haswell: use tsc for udelay()
Instead of using the local apic timer for udelay() use the tsc.
That way SMM, romstage, and ramstage all use the same delay
functionality.
Change-Id: I024de5af01eb5de09318e13d0428ee98c132f594
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/3169
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig
index 13861f9..152059f 100644
--- a/src/cpu/intel/haswell/Kconfig
+++ b/src/cpu/intel/haswell/Kconfig
@@ -8,7 +8,8 @@
def_bool y
select SMP
select SSE2
- select UDELAY_LAPIC
+ select UDELAY_TSC
+ select TSC_CONSTANT_RATE
select SMM_TSEG
select SMM_MODULES
select RELOCATABLE_MODULES