Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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$FreeBSD$

.Dd July 21, 2003 .Dt PMAP_CHANGE_WIRING 9 .Os .Sh NAME .Nm pmap_change_wiring .Nd change physical wiring for a map or virtual address pair .Sh SYNOPSIS n sys/param.h n vm/vm.h n vm/pmap.h .Ft void .Fn pmap_change_wiring "pmap_t pmap" "vm_offset_t va" "boolean_t wired" .Sh DESCRIPTION The .Fn pmap_change_wiring function changes the wiring attribute for the page at virtual address .Fa va in the physical map .Fa pmap . A wired page gets its name from being .Dq wired into the system page tables so that it will not be paged out.

p The mapping must already exist in the .Fa pmap . If .Fa wired is .Dv TRUE , the map's wired page count will be incremented; if .Dv FALSE , it will be decremented.

p It is typically called by the .Fn vm_fault_unwire function. .Sh SEE ALSO .Xr pmap 9 .Sh AUTHORS This manual page was written by .An Bruce M Simpson Aq bms@spc.org .