[U-Boot-Users] BDI3000 and PPC460GT board
Hello,
I am trying to control the amcc glacier (evkit460gt) eval board with a BDI3000, using the config file from ftp://78.31.64.234/bdigdb/config/powerpc/ppc4xx/ppc440/evkit460gt.cfg (modulo my local IP/tftp configuration).
The problem is that the board fails to run under the BDI control, and runs just fine without it.
When looking closer I see that the bdi resets the board properly and takes it all the way to the point where the TLBs are set and the rfi instruction is executed to jump out of the original 4k window. At this point a TLB exception is thrown, that is it loos like TLB programming 'did not take' while under BDI control. So, if I just reset the board and let it run, it keeps cycling through TLB error exception as no memory other than the top 4k bytes is accessible. Again, it works just fine without the BDI.
Any hints and suggestions will be highly appreciated,
TIA, Vadim
Hi Vadim,
On Wednesday 09 July 2008, vb wrote:
I am trying to control the amcc glacier (evkit460gt) eval board with a BDI3000, using the config file from ftp://78.31.64.234/bdigdb/config/powerpc/ppc4xx/ppc440/evkit460gt.cfg (modulo my local IP/tftp configuration).
I attached my local version for you. Perhaps this works better. It works here fine on my Glacier.
The problem is that the board fails to run under the BDI control, and runs just fine without it.
When looking closer I see that the bdi resets the board properly and takes it all the way to the point where the TLBs are set and the rfi instruction is executed to jump out of the original 4k window. At this point a TLB exception is thrown, that is it loos like TLB programming 'did not take' while under BDI control. So, if I just reset the board and let it run, it keeps cycling through TLB error exception as no memory other than the top 4k bytes is accessible. Again, it works just fine without the BDI.
Any hints and suggestions will be highly appreciated,
What command are you using to "control" the PPC? "reset halt" will run you initialization from the script and halt the PPC. "reset run" will skip this init and give just run the PPC (hopefully to the U-Boot prompt).
Best regards, Stefan
===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de =====================================================================
On Wed, Jul 9, 2008 at 11:40 AM, Stefan Roese sr@denx.de wrote:
Hi Vadim,
On Wednesday 09 July 2008, vb wrote:
I am trying to control the amcc glacier (evkit460gt) eval board with a BDI3000, using the config file from ftp://78.31.64.234/bdigdb/config/powerpc/ppc4xx/ppc440/evkit460gt.cfg (modulo my local IP/tftp configuration).
I attached my local version for you. Perhaps this works better. It works here fine on my Glacier.
Stefan, this works like a charm, thank you so much for a prompt reply!
cheers, \vb
The problem is that the board fails to run under the BDI control, and runs just fine without it.
When looking closer I see that the bdi resets the board properly and takes it all the way to the point where the TLBs are set and the rfi instruction is executed to jump out of the original 4k window. At this point a TLB exception is thrown, that is it loos like TLB programming 'did not take' while under BDI control. So, if I just reset the board and let it run, it keeps cycling through TLB error exception as no memory other than the top 4k bytes is accessible. Again, it works just fine without the BDI.
Any hints and suggestions will be highly appreciated,
What command are you using to "control" the PPC? "reset halt" will run you initialization from the script and halt the PPC. "reset run" will skip this init and give just run the PPC (hopefully to the U-Boot prompt).
Best regards, Stefan
===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de =====================================================================
participants (2)
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Stefan Roese -
vb