1 /* $OpenBSD: uvm.h,v 1.31 2009/04/28 16:06:07 miod Exp $ */ 2 /* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */ 3 4 /* 5 * 6 * Copyright (c) 1997 Charles D. Cranor and Washington University. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Charles D. Cranor and 20 * Washington University. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 36 */ 37 38 #ifndef _UVM_UVM_H_ 39 #define _UVM_UVM_H_ 40 41 #include <uvm/uvm_extern.h> 42 43 #include <uvm/uvm_stat.h> 44 45 /* 46 * pull in prototypes 47 */ 48 49 #include <uvm/uvm_amap.h> 50 #include <uvm/uvm_aobj.h> 51 #include <uvm/uvm_fault.h> 52 #include <uvm/uvm_glue.h> 53 #include <uvm/uvm_km.h> 54 #include <uvm/uvm_loan.h> 55 #include <uvm/uvm_map.h> 56 #include <uvm/uvm_object.h> 57 #include <uvm/uvm_page.h> 58 #include <uvm/uvm_pager.h> 59 #include <uvm/uvm_pdaemon.h> 60 #include <uvm/uvm_swap.h> 61 #ifdef UVM_SWAP_ENCRYPT 62 #include <uvm/uvm_swap_encrypt.h> 63 #endif 64 65 /* 66 * pull in VM_NFREELIST 67 */ 68 #include <machine/vmparam.h> 69 70 /* 71 * uvm structure (vm global state: collected in one structure for ease 72 * of reference...) 73 */ 74 75 struct uvm { 76 /* vm_page related parameters */ 77 78 /* vm_page queues */ 79 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 80 struct pglist page_active; /* allocated pages, in use */ 81 struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */ 82 struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */ 83 /* Lock order: object lock, pageqlock, then fpageqlock. */ 84 simple_lock_data_t pageqlock; /* lock for active/inactive page q */ 85 struct mutex fpageqlock; /* lock for free page q + pdaemon */ 86 boolean_t page_init_done; /* TRUE if uvm_page_init() finished */ 87 boolean_t page_idle_zero; /* TRUE if we should try to zero 88 pages in the idle loop */ 89 90 /* page daemon trigger */ 91 int pagedaemon; /* daemon sleeps on this */ 92 struct proc *pagedaemon_proc; /* daemon's pid */ 93 94 /* aiodone daemon trigger */ 95 int aiodoned; /* daemon sleeps on this */ 96 struct proc *aiodoned_proc; /* daemon's pid */ 97 struct mutex aiodoned_lock; 98 99 /* page hash */ 100 struct pglist *page_hash; /* page hash table (vp/off->page) */ 101 int page_nhash; /* number of buckets */ 102 int page_hashmask; /* hash mask */ 103 struct mutex hashlock; /* lock on page_hash array */ 104 105 /* static kernel map entry pool */ 106 vm_map_entry_t kentry_free; /* free page pool */ 107 simple_lock_data_t kentry_lock; 108 109 /* aio_done is locked by uvm.aiodoned_lock. */ 110 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 111 112 /* swap-related items */ 113 simple_lock_data_t swap_data_lock; 114 115 /* kernel object: to support anonymous pageable kernel memory */ 116 struct uvm_object *kernel_object; 117 }; 118 119 /* 120 * vm_map_entry etype bits: 121 */ 122 123 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 124 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 125 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 126 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 127 #define UVM_ET_HOLE 0x10 /* no backend */ 128 129 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 130 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 131 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 132 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 133 #define UVM_ET_ISHOLE(E) (((E)->etype & UVM_ET_HOLE) != 0) 134 135 #ifdef _KERNEL 136 137 /* 138 * holds all the internal UVM data 139 */ 140 extern struct uvm uvm; 141 142 /* 143 * historys 144 */ 145 #ifdef UVMHIST 146 extern UVMHIST_DECL(maphist); 147 extern UVMHIST_DECL(pdhist); 148 extern UVMHIST_DECL(pghist); 149 #endif 150 151 /* 152 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 153 * interlocked tsleep() function. 154 */ 155 156 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 157 do { \ 158 tsleep(event, PVM|PNORELOCK|(intr ? PCATCH : 0), msg, timo); \ 159 } while (0) 160 161 /* 162 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 163 */ 164 165 #if defined(UVM_PAGE_TRKOWN) 166 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 167 #else 168 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 169 #endif /* UVM_PAGE_TRKOWN */ 170 171 #endif /* _KERNEL */ 172 173 #endif /* _UVM_UVM_H_ */ 174