coreboot org wrote:
| https://review.coreboot.org/23376 | Changed 2019-06-29 | Paul Menzel | "mb/lenovo/x60: Use big enough type for left-shift"
Commit 399b6c11efaff64cb86a879dc9047a97538e790f moved the relevant code to src/southbridge/intel/i82801gx/early_init.c and it looks like current master may still need the fix.
//Peter