145748Smckusick /* 263379Sbostic * Copyright (c) 1991, 1993 363379Sbostic * The Regents of the University of California. All rights reserved. 445748Smckusick * 545748Smckusick * This code is derived from software contributed to Berkeley by 645748Smckusick * The Mach Operating System project at Carnegie-Mellon University. 745748Smckusick * 848493Smckusick * %sccs.include.redist.c% 945748Smckusick * 10*68161Scgd * @(#)vm_object.h 8.4 (Berkeley) 01/09/95 1148493Smckusick * 1248493Smckusick * 1348493Smckusick * Copyright (c) 1987, 1990 Carnegie-Mellon University. 1448493Smckusick * All rights reserved. 1548493Smckusick * 1648493Smckusick * Authors: Avadis Tevanian, Jr., Michael Wayne Young 1748493Smckusick * 1848493Smckusick * Permission to use, copy, modify and distribute this software and 1948493Smckusick * its documentation is hereby granted, provided that both the copyright 2048493Smckusick * notice and this permission notice appear in all copies of the 2148493Smckusick * software, derivative works or modified versions, and any portions 2248493Smckusick * thereof, and that both notices appear in supporting documentation. 2348493Smckusick * 2448493Smckusick * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 2548493Smckusick * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 2648493Smckusick * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 2748493Smckusick * 2848493Smckusick * Carnegie Mellon requests users of this software to return to 2948493Smckusick * 3048493Smckusick * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 3148493Smckusick * School of Computer Science 3248493Smckusick * Carnegie Mellon University 3348493Smckusick * Pittsburgh PA 15213-3890 3448493Smckusick * 3548493Smckusick * any improvements or extensions that they make and grant Carnegie the 3648493Smckusick * rights to redistribute these changes. 3745748Smckusick */ 3845748Smckusick 3945748Smckusick /* 4045748Smckusick * Virtual memory object module definitions. 4145748Smckusick */ 4245748Smckusick 4345748Smckusick #ifndef _VM_OBJECT_ 4445748Smckusick #define _VM_OBJECT_ 4545748Smckusick 4665126Smckusick #include <vm/vm_page.h> 4745748Smckusick #include <vm/vm_pager.h> 4845748Smckusick 4945748Smckusick /* 5045748Smckusick * Types defined: 5145748Smckusick * 5245748Smckusick * vm_object_t Virtual memory object. 5345748Smckusick */ 5445748Smckusick 5545748Smckusick struct vm_object { 5665126Smckusick struct pglist memq; /* Resident memory */ 5765126Smckusick TAILQ_ENTRY(vm_object) object_list; /* list of all objects */ 5850916Smckusick u_short flags; /* see below */ 5950916Smckusick u_short paging_in_progress; /* Paging (in or out) so 6050916Smckusick don't collapse or destroy */ 6145748Smckusick simple_lock_data_t Lock; /* Synchronization */ 6245748Smckusick int ref_count; /* How many refs?? */ 6345748Smckusick vm_size_t size; /* Object size */ 6445748Smckusick int resident_page_count; 6545748Smckusick /* number of resident pages */ 6645748Smckusick struct vm_object *copy; /* Object that holds copies of 6745748Smckusick my changed pages */ 6845748Smckusick vm_pager_t pager; /* Where to get data */ 6945748Smckusick vm_offset_t paging_offset; /* Offset into paging space */ 7045748Smckusick struct vm_object *shadow; /* My shadow */ 7145748Smckusick vm_offset_t shadow_offset; /* Offset in shadow */ 7265126Smckusick TAILQ_ENTRY(vm_object) cached_list; /* for persistence */ 7345748Smckusick }; 7450916Smckusick /* 7550916Smckusick * Flags 7650916Smckusick */ 7750916Smckusick #define OBJ_CANPERSIST 0x0001 /* allow to persist */ 7850916Smckusick #define OBJ_INTERNAL 0x0002 /* internally created object */ 7950916Smckusick #define OBJ_ACTIVE 0x0004 /* used to mark active objects */ 