uart(4) busted on sparc64 now?

Joerg Wunsch j at
Wed Nov 23 08:36:08 PST 2005

As Marcel Moolenaar wrote:

> This is likely phk@'s change to puc(4) to able fast interrupts for
> puc(4) by default. marius@ already informed him that it would break
> sparc64. I don't think this was properly followed-up.

According to bde@, PUC fast interrupts only work iff the system can
obtain a unique IRQ.

I had to use PUC fast interrupts on my i386 box as the multiport board
lost a lot of interrupts.  Due to IRQ sharing I cannot turn off there,
I lose one out of four HME ports on the QFE I've got (which is
acceptable for me).

However, it doesn't appear the IRQs on the sparc64 systems are shared.
Maybe someone wants to drag bde@ into the discussion...

J"org Wunsch                                           Unix support engineer
joerg_wunsch at

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