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From: Shawn Jin <shawnxjin@gmail.com>
To: ppcembed <linuxppc-embedded@ozlabs.org>
Subject: Interrupt prioritization on linux for ppc440
Date: Fri, 15 Apr 2005 14:36:51 -0700	[thread overview]
Message-ID: <c3d0340b05041514362746169a@mail.gmail.com> (raw)

Hi,

The home-made interrupt controller PIC supports interrupt priorities
and critical/non-critical interrupts. I found that the current kernel
doesn't support interrupt priorities. Is this observation true? Is
there any existing patch to support that? Can RTAI or RTLinux
prioritize interrupts?

I noticed that the implementation of ppc4xx_pic.c disables all
critical interrupts during initialization. To support critical
interrupts, is it so simple that we change the handler of critical
exception from CriticalInput to do_IRQ in head_44x.S?

Would you please share some of your inputs with me while I'm googling
this issue?

Thanks,
-Shawn.

             reply	other threads:[~2005-04-15 21:36 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-15 21:36 Shawn Jin [this message]
2005-04-15 22:12 ` Interrupt prioritization on linux for ppc440 Eugene Surovegin
2005-04-15 23:09   ` Shawn Jin
2005-04-16  0:50     ` Eugene Surovegin
2005-04-18 21:14       ` Shawn Jin
2005-04-18 22:06         ` Eugene Surovegin
2005-04-18 23:11           ` Shawn Jin
2005-04-19  0:27             ` Eugene Surovegin
2005-04-18 17:01     ` Lawrence E. Bakst
2005-04-18 17:25       ` Eugene Surovegin
2005-04-18 20:54         ` Lawrence E. Bakst
2005-04-18 22:27           ` Eugene Surovegin

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