Re: [edk] option ROM debugging

[Alex X. <xin...@gm...>]

DEBUG() macro is only supported in debug build. You cannot use that macro in
a production build.

I suggest that you can try to direct write your debug message to serial
port.

On Sat, Jul 3, 2010 at 2:42 AM, rangasai C <ran...@gm...> wrote:

> Hi all,
> I am working on PCIe option ROM development. My driver works fine as long
> as I load it from the shell. This mean, I can load from the shell and talk
> to my drive. However, when I convert my driver (.efi file) into a .rom file
> (using efirom.exe utility) and then flash my card with this image and reboot
> my target system, I am seeing all kinds of issues (like no video, or video
> comes and system reboots etc. ).. With some elementary debugging techniques
> (since I can't use Prints at this stage), I could verify that the option ROM
> image is shadowed properly but looks like there are some issues with the
> initialization code. What I am missing is a good debugging environment, to
> root cause the issue.
> I don't have an ITP but from the spec, I read that I could use the DEBUG()
> macro.
> Could anybody explain how I could use this macro to output my debug prints
> onto a COM port and see it in hyperterminal ?
>
> My Target system is an Intel DG43GT motherboard. I tried connecting the
> 9pin serial port header to my host system via a Null cable and USB to COM
> connector but no luck. Also I don't see any option to do serial redirection.
> When I type "sermode" in shell, it can't find any devices.
> Is this motherboard a good test bench for option ROM development or should
> I think of changing it.
>
> Any pointers would be very helpful.
>
> Thanks in advance.
>
> Regards,
> Sai Chaganty
>
>
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