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-rw-r--r--src/soc/intel/tigerlake/chip.h12
-rw-r--r--src/soc/intel/tigerlake/romstage/fsp_params_tgl.c12
2 files changed, 24 insertions, 0 deletions
diff --git a/src/soc/intel/tigerlake/chip.h b/src/soc/intel/tigerlake/chip.h
index 9fc70f8a46..5e010bda59 100644
--- a/src/soc/intel/tigerlake/chip.h
+++ b/src/soc/intel/tigerlake/chip.h
@@ -285,6 +285,18 @@ struct soc_intel_tigerlake_config {
* This mode makes FSP detect Optane and NVME and set PCIe lane mode
* accordingly */
uint8_t HybridStorageMode;
+
+ /*
+ * Override CPU flex ratio value:
+ * CPU ratio value controls the maximum processor non-turbo ratio.
+ * Valid Range 0 to 63.
+ * In general descriptor provides option to set default cpu flex ratio.
+ * Default cpu flex ratio 0 ensures booting with non-turbo max frequency.
+ * That's the reason FSP skips cpu_ratio override if cpu_ratio is 0.
+ * Only override CPU flex ratio to not boot with non-turbo max.
+ */
+ uint8_t cpu_ratio_override;
+
};
typedef struct soc_intel_tigerlake_config config_t;
diff --git a/src/soc/intel/tigerlake/romstage/fsp_params_tgl.c b/src/soc/intel/tigerlake/romstage/fsp_params_tgl.c
index 3872b61cf7..c5629a51c6 100644
--- a/src/soc/intel/tigerlake/romstage/fsp_params_tgl.c
+++ b/src/soc/intel/tigerlake/romstage/fsp_params_tgl.c
@@ -15,9 +15,11 @@
#include <assert.h>
#include <console/console.h>
+#include <cpu/x86/msr.h>
#include <fsp/util.h>
#include <soc/gpio_soc_defs.h>
#include <soc/iomap.h>
+#include <soc/msr.h>
#include <soc/pci_devs.h>
#include <soc/romstage.h>
#include <soc/soc_chip.h>
@@ -38,6 +40,16 @@ static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
m_cfg->UserBd = BOARD_TYPE_ULT_ULX;
m_cfg->RMT = config->RMT;
+ /* CpuRatio Settings */
+ if (config->cpu_ratio_override) {
+ m_cfg->CpuRatio = config->cpu_ratio_override;
+ } else {
+ /* Set CpuRatio to match existing MSR value */
+ msr_t flex_ratio;
+ flex_ratio = rdmsr(MSR_FLEX_RATIO);
+ m_cfg->CpuRatio = (flex_ratio.lo >> 8) & 0xff;
+ }
+
for (i = 0; i < ARRAY_SIZE(config->PcieRpEnable); i++) {
if (config->PcieRpEnable[i])
mask |= (1 << i);