diff options
Diffstat (limited to 'src/cpu/intel/common')
| -rw-r--r-- | src/cpu/intel/common/Kconfig | 3 | ||||
| -rw-r--r-- | src/cpu/intel/common/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/cpu/intel/common/voltage.c | 12 |
3 files changed, 16 insertions, 0 deletions
diff --git a/src/cpu/intel/common/Kconfig b/src/cpu/intel/common/Kconfig index 01f2721b59..7f9033cf65 100644 --- a/src/cpu/intel/common/Kconfig +++ b/src/cpu/intel/common/Kconfig @@ -32,6 +32,9 @@ config CPU_INTEL_COMMON_TIMEBASE endif +config CPU_INTEL_COMMON_VOLTAGE + bool + config CPU_INTEL_COMMON_SMM bool default y if CPU_INTEL_COMMON diff --git a/src/cpu/intel/common/Makefile.inc b/src/cpu/intel/common/Makefile.inc index 8b81a121d3..530ecee009 100644 --- a/src/cpu/intel/common/Makefile.inc +++ b/src/cpu/intel/common/Makefile.inc @@ -1,5 +1,6 @@ ramstage-$(CONFIG_CPU_INTEL_COMMON) += common_init.c ramstage-$(CONFIG_CPU_INTEL_COMMON) += hyperthreading.c +ramstage-$(CONFIG_CPU_INTEL_COMMON_VOLTAGE) += voltage.c ifeq ($(CONFIG_CPU_INTEL_COMMON_TIMEBASE),y) bootblock-y += fsb.c diff --git a/src/cpu/intel/common/voltage.c b/src/cpu/intel/common/voltage.c new file mode 100644 index 0000000000..38951a06db --- /dev/null +++ b/src/cpu/intel/common/voltage.c @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <cpu/x86/msr.h> +#include <smbios.h> + +/* This is not an architectural MSR. */ +#define MSR_PERF_STATUS 0x198 + +unsigned int smbios_cpu_get_voltage(void) +{ + return (rdmsr(MSR_PERF_STATUS).hi & 0xffff) * 10 / 8192; +} |