Re: [coreboot] Rangeley FSP reports "Err[24]: GetSet Value exceeds limits" during memory init

[Agrain Patrick]

Hello Andy,

We were also facing such an issue when developing our Rangeley-based CPU board (with DIMM modules).
This message was due to a wrong polarization on the DATA_MASK pin.

The pb with this message is that it is displayed in every case of failure during the DDR test.
A good way to reduce the possibility is to ask your Intel contact to provide you with a verbose FSP. That way, you may see at which part of the test you get the failure.

Hope it helps.
Best regards,
Patrick Agrain

De : coreboot [mailto:[e-mail]] De la part de Zoran Stojsavljevic
Envoyé : dimanche 22 janvier 2017 14:15
À : Andy Knowles
Cc : [e-mail]
Objet : Re: [coreboot] Rangeley FSP reports "Err[24]: GetSet Value exceeds limits" during memory init

Hello Andy,

I would advise to you to try the same coreboot with DIMM or SIMM INTEL Rangeley based CRB, and see if this does work, for some reason? Couple of experiments more with different CRBs with different memory configurations would not make too much headaches, don't you think?

If you do not use BCT tool, the following is true. You should use Binary Configuration TOOL (BCT) to change some configuration parameters for Rangeley (you should have in Rangeley FSP package also included BCT)!

As previously discussed, even though Intel FSP is a binary file, it needs a provision to customize its internal states and features; therefore, it has reserved a data region inside the binary for customization. The data area also contains a couple of platform-specific parameters that Intel FSP would otherwise have no knowledge about, or would initialize the board with default values. The Boot Setting File (BSF) plays an important role for this purpose. It is basically a text file that contains firmware internal settings associated with the board; for example, the SMBUS (System Management Bus) address of a SPD (Serial Presence Detect) ROM on a DIMM (Dual Inline Memory Module) is one of the data in the BSF.

$gPlatformFspPkgTokenSpaceGuid_PcdMrcInitSPDAddr1 1 byte $_DEFAULT_ = 0xA0
$gPlatformFspPkgTokenSpaceGuid_PcdMrcInitSPDAddr2 1 byte $_DEFAULT_ = 0xA2

The data in BSF is represented in a GUI-based tool, which allows developers to visualize the meaning of each component in BSF. With the GUI and BSF, it is collectively called a Binary Configuration Tool (BCT). There are three versions of BCT: one runs under Windows, one runs under Linux, and the third is a command-line option under Linux.

Please, search for the book called:  Embedded Firmware Solutions [describing INTEL FSP]...

And search for Chapter 3. There, everything is explicitly well explained/organized.

Hope this helps,
Zoran

On Fri, Jan 20, 2017 at 1:47 PM, Andy Knowles <[e-mail]> wrote:
I’m trying to bring up an Intel Rangeley based prototype board using coreboot and Intel FSP. During FspInitEntry, FSP prints:

Err[24]: GetSet Value exceeds limits

to serial debug and halts. Does anyone know what this means?

I’m using the Memory Down option in the FSP and filling in the MEM_DOWN_DIMM_CONFIG structure in mainboard/…/romstage.c
I can see that the FSP is reading and validating this structure, as changing the ram speed has an effect on memory clock frequency, and if I put in invalid values the FSP will complain. I’ve tried reducing memory speed, disabling ECC, disabling channel 1 but I always get the same error.

Does anyone else have any experience with Memory Down on Rangeley?

Andy Knowles