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.\" $FreeBSD$ 27.\" 28.Dd July 21, 2003 29.Dt PMAP_COPY 9 30.Sh NAME 31.Nm pmap_copy , 32.Nm pmap_copy_page 33.Nd copy physical memory pages 34.Sh SYNOPSIS 35.In sys/param.h 36.In vm/vm.h 37.In vm/pmap.h 38.Ft void 39.Fn pmap_copy "pmap_t dst_pmap" "pmap_t src_pmap" "vm_offset_t dst_addr" \ 40"vm_size_t len" "vm_offset_t src_addr" 41.Ft void 42.Fn pmap_copy_page "vm_page_t src" "vm_page_t dst" 43.Sh DESCRIPTION 44The 45.Fn pmap_copy 46function copies the range specified by 47.Fa src_addr 48and 49.Fa len 50from the source physical map 51.Fa src_pmap 52to the destination physical map 53.Fa dst_pmap 54at the address 55.Fa dst_addr . 56.Pp 57The 58.Fn pmap_copy_page 59function 60copies the physical page 61.Fa src 62to the physical page 63.Fa dst , 64by mapping the page into kernel virtual address space (KVA), and using 65.Fn bcopy 66to copy the page. 67.Sh IMPLEMENTATION NOTES 68The 69.Fn pmap_copy 70routine is only advisory and need not do anything. 71Actually implementing it may seriously reduce system performance. 72.Pp 73The 74.Fn pmap_copy_page 75routine only operates upon a single page. 76.Sh SEE ALSO 77.Xr bcopy 3 , 78.Xr pmap 9 79.Sh AUTHORS 80This manual page was written by 81.An Bruce M Simpson Aq bms@spc.org . 82