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| author | Sudeep KarkadaNagesha | 2013-08-13 14:43:26 +0200 |
|---|---|---|
| committer | Sudeep KarkadaNagesha | 2013-09-26 10:47:06 +0200 |
| commit | 28061758dc83df445a05af347b5ce55ccd968c03 (patch) | |
| tree | 1d71665616502ee20af7450d0f27fd2d0d39d119 /arch/arm | |
| parent | Linux 3.12-rc2 (diff) | |
| download | kernel-qcow2-linux-28061758dc83df445a05af347b5ce55ccd968c03.tar.gz kernel-qcow2-linux-28061758dc83df445a05af347b5ce55ccd968c03.tar.xz kernel-qcow2-linux-28061758dc83df445a05af347b5ce55ccd968c03.zip | |
ARM/ARM64: arch_timer: add macros for bits in control register
Add macros to describe the bitfields in the ARM architected timer
control register to make code easy to understand.
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/arch_timer.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index 5665134bfa3e..d57e04de8e8c 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -93,8 +93,13 @@ static inline void arch_counter_set_user_access(void) asm volatile("mrc p15, 0, %0, c14, c1, 0" : "=r" (cntkctl)); - /* disable user access to everything */ - cntkctl &= ~((3 << 8) | (7 << 0)); + /* Disable user access to both physical/virtual counters/timers */ + /* Also disable virtual event stream */ + cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN + | ARCH_TIMER_USR_VT_ACCESS_EN + | ARCH_TIMER_VIRT_EVT_EN + | ARCH_TIMER_USR_VCT_ACCESS_EN + | ARCH_TIMER_USR_PCT_ACCESS_EN); asm volatile("mcr p15, 0, %0, c14, c1, 0" : : "r" (cntkctl)); } |