1 /* $OpenBSD: uvm.h,v 1.61 2016/08/11 01:17:33 dlg Exp $ */ 2 /* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */ 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 29 */ 30 31 #ifndef _UVM_UVM_H_ 32 #define _UVM_UVM_H_ 33 34 #include <uvm/uvm_extern.h> 35 #include <uvm/uvm_amap.h> 36 #include <uvm/uvm_aobj.h> 37 #include <uvm/uvm_fault.h> 38 #include <uvm/uvm_glue.h> 39 #include <uvm/uvm_km.h> 40 #include <uvm/uvm_swap.h> 41 42 #include <uvm/uvm_pmemrange.h> 43 44 /* 45 * uvm structure (vm global state: collected in one structure for ease 46 * of reference...) 47 */ 48 49 struct uvm { 50 /* vm_page related parameters */ 51 52 /* vm_page queues */ 53 struct pglist page_active; /* allocated pages, in use */ 54 struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */ 55 struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */ 56 /* Lock order: pageqlock, then fpageqlock. */ 57 struct mutex pageqlock; /* lock for active/inactive page q */ 58 struct mutex fpageqlock; /* lock for free page q + pdaemon */ 59 boolean_t page_init_done; /* TRUE if uvm_page_init() finished */ 60 struct uvm_pmr_control pmr_control; /* pmemrange data */ 61 62 /* page daemon trigger */ 63 int pagedaemon; /* daemon sleeps on this */ 64 struct proc *pagedaemon_proc; /* daemon's pid */ 65 66 /* aiodone daemon trigger */ 67 int aiodoned; /* daemon sleeps on this */ 68 struct proc *aiodoned_proc; /* daemon's pid */ 69 struct mutex aiodoned_lock; 70 71 /* static kernel map entry pool */ 72 SLIST_HEAD(, vm_map_entry) kentry_free; /* free page pool */ 73 74 /* aio_done is locked by uvm.aiodoned_lock. */ 75 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 76 77 /* kernel object: to support anonymous pageable kernel memory */ 78 struct uvm_object *kernel_object; 79 }; 80 81 /* 82 * vm_map_entry etype bits: 83 */ 84 85 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 86 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 87 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 88 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 89 #define UVM_ET_HOLE 0x10 /* no backend */ 90 #define UVM_ET_NOFAULT 0x20 /* don't fault */ 91 #define UVM_ET_FREEMAPPED 0x80 /* map entry is on free list (DEBUG) */ 92 93 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 94 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 95 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 96 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 97 #define UVM_ET_ISHOLE(E) (((E)->etype & UVM_ET_HOLE) != 0) 98 #define UVM_ET_ISNOFAULT(E) (((E)->etype & UVM_ET_NOFAULT) != 0) 99 100 #ifdef _KERNEL 101 102 /* 103 * holds all the internal UVM data 104 */ 105 extern struct uvm uvm; 106 107 /* 108 * UVM_WAIT: wait... wrapper around the tsleep() function. 109 */ 110 111 #define UVM_WAIT(event, intr, msg, timo) \ 112 do { \ 113 tsleep(event, PVM|(intr ? PCATCH : 0), msg, timo); \ 114 } while (0) 115 116 /* 117 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 118 */ 119 120 #if defined(UVM_PAGE_TRKOWN) 121 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 122 #else 123 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 124 #endif /* UVM_PAGE_TRKOWN */ 125 126 /* 127 * uvm_map internal functions. 128 * Used by uvm_map address selectors. 129 */ 130 struct vm_map_entry *uvm_map_entrybyaddr(struct uvm_map_addr *, vaddr_t); 131 int uvm_map_isavail(struct vm_map *, 132 struct uvm_addr_state *, 133 struct vm_map_entry **, struct vm_map_entry**, 134 vaddr_t, vsize_t); 135 struct uvm_addr_state *uvm_map_uaddr(struct vm_map *, vaddr_t); 136 struct uvm_addr_state *uvm_map_uaddr_e(struct vm_map *, struct vm_map_entry *); 137 138 #define VMMAP_FREE_START(_entry) ((_entry)->end + (_entry)->guard) 139 #define VMMAP_FREE_END(_entry) ((_entry)->end + (_entry)->guard + \ 140 (_entry)->fspace) 141 142 #endif /* _KERNEL */ 143 144 #endif /* _UVM_UVM_H_ */ 145