From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: John Linn <John.Linn@xilinx.com>
Cc: Tirumala Reddy Marri <tmarri@amcc.com>,
Hollis Blanchard <hollisb@us.ibm.com>,
linuxppc-dev@ozlabs.org
Subject: Re: Question about DBCR0 initialization for 440
Date: Fri, 17 Apr 2009 16:35:32 -0400 [thread overview]
Message-ID: <20090417203531.GB3776@zod.rchland.ibm.com> (raw)
In-Reply-To: <20090417203053.1D692F88052@mail119-dub.bigfish.com>
On Fri, Apr 17, 2009 at 02:30:45PM -0600, John Linn wrote:
>> > Might be worth checking if external debug is enabled, and
>> override it
>> > only if it's not.
>>
>> ppc440x5_um.pdf says that both can be enabled.
>>
>
>The code that I started the thread with, from the fsl file, has conditional for the BDI around it.
>
>We think that we still need that conditional as the code is not Oring in the enable such that it would
>disable external debug mode for the BDI. But we need it this way for our Xilinx pod.
EDM is a read-only bit according to the docs I have. You can't set it (or
clear it) at all. It's only set by external hardware.
josh
next prev parent reply other threads:[~2009-04-17 20:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-14 20:33 Question about DBCR0 initialization for 440 John Linn
2009-04-15 16:24 ` Tirumala Reddy Marri
2009-04-17 15:46 ` John Linn
2009-04-17 17:22 ` Josh Boyer
2009-04-17 18:07 ` Hollis Blanchard
2009-04-17 19:04 ` Benjamin Herrenschmidt
2009-04-17 19:10 ` Grant Likely
2009-04-17 20:30 ` John Linn
2009-04-17 20:35 ` Josh Boyer [this message]
2009-04-17 20:41 ` John Linn
2009-04-17 20:54 ` Josh Boyer
2009-04-17 20:50 ` Hollis Blanchard
2009-04-17 20:57 ` John Linn
2009-04-17 18:57 ` Grant Likely
2009-04-17 18:58 ` John Linn
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