2003-09-25 19:14:40 +00:00
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.\"
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.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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.\" All rights reserved.
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.\"
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" $FreeBSD$
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.\"
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.Dd July 21, 2003
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.Dt PMAP_OBJECT_INIT_PT 9
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2004-07-06 07:02:31 +00:00
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.Os
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2003-09-25 19:14:40 +00:00
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.Sh NAME
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.Nm pmap_object_init_pt
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.Nd initialize page tables for a VM object
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.Sh SYNOPSIS
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.In sys/param.h
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.In vm/vm.h
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.In vm/pmap.h
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.Ft void
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2004-07-05 18:13:50 +00:00
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.Fo pmap_object_init_pt
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.Fa "pmap_t pmap" "vm_offset_t addr" "vm_object_t object"
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.Fa "vm_pindex_t pindex" "vm_size_t size" "int limit"
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.Fc
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2003-09-25 19:14:40 +00:00
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.Sh DESCRIPTION
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The
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.Fn pmap_object_init_pt
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function preloads the page table entries into the specified physical map
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.Fa pmap ,
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for the given
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.Fa object
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at the virtual address
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.Fa addr ,
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for
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.Fa size
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bytes, beginning at the page index
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.Fa pindex
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within the object.
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The map bits
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.Fa limit
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are heeded when creating the mapping.
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.Sh IMPLEMENTATION NOTES
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This function is not strictly required by an architecture's
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.Xr pmap 9
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implementation, but it does provide performance benefits if implemented.
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.Pp
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It is intended to eliminate the blast of soft faults on process
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startup, and immediately following a call to
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.Xr mmap 2 .
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.Sh SEE ALSO
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.Xr pmap 9 ,
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.Xr vm_map 9
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.Sh AUTHORS
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This manual page was written by
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2014-06-26 21:44:30 +00:00
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.An Bruce M Simpson Aq Mt bms@spc.org .
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