From: Ralf Baechle <ralf@linux-mips.org>
To: "Liu Hongming (Alan)" <alanliu@trident.com.cn>
Cc: Adeel Malik <AdeelM@quartics.com>, linux-mips@linux-mips.org
Subject: Re: How to request an IRQ for NMI on MIPS Processor
Date: Tue, 11 Nov 2003 06:45:29 +0100 [thread overview]
Message-ID: <20031111054529.GA26238@linux-mips.org> (raw)
In-Reply-To: <15F9E1AE3207D6119CEA00D0B7DD5F6801C9949F@TMTMS>
On Tue, Nov 11, 2003 at 01:26:53PM +0800, Liu Hongming (Alan) wrote:
> I have understood your situation.
>
> Under this situation,I think you need not use request_irq.
Request_irq is just the software interface; it could be used to drive
any kind of interrupt mechanism, even NMI or the two MIPS software
interrupts. The actual problem here is the underlying hardware
mechanism and firmware.
> Just keep your 'interrupt' handler in BIOS or bootloader,
> of course,it is different with Rest Exception,since
> many registers' status are not the same as hardware-reseting.
> You could detect the difference.Right?
Note the firmware is usually in some kind of PROM (sloooow) and also
running uncached. One reasons of many why the MIPS NMI is only a good
idea for fatal events.
Ralf
next prev parent reply other threads:[~2003-11-11 5:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-11 5:26 How to request an IRQ for NMI on MIPS Processor Liu Hongming (Alan)
2003-11-11 5:45 ` Ralf Baechle [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-11-11 5:21 Adeel Malik
2003-11-11 4:39 Liu Hongming (Alan)
2003-11-11 2:51 Liu Hongming (Alan)
2003-11-11 3:40 ` Ralf Baechle
2003-11-04 12:58 Adeel Malik
2003-11-04 13:28 ` Ralf Baechle
2003-11-04 11:56 Adeel Malik
2003-11-04 12:30 ` Ralf Baechle
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