1 /* $NetBSD: uvm.h,v 1.56 2009/06/28 15:18:50 rmind Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor and 19 * Washington University. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 35 */ 36 37 #ifndef _UVM_UVM_H_ 38 #define _UVM_UVM_H_ 39 40 #if defined(_KERNEL_OPT) 41 #include "opt_lockdebug.h" 42 #include "opt_multiprocessor.h" 43 #include "opt_uvmhist.h" 44 #endif 45 46 #include <uvm/uvm_extern.h> 47 48 #include <uvm/uvm_stat.h> 49 50 /* 51 * pull in prototypes 52 */ 53 54 #include <uvm/uvm_amap.h> 55 #include <uvm/uvm_aobj.h> 56 #include <uvm/uvm_fault.h> 57 #include <uvm/uvm_glue.h> 58 #include <uvm/uvm_km.h> 59 #include <uvm/uvm_loan.h> 60 #include <uvm/uvm_map.h> 61 #include <uvm/uvm_object.h> 62 #include <uvm/uvm_page.h> 63 #include <uvm/uvm_pager.h> 64 #include <uvm/uvm_pdaemon.h> 65 #include <uvm/uvm_swap.h> 66 67 #ifdef _KERNEL 68 69 /* 70 * pull in VM_NFREELIST 71 */ 72 #include <machine/vmparam.h> 73 74 struct workqueue; 75 76 /* 77 * per-cpu data 78 */ 79 80 struct uvm_cpu { 81 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 82 int page_free_nextcolor; /* next color to allocate from */ 83 int page_idlezero_next; /* which color to zero next */ 84 bool page_idle_zero; /* TRUE if we should try to zero 85 pages in the idle loop */ 86 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 87 u_int emap_gen; /* emap generation number */ 88 }; 89 90 /* 91 * uvm structure (vm global state: collected in one structure for ease 92 * of reference...) 93 */ 94 95 struct uvm { 96 /* vm_page related parameters */ 97 98 /* vm_page queues */ 99 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 100 bool page_init_done; /* TRUE if uvm_page_init() finished */ 101 102 /* page daemon trigger */ 103 int pagedaemon; /* daemon sleeps on this */ 104 struct lwp *pagedaemon_lwp; /* daemon's lid */ 105 106 /* aiodone daemon */ 107 struct workqueue *aiodone_queue; 108 109 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 110 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 111 112 /* swap-related items */ 113 bool swap_running; 114 kcondvar_t scheduler_cv; 115 bool scheduler_kicked; 116 int swapout_enabled; 117 118 /* per-cpu data */ 119 struct uvm_cpu cpus[MAXCPUS]; 120 }; 121 122 /* 123 * kernel object: to support anonymous pageable kernel memory 124 */ 125 extern struct uvm_object *uvm_kernel_object; 126 127 /* 128 * locks (made globals for lockstat). 129 */ 130 131 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ 132 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 133 extern kmutex_t uvm_kentry_lock; 134 extern kmutex_t uvm_swap_data_lock; 135 extern kmutex_t uvm_scheduler_mutex; 136 137 #endif /* _KERNEL */ 138 139 /* 140 * vm_map_entry etype bits: 141 */ 142 143 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 144 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 145 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 146 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 147 148 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 149 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 150 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 151 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 152 153 #ifdef _KERNEL 154 155 /* 156 * holds all the internal UVM data 157 */ 158 extern struct uvm uvm; 159 160 /* 161 * historys 162 */ 163 164 #ifdef UVMHIST 165 UVMHIST_DECL(maphist); 166 UVMHIST_DECL(pdhist); 167 UVMHIST_DECL(ubchist); 168 UVMHIST_DECL(loanhist); 169 #endif 170 171 extern struct evcnt uvm_ra_total; 172 extern struct evcnt uvm_ra_hit; 173 extern struct evcnt uvm_ra_miss; 174 175 /* 176 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 177 * interlocked tsleep() function. 178 */ 179 180 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 181 do { \ 182 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 183 msg, timo, slock); \ 184 } while (/*CONSTCOND*/ 0) 185 186 void uvm_kick_pdaemon(void); 187 188 /* 189 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 190 */ 191 192 #if defined(UVM_PAGE_TRKOWN) 193 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 194 #else 195 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 196 #endif /* UVM_PAGE_TRKOWN */ 197 198 #include <uvm/uvm_fault_i.h> 199 200 #endif /* _KERNEL */ 201 202 #endif /* _UVM_UVM_H_ */ 203