1.\" $OpenBSD: arm_drain_writebuf.2,v 1.5 2015/09/14 13:45:25 schwarze Exp $ 2.\" $NetBSD: arm_drain_writebuf.2,v 1.3 2004/02/13 09:56:47 wiz Exp $ 3.\" 4.\" Copyright (c) 1997 Mark Brinicombe 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by Mark Brinicombe 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.Dd $Mdocdate: September 14 2015 $ 35.Dt ARM_DRAIN_WRITEBUF 2 arm 36.Os 37.Sh NAME 38.Nm arm_drain_writebuf 39.Nd drains the CPU write buffer 40.Sh SYNOPSIS 41.In machine/sysarch.h 42.Ft int 43.Fn arm_drain_writebuf void 44.Sh DESCRIPTION 45.Fn arm_drain_writebuf 46will make sure that all the entries in the processor write buffer are 47written out to memory. 48.Pp 49Not all processors support this operation (currently only the SA110 does). 50Those processes that do not, treat this function as a null-op. 51.Sh ERRORS 52.Fn arm_drain_writebuf 53will never fail so will always return 0. 54.Sh REFERENCES 55StrongARM Data Sheet 56