[coreboot-gerrit] Change in coreboot[master]: cpu/intel/model_206ax: Get CPU frequencies for SMBIOS type 4

[Michał Żygowski (Code Review)]

Michał Żygowski has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/47058 )

Change subject: cpu/intel/model_206ax: Get CPU frequencies for SMBIOS type 4
......................................................................

cpu/intel/model_206ax: Get CPU frequencies for SMBIOS type 4

Calculate the frequencies based on the appropriate MSRs adn pass them to
SMBIOS tables generator. Ivybridge microarchitecture does not yet
implement CPUID 16H leaf to obtain the required frequencies.

TEST=Intel Core i7-3770, TianoCore UEFI payload displays the CPU
frequency correctly equal 3.4GHz in Boot Manager Menu, dmidecode shows
correct frequencies according to Intel ARK, 3.4Ghz base and 3.9GHz turbo

Signed-off-by: Michał Żygowski 
Change-Id: Iefbae6111d39107eacac7e61654311646c6981eb
---
M src/cpu/intel/model_206ax/model_206ax_init.c
1 file changed, 20 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/47058/1

diff --git a/src/cpu/intel/model_206ax/model_206ax_init.c b/src/cpu/intel/model_206ax/model_206ax_init.c
index 7fb412c..2afbfee 100644
--- a/src/cpu/intel/model_206ax/model_206ax_init.c
+++ b/src/cpu/intel/model_206ax/model_206ax_init.c
@@ -18,6 +18,7 @@
 #include "chip.h"
 #include <cpu/intel/smm_reloc.h>
 #include <cpu/intel/common/common.h>
+#include <smbios.h>

/*
  * List of supported C-states in this processor
@@ -360,6 +361,25 @@
           ((perf_ctl.lo >> 8) & 0xff) * SANDYBRIDGE_BCLK);
 }

+unsigned int smbios_cpu_get_max_speed_mhz(void)
+{
+	msr_t msr;
+	msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
+	return (msr.lo & 0xff) * SANDYBRIDGE_BCLK;
+}
+
+unsigned int smbios_cpu_get_current_speed_mhz(void)
+{
+	msr_t msr;
+	msr = rdmsr(MSR_PLATFORM_INFO);
+	return ((msr.lo >> 8) & 0xff) * SANDYBRIDGE_BCLK;
+}
+
+unsigned int smbios_processor_external_clock(void)
+{
+	return SANDYBRIDGE_BCLK;
+}
+
 static void configure_mca(void)
 {
    msr_t msr;