diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/intel/turbo/turbo.c | 17 | ||||
| -rw-r--r-- | src/include/cpu/intel/turbo.h | 3 |
2 files changed, 20 insertions, 0 deletions
diff --git a/src/cpu/intel/turbo/turbo.c b/src/cpu/intel/turbo/turbo.c index ac6627372b..3fae3f0bd7 100644 --- a/src/cpu/intel/turbo/turbo.c +++ b/src/cpu/intel/turbo/turbo.c @@ -106,3 +106,20 @@ void enable_turbo(void) printk(BIOS_INFO, "Turbo has been enabled\n"); } } + +/* + * Try to disable Turbo mode. + */ +void disable_turbo(void) +{ + msr_t msr; + + /* Set Turbo Disable bit in Misc Enables */ + msr = rdmsr(MSR_IA32_MISC_ENABLES); + msr.hi |= H_MISC_DISABLE_TURBO; + wrmsr(MSR_IA32_MISC_ENABLES, msr); + + /* Update cached turbo state */ + set_global_turbo_state(TURBO_UNAVAILABLE); + printk(BIOS_INFO, "Turbo has been disabled\n"); +} diff --git a/src/include/cpu/intel/turbo.h b/src/include/cpu/intel/turbo.h index 6626cb13c0..58f4831d4b 100644 --- a/src/include/cpu/intel/turbo.h +++ b/src/include/cpu/intel/turbo.h @@ -39,4 +39,7 @@ int get_turbo_state(void); /* Enable turbo */ void enable_turbo(void); +/* Disable turbo */ +void disable_turbo(void); + #endif |