Re: PCI IRQ -MPC8540

Is this the pin used for the external messaging?


On 1/16/07, agnel juni [off-list ref] wrote:

Hello all:

I would like to understand if there is a way to program the PCI interrupt
pin register of MPC8540. I did look for this in the datasheet, but couldn't
find any positive answer.

Currently, I am working in a set-up where MPC8540 is an agent, plugged into
the PC host.
I couldn't get an IRQ for the card when plugged in some PCI slots, whereas
in one of the slots I do see a non-zero value.

It would be great if you could help me understand the issue.

I am sorry if the question is inapporpriate in the group. I am desperate to
solve the issue.

Thanks for any help.
J.Joseph

----- Original Message ----
From: Kumar Gala <redacted>
To: Wang Matthew-R59995 <redacted>
Cc: linuxppc-embedded@ozlabs.org
Sent: Wednesday, 18 October, 2006 6:54:24 PM
Subject: Re: Linuxppc-embedded Digest, Vol 26, Issue 36


On Oct 18, 2006, at 8:10 PM, Wang Matthew-R59995 wrote:

quoted

Hi Kumar,

Actually I do many trials about it. Vxwerks Bootrom is smaller than
U-Boot. The key difference between Bootrom and U-boot is that some
source code of Bootrom is invisible to the users.

Actually the rfi instruction which I point out is the first rfi
instruction of Linux PowerPC bringup.

Before that, it's TLB entry invalidation and temp TLB entry mapping.

I check MMU setting carefully before coming Linux Kernel.

I just want to know if other guys met similar scenario like me. I
don't
need the precise answer, just overall suggestion about it because I
understand that not everyone has the same bootloader of mine, that
bootloader is actually a customized bootloader.

I understand that, thus I was asking what exact problem you were
seeing to try and help.

quoted

Anyway thank you.

R9 point to LR register, mask the high 20 bit of r9 and send to r7,
and
then add 24, which means stride 6 instructions for rfi instruction
execution.

Of course, rfi can switch the TLB entry, both the previous TLB
entry and
the temp TLB entry point to the same physical address.

I've checked it.

I know what the code does, I wrote it :)

- kumar



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