intel/common/cpulib: Add API to configure MCA

Add mca_configure() API to configure Intel Machine Check
Architecture (MCA).

Change-Id: I5e88c7527ce350824e48892caa978b2b78f1de20
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21239
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/common/block/cpu/cpulib.c

@@ -296,3 +296,21 @@ uint32_t cpu_get_max_turbo_ratio(void)
 	msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
 	return msr.lo & 0xff;
 }
+
+void mca_configure(void)
+{
+	msr_t msr;
+	int i;
+	int num_banks;
+
+	msr = rdmsr(IA32_MCG_CAP);
+	num_banks = msr.lo & 0xff;
+	msr.lo = msr.hi = 0;
+	for (i = 0; i < num_banks; i++) {
+		/* Clear the machine check status */
+		wrmsr(IA32_MC0_STATUS + (i * 4), msr);
+		/* Initialize machine checks */
+		wrmsr(IA32_MC0_CTL + i * 4,
+			(msr_t) {.lo = 0xffffffff, .hi = 0xffffffff});
+	}
+}

src/soc/intel/common/block/include/intelblocks/cpulib.h

@@ -156,4 +156,7 @@ uint32_t cpu_get_power_max(void);
  */
 uint32_t cpu_get_max_turbo_ratio(void);
 
+/* Configure Machine Check Architecture support */
+void mca_configure(void);
+
 #endif	/* SOC_INTEL_COMMON_BLOCK_CPULIB_H */