diff options
Diffstat (limited to 'arch/arm/include/asm/arch_timer.h')
| -rw-r--r-- | arch/arm/include/asm/arch_timer.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index 75975d9efd3..729f6d98df8 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -106,6 +106,18 @@ static inline u64 arch_counter_get_cntvct(void) asm volatile("mrrc p15, 1, %Q0, %R0, c14" : "=r" (cval)); return cval; } + +static inline void __cpuinit arch_counter_set_user_access(void) +{ + u32 cntkctl; + + asm volatile("mrc p15, 0, %0, c14, c1, 0" : "=r" (cntkctl)); + + /* disable user access to everything */ + cntkctl &= ~((3 << 8) | (7 << 0)); + + asm volatile("mcr p15, 0, %0, c14, c1, 0" : : "r" (cntkctl)); +} #else static inline int arch_timer_of_register(void) { |