<div dir="ltr">Hi Experts,<div><br></div><div>On Intel Leafhill board grub fails to find cbfsdisk. We tried to debug and found that cbfs header address validation fails.</div><div><br></div><div><p class="MsoNormal"><span style="font-size:9.5pt;font-family:arial,sans-serif;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">According to<span class="gmail-apple-converted-space"> </span></span><a href="https://github.com/mrnuke/coreboot/blob/master/documentation/cbfs.txt" target="_blank"><span style="font-size:9.5pt;font-family:arial,sans-serif;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">https://github.com/mrnuke/coreboot/blob/master/documentation/cbfs.txt</span></a><span style="font-size:9.5pt;font-family:arial,sans-serif;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">,</span><span style="font-size:9.5pt;font-family:arial,sans-serif"><br>
<span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">"A pointer to the location of the header
will be located at offset -4 </span><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">from the end of the ROM. This translates to
address 0xFFFFFFFC on a normal x86 system. The pointer will be to physical
memory somewhere between - 0xFFFFB000 and 0xFFFFFFF0". <span></span></span></span></p><p class="MsoNormal"><span style="font-size:9.5pt;font-family:arial,sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><br></span></span></p><p class="MsoNormal"><span style="font-size:9.5pt;font-family:arial,sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">We checked the coreboot.rom in hex editor and address in last 4 bytes</span></span><span style="font-size:12.6667px"> is all ones (FFFFFFFF) as a result grub is not able to find cbfs header.</span></p><p class="MsoNormal"><span style="font-size:12.6667px"><br></span></p><p class="MsoNormal"><span style="font-size:12.6667px">We have earlier used coreboot on baytrail and in the coreboot.rom cbfs header address in last 4 byte was a valid pointer.</span></p><p class="MsoNormal"><span style="font-size:12.6667px"><br></span></p><p class="MsoNormal"><span style="font-size:12.6667px">What is the location grub can find cbfs header on this board?</span></p></div><div><br></div></div>