/* $NetBSD: uvm.h,v 1.63 2012/02/02 19:43:08 tls Exp $ */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp */ #ifndef _UVM_UVM_H_ #define _UVM_UVM_H_ #if defined(_KERNEL_OPT) #include "opt_lockdebug.h" #include "opt_multiprocessor.h" #include "opt_uvmhist.h" #include "opt_uvm_page_trkown.h" #endif #include #ifdef _KERNEL #include #endif /* * pull in prototypes */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef _KERNEL /* * pull in VM_NFREELIST */ #include struct workqueue; /* * per-cpu data */ struct uvm_cpu { struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ int page_free_nextcolor; /* next color to allocate from */ int page_idlezero_next; /* which color to zero next */ bool page_idle_zero; /* TRUE if we should try to zero pages in the idle loop */ int pages[PGFL_NQUEUES]; /* total of pages in page_free */ u_int emap_gen; /* emap generation number */ uintptr_t last_fltaddr; /* last faulted address */ uintptr_t last_delta; /* difference of last two flt addrs */ uintptr_t last_delta2; /* difference of differences */ krndsource_t rs; /* entropy source */ }; /* * uvm structure (vm global state: collected in one structure for ease * of reference...) */ struct uvm { /* vm_page related parameters */ /* vm_page queues */ struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ bool page_init_done; /* TRUE if uvm_page_init() finished */ /* page daemon trigger */ int pagedaemon; /* daemon sleeps on this */ struct lwp *pagedaemon_lwp; /* daemon's lid */ /* aiodone daemon */ struct workqueue *aiodone_queue; /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ /* per-cpu data */ struct uvm_cpu *cpus[MAXCPUS]; }; /* * kernel object: to support anonymous pageable kernel memory */ extern struct uvm_object *uvm_kernel_object; /* * locks (made globals for lockstat). */ extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ extern kmutex_t uvm_fpageqlock; /* lock for free page q */ extern kmutex_t uvm_kentry_lock; extern kmutex_t uvm_swap_data_lock; #endif /* _KERNEL */ /* * vm_map_entry etype bits: */ #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) #ifdef _KERNEL /* * holds all the internal UVM data */ extern struct uvm uvm; /* * historys */ #ifdef UVMHIST UVMHIST_DECL(maphist); UVMHIST_DECL(pdhist); UVMHIST_DECL(ubchist); UVMHIST_DECL(loanhist); #endif extern struct evcnt uvm_ra_total; extern struct evcnt uvm_ra_hit; extern struct evcnt uvm_ra_miss; /* * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the * interlocked tsleep() function. */ #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ do { \ (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ msg, timo, slock); \ } while (/*CONSTCOND*/ 0) void uvm_kick_pdaemon(void); /* * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) */ #if defined(UVM_PAGE_TRKOWN) #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) #else #define UVM_PAGE_OWN(PG, TAG) /* nothing */ #endif /* UVM_PAGE_TRKOWN */ #include #endif /* _KERNEL */ #endif /* _UVM_UVM_H_ */