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authorSubrata Banik <subrata.banik@intel.com>2018-12-10 14:11:35 +0530
committerSubrata Banik <subrata.banik@intel.com>2018-12-13 04:32:57 +0000
commit53b08c347f54970cf5f6ce35b8e1a1fe5f8a11f9 (patch)
treeb4eed19fbf1b9f35dfbdddcc43fc84469176ec59 /src/arch/x86/cpu_common.c
parente3110b862071ae0797afb0688495315a7dd47739 (diff)
downloadcoreboot-53b08c347f54970cf5f6ce35b8e1a1fe5f8a11f9.tar.xz
cpuid: Add helper function for cpuid(1) functions
This patch introduces 3 helper function for cpuid(1) : 1. cpu_get_cpuid() -> to get processor id (from cpuid.eax) 2. cpu_get_feature_flags_ecx -> to get processor feature flag (from cpuid.ecx) 3. cpu_get_feature_flags_edx -> to get processor feature flag (from cpuid.edx) Above 3 helper functions are targeted to replace majority of cpuid(1) references. Change-Id: Ib96a7c79dadb1feff0b8d58aa408b355fbb3bc50 Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/c/30123 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/arch/x86/cpu_common.c')
-rw-r--r--src/arch/x86/cpu_common.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/arch/x86/cpu_common.c b/src/arch/x86/cpu_common.c
index d328fe9030..119122786d 100644
--- a/src/arch/x86/cpu_common.c
+++ b/src/arch/x86/cpu_common.c
@@ -66,3 +66,30 @@ int cpu_phys_address_size(void)
return 36;
return 32;
}
+
+/*
+ * Get processor id using cpuid eax=1
+ * return value in EAX register
+ */
+uint32_t cpu_get_cpuid(void)
+{
+ return cpuid_eax(1);
+}
+
+/*
+ * Get processor feature flag using cpuid eax=1
+ * return value in ECX register
+ */
+uint32_t cpu_get_feature_flags_ecx(void)
+{
+ return cpuid_ecx(1);
+}
+
+/*
+ * Get processor feature flag using cpuid eax=1
+ * return value in EDX register
+ */
+uint32_t cpu_get_feature_flags_edx(void)
+{
+ return cpuid_edx(1);
+}