This might be interesting for some guys interested in porting Linux
to cheapo embedded MIPS CPUs. Linux still lacks the support for thingies
like the R4640 base / bounds register pair.
From: "D. Jeff Dionne" <firstname.lastname@example.org>
Subject: Linux ported to non MMU systems
Date: Wed, 11 Feb 1998 21:02:28 GMT
Approved: email@example.com (Mikko Rauhala)
Old-Date: Mon, 9 Feb 1998 22:08:49 -0500
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Xref: news.uni-stuttgart.de comp.os.linux.announce:9897
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Announcing The Linux/Microcontroller Project.
Linux has been ported to 68000 processors _without_ Memory Management
Units. This is the first port of Linux that does not require an MMU.
The first platform supported is the 3Com PalmPilot or IBM Workpad with
a TRG SuperPilot memory card. Next to be supported will be the Motorola
MC68332 microcontroller, expected in the next few weeks.
Linux for embedded systems is a great idea.
Who and when:
Part of The Silver Hammer Group Ltd's programming team. Kenneth
Albanowski and D. Jeff Dionne produced a booting Linux kernel for the
PalmPilot during the week of Jan26 1998. Due to the structure of the
linux memory management code, the port to a flat contiguous vs. paged
virtual memory system went very smoothly.
The kernel boots on a plain old 68000 CPU, TCP/IP and all, mounts a
ROMFS root filesystem and runs a special hand crafted /etc/init in user
space as well as a handful of kernel threads happily printing
We are still working on libc, and the compiler support is still in flux. If
you are interested in Linux on small or embedded machines, visit the uClinux
home page at http://ryeham.ee.ryerson.ca/uClinux We even have a nifty
screen shot of Linux running on the PalmPilot simulator XCoPilot. Stop
by and lend a hand.
We can be contacted about the Linux/Microcontroller project at
D. Jeff Dionne
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