[coreboot] Mohon Peak, Memtest86+ does not start

[Stefan Reinauer]

* Kuzmichev Viktor <kuzmichevviktorv at gmail.com> [150120 14:31]:
> Hello,
> 
> I'm trying to load Memtest86+ on the Mohon Peak reference board from
> CBFS and it fails.
> My primary payload is SeaBIOS. Memtest is added using cbfstool, so
> the layout of my ROM file is as follows:
> 
> $ ./build/cbfstool build/coreboot.rom print
> coreboot.rom: 8192 kB, bootblocksize 1024, romsize 8388608, offset 0x600000
> alignment: 64 bytes, architecture: x86
> 
> Name                           Offset     Type         Size
> cmos_layout.bin                0x600000   cmos_layout  1352
> fallback/romstage              0x600580   stage        26616
> fallback/ramstage              0x606dc0   stage        60446
> fallback/payload               0x615a40   payload      55799
> config                         0x623480   raw          4323
> revision                       0x6245c0   raw          714
> img/Memtest86+                 0x6248c0   payload      225028
> (empty)                        0x65b800   null         1001368
> mrc.cache                      0x74ffc0   (unknown)    65536
> cpu_microcode_blob.bin         0x760000   microcode    83968
> (empty)                        0x774840   null         46936
> fsp.bin                        0x77ffc0   (unknown)    372736
> (empty)                        0x7db000   null         150424
> 
> I've tried versions 4.20 and 5.01. Memtest86+ v4.20 just hangs, here
> is output of SeaBIOS trying to load it:
> Trying CBFS
> Booting from CBFS...
> Run img/Memtest86+
> Segment 41544144 194420 at 0xffe24920 -> 194420 at 0x00000000
> No compression
> 
> And then nothing. Memtest86+ v5.01 goes a bit further, SeaBIOS finds
> its entry point:
> Trying CBFS
> Booting from CBFS...
> Run img/Memtest86+
> Segment 41544144 224972 at 0xffe24920 -> 224972 at 0x00000000
> No compression
> Calling addr 0x00010000

It looks like in both cases memtest86+ is loaded at address 0x00000000
which will overwrite a bunch of memory, including the coreboot tables.
Looks like the memtest86+ elf binary needs to specify a load address.

Stefan