uvm.h revision 1.2
1 /* $NetBSD: uvm.h,v 1.2 1998/02/06 22:31:29 thorpej Exp $ */ 2 3 /* 4 * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE! 5 * >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<< 6 */ 7 /* 8 * 9 * Copyright (c) 1997 Charles D. Cranor and Washington University. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Charles D. Cranor and 23 * Washington University. 24 * 4. The name of the author may not be used to endorse or promote products 25 * derived from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <uvm/uvm_extern.h> 40 41 #include <uvm/uvm_stat.h> 42 43 /* 44 * pull in prototypes 45 */ 46 47 #include <uvm/uvm_amap.h> 48 #include <uvm/uvm_aobj.h> 49 #include <uvm/uvm_fault.h> 50 #include <uvm/uvm_glue.h> 51 #include <uvm/uvm_km.h> 52 #include <uvm/uvm_loan.h> 53 #include <uvm/uvm_map.h> 54 #include <uvm/uvm_object.h> 55 #include <uvm/uvm_page.h> 56 #include <uvm/uvm_pager.h> 57 #include <uvm/uvm_pdaemon.h> 58 #include <uvm/uvm_swap.h> 59 60 /* 61 * uvm structure (vm global state: collected in one structure for ease 62 * of reference...) 63 */ 64 65 struct uvm { 66 /* vm_page related parameters */ 67 /* vm_page queues */ 68 struct pglist page_free; /* unallocated pages */ 69 struct pglist page_active; /* allocated pages, in use */ 70 struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */ 71 struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */ 72 #if NCPU > 1 73 simple_lock_data_t pageqlock; /* lock for active/inactive page q */ 74 simple_lock_data_t fpageqlock; /* lock for free page q */ 75 #endif /* NCPU > 1 */ 76 /* page daemon trigger */ 77 int pagedaemon; /* daemon sleeps on this */ 78 struct proc *pagedaemon_proc; /* daemon's pid */ 79 simple_lock_data_t pagedaemon_lock; 80 /* page hash */ 81 struct pglist *page_hash; /* page hash table (vp/off->page) */ 82 int page_nhash; /* number of buckets */ 83 int page_hashmask; /* hash mask */ 84 #if NCPU > 1 85 simple_lock_data_t hashlock; /* lock on page_hash array */ 86 #endif 87 /* anon stuff */ 88 struct vm_anon *afree; /* anon free list */ 89 #if NCPU > 1 90 simple_lock_data_t afreelock; /* lock on anon free list */ 91 #endif /* NCPU > 1 */ 92 93 /* static kernel map entry pool */ 94 vm_map_entry_t kentry_free; /* free page pool */ 95 #if NCPU > 1 96 simple_lock_data_t kentry_lock; 97 #endif 98 99 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 100 struct uvm_aiohead aio_done; /* done async i/o reqs */ 101 102 /* pager VM area bounds */ 103 vm_offset_t pager_sva; /* start of pager VA area */ 104 vm_offset_t pager_eva; /* end of pager VA area */ 105 106 /* kernel object: to support anonymous pageable kernel memory */ 107 struct uvm_object *kernel_object; 108 }; 109 110 extern struct uvm uvm; 111 112 /* 113 * vm_map_entry etype bits: 114 */ 115 116 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 117 #define UVM_ET_MAP 0x02 /* it is a vm_map */ 118 #define UVM_ET_SUBMAP 0x04 /* it is a submap (MAP must be 1 too) */ 119 #define UVM_ET_COPYONWRITE 0x08 /* copy_on_write */ 120 #define UVM_ET_NEEDSCOPY 0x10 /* needs_copy */ 121 122 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 123 #define UVM_ET_ISMAP(E) (((E)->etype & UVM_ET_MAP) != 0) 124 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 125 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 126 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 127 128 /* 129 * macros 130 */ 131 132 /* 133 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... front end for the 134 * (poorly named) thread_sleep_msg function. 135 */ 136 137 #if NCPU > 1 138 139 #define UVM_UNLOCK_AND_WAIT(event,lock,intr,msg, timo) \ 140 thread_sleep_msg(event,lock,intr,msg, timo) 141 142 #else 143 144 #define UVM_UNLOCK_AND_WAIT(event,lock,intr,msg, timo) \ 145 thread_sleep_msg(event,NULL,intr,msg, timo) 146 147 #endif 148 149 /* 150 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 151 */ 152 153 #if defined(UVM_PAGE_TRKOWN) 154 155 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 156 157 #else /* UVM_PAGE_TRKOWN */ 158 159 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 160 161 #endif /* UVM_PAGE_TRKOWN */ 162 163 /* 164 * pull in inlines 165 */ 166 167 #include <uvm/uvm_amap_i.h> 168 #include <uvm/uvm_fault_i.h> 169 #include <uvm/uvm_map_i.h> 170 #include <uvm/uvm_page_i.h> 171 #include <uvm/uvm_pager_i.h> 172
Indexes created Tue Sep 23 13:09:54 GMT 2025