1.\" $NetBSD: arm_drain_writebuf.2,v 1.1 2002/03/30 06:24:34 thorpej Exp $ 2.\" 3.\" Copyright (c) 1997 Mark Brinicombe 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by Mark Brinicombe 17.\" 4. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.Dd March 29, 2002 34.Dt ARM_DRAIN_WRITEBUF 2 arm 35.Os 36.Sh NAME 37.Nm arm_drain_writebuf 38.Nd drains the cpu write buffer 39.Sh LIBRARY 40.Lb libarm 41.Sh SYNOPSIS 42.Fd #include \*[Lt]machine/sysarch.h\*[Gt] 43.Ft int 44.Fn arm_drain_writebuf 45.Sh DESCRIPTION 46.Fn arm_drain_writebuf 47will make sure that all the entries in the processor write buffer are 48written out to memory. 49.Pp 50Not all processors support this operation (currently only the SA110). 51Those processes that do not treat this function as a null-op. 52.Sh ERRORS 53.Fn arm_drain_writebuf 54will never fail so will always return 0. 55.Sh REFERENCES 56StrongARM Data Sheet 57