diff options
Diffstat (limited to 'src/cpu/intel')
| -rw-r--r-- | src/cpu/intel/model_1067x/model_1067x_init.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/cpu/intel/model_1067x/model_1067x_init.c b/src/cpu/intel/model_1067x/model_1067x_init.c index 6553f29077..cd722f540c 100644 --- a/src/cpu/intel/model_1067x/model_1067x_init.c +++ b/src/cpu/intel/model_1067x/model_1067x_init.c @@ -166,6 +166,8 @@ static void configure_emttm_tables(void) wrmsr(MSR_EMTTM_CR_TABLE(5), msr); } +#define IA32_PECI_CTL 0x5a0 + static void configure_misc(const int eist, const int tm2, const int emttm) { msr_t msr; @@ -208,6 +210,13 @@ static void configure_misc(const int eist, const int tm2, const int emttm) msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */ wrmsr(IA32_MISC_ENABLE, msr); } + + /* Enable PECI + WARNING: due to Erratum AW67 described in Intel document #318733 + the microcode must be updated before this MSR is written to. */ + msr = rdmsr(IA32_PECI_CTL); + msr.lo |= 1; + wrmsr(IA32_PECI_CTL, msr); } #define PIC_SENS_CFG 0x1aa |