From: Ralf Baechle <ralf@linux-mips.org>
To: arrow zhang <arrow.ebd@gmail.com>
Cc: linux-mips@linux-mips.org
Subject: Re: [Help] R3000 CPU porting, Oops while run app
Date: Tue, 17 Aug 2010 13:42:46 +0100 [thread overview]
Message-ID: <20100817124246.GA14155@linux-mips.org> (raw)
In-Reply-To: <AANLkTikW2_NNj52goVm-h9yvHZb3e-TktmOY5jDHPpRe@mail.gmail.com>
On Tue, Aug 17, 2010 at 11:49:27AM +0800, arrow zhang wrote:
> yeah, I have known some reason on it:
> * not call "mips_cpu_irq_init" in function "arch_init_irq"
> * and did not use "set_irq_chip_and_handler"
> * before I only setup the "chip" with code "irq_desc[i].chip =
> &irq_type;", but it is for old kernel(2.6.19)
>
> so new code is:
> void __init arch_init_irq(void)
> {
> int i;
>
> mips_cpu_irq_init();
> for (i = 0; i < 32; ++i) {
> set_irq_chip_and_handler(i, &irq_type, handle_level_irq);
> }
> }
Most systems define MIPS_CPU_IRQ_BASE as 0 so be careful that your
set_irq_chip_and_handler loop doesn't overwrite any previous setup by
mips_cpu_irq_init. If your interrupt controller has 32 interrupts you
probably want to assign interrupts 0..7 to the CPU interrupts and 8..39
to the other controller.
Ralf
next prev parent reply other threads:[~2010-08-17 12:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-17 0:28 [Help] R3000 CPU porting, Oops while run app arrow zhang
2010-08-17 3:49 ` arrow zhang
2010-08-17 12:42 ` Ralf Baechle [this message]
2010-08-19 15:14 ` arrow zhang
-- strict thread matches above, loose matches on Subject: below --
2010-08-16 15:44 arrow zhang
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