1 /* $NetBSD: uvm.h,v 1.61 2011/02/02 17:53:42 chuck 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 #include <uvm/uvm_stat.h> 43 44 /* 45 * pull in prototypes 46 */ 47 48 #include <uvm/uvm_amap.h> 49 #include <uvm/uvm_aobj.h> 50 #include <uvm/uvm_fault.h> 51 #include <uvm/uvm_glue.h> 52 #include <uvm/uvm_km.h> 53 #include <uvm/uvm_loan.h> 54 #include <uvm/uvm_map.h> 55 #include <uvm/uvm_object.h> 56 #include <uvm/uvm_page.h> 57 #include <uvm/uvm_pager.h> 58 #include <uvm/uvm_pdaemon.h> 59 #include <uvm/uvm_swap.h> 60 61 #ifdef _KERNEL 62 63 /* 64 * pull in VM_NFREELIST 65 */ 66 #include <machine/vmparam.h> 67 68 struct workqueue; 69 70 /* 71 * per-cpu data 72 */ 73 74 struct uvm_cpu { 75 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 76 int page_free_nextcolor; /* next color to allocate from */ 77 int page_idlezero_next; /* which color to zero next */ 78 bool page_idle_zero; /* TRUE if we should try to zero 79 pages in the idle loop */ 80 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 81 u_int emap_gen; /* emap generation number */ 82 }; 83 84 /* 85 * uvm structure (vm global state: collected in one structure for ease 86 * of reference...) 87 */ 88 89 struct uvm { 90 /* vm_page related parameters */ 91 92 /* vm_page queues */ 93 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 94 bool page_init_done; /* TRUE if uvm_page_init() finished */ 95 96 /* page daemon trigger */ 97 int pagedaemon; /* daemon sleeps on this */ 98 struct lwp *pagedaemon_lwp; /* daemon's lid */ 99 100 /* aiodone daemon */ 101 struct workqueue *aiodone_queue; 102 103 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 104 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 105 106 /* per-cpu data */ 107 struct uvm_cpu *cpus[MAXCPUS]; 108 }; 109 110 /* 111 * kernel object: to support anonymous pageable kernel memory 112 */ 113 extern struct uvm_object *uvm_kernel_object; 114 115 /* 116 * locks (made globals for lockstat). 117 */ 118 119 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ 120 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 121 extern kmutex_t uvm_kentry_lock; 122 extern kmutex_t uvm_swap_data_lock; 123 124 #endif /* _KERNEL */ 125 126 /* 127 * vm_map_entry etype bits: 128 */ 129 130 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 131 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 132 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 133 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 134 135 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 136 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 137 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 138 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 139 140 #ifdef _KERNEL 141 142 /* 143 * holds all the internal UVM data 144 */ 145 extern struct uvm uvm; 146 147 /* 148 * historys 149 */ 150 151 #ifdef UVMHIST 152 UVMHIST_DECL(maphist); 153 UVMHIST_DECL(pdhist); 154 UVMHIST_DECL(ubchist); 155 UVMHIST_DECL(loanhist); 156 #endif 157 158 extern struct evcnt uvm_ra_total; 159 extern struct evcnt uvm_ra_hit; 160 extern struct evcnt uvm_ra_miss; 161 162 /* 163 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 164 * interlocked tsleep() function. 165 */ 166 167 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 168 do { \ 169 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 170 msg, timo, slock); \ 171 } while (/*CONSTCOND*/ 0) 172 173 void uvm_kick_pdaemon(void); 174 175 /* 176 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 177 */ 178 179 #if defined(UVM_PAGE_TRKOWN) 180 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 181 #else 182 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 183 #endif /* UVM_PAGE_TRKOWN */ 184 185 #include <uvm/uvm_fault_i.h> 186 187 #endif /* _KERNEL */ 188 189 #endif /* _UVM_UVM_H_ */ 190