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/cpu/intel/haswell/haswell_init.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/cpu/intel/haswell/haswell_init.c') diff --git a/src/cpu/intel/haswell/haswell_init.c b/src/cpu/intel/haswell/haswell_init.c index 2340dd0b03..20c1fac471 100644 --- a/src/cpu/intel/haswell/haswell_init.c +++ b/src/cpu/intel/haswell/haswell_init.c @@ -606,12 +606,12 @@ static void enable_lapic_tpr(void) static void configure_dca_cap(void) { - struct cpuid_result cpuid_regs; + uint32_t feature_flag; msr_t msr; /* Check feature flag in CPUID.(EAX=1):ECX[18]==1 */ - cpuid_regs = cpuid(1); - if (cpuid_regs.ecx & (1 << 18)) { + feature_flag = cpu_get_feature_flags_ecx(); + if (feature_flag & CPUID_DCA) { msr = rdmsr(IA32_PLATFORM_DCA_CAP); msr.lo |= 1; wrmsr(IA32_PLATFORM_DCA_CAP, msr); -- cgit v1.2.3