Andrew –
Thanks!
At this point, I’m not sure of anything… not the least of which is the
DebugLib.
Continuing to experiment, I did find that if I compile the PEI driver for IA32
(as opposed to X64), then at least it doesn’t brick the BIOS. Doesn’t mean that
my code is running since I’m not getting any output but small steps work as
well. [Very thankful this is still a socketed BIOS chip and not surface mounted
yet…]
I have some folks helping to get some answers about a number of different
questions from the BIOS development team so maybe I’ll get hooked up with the
correct person.
I posted because it just seems like there’s a void when it comes to finding
information on PEI drivers in general (as opposed to DXE drivers for example).
-Joe Thomas
// Joseph Thomas
// Principal Software Engineer
// Dot Hill Systems
// 2905 NorthWest Blvd., Suite 20
// Plymouth, MN 55441
// 763.226.2640
From: Andrew Fish [mailto:af...@apple.com]
Sent: Monday, December 01, 2014 1:50 PM
To: edk2-devel@lists.sourceforge.net
Subject: Re: [edk2] PEI driver help
On Dec 1, 2014, at 8:48 AM, Joe Thomas
<joe.tho...@dothill.com<mailto:joe.tho...@dothill.com>> wrote:
Folks,
I’m trying to convert/port one of our DXE drivers to PEI (for Recovery support)
but I’m having trouble finding useful information on generating a PEIM module
that can be integrated into a BIOS.
Does anyone have any good pointers/info that might help point the way? Thanks.
Background:
- DXE module being built under Edk_1.xx
- Final output is .DXE or .DXE.ORG<http://dxe.org/> file (as well as
the .efi)
- BIOS is MMTOOL compatible
- Building PEI module w/Edk2
- Output from ‘build’ process is <name>.debug, <name>.dll or
<name>.efi; none are in proper format for use by MMTOOL
Current (test) PEI module is a simple DEBUG() statement and return
EFI_UNSUPPORTED for PeimEntry(). [Using MdeModulePkg/Bus/Pci/IdeBusPei/* as
template files.] MMTOOL seems to like output by GenFfs… GenFfs want’s something
with a PE or TE section such as GenSec outputs. Putting the resulting output
into the BIOS bricks the system… Don’t have a debugger that will tell me what’s
happening (hence trying to start with something that will output a debug
message and exit…)
You can try running VolInfo on the FV that contains your PEIM to see how it got
packaged up.
The DebugLib can have different underlying implementations. Are you sure you
are using a DebugLib instance that is compatible with the platform?
Thanks,
Andrew Fish
Thanks again…
// Joseph Thomas
// Principal Software Engineer
// Dot Hill Systems
// 2905 NorthWest Blvd., Suite 20
// Plymouth, MN 55441
// 763.226.2640
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