Hey Trammell, congratulations ! I guess you are releasing the coreboot payload at the 33c3 ? Could you please submit a bug report at ticket.coreboot.org for that issue.
Best Regards Philipp On 10/06/2016 01:25 AM, Trammell Hudson wrote: > On Wed, Oct 05, 2016 at 03:19:11PM -0500, Aaron Durbin wrote: >> On Wed, Oct 5, 2016 at 3:08 PM, Trammell Hudson <[email protected]> wrote: >>> CBFS: 'Master Header Locator' located CBFS at [a00100:ffffc0) >>> CBFS: Locating 'fallback/ramstage' >>> CBFS: Found @ offset afc0 size 12e29 >>> Decompressing stage fallback/ramstage @ 0x7abbffc0 (743408 bytes) >>> Loading module at 7abc0000/7abc0000 with entry 7abc0000. filesize: 0x28d88 >>> memsize: 0xb57b0 >>> Processing 2472 relocs. Offset value of 0x7aac0000 >>> src/arch/x86/boot.c:223: jumping to 7abc0000 >>> >>> (and then it crashes) >> You can try writing characters to the serial console in >> src/arch/x86/c_start.S. Do you have the ability to read post codes? >> That's the best way to know how deep you are getting through c_start.S >> in the jump to ramstage. > Thanks to a servo board, I can read the port 80 codes and verified > that the instruction causing the problem is the lgdt / jmp combo > in c_start.S: > > _start: > cli > lgdt %cs:gdtaddr > #ifndef __x86_64__ > ljmp $0x10, $1f > #endif > 1: movl $0x18, %eax // <---- never reached with relocatable > > >> [...] >> I'm not sure why it's crashing (or just not spitting anything out). >> You could certainly try disabling RELOCATABLE_RAMSTAE and see if that >> fairs better. > It looks like CONFIG_SOC_INTEL_SKYLAKE forces relocatable ramstage; > I've modified src/soc/intel/skylake/Kconfig to disable it and now > it makes it all the way into the payload. > > And by adding the i915 driver to the Linux payload, it is able to > bring up the console in a miniscule font! > > https://www.flickr.com/photos/osr/30026718432/in/photostream/lightbox/ > > I'm declaring today a huge success! >
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