On Fri, Apr 17, 2009 at 02:41:26PM -0600, John Linn wrote: > > >> -----Original Message----- >> From: Josh Boyer [mailto:jwbo...@linux.vnet.ibm.com] >> Sent: Friday, April 17, 2009 2:36 PM >> To: John Linn >> Cc: grant.lik...@secretlab.ca; Benjamin Herrenschmidt; >> linuxppc-dev@ozlabs.org; Hollis Blanchard; Tirumala Reddy Marri >> Subject: Re: Question about DBCR0 initialization for 440 >> >> 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. > >That's strange, my 440x4_um.pdf does not say it's read-only unless it's >in some obscure place.
Gah. I think that was my mistake. I don't see that in x4 or x5 manuals, but it came up on IRC. josh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
