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>
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 @@
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});
+ }
+}