/* * Store the initial timestamp for booting in mmx registers. This works * because the bootblock isn't being compiled with MMX support so mm0 and * mm1 will be preserved into romstage. */ .code32 .global stash_timestamp stash_timestamp: /* Save the BIST value */ movl %eax, %ebp finit rdtsc movd %eax, %mm0 movd %edx, %mm1 /* Restore the BIST value to %eax */ movl %ebp, %eax