From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by oss.sgi.com id ; Mon, 8 Jan 2001 08:51:37 -0800 Received: from mx.mips.com ([206.31.31.226]:18890 "EHLO mx.mips.com") by oss.sgi.com with ESMTP id ; Mon, 8 Jan 2001 08:51:34 -0800 Received: from newman.mips.com (ns-dmz [206.31.31.225]) by mx.mips.com (8.9.3/8.9.0) with ESMTP id IAA19265; Mon, 8 Jan 2001 08:51:29 -0800 (PST) Received: from copfs01.mips.com (copfs01 [192.168.205.101]) by newman.mips.com (8.9.3/8.9.0) with ESMTP id IAA27482; Mon, 8 Jan 2001 08:51:26 -0800 (PST) Received: from mips.com (copsun17 [192.168.205.27]) by copfs01.mips.com (8.9.1/8.9.0) with ESMTP id RAA00674; Mon, 8 Jan 2001 17:50:51 +0100 (MET) Message-ID: <3A59EFEB.9D35514E@mips.com> Date: Mon, 08 Jan 2001 17:50:51 +0100 From: Carsten Langgaard X-Mailer: Mozilla 4.75 [en] (X11; U; SunOS 5.7 sun4u) X-Accept-Language: en MIME-Version: 1.0 To: Ralf Baechle CC: "Maciej W. Rozycki" , "Kevin D. Kissell" , linux-mips@oss.sgi.com, Michael Shmulevich Subject: Re: User applications References: <00d801c0797d$5cc410c0$0deca8c0@Ulysses> <20010108140506.B886@bacchus.dhis.org> <3A59E978.873182CB@mips.com> <20010108143014.E886@bacchus.dhis.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mips@oss.sgi.com Precedence: bulk Return-Path: X-Orcpt: rfc822;linux-mips-outgoing Exactly that I need, but I don't think it is implemented properly for mips. It simply flushes all the caches, no matter what options you gives it. /Carsten Ralf Baechle wrote: > On Mon, Jan 08, 2001 at 05:23:20PM +0100, Carsten Langgaard wrote: > > > What we need is a mechanism to partial invalidate the I-cache and a mechanism > > to write-back and/or invalidate the D-cache. > > There is this nice little man page which should even be installed on your > Linux/Inhell box: > > CACHEFLUSH(2) Linux Programmer's Manual CACHEFLUSH(2) > > NAME > cacheflush - flush contents of instruction and/or data > cache > > SYNOPSIS > #include > > int cacheflush(char *addr, int nbytes, int cache); > > DESCRIPTION > cacheflush flushes contents of indicated cache(s) for user > addresses in the range addr to (addr+nbytes-1). Cache may > be one of: > > ICACHE Flush the instruction cache. > > DCACHE Write back to memory and invalidate the affected > valid cache lines. > > BCACHE Same as (ICACHE|DCACHE). > > RETURN VALUE > cacheflush returns 0 on success or -1 on error. If errors > are detected, errno will indicate the error. > > ERRORS > EINVAL cache parameter is not one of ICACHE, DCACHE, or > BCACHE. > > EFAULT Some or all of the address range addr to > (addr+nbytes-1) is not accessible. > > BUGS > The current implementation ignores the addr and nbytes > parameters. Therefore always the whole cache is flushed. > > NOTE > This system call is only available on MIPS based systems. > It should not be used in programs intended to be portable. > > Linux 2.0.32 27 June 95 1 -- _ _ ____ ___ Carsten Langgaard Mailto:carstenl@mips.com |\ /|||___)(___ MIPS Denmark Direct: +45 4486 5527 | \/ ||| ____) Lautrupvang 4B Switch: +45 4486 5555 TECHNOLOGIES 2750 Ballerup Fax...: +45 4486 5556 Denmark http://www.mips.com