x86: apl: Add core init for the SoC

Set up MSRs required for Apollo Lake. This enables Linux to use the
timers correctly. Also write the fixed MSRs for this platform.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/x86/cpu/intel_common/cpu.c b/arch/x86/cpu/intel_common/cpu.c
index 39aa0f6..a51bf86 100644
--- a/arch/x86/cpu/intel_common/cpu.c
+++ b/arch/x86/cpu/intel_common/cpu.c
@@ -306,3 +306,22 @@ int cpu_get_cores_per_package(void)
 
 	return cores;
 }
+
+void cpu_mca_configure(void)
+{
+	msr_t msr;
+	int i;
+	int num_banks;
+
+	msr = msr_read(MSR_IA32_MCG_CAP);
+	num_banks = msr.lo & 0xff;
+	msr.lo = 0;
+	msr.hi = 0;
+	for (i = 0; i < num_banks; i++) {
+		/* Clear the machine check status */
+		msr_write(MSR_IA32_MC0_STATUS + (i * 4), msr);
+		/* Initialise machine checks */
+		msr_write(MSR_IA32_MC0_CTL + i * 4,
+			  (msr_t) {.lo = 0xffffffff, .hi = 0xffffffff});
+	}
+}