RE: [U-Boot-Users] ppc440gx
I am trying to get U-boot on a custome ppc440gx board (CPU, 64MB RAM and the 2 gigabit port).
I have a problem, I am receiving this exception below. This happen when the EE bit is set in interrupt_init.
kgdb: handle_exception; trap [0xb00]
I am not sure what is the source of this exception. (decrementer should be 0x900)
Before that I was getting exception 0x500(external interrupt) and trace it to the UIC registers(polarity, trigger,...) being cleared (where?). So I restore their value in interrrupt_init_cpu.
Note that I have run vxWorks and Linux on this board. I could believe I broke something.
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]On Behalf Of philipv@cam.org Sent: Thursday, September 02, 2004 3:29 PM To: u-boot-users@lists.sourceforge.net Subject: [U-Boot-Users] Booting in IPv6
Is there any support planned or in progress for booting in an IPv6 network?
Philip
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Barbier, Renaud (GE Infrastructure) wrote:
kgdb: handle_exception; trap [0xb00]
I am not sure what is the source of this exception. (decrementer should be 0x900)
Before that I was getting exception 0x500(external interrupt) and trace it to the UIC registers(polarity, trigger,...) being cleared (where?). So I restore their value in interrrupt_init_cpu.
My numbers don't quite agree with yours... but I think you might be seeing "Fixed Interval Timer" as the source of the exception. Sounds like you are enabling interrupts before the handlers have been registered.
Just a guess, probably others know better... -Ralph
Make sure you have your SDRAM setting set properly. Did you do your timing analysis? If your custom board has the SDRAM very close to the processor you will need to set your clock phase advance in the 45 to 70 degree range. My board would generate inconsistent exceptions with the IBM recommended 90 phase advance setting.
Good luck, Carl
--- "Barbier, Renaud (GE Infrastructure)" Renaud.Barbier@ge.com wrote:
I am trying to get U-boot on a custome ppc440gx board (CPU, 64MB RAM and the 2 gigabit port).
I have a problem, I am receiving this exception below. This happen when the EE bit is set in interrupt_init.
kgdb: handle_exception; trap [0xb00]
I am not sure what is the source of this exception. (decrementer should be 0x900)
Before that I was getting exception 0x500(external interrupt) and trace it to the UIC registers(polarity, trigger,...) being cleared (where?). So I restore their value in interrrupt_init_cpu.
Note that I have run vxWorks and Linux on this board. I could believe I broke something.
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]On Behalf Of philipv@cam.org Sent: Thursday, September 02, 2004 3:29 PM To: u-boot-users@lists.sourceforge.net Subject: [U-Boot-Users] Booting in IPv6
Is there any support planned or in progress for booting in an IPv6 network?
Philip
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participants (3)
-
Barbier, Renaud (GE Infrastructure) -
Carl Riechers -
Ralph Siemsen