8045748Smckusick 8165126Smckusick TAILQ_HEAD(vm_object_hash_head, vm_object_hash_entry); 8265126Smckusick 8345748Smckusick struct vm_object_hash_entry { 8465126Smckusick TAILQ_ENTRY(vm_object_hash_entry) hash_links; /* hash chain links */ 85*68161Scgd vm_object_t object; /* object represented */ 8645748Smckusick }; 8745748Smckusick 8845748Smckusick typedef struct vm_object_hash_entry *vm_object_hash_entry_t; 8945748Smckusick 9045748Smckusick #ifdef KERNEL 9165126Smckusick TAILQ_HEAD(object_q, vm_object); 9265126Smckusick 9365126Smckusick struct object_q vm_object_cached_list; /* list of objects persisting */ 9445748Smckusick int vm_object_cached; /* size of cached list */ 9545748Smckusick simple_lock_data_t vm_cache_lock; /* lock for object cache */ 9645748Smckusick 9765126Smckusick struct object_q vm_object_list; /* list of allocated objects */ 9845748Smckusick long vm_object_count; /* count of all objects */ 9945748Smckusick simple_lock_data_t vm_object_list_lock; 10045748Smckusick /* lock for object list and count */ 10145748Smckusick 10245748Smckusick vm_object_t kernel_object; /* the single kernel object */ 10345748Smckusick vm_object_t kmem_object; 10445748Smckusick 10545748Smckusick #define vm_object_cache_lock() simple_lock(&vm_cache_lock) 10645748Smckusick #define vm_object_cache_unlock() simple_unlock(&vm_cache_lock) 10760337Storek #endif /* KERNEL */ 10845748Smckusick 10945748Smckusick #define vm_object_lock_init(object) simple_lock_init(&(object)->Lock) 11045748Smckusick #define vm_object_lock(object) simple_lock(&(object)->Lock) 11145748Smckusick #define vm_object_unlock(object) simple_unlock(&(object)->Lock) 11245748Smckusick #define vm_object_lock_try(object) simple_lock_try(&(object)->Lock) 11345748Smckusick #define vm_object_sleep(event, object, interruptible) \ 114*68161Scgd thread_sleep((event), &(object)->Lock, (interruptible)) 11545748Smckusick 11653331Sbostic #ifdef KERNEL 11753331Sbostic vm_object_t vm_object_allocate __P((vm_size_t)); 11853331Sbostic void vm_object_cache_clear __P((void)); 11953331Sbostic void vm_object_cache_trim __P((void)); 12053331Sbostic boolean_t vm_object_coalesce __P((vm_object_t, vm_object_t, 12153331Sbostic vm_offset_t, vm_offset_t, vm_offset_t, vm_size_t)); 12253331Sbostic void vm_object_collapse __P((vm_object_t)); 12353331Sbostic void vm_object_copy __P((vm_object_t, vm_offset_t, vm_size_t, 12453331Sbostic vm_object_t *, vm_offset_t *, boolean_t *)); 12553331Sbostic void vm_object_deactivate_pages __P((vm_object_t)); 12653331Sbostic void vm_object_deallocate __P((vm_object_t)); 12753331Sbostic void vm_object_enter __P((vm_object_t, vm_pager_t)); 12853331Sbostic void vm_object_init __P((vm_size_t)); 12953331Sbostic vm_object_t vm_object_lookup __P((vm_pager_t)); 13065689Shibler boolean_t vm_object_page_clean __P((vm_object_t, 13165689Shibler vm_offset_t, vm_offset_t, boolean_t, boolean_t)); 13253331Sbostic void vm_object_page_remove __P((vm_object_t, 13353331Sbostic vm_offset_t, vm_offset_t)); 13453331Sbostic void vm_object_pmap_copy __P((vm_object_t, 13553331Sbostic vm_offset_t, vm_offset_t)); 13653331Sbostic void vm_object_pmap_remove __P((vm_object_t, 13753331Sbostic vm_offset_t, vm_offset_t)); 13853331Sbostic void vm_object_print __P((vm_object_t, boolean_t)); 13953331Sbostic void vm_object_reference __P((vm_object_t)); 14053331Sbostic void vm_object_remove __P((vm_pager_t)); 14153331Sbostic void vm_object_setpager __P((vm_object_t, 14253331Sbostic vm_pager_t, vm_offset_t, boolean_t)); 14353331Sbostic void vm_object_shadow __P((vm_object_t *, 14453331Sbostic vm_offset_t *, vm_size_t)); 14553331Sbostic void vm_object_terminate __P((vm_object_t)); 14653331Sbostic #endif 14760337Storek #endif /* _VM_OBJECT_ */ 148