RE: [U-Boot-Users] PPC440GX reset command doesn't work
Try putting a scope/logic analyzer on your SYSRESET* line to see if it is getting pulled down when you try to reset from U-Boot.
Marc W. Howard
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Andrew Wozniak Sent: Tuesday, June 07, 2005 10:48 AM To: tsawyer+u-boot@sandburst.com Cc: U-Boot mailing list Subject: Re: [U-Boot-Users] PPC440GX reset command doesn't work
Travis B. Sawyer wrote:
Andrew Wozniak wrote:
Andrew Wozniak wrote:
We have a custom PPC440GX board running a ported version
of U-Boot based
on the OCOTEA codebase. Most U-Boot commands are working
- life is good.
<SNIP>
Just wondering if anyone else with a PPC440 target had any special modifications to make 'reset' work.
Nope, it just works, on 3 different 440gx targets I have. The XES XPedite1000, the Ocotea, and our custom hardware...
hmmm.... will have to investigate further.
Could our problem be related to how our PPC is configured from serial eeprom? Or might is be that DBCR (or some other control register) is misconfigured - disallowing a "system reset"?
Thanks for confirming proper 'reset' operation as currently implemented.
-travis
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Howard, Marc wrote:
Try putting a scope/logic analyzer on your SYSRESET* line to see if it is getting pulled down when you try to reset from U-Boot.
Good point. But shouldn't the core and chip level reset still function, independent of the external reset line? The answer might be buried somewhere in the PPC440 tech manuals.
I might also talk to our hardware guys about this.
Marc W. Howard
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Andrew Wozniak Sent: Tuesday, June 07, 2005 10:48 AM To: tsawyer+u-boot@sandburst.com Cc: U-Boot mailing list Subject: Re: [U-Boot-Users] PPC440GX reset command doesn't work
Travis B. Sawyer wrote:
Andrew Wozniak wrote:
Andrew Wozniak wrote:
We have a custom PPC440GX board running a ported version
of U-Boot based
on the OCOTEA codebase. Most U-Boot commands are working
- life is good.
<SNIP>
Just wondering if anyone else with a PPC440 target had any special modifications to make 'reset' work.
Nope, it just works, on 3 different 440gx targets I have. The XES XPedite1000, the Ocotea, and our custom hardware...
hmmm.... will have to investigate further.
Could our problem be related to how our PPC is configured from serial eeprom? Or might is be that DBCR (or some other control register) is misconfigured - disallowing a "system reset"?
Thanks for confirming proper 'reset' operation as currently implemented.
-travis
This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
participants (2)
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Andrew Wozniak -
Howard, Marc