x86: Move common Intel CPU info code into a function
Add cpu_intel_get_info() to find out the CPU info on modern Intel CPUs.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: add parameter and return value descriptions]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/cpu_common.h b/arch/x86/include/asm/cpu_common.h
index 4c91a5d..5e398be 100644
--- a/arch/x86/include/asm/cpu_common.h
+++ b/arch/x86/include/asm/cpu_common.h
@@ -8,6 +8,8 @@
#define IA32_PERF_CTL 0x199
+struct cpu_info;
+
/**
* cpu_common_init() - Set up common CPU init
*
@@ -31,4 +33,18 @@
*/
int cpu_set_flex_ratio_to_tdp_nominal(void);
+/**
+ * cpu_intel_get_info() - Obtain CPU info for Intel CPUs
+ *
+ * Most Intel CPUs use the same MSR to obtain the clock speed, and use the same
+ * features. This function fills in these values, given the value of the base
+ * clock in MHz (typically this should be set to 100).
+ *
+ * @info: cpu_info struct to fill in
+ * @bclk_mz: the base clock in MHz
+ *
+ * @return 0 always
+ */
+int cpu_intel_get_info(struct cpu_info *info, int bclk_mz);
+
#endif