From 53072d869ad9234781b5a479dfcc9a9288723da6 Mon Sep 17 00:00:00 2001 From: Alexandru Gagniuc Date: Sat, 12 Apr 2014 21:57:18 -0500 Subject: cpu/amd/agesa/family15tn: Add initial support for SMM mode This is the minimal setup needed to be able to execute SMI handlers. Only support for ASEG handlers is added, which should be sufficient for Trinity (up to 4 cores). There are a few hacks which need to be introduced in generic code in order to make this work properly, but these hacks are self-contained. They are a not a result of any special needs of this CPU, but rather from a poorly designed infrastructure. Comments are added to explain how such code could be refactored in the future. Change-Id: Iefd4ae17cf0206cae8848cadba3a12cbe3b2f8b6 Signed-off-by: Alexandru Gagniuc Reviewed-on: http://review.coreboot.org/5493 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/cpu/amd/agesa/family15tn/Makefile.inc | 1 + src/cpu/amd/agesa/family15tn/model_15_init.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+) (limited to 'src/cpu/amd/agesa') diff --git a/src/cpu/amd/agesa/family15tn/Makefile.inc b/src/cpu/amd/agesa/family15tn/Makefile.inc index a5a707167f..19a2f0f298 100644 --- a/src/cpu/amd/agesa/family15tn/Makefile.inc +++ b/src/cpu/amd/agesa/family15tn/Makefile.inc @@ -21,6 +21,7 @@ ramstage-y += chip_name.c ramstage-y += model_15_init.c subdirs-y += ../../mtrr +subdirs-y += ../../smm subdirs-y += ../../../x86/tsc subdirs-y += ../../../x86/lapic subdirs-y += ../../../x86/cache diff --git a/src/cpu/amd/agesa/family15tn/model_15_init.c b/src/cpu/amd/agesa/family15tn/model_15_init.c index f396201181..467a3012df 100644 --- a/src/cpu/amd/agesa/family15tn/model_15_init.c +++ b/src/cpu/amd/agesa/family15tn/model_15_init.c @@ -19,6 +19,7 @@ #include #include +#include #include #include #include @@ -43,6 +44,7 @@ static void model_15_init(device_t dev) u8 i; msr_t msr; int msrno; + unsigned int cpu_idx; #if CONFIG_LOGICAL_CPUS u32 siblings; #endif @@ -110,6 +112,20 @@ static void model_15_init(device_t dev) msr.hi &= ~(1 << (46 - 32)); wrmsr(NB_CFG_MSR, msr); + if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER)) { + cpu_idx = cpu_info()->index; + printk(BIOS_INFO, "Initializing SMM for CPU %u\n", cpu_idx); + + /* Set SMM base address for this CPU */ + msr = rdmsr(MSR_SMM_BASE); + msr.lo = SMM_BASE - (cpu_idx * 0x400); + wrmsr(MSR_SMM_BASE, msr); + + /* Enable the SMM memory window */ + msr = rdmsr(MSR_SMM_MASK); + msr.lo |= (1 << 0); /* Enable ASEG SMRAM Range */ + wrmsr(MSR_SMM_MASK, msr); + } /* Write protect SMM space with SMMLOCK. */ msr = rdmsr(HWCR_MSR); -- cgit v1.2.3