diff options
Diffstat (limited to 'sys/vm/vm_page.h')
| -rw-r--r-- | sys/vm/vm_page.h | 145 |
1 files changed, 79 insertions, 66 deletions
diff --git a/sys/vm/vm_page.h b/sys/vm/vm_page.h index 25d8d4f..140c527 100644 --- a/sys/vm/vm_page.h +++ b/sys/vm/vm_page.h @@ -1,4 +1,4 @@ -/* +/* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * @@ -40,17 +40,17 @@ * 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 + * + * 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 @@ -61,7 +61,7 @@ * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. * - * $Id: vm_page.h,v 1.9 1994/10/21 01:19:28 wollman Exp $ + * $Id: vm_page.h,v 1.10 1994/11/14 08:19:08 bde Exp $ */ /* @@ -99,21 +99,22 @@ TAILQ_HEAD(pglist, vm_page); struct vm_page { - TAILQ_ENTRY(vm_page) pageq; /* queue info for FIFO - * queue or free list (P) */ - TAILQ_ENTRY(vm_page) hashq; /* hash table links (O)*/ - TAILQ_ENTRY(vm_page) listq; /* pages in same object (O)*/ + TAILQ_ENTRY(vm_page) pageq; /* queue info for FIFO queue or free list (P) */ + TAILQ_ENTRY(vm_page) hashq; /* hash table links (O) */ + TAILQ_ENTRY(vm_page) listq; /* pages in same object (O) */ - vm_object_t object; /* which object am I in (O,P)*/ - vm_offset_t offset; /* offset into object (O,P) */ + vm_object_t object; /* which object am I in (O,P) */ + vm_offset_t offset; /* offset into object (O,P) */ + vm_offset_t phys_addr; /* physical address of page */ - u_short wire_count; /* wired down maps refs (P) */ - u_short flags; /* see below */ - short hold_count; /* page hold count */ - u_short act_count; /* page usage count */ - u_short busy; /* page busy count */ - - vm_offset_t phys_addr; /* physical address of page */ + u_short wire_count; /* wired down maps refs (P) */ + u_short flags; /* see below */ + short hold_count; /* page hold count */ + u_short act_count; /* page usage count */ + u_short bmapped; /* number of buffers mapped */ + u_short busy; /* page busy count */ + u_short valid; /* map of valid DEV_BSIZE chunks */ + u_short dirty; /* map of dirty DEV_BSIZE chunks */ }; /* @@ -123,7 +124,7 @@ struct vm_page { */ #define PG_INACTIVE 0x0001 /* page is in inactive list (P) */ #define PG_ACTIVE 0x0002 /* page is in active list (P) */ -#define PG_LAUNDRY 0x0004 /* page is being cleaned now (P)*/ +#define PG_LAUNDRY 0x0004 /* page is being cleaned now (P) */ #define PG_CLEAN 0x0008 /* page has not been modified */ #define PG_BUSY 0x0010 /* page is in transit (O) */ #define PG_WANTED 0x0020 /* someone is waiting for page (O) */ @@ -135,7 +136,7 @@ struct vm_page { #define PG_DIRTY 0x0800 /* client flag to set when dirty */ #define PG_REFERENCED 0x1000 /* page has been referenced */ #define PG_VMIO 0x2000 /* VMIO flag */ -#define PG_PAGEROWNED 0x4000 /* DEBUG: async paging op in progress */ +#define PG_CACHE 0x4000 /* On VMIO cache */ #define PG_FREE 0x8000 /* page is in free list */ #if VM_PAGE_DEBUG @@ -147,15 +148,15 @@ struct vm_page { (PG_ACTIVE | PG_INACTIVE))) \ panic("vm_page_check: not valid!"); \ } -#else /* VM_PAGE_DEBUG */ +#else /* VM_PAGE_DEBUG */ #define VM_PAGE_CHECK(mem) -#endif /* VM_PAGE_DEBUG */ +#endif /* VM_PAGE_DEBUG */ #ifdef KERNEL /* * Each pageable resident page falls into one of three lists: * - * free + * free * Available for allocation now. * inactive * Not referenced in any map, but still has an @@ -168,26 +169,21 @@ struct vm_page { * ordered, in LRU-like fashion. */ -extern -struct pglist vm_page_queue_free; /* memory free queue */ -extern -struct pglist vm_page_queue_active; /* active memory queue */ -extern -struct pglist vm_page_queue_inactive; /* inactive memory queue */ - -extern -vm_page_t vm_page_array; /* First resident page in table */ -extern -long first_page; /* first physical page number */ - /* ... represented in vm_page_array */ -extern -long last_page; /* last physical page number */ - /* ... represented