From: Pantelis Antoniou <panto@intracom•gr>
To: robin.gilks@tait•co.nz
Cc: ppc embedded list <linuxppc-embedded@ozlabs•org>
Subject: Re: 8xx bus monitoring
Date: Wed, 26 Jan 2005 09:06:17 +0200 [thread overview]
Message-ID: <41F74169.9050006@intracom.gr> (raw)
In-Reply-To: <41F70114.5040200@tait.co.nz>
Robin Gilks wrote:
> Greetings
>
> System is a MPC859 based controller.
>
> I'm trying to determine whether a peripheral is not responding to memory
> fetches by using the bus monitor feature on the Transfer Acknowledge
> (TA) signal. This is set to the maximum count in the Bus Monitor Timeout
> (BMT) in the System Protect Control Register (SYPCR). The monitoring is
> enabled by setting the Bus Monitor Enable (BME) bit in SYPCR as well.
>
> I understand that I can use the Transfer Error Status Register (TESR) to
> read the fact that I have had a timeout by checking the Data Transfer
> Monitor Timeout (DTMT) bit in this register.
>
> The problem is, how do I know any error has occured so I know to look at
> the TESR. I can't see a way of generating an exception from this
> condition.
>
> Any help appreciated.
>
You get a machine check exception.
It's pretty obvious then :)
Regards
Pantelis
next prev parent reply other threads:[~2005-01-26 7:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-26 2:31 8xx bus monitoring Robin Gilks
2005-01-26 7:06 ` Pantelis Antoniou [this message]
2005-01-30 22:15 ` Robin Gilks
2005-01-31 7:09 ` Pantelis Antoniou
2005-01-31 21:49 ` Robin Gilks
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