1 /* $NetBSD: uvm.h,v 1.63 2012/02/02 19:43:08 tls Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 28 */ 29 30 #ifndef _UVM_UVM_H_ 31 #define _UVM_UVM_H_ 32 33 #if defined(_KERNEL_OPT) 34 #include "opt_lockdebug.h" 35 #include "opt_multiprocessor.h" 36 #include "opt_uvmhist.h" 37 #include "opt_uvm_page_trkown.h" 38 #endif 39 40 #include <uvm/uvm_extern.h> 41 42 #ifdef _KERNEL 43 #include <uvm/uvm_stat.h> 44 #endif 45 46 /* 47 * pull in prototypes 48 */ 49 50 #include <uvm/uvm_amap.h> 51 #include <uvm/uvm_aobj.h> 52 #include <uvm/uvm_fault.h> 53 #include <uvm/uvm_glue.h> 54 #include <uvm/uvm_km.h> 55 #include <uvm/uvm_loan.h> 56 #include <uvm/uvm_map.h> 57 #include <uvm/uvm_object.h> 58 #include <uvm/uvm_page.h> 59 #include <uvm/uvm_pager.h> 60 #include <uvm/uvm_pdaemon.h> 61 #include <uvm/uvm_swap.h> 62 #include <sys/rnd.h> 63 64 #ifdef _KERNEL 65 66 /* 67 * pull in VM_NFREELIST 68 */ 69 #include <machine/vmparam.h> 70 71 struct workqueue; 72 73 /* 74 * per-cpu data 75 */ 76 77 struct uvm_cpu { 78 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 79 int page_free_nextcolor; /* next color to allocate from */ 80 int page_idlezero_next; /* which color to zero next */ 81 bool page_idle_zero; /* TRUE if we should try to zero 82 pages in the idle loop */ 83 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 84 u_int emap_gen; /* emap generation number */ 85 86 uintptr_t last_fltaddr; /* last faulted address */ 87 uintptr_t last_delta; /* difference of last two flt addrs */ 88 uintptr_t last_delta2; /* difference of differences */ 89 krndsource_t rs; /* entropy source */ 90 }; 91 92 /* 93 * uvm structure (vm global state: collected in one structure for ease 94 * of reference...) 95 */ 96 97 struct uvm { 98 /* vm_page related parameters */ 99 100 /* vm_page queues */ 101 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 102 bool page_init_done; /* TRUE if uvm_page_init() finished */ 103 104 /* page daemon trigger */ 105 int pagedaemon; /* daemon sleeps on this */ 106 struct lwp *pagedaemon_lwp; /* daemon's lid */ 107 108 /* aiodone daemon */ 109 struct workqueue *aiodone_queue; 110 111 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 112 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 113 114 /* per-cpu data */ 115 struct uvm_cpu *cpus[MAXCPUS]; 116 }; 117 118 /* 119 * kernel object: to support anonymous pageable kernel memory 120 */ 121 extern struct uvm_object *uvm_kernel_object; 122 123 /* 124 * locks (made globals for lockstat). 125 */ 126 127 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ 128 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 129 extern kmutex_t uvm_kentry_lock; 130 extern kmutex_t uvm_swap_data_lock; 131 132 #endif /* _KERNEL */ 133 134 /* 135 * vm_map_entry etype bits: 136 */ 137 138 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 139 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 140 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 141 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 142 143 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 144 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 145 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 146 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 147 148 #ifdef _KERNEL 149 150 /* 151 * holds all the internal UVM data 152 */ 153 extern struct uvm uvm; 154 155 /* 156 * historys 157 */ 158 159 #ifdef UVMHIST 160 UVMHIST_DECL(maphist); 161 UVMHIST_DECL(pdhist); 162 UVMHIST_DECL(ubchist); 163 UVMHIST_DECL(loanhist); 164 #endif 165 166 extern struct evcnt uvm_ra_total; 167 extern struct evcnt uvm_ra_hit; 168 extern struct evcnt uvm_ra_miss; 169 170 /* 171 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 172 * interlocked tsleep() function. 173 */ 174 175 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 176 do { \ 177 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 178 msg, timo, slock); \ 179 } while (/*CONSTCOND*/ 0) 180 181 void uvm_kick_pdaemon(void); 182 183 /* 184 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 185 */ 186 187 #if defined(UVM_PAGE_TRKOWN) 188 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 189 #else 190 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 191 #endif /* UVM_PAGE_TRKOWN */ 192 193 #include <uvm/uvm_fault_i.h> 194 195 #endif /* _KERNEL */ 196 197 #endif /* _UVM_UVM_H_ */ 198