1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd July 21, 2003 27.Dt PMAP_COPY 9 28.Os 29.Sh NAME 30.Nm pmap_copy , 31.Nm pmap_copy_page 32.Nd copy physical memory pages 33.Sh SYNOPSIS 34.In sys/param.h 35.In vm/vm.h 36.In vm/pmap.h 37.Ft void 38.Fo pmap_copy 39.Fa "pmap_t dst_pmap" "pmap_t src_pmap" "vm_offset_t dst_addr" 40.Fa "vm_size_t len" "vm_offset_t src_addr" 41.Fc 42.Ft void 43.Fn pmap_copy_page "vm_page_t src" "vm_page_t dst" 44.Sh DESCRIPTION 45The 46.Fn pmap_copy 47function copies the range specified by 48.Fa src_addr 49and 50.Fa len 51from the source physical map 52.Fa src_pmap 53to the destination physical map 54.Fa dst_pmap 55at the address 56.Fa dst_addr . 57.Pp 58The 59.Fn pmap_copy_page 60function 61copies the physical page 62.Fa src 63to the physical page 64.Fa dst , 65by mapping the page into kernel virtual address space (KVA), and using 66.Fn bcopy 67to copy the page. 68.Sh IMPLEMENTATION NOTES 69The 70.Fn pmap_copy 71routine is only advisory and need not do anything. 72Actually implementing it may seriously reduce system performance. 73.Pp 74The 75.Fn pmap_copy_page 76routine only operates upon a single page. 77.Sh SEE ALSO 78.Xr bcopy 3 , 79.Xr pmap 9 80.Sh AUTHORS 81This manual page was written by 82.An Bruce M Simpson Aq Mt bms@spc.org . 83