Hello all:

I would like to understand if the= re is a way to program the PCI interrupt pin register of MPC8540. I did loo= k 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 P= CI 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

----- Origin= al Message ----
From: Kumar Gala <galak@kernel.crashing.org>
To: Wang Mat= thew-R59995 <Qi.W@freescale.com>
Cc: linuxppc-embedded@ozlabs.org<= br>Sent: Wednesday, 18 October, 2006 6:54:24 PM
Subject: Re: Linuxppc-em= bedded Digest, Vol 26, Issue 36

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

> 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 Linu= x 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 gu= ys met similar scenario like me. I
> don't
> need t= he precise answer, just overall suggestion about it because I
> understand that= not everyone has the same bootloader of mine, that
> bootloader is a= ctually a customized bootloader.

I understand that, thus I was askin= g what exact problem you were
seeing to try and help.
> Anyway thank you.
>
> R9 point to LR register, mask the h= igh 20 bit of r9 and send to r7,
> and
> then add 2= 4, 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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