summaryrefslogtreecommitdiff
path: root/src/soc/intel/apollolake/cpu.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/soc/intel/apollolake/cpu.c')
-rw-r--r--src/soc/intel/apollolake/cpu.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/src/soc/intel/apollolake/cpu.c b/src/soc/intel/apollolake/cpu.c
index e67842c369..bd5cff50a9 100644
--- a/src/soc/intel/apollolake/cpu.c
+++ b/src/soc/intel/apollolake/cpu.c
@@ -25,11 +25,32 @@
#include <cpu/x86/mtrr.h>
#include <device/device.h>
#include <device/pci.h>
+#include <reg_script.h>
#include <soc/cpu.h>
+#include <soc/iomap.h>
#include <soc/smm.h>
+static const struct reg_script core_msr_script[] = {
+ /* Enable C-state and IO/MWAIT redirect */
+ REG_MSR_WRITE(MSR_PMG_CST_CONFIG_CONTROL,
+ (PKG_C_STATE_LIMIT_C2_MASK | CORE_C_STATE_LIMIT_C10_MASK
+ | IO_MWAIT_REDIRECT_MASK | CST_CFG_LOCK_MASK)),
+ /* Power Management I/O base address for I/O trapping to C-states */
+ REG_MSR_WRITE(MSR_PMG_IO_CAPTURE_BASE,
+ (ACPI_PMIO_CST_REG | (PMG_IO_BASE_CST_RNG_BLK_SIZE << 16))),
+ /* Disable C1E */
+ REG_MSR_RMW(MSR_POWER_CTL, ~0x2, 0),
+ REG_SCRIPT_END
+};
+
+static void soc_core_init(device_t cpu)
+{
+ /* Set core MSRs */
+ reg_script_run(core_msr_script);
+}
+
static struct device_operations cpu_dev_ops = {
- .init = DEVICE_NOOP,
+ .init = soc_core_init,
};
static struct cpu_device_id cpu_table[] = {