From 53b08c347f54970cf5f6ce35b8e1a1fe5f8a11f9 Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Mon, 10 Dec 2018 14:11:35 +0530 Subject: 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 Reviewed-on: https://review.coreboot.org/c/30123 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/arch/x86/cpu_common.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'src/arch/x86/cpu_common.c') 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); +} -- cgit v1.2.3