in vm_page_array */ - /* [INCLUSIVE] */ -extern -vm_offset_t first_phys_addr; /* physical address for first_page */ -extern -vm_offset_t last_phys_addr; /* physical address for last_page */ +extern struct pglist vm_page_queue_free; /* memory free queue */ +extern struct pglist vm_page_queue_active; /* active memory queue */ +extern struct pglist vm_page_queue_inactive; /* inactive memory queue */ +extern struct pglist vm_page_queue_cache; /* cache memory queue */ + +extern vm_page_t vm_page_array; /* First resident page in table */ +extern long first_page; /* first physical page number */ + + /* ... represented in vm_page_array */ +extern long last_page; /* last physical page number */ + + /* ... represented in vm_page_array */ + /* [INCLUSIVE] */ +extern vm_offset_t first_phys_addr; /* physical address for first_page */ +extern vm_offset_t last_phys_addr; /* physical address for last_page */ #define VM_PAGE_TO_PHYS(entry) ((entry)->phys_addr) @@ -197,11 +193,8 @@ vm_offset_t last_phys_addr; /* physical address for last_page */ #define PHYS_TO_VM_PAGE(pa) \ (&vm_page_array[atop(pa) - first_page ]) -extern -simple_lock_data_t vm_page_queue_lock; /* lock on active and inactive - page queues */ -extern /* lock on free page queue */ -simple_lock_data_t vm_page_queue_free_lock; +extern simple_lock_data_t vm_page_queue_lock; /* lock on active and inactive page queues */ +extern simple_lock_data_t vm_page_queue_free_lock; /* lock on free page queue */ /* * Functions implemented as macros @@ -231,21 +224,41 @@ simple_lock_data_t vm_page_queue_free_lock; (mem)->wire_count = 0; \ (mem)->hold_count = 0; \ (mem)->act_count = 0; \ + (mem)->busy = 0; \ + (mem)->valid = 0; \ + (mem)->dirty = 0; \ + (mem)->bmapped = 0; \ } -void vm_page_activate __P((vm_page_t)); -vm_page_t vm_page_alloc __P((vm_object_t, vm_offset_t)); -void vm_page_copy __P((vm_page_t, vm_page_t)); -void vm_page_deactivate __P((vm_page_t)); -void vm_page_free __P((vm_page_t)); -void vm_page_insert __P((vm_page_t, vm_object_t, vm_offset_t)); -vm_page_t vm_page_lookup __P((vm_object_t, vm_offset_t)); -void vm_page_remove __P((vm_page_t)); -void vm_page_rename __P((vm_page_t, vm_object_t, vm_offset_t)); -vm_offset_t vm_page_startup __P((vm_offset_t, vm_offset_t, vm_offset_t)); -void vm_page_unwire __P((vm_page_t)); -void vm_page_wire __P((vm_page_t)); -boolean_t vm_page_zero_fill __P((vm_page_t)); +#if PAGE_SIZE == 4096 +#define VM_PAGE_BITS_ALL 0xff +#endif + +#if PAGE_SIZE == 8192 +#define VM_PAGE_BITS_ALL 0xffff +#endif + + +void vm_page_activate __P((vm_page_t)); +vm_page_t vm_page_alloc __P((vm_object_t, vm_offset_t, int)); +void vm_page_copy __P((vm_page_t, vm_page_t)); +void vm_page_deactivate __P((vm_page_t)); +void vm_page_free __P((vm_page_t)); +void vm_page_insert __P((vm_page_t, vm_object_t, vm_offset_t)); +vm_page_t vm_page_lookup __P((vm_object_t, vm_offset_t)); +void vm_page_remove __P((vm_page_t)); +void vm_page_rename __P((vm_page_t, vm_object_t, vm_offset_t)); +vm_offset_t vm_page_startup __P((vm_offset_t, vm_offset_t, vm_offset_t)); +void vm_page_unwire __P((vm_page_t)); +void vm_page_wire __P((vm_page_t)); +boolean_t vm_page_zero_fill __P((vm_page_t)); +void vm_page_set_dirty __P((vm_page_t, int, int)); +void vm_page_set_clean __P((vm_page_t, int, int)); +int vm_page_is_clean __P((vm_page_t, int, int)); +void vm_page_set_valid __P((vm_page_t, int, int)); +void vm_page_set_invalid __P((vm_page_t, int, int)); +int vm_page_is_valid __P((vm_page_t, int, int)); +void vm_page_test_dirty __P((vm_page_t)); /* @@ -268,13 +281,13 @@ static __inline void vm_page_unhold(vm_page_t mem) { #ifdef DIAGNOSTIC - if( --mem->hold_count < 0) + if (--mem->hold_count < 0) panic("vm_page_unhold: hold count < 0!!!"); #else --mem->hold_count; #endif } -#endif /* KERNEL */ +#endif /* KERNEL */ -#endif /* !_VM_PAGE_ */ +#endif /* !_VM_PAGE_ */ |
