[U-Boot-Users] AMCC 440SP PCIX Register access with BDI2000?

[U-Boot-Users] AMCC 440SP PCIX Register access with BDI2000?

[Jeff Stevens]

Is there any way to access the PCIX Registers using
the BDI2000?  I accidentally set the CPU wait bit for
PCIX1, and now it won't boot.  If I could access the
PCIX registers (located and 0x91EC80044) I could clear
the wait bit, and start U-Boot.  However, it looks
like the BDI2000 can only access 32-bit addresses, so
when I have it dump 0x91ec80044 it dumps 0x1ec80044
instead.  Is there an indirect access register set?

Thanks,
   Jeff Stevens

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[U-Boot-Users] AMCC 440SP PCIX Register access with BDI2000?

[Jeff Mock]

I can only give you half an answer.  The BDI2000 config file lets you
setup TLB entries.  For my 440GX board I have the following in the
[INIT] section of the config file:

WTLB    0xe0000095  0x1400001B

This maps the 32-bit virtual address 0xe0000000 to the 36-bit physical
address 0x140000000.  A similar incantation should map the PCIX
registers into the 32-bit address space, but I don't remember the format
of the fields in the command...

jeff



Jeff Stevens wrote:
> Is there any way to access the PCIX Registers using
> the BDI2000?  I accidentally set the CPU wait bit for
> PCIX1, and now it won't boot.  If I could access the
> PCIX registers (located and 0x91EC80044) I could clear
> the wait bit, and start U-Boot.  However, it looks
> like the BDI2000 can only access 32-bit addresses, so
> when I have it dump 0x91ec80044 it dumps 0x1ec80044
> instead.  Is there an indirect access register set?
> 
> Thanks,
>    Jeff Stevens
> 
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> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
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