diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/model_6ex/model_6ex_init.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/cpu/intel/model_6ex/model_6ex_init.c b/src/cpu/intel/model_6ex/model_6ex_init.c index 91633ecd9d..d42ff694ee 100644 --- a/src/cpu/intel/model_6ex/model_6ex_init.c +++ b/src/cpu/intel/model_6ex/model_6ex_init.c @@ -69,7 +69,7 @@ static void configure_c_states(void) msr.lo |= (1 << 15); // config lock until next reset. msr.lo |= (1 << 10); // Enable I/O MWAIT redirection for C-States msr.lo &= ~(1 << 9); // Issue a single stop grant cycle upon stpclk - // TODO Do we want Deep C4 and Dynamic L2 shrinking? + msr.lo |= (1 << 3); //dynamic L2 /* Number of supported C-States */ msr.lo &= ~7; @@ -103,7 +103,13 @@ static void configure_misc(void) // TODO: Only if IA32_PLATFORM_ID[17] = 0 and IA32_PLATFORM_ID[50] = 1 msr.lo |= (1 << 16); /* Enhanced SpeedStep Enable */ - // TODO Do we want Deep C4 and Dynamic L2 shrinking? + /* Enable C2E */ + msr.lo |= (1 << 26); + + /* Enable C4E */ + msr.hi |= (1 << (32 - 32)); // C4E + msr.hi |= (1 << (33 - 32)); // Hard C4E + wrmsr(IA32_MISC_ENABLE, msr); msr.lo |= (1 << 20); /* Lock Enhanced SpeedStep Enable */ |