From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by oss.sgi.com id ; Wed, 21 Feb 2001 20:12:20 -0800 Received: from [208.170.106.25] ([208.170.106.25]:2323 "EHLO blackdog.wirespeed.com") by oss.sgi.com with ESMTP id ; Wed, 21 Feb 2001 20:12:17 -0800 Received: from redhat.com (IDENT:joe@dhcp-246.hsv.redhat.com [172.16.17.246] (may be forged)) by blackdog.wirespeed.com (8.9.3/8.9.3) with ESMTP id WAA23751; Wed, 21 Feb 2001 22:07:08 -0600 Message-ID: <3A949279.5020707@redhat.com> Date: Wed, 21 Feb 2001 22:15:53 -0600 From: Joe deBlaquiere Organization: Red Hat, Inc. User-Agent: Mozilla/5.0 (X11; U; Linux 2.2.17-14 i686; en-US; 0.8) Gecko/20010217 X-Accept-Language: en MIME-Version: 1.0 To: Crossfire CC: kjlin , linux-mips@oss.sgi.com Subject: Re: Does linux support for microprocessor without MMU? References: <00ba01c09c6e$84788380$056aaac0@kjlin> <20010222133602.A24899@eris.xware.cx> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mips@oss.sgi.com Precedence: bulk Return-Path: X-Orcpt: rfc822;linux-mips-outgoing Crossfire wrote: > kjlin was once rumoured to have said: > >> Howdy, >> >> I got an embedded MIPS board recently. >> It has the following features: >> - CPU implements a five-stage pipeline with performance similar to the MIPS R3000 pipeline. >> - MIPS32 compatible instruction set >> - R4000 style privileged resource architecture. >> - Without MMU. >> >> I am estimating the possibility of porting linux on it. >> Can Linux/MIPS 2.2 or 2.4 support for such a board which without MMU ? >> Because i consider it is the most difficult part in the porting process. >> Am i right? > > > the Standard Linux kernels all require an MMU. However, there is a > version of the kernel known as "ucLinux" (Microcontroller Linux) which > will run on CPUs without MMU. > > I don't know if ucLinux has a MIPS target yet. > > C. There isn't (yet) support for MIPS on uClinux. -- Joe (aka joe@uclinux.org)