _VM_VM_OBJECT_H_
|
|
|
|
/*
|
|
* Virtual memory object module definitions.
|
|
*/
|
|
|
|
#include <vm/vm_pager.h>
|
|
|
|
/*
|
|
* Types defined:
|
|
*
|
|
* vm_object_t Virtual memory object.
|
|
*/
|
|
|
|
struct vm_object {
|
|
queue_chain_t memq; /* Resident memory */
|
|
queue_chain_t object_list; /* list of all objects */
|
|
simple_lock_data_t Lock; /* Synchronization */
|
|
int ref_count; /* How many refs?? */
|
|
vm_size_t size; /* Object size */
|
|
int resident_page_count;
|
|
/* number of resident pages */
|
|
struct vm_object *copy; /* Object that holds copies of
|
|
my changed pages */
|
|
vm_pager_t pager; /* Where to get data */
|
|
vm_offset_t paging_offset; /* Offset into paging space */
|
|
struct vm_object *shadow; /* My shadow */
|
|
vm_offset_t shadow_offset; /* Offset in shadow */
|
|
u_short paging_in_progress;
|
|
/* Paging (in or out) - don't
|
|
collapse or destroy */
|
|
u_short flags; /* object flags; see below */
|
|
queue_chain_t cached_list; /* for persistence */
|
|
};
|
|
|
|
/* Object flags */
|
|
#define OBJ_CANPERSIST 0x0001 /* allow to persist */
|
|
#define OBJ_INTERNAL 0x0002 /* internally created object */
|
|
|
|
typedef struct vm_object *vm_object_t;
|
|
|
|
struct vm_object_hash_entry {
|
|
queue_chain_t hash_links; /* hash chain links */
|
|
vm_object_t object; /* object we represent */
|
|
};
|
|
|
|
typedef struct vm_object_hash_entry *vm_object_hash_entry_t;
|
|
|
|
#ifdef KERNEL
|
|
queue_head_t vm_object_cached_list; /* list of objects persisting */
|
|
int vm_object_cached; /* size of cached list */
|
|
simple_lock_data_t vm_cache_lock; /* lock for object cache */
|
|
|
|
queue_head_t vm_object_list; /* list of allocated objects */
|
|
long vm_object_count; /* count of all objects */
|
|
simple_lock_data_t vm_object_list_lock;
|
|
/* lock for object list and count */
|
|
|
|
vm_object_t kernel_object; /* the single kernel object */
|
|
vm_object_t kmem_object;
|
|
|
|
#define vm_object_cache_lock() simple_lock(&vm_cache_lock)
|
|
#define vm_object_cache_unlock() simple_unlock(&vm_cache_lock)
|
|
#endif /* KERNEL */
|
|
|
|
/*
|
|
* Declare procedures that operate on VM objects.
|
|
*/
|
|
|
|
void vm_object_init ();
|
|
void vm_object_terminate();
|
|
vm_object_t vm_object_allocate();
|
|
void vm_object_reference();
|
|
void vm_object_deallocate();
|
|
void vm_object_pmap_copy();
|
|
void vm_object_pmap_remove();
|
|
void vm_object_page_remove();
|
|
void vm_object_shadow();
|
|
void vm_object_copy();
|
|
void vm_object_collapse();
|
|
vm_object_t vm_object_lookup();
|
|
void vm_object_enter();
|
|
void vm_object_setpager();
|
|
#define vm_object_cache(pager) pager_cache(vm_object_lookup(pager),TRUE)
|
|
#define vm_object_uncache(pager) pager_cache(vm_object_lookup(pager),FALSE)
|
|
|
|
void vm_object_cache_clear();
|
|
void vm_object_print();
|
|
|
|
#define vm_object_lock_init(object) \
|
|
simple_lock_init(&(object)->Lock)
|
|
#define vm_object_lock(object) \
|
|
simple_lock(&(object)->Lock)
|
|
#define vm_object_unlock(object) \
|
|
simple_unlock(&(object)->Lock)
|
|
#define vm_object_lock_try(object) \
|
|
simple_lock_try(&(object)->Lock)
|
|
#define vm_object_sleep(event, object, interruptible) \
|
|
thread_sleep((event), &(object)->Lock, (interruptible))
|
|
|
|
#endif /* !_VM_VM_OBJECT_H_ */
|