7f822a3368
This patch adds support for x86-64 to the rdtsc() function, allowing it to correctly read the Time Stamp Counter (TSC) on both 32-bit and 64-bit x86 architectures. BUG=b:242829490, b:351851626 TEST=Builds and boots on google/rex0 and google/rex64 systems and manually verified correct TSC readings on x86-32 and x86-64 hardware. Change-Id: I0afac3db2e82a245a37c2e5cf2302bf1dad62c01 Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83414 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>