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.Os 31.Sh NAME 32.Nm pmap_copy , 33.Nm pmap_copy_page 34.Nd copy physical memory pages 35.Sh SYNOPSIS 36.In sys/param.h 37.In vm/vm.h 38.In vm/pmap.h 39.Ft void 40.Fo pmap_copy 41.Fa "pmap_t dst_pmap" "pmap_t src_pmap" "vm_offset_t dst_addr" 42.Fa "vm_size_t len" "vm_offset_t src_addr" 43.Fc 44.Ft void 45.Fn pmap_copy_page "vm_page_t src" "vm_page_t dst" 46.Sh DESCRIPTION 47The 48.Fn pmap_copy 49function copies the range specified by 50.Fa src_addr 51and 52.Fa len 53from the source physical map 54.Fa src_pmap 55to the destination physical map 56.Fa dst_pmap 57at the address 58.Fa dst_addr . 59.Pp 60The 61.Fn pmap_copy_page 62function 63copies the physical page 64.Fa src 65to the physical page 66.Fa dst , 67by mapping the page into kernel virtual address space (KVA), and using 68.Fn bcopy 69to copy the page. 70.Sh IMPLEMENTATION NOTES 71The 72.Fn pmap_copy 73routine is only advisory and need not do anything. 74Actually implementing it may seriously reduce system performance. 75.Pp 76The 77.Fn pmap_copy_page 78routine only operates upon a single page. 79.Sh SEE ALSO 80.Xr bcopy 3 , 81.Xr pmap 9 82.Sh AUTHORS 83This manual page was written by 84.An Bruce M Simpson Aq bms@spc.org . 85