Hi Michal, Thank you very much for your reply.
You are right. I have soldered down memory. No dimm slot. In what routine should I configure RAM ? Where can I see a sample code ? >From the RAM vendor I got the following table: Part Number Byte Number Byte Description Byte Value MT4KTF25664HZ-1G9P1 0 DDR3-CRC RANGE; EEPROM BYTES; BYTES USED 92 MT4KTF25664HZ-1G9P1 1 DDR3-SPD REVISON 13 MT4KTF25664HZ-1G9P1 2 DDR3-DRAM DEVICE TYPE 0B MT4KTF25664HZ-1G9P1 3 DDR3-MODULE TYPE (FORM FACTOR) 3 .... Is it possible to use FSP but not for RAM setup ? How ? FSP has many features which I want to use. I do not want to write all by myself. Best regards, Zvika On Tue, Feb 19, 2019 at 12:27 PM Michal Zygowski <[email protected]> wrote: > On 18.02.2019 20:28, Zvi Vered wrote: > > Hello, > > Hi Zvika, > > > I suspect the RAM on my bay-trail module has no SPD interface. > Can Intel's FSP work without SPD ? > > I tried to run decode-dimms with vendor's bios and got: > No EEPROM found, try loading the eeprom or at24 module > > It looks like You have a platform with soldered down memory. No DIMM > slot, am I right? > > > In this case the is no EEPROM which would hold the SPD data. Typically the > SPD should be obtained from hardware vendor/platform vendor. > > I ran an FSP with debug info and got: > C0.D0: SPD not present. > C1.D0: SPD not present. > > FSP won't run without SPD, because SPD data is crucial for memory > training. It contains timing values, memory hierarchy and other memory > characteristics. The memory training process is so complex that it requires > the right parameters, which can be retrieved from SPD. The SPD content is > highly dependent on memory module design, in Your case the memory chips > layout probably, PCB paths length etc. > > Thank you, > Zvika > > Best regards, > Michał > > > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] > > -- > Michał Żygowski > Fimrware Engineerhttp://3mdeb.com | @3mdeb_com > > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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