diff options
| author | Nathan Lynch <nathan_lynch@mentor.com> | 2014-09-29 01:50:06 +0200 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2014-09-29 01:59:25 +0200 |
| commit | 8b8dde00347ef409b29abd97e5833ffdb4ed7508 (patch) | |
| tree | 01e5d9b4ba7197f789272b97ef2a73328728f736 /drivers/clocksource | |
| parent | 423bd69e69f565167ba14e2fe61df76c3c4a0d26 (diff) | |
clocksource: arm_arch_timer: Enable counter access for 32-bit ARM
The only difference between arm and arm64's implementations of
arch_counter_set_user_access is that 32-bit ARM does not enable user
access to the virtual counter. We want to enable this access for the
32-bit ARM VDSO, so copy the arm64 version to the driver itself, and
remove the arch-specific implementations.
Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index e0e7729d37fd..42bd4455daca 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -312,6 +312,23 @@ static void arch_timer_configure_evtstream(void) arch_timer_evtstrm_enable(min(pos, 15)); } +static void arch_counter_set_user_access(void) +{ + u32 cntkctl = arch_timer_get_cntkctl(); + + /* Disable user access to the timers and the physical counter */ + /* 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_PCT_ACCESS_EN); + + /* Enable user access to the virtual counter */ + cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN; + + arch_timer_set_cntkctl(cntkctl); +} + static int arch_timer_setup(struct clock_event_device *clk) { __arch_timer_setup(ARCH_CP15_TIMER, clk); |