cpu/intel/common: Add CPU_INTEL_COMMON_TIMEBASE

To add a common tsc_freq_mhz() implementation, we need
to guard againts soc-specific duplicate definitions.

Change-Id: I37a34651d9e7d823ad5689d30739294358a97e31
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31341
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: David Guckian
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/intel/common/Kconfig

@@ -19,4 +19,7 @@ config SET_IA32_FC_LOCK_BIT
 	  However, leaving the lock bit unset will break Windows' detection of
 	  VMX support and built-in virtualization features like Hyper-V.
 
+config CPU_INTEL_COMMON_TIMEBASE
+	bool
+
 endif

src/cpu/intel/common/Makefile.inc

@@ -1,5 +1,10 @@
 ramstage-y += common_init.c
-romstage-$(CONFIG_UDELAY_LAPIC) += fsb.c
-ramstage-$(CONFIG_UDELAY_LAPIC) += fsb.c
-postcar-$(CONFIG_UDELAY_LAPIC) += fsb.c
+
+ifeq ($(CONFIG_CPU_INTEL_COMMON_TIMEBASE),y)
+bootblock-y += fsb.c
+verstage-y += fsb.c
+romstage-y += fsb.c
+postcar-y += fsb.c
+ramstage-y += fsb.c
 smm-y += fsb.c
+endif

src/cpu/intel/fsp_model_406dx/Kconfig

@@ -33,6 +33,7 @@ config CPU_SPECIFIC_OPTIONS
 	select TSC_SYNC_MFENCE
 	select LAPIC_MONOTONIC_TIMER
 	select CPU_INTEL_COMMON
+	select CPU_INTEL_COMMON_TIMEBASE
 	select NO_SMM
 
 	# Microcode header files are delivered in FSP package

src/cpu/intel/model_1067x/Kconfig

@@ -10,3 +10,4 @@ config CPU_INTEL_MODEL_1067X
 	select TSC_SYNC_MFENCE
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select CPU_INTEL_COMMON
+	select CPU_INTEL_COMMON_TIMEBASE

src/cpu/intel/model_106cx/Kconfig

@@ -13,6 +13,7 @@ config CPU_INTEL_MODEL_106CX
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select SERIALIZED_SMM_INITIALIZATION
 	select CPU_INTEL_COMMON
+	select CPU_INTEL_COMMON_TIMEBASE
 
 if CPU_INTEL_MODEL_106CX
 

src/cpu/intel/model_6ex/Kconfig

@@ -11,3 +11,4 @@ config CPU_INTEL_MODEL_6EX
 	select TSC_SYNC_MFENCE
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select CPU_INTEL_COMMON
+	select CPU_INTEL_COMMON_TIMEBASE

src/cpu/intel/model_6fx/Kconfig

@@ -11,3 +11,4 @@ config CPU_INTEL_MODEL_6FX
 	select TSC_SYNC_MFENCE
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select CPU_INTEL_COMMON
+	select CPU_INTEL_COMMON_TIMEBASE