Re: [coreboot] Coreboot for Apollolake

[Antony AbeePrakash X V]

Hi All,

Thanks for the response , we extracted the flash descriptor from the BIOS Image using the ifdtool as below

./ifdtool -x ~/<BIOS_IMAGE>.bin

Peculiar firmware descriptor, assuming Ibex Peak compatibility.
  Flash Region 0 (Flash Descriptor): 00000000 - 00000fff
  Flash Region 1 (BIOS): 00001000 - 00efefff
  Flash Region 2 (Intel ME): 07fff000 - 00000fff (unused)
                                                                 Flash Region 3 (GbE): 07fff000 - 00000fff (unused)
                                                                  Flash Region 4 (Platform Data): 07fff000 - 00000fff (unused)
                                                                  Flash Region 5 (Reserved): 00eff000 - 00ffefff
                                                                  Flash Region 6 (Reserved): 07fff000 - 00000fff (unused)
                                                                  Flash Region 7 (Reserved): 07fff000 - 00000fff (unused)
                                                                  Flash Region 8 (EC): 07fff000 - 00000fff (unused)

when we compile the core boot with the  Flash Descriptor , we are getting the below error

CBFS       fallback/postcar
    CBFS       fallback/dsdt.aml
    CBFS       fallback/payload
    DD         Adding Intel Firmware Descriptor
    IFDTOOL    Unlocking Management Engine
Platform is: aplk
File build/coreboot.pre is 2097152 bytes
Peculiar firmware descriptor, assuming Ibex Peak compatibility.
Writing new image to build/coreboot.pre.new
    CBFS       coreboot.rom
    CBFSLAYOUT  coreboot.rom

This is a legacy image composed entirely of a single CBFS.
make: *** [build/coreboot.rom] Error 1
make: *** Deleting file `build/coreboot.rom'

Could you please point out where it went wrong , have we missed something

Thanks & Regards,
Antony
From: David Hendricks [mailto:[e-mail]]
Sent: Tuesday, September 18, 2018 8:48 PM
To: Antony AbeePrakash X V 
Cc: Coreboot 
Subject: Re: [coreboot] Coreboot for Apollolake

Hi Antony,
There are a few components which compose a complete firmware image for Intel platforms: coreboot, FSP, microcode, management engine blob, and flash descriptor are the most common ones.

For the flash descriptor, refer to the Apollo Lake SoC SPI and signed Master Image Profile (SMIP) Programming Guide, docid 559702. Chapter 4 explains the flash descriptor for Apollo Lake in detail.

Once you have created a flash descriptor, you can add it to the firmware image using coreboot's config system (under "Chipset").

On Tue, Sep 18, 2018 at 1:43 AM Antony AbeePrakash X V <[e-mail]> wrote:
Hi,

We would like to build coreboot image for Apollo lake platform. We are using

*   Coreboot-4.8.1
  *   Apollo lake Intel FSP_2_0

We have built the coreboot source and created coreboot.rom image with the below warning message:
                ** WARNING **
coreboot will be built without an Intel Firmware Descriptor.
Never write a complete coreboot.rom without an IFD to your
board's flash chip! You can use flashrom's IFD or layout
parameters to flash only to the BIOS region.

Is the coreboot.rom image is enough to flash ? Could you please provide feedback on this ?

Thanks & Regards,
Antony

L&T Technology Services Ltd

www.LntTechservices.comhttp://www.lnttechservices.com/

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