soc/intel/common: Add CPU related APIs

The patch defines below APIs :
cpu_is_hybrid_supported() : Check whether CPU is hybrid CPU or not.
cpu_get_bus_frequency() : Get CPU's bus frequency in MHz
cpu_get_max_non_turbo_ratio() : Get CPU's max non-turbo ratio
cpu_get_cpu_type() : Get CPU type. The function must be called if
executing CPU is hybrid.

TEST=Verified the APIs on the Brya board

Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Change-Id: I680f43952ab4abce6e342206688ad32814970a91
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59124
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/cpulib.h b/src/soc/intel/common/block/include/intelblocks/cpulib.h
index 7e3deb0fd4..094acebd54 100644
--- a/src/soc/intel/common/block/include/intelblocks/cpulib.h
+++ b/src/soc/intel/common/block/include/intelblocks/cpulib.h
@@ -11,6 +11,21 @@
  */
 void cpu_set_max_ratio(void);
 
+/* Get CPU bus frequency in MHz */
+u32 cpu_get_bus_frequency(void);
+
+/* Get CPU's max non-turbo ratio */
+u8 cpu_get_max_non_turbo_ratio(void);
+
+/* Check if CPU is hybrid CPU or not */
+bool cpu_is_hybrid_supported(void);
+
+/*
+ * Returns type of CPU that executing the function. It returns 0x20
+ * if CPU is atom, otherwise 0x40 if CPU is CORE. The API must be called
+ * if CPU is hybrid.
+ */
+uint8_t cpu_get_cpu_type(void);
 /*
  * Get the TDP Nominal Ratio from MSR 0x648 Bits 7:0.
  */