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SubjectRe: Old platforms: bring out your dead
Hi Arnd,

On Mon, Jan 11, 2021 at 9:59 AM Arnd Bergmann <> wrote:
> On Mon, Jan 11, 2021 at 9:19 AM Geert Uytterhoeven <> wrote:
> > On Fri, Jan 8, 2021 at 11:55 PM Arnd Bergmann <> wrote:
> > > * MIPS R3000/TX39xx: 32-bit MIPS-II generation, mostly superseded by
> > > 64-bit MIPS-III (R4000 and higher) starting in 1991. arch/mips still
> > > supports these in DECstation and Toshiba Txx9, but it appears that most
> > > of those machines are of the 64-bit kind. Later MIPS32 such as 4Kc and
> > > later are rather different and widely used.
> >
> > I have a (32-bit) RBTX4927 development board in my board farm, boot-test
> > every bi-weekly renesas-drivers release on it, and fix kernel issues
> > when they appear.
> Right, I was specifically thinking of the MIPS-II/R3000 ones here, I know
> there are users on multiple actively maintained MIPS-III platforms.
> Regarding 32-bit vs 64-bit kernels, can you clarify what makes this one
> a 32-bit board? Is this just your preference for which kernel you install,
> or are there dependencies on firmware or hardware that require running
> this machine in 32-bit mode?

TX492x is 32-bit (/proc/cpuinfo says mips1/mips2/mips3), TX493x is 64-bit.
As Debian dropped support for mips3 and older, I'm stuck at a Jessie nfsroot.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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