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Posted Jun 11, 2015 13:49 UTC (Thu) by NickeZ (guest, #100097)
Parent article: Resurrecting the SuperH architecture

How does it compare to LM32 [1]?

[1]: http://www.ohwr.org/projects/lm32


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Posted Jun 11, 2015 19:21 UTC (Thu) by arnd (subscriber, #8866) [Link] (1 responses)

The Linux port for LM32 sadly never made it in, and while the code was basically ready for inclusion a few years ago, interest for MMU-less Linux ports has dropped dramatically in the past few years. We merged nios2 recently, but only support the MMU-based variants of that.

Interestingly, a MMU-less systems seem to have a small revival this year, with several ARMv7-M microprocessor lines getting added, and a return of the h8300 Linux port that was removed in 2013.

Compare to LM32

Posted Jun 19, 2015 0:13 UTC (Fri) by landley (guest, #6789) [Link]

Yeah, Jeff did uclinux.org but handed it off in 2003 when he moved to Japan. The people he handed it off to more or less let it rot (their CVS repository died in a hard drive crash years ago, and the page is still 404, for example), and the fact a distro and a "linux for nommu community site" got tied together meant that when the distro went stale, the community site stopped working too.

To try to address this we've recently created http://nommu.org and we're slowly populating it with content and a mailing list and wiki and such. Alas, the bitstream stuff has been eating all our time recently but once that's on its feet we'll be advancing both projects in parallel. (The purpose of nommu.org is to support all the nommu linux variants, including cortex-m and coldfire and so on. The superh revival is http://0pf.org stuff. We _don't_ want j2 to overshadow h8000 and armv7-r and such on nommu.org, but while j2 is eating our brains it means we're not posting much to nommu.org yet.)

Linux for nommu _is_ interesting, there just hasn't been a place to go to talk about it that wasn't tied to a distro full of leftover packages from the 1990's. We want to push nommu support into buildroot and openembedded and make it _not_ be a strange esoteric thing requiring unusual expertise.

Working on it...

Rob


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