Hello Matt, Yes it is for the UP squared board. It seems to me that coreboot writes a pointer at the end of CBFS. The pointer is 0xFF483038 at address 0xEBEFFC. This pointer is wrong. If I manually patch the value 0x48 to 0x44 everything is ok and SeaBIOS finds the CBFS,
Kind regards, Wolfgang Von: Matt DeVillier [mailto:[email protected]] Gesendet: Freitag, 24. April 2020 18:09 An: Wolfgang Kamp - datakamp <[email protected]> Cc: [email protected] Betreff: [coreboot] Re: CBFS pointer problem with SeaBios and Apollo Lake platform On Fri, Apr 24, 2020 at 4:59 AM Wolfgang Kamp - datakamp <[email protected]<mailto:[email protected]>> wrote: Hello Matt, Thank you for your response. I see that SeaBIOS still can’t handle the FMAP structure. The pointer depends on the FMAP layout and this is different to chromium devices. For the UP squared board I did not find any other solution than to set CONFIG_CBFS_LOCATION=0xFFFC0000 and this is for the upsquared board? looking at the fmap, I'm not sure how you calculated that CBFS location to patch the 16M coreboot.rom image at address 0x00EBEFFE with 0x44. Then SeaBIOS will find the CBFS to load the APL VGA BIOS ROM. what does patching 0x00EBEFFE with 0x44 do exactly? Kind regards, Wolfgang Von: Matt DeVillier [mailto:[email protected]<mailto:[email protected]>] Gesendet: Donnerstag, 23. April 2020 17:35 An: Wolfgang Kamp - datakamp <[email protected]<mailto:[email protected]>> Cc: [email protected]<mailto:[email protected]> Betreff: [coreboot] Re: CBFS pointer problem with SeaBios and Apollo Lake platform Apollolake should work with: CONFIG_CBFS_LOCATION=0xfffb1000 # CONFIG_HARDWARE_IRQ is not set That's what I use for SeaBIOS as a legacy boot payload on ChromeOS devices, but the CBFS address will be the same if using upstream coreboot regards, Matt On Thu, Apr 23, 2020 at 3:24 AM Wolfgang Kamp - datakamp <[email protected]<mailto:[email protected]>> wrote: Hello, Am I correct that the problem still exists that SeaBios can’t find the CBFS in apl platform? Kind regards, Wolfgang Kamp _______________________________________________ coreboot mailing list -- [email protected]<mailto:[email protected]> To unsubscribe send an email to [email protected]<mailto:[email protected]>
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