| 1 | /* $NetBSD: uvm.h,v 1.66 2015/04/13 22:04:44 riastradh 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 | |
| 63 | #ifdef _KERNEL |
| 64 | |
| 65 | #include <sys/rndsource.h> |
| 66 | |
| 67 | /* |
| 68 | * pull in VM_NFREELIST |
| 69 | */ |
| 70 | #include <machine/vmparam.h> |
| 71 | |
| 72 | struct workqueue; |
| 73 | |
| 74 | /* |
| 75 | * per-cpu data |
| 76 | */ |
| 77 | |
| 78 | struct uvm_cpu { |
| 79 | struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ |
| 80 | int page_free_nextcolor; /* next color to allocate from */ |
| 81 | int page_idlezero_next; /* which color to zero next */ |
| 82 | bool page_idle_zero; /* TRUE if we should try to zero |
| 83 | pages in the idle loop */ |
| 84 | int pages[PGFL_NQUEUES]; /* total of pages in page_free */ |
| 85 | u_int emap_gen; /* emap generation number */ |
| 86 | |
| 87 | krndsource_t rs; /* entropy source */ |
| 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 | /* per-cpu data */ |
| 113 | struct uvm_cpu *cpus[MAXCPUS]; |
| 114 | }; |
| 115 | |
| 116 | /* |
| 117 | * kernel object: to support anonymous pageable kernel memory |
| 118 | */ |
| 119 | extern struct uvm_object *uvm_kernel_object; |
| 120 | |
| 121 | /* |
| 122 | * locks (made globals for lockstat). |
| 123 | */ |
| 124 | |
| 125 | extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ |
| 126 | extern kmutex_t uvm_fpageqlock; /* lock for free page q */ |
| 127 | extern kmutex_t uvm_kentry_lock; |
| 128 | extern kmutex_t uvm_swap_data_lock; |
| 129 | |
| 130 | #endif /* _KERNEL */ |
| 131 | |
| 132 | /* |
| 133 | * vm_map_entry etype bits: |
| 134 | */ |
| 135 | |
| 136 | #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ |
| 137 | #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ |
| 138 | #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ |
| 139 | #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ |
| 140 | |
| 141 | #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) |
| 142 | #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) |
| 143 | #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) |
| 144 | #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) |
| 145 | |
| 146 | #ifdef _KERNEL |
| 147 | |
| 148 | /* |
| 149 | * holds all the internal UVM data |
| 150 | */ |
| 151 | extern struct uvm uvm; |
| 152 | |
| 153 | /* |
| 154 | * historys |
| 155 | */ |
| 156 | |
| 157 | #ifdef UVMHIST |
| 158 | UVMHIST_DECL(maphist); |
| 159 | UVMHIST_DECL(pdhist); |
| 160 | UVMHIST_DECL(ubchist); |
| 161 | UVMHIST_DECL(loanhist); |
| 162 | #endif |
| 163 | |
| 164 | extern struct evcnt uvm_ra_total; |
| 165 | extern struct evcnt uvm_ra_hit; |
| 166 | extern struct evcnt uvm_ra_miss; |
| 167 | |
| 168 | /* |
| 169 | * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the |
| 170 | * interlocked tsleep() function. |
| 171 | */ |
| 172 | |
| 173 | #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ |
| 174 | do { \ |
| 175 | (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ |
| 176 | msg, timo, slock); \ |
| 177 | } while (/*CONSTCOND*/ 0) |
| 178 | |
| 179 | void uvm_kick_pdaemon(void); |
| 180 | |
| 181 | /* |
| 182 | * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) |
| 183 | */ |
| 184 | |
| 185 | #if defined(UVM_PAGE_TRKOWN) |
| 186 | #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) |
| 187 | #else |
| 188 | #define UVM_PAGE_OWN(PG, TAG) /* nothing */ |
| 189 | #endif /* UVM_PAGE_TRKOWN */ |
| 190 | |
| 191 | #include <uvm/uvm_fault_i.h> |
| 192 | |
| 193 | #endif /* _KERNEL */ |
| 194 | |
| 195 | #endif /* _UVM_UVM_H_ */ |
| 196 | |