diff options
Diffstat (limited to 'src/soc/intel/apollolake/cpu.c')
| -rw-r--r-- | src/soc/intel/apollolake/cpu.c | 23 |
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[] = { |