Add functions to query CPU information, needed for ACPI.
Signed-off-by: Simon Glass <[email protected]>
---
arch/x86/cpu/intel_common/cpu.c | 59 +++++++++++++++++++++++++++++++
arch/x86/include/asm/cpu_common.h | 31 ++++++++++++++++
2 files changed, 90 insertions(+)
diff --git a/arch/x86/cpu/intel_common/cpu.c b/arch/x86/cpu/intel_common/cpu.c
index 4d093a5391..106ff41e23 100644
--- a/arch/x86/cpu/intel_common/cpu.c
+++ b/arch/x86/cpu/intel_common/cpu.c
@@ -8,6 +8,7 @@
*/
#include <common.h>
+#include <acpigen.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
@@ -226,3 +227,61 @@ void cpu_set_eist(bool eist_status)
msr.lo &= ~MISC_ENABLE_ENHANCED_SPEEDSTEP;
msr_write(MSR_IA32_MISC_ENABLE, msr);
}
+
+int cpu_get_coord_type(void)
+{
+ return HW_ALL;
+}
+
+uint32_t cpu_get_min_ratio(void)
+{
+ msr_t msr;
+ /* Get bus ratio limits and calculate clock speeds */
+ msr = msr_read(MSR_PLATFORM_INFO);
+
+ return (msr.hi >> 8) & 0xff; /* Max Efficiency Ratio */
+}
+
+uint32_t cpu_get_max_ratio(void)
+{
+ u32 ratio_max;
+ msr_t msr;
+
+ if (cpu_config_tdp_levels()) {
+ /* Set max ratio to nominal TDP ratio */
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ ratio_max = msr.lo & 0xff;
+ } else {
+ msr = msr_read(MSR_PLATFORM_INFO);
+ /* Max Non-Turbo Ratio */
+ ratio_max = (msr.lo >> 8) & 0xff;
+ }
+ return ratio_max;
+}
+
+uint32_t cpu_get_bus_clock(void)
+{
+ /* CPU bus clock is set by default here to 100MHz.
+ * This function returns the bus clock in KHz.
+ */
+ return INTEL_BCLK_MHZ * 1000;
+}
+
+uint32_t cpu_get_power_max(void)
+{
+ msr_t msr;
+ int power_unit;
+
+ msr = msr_read(MSR_PKG_POWER_SKU_UNIT);
+ power_unit = 2 << ((msr.lo & 0xf) - 1);
+ msr = msr_read(MSR_PKG_POWER_SKU);
+ return (msr.lo & 0x7fff) * 1000 / power_unit;
+}
+
+uint32_t cpu_get_max_turbo_ratio(void)
+{
+ msr_t msr;
+
+ msr = msr_read(MSR_TURBO_RATIO_LIMIT);
+ return msr.lo & 0xff;
+}
diff --git a/arch/x86/include/asm/cpu_common.h
b/arch/x86/include/asm/cpu_common.h
index cdd99a90b7..c3f699ffd3 100644
--- a/arch/x86/include/asm/cpu_common.h
+++ b/arch/x86/include/asm/cpu_common.h
@@ -128,4 +128,35 @@ void cpu_set_eist(bool eist_status);
*/
void cpu_set_p_state_to_turbo_ratio(void);
+/*
+ * cpu_get_bus_clock returns the bus clock frequency in KHz.
+ * This is the value the clock ratio is multiplied with.
+ */
+uint32_t cpu_get_bus_clock(void);
+
+int cpu_get_coord_type(void);
+
+/*
+ * cpu_get_min_ratio returns the minimum frequency ratio that is supported
+ * by this processor
+ */
+uint32_t cpu_get_min_ratio(void);
+
+/*
+ * cpu_get_max_ratio returns the nominal TDP ratio if available or the
+ * maximum non turbo frequency ratio for this processor
+ */
+uint32_t cpu_get_max_ratio(void);
+
+/*
+ * cpu_get_power_max calculates CPU TDP in mW
+ */
+uint32_t cpu_get_power_max(void);
+
+/*
+ * cpu_get_max_turbo_ratio returns the maximum turbo ratio limit for the
+ * processor
+ */
+uint32_t cpu_get_max_turbo_ratio(void);
+
#endif
--
2.25.0.341.g760bfbb309-goog
