So far we were only testing the CVAL register. Add a test which programs
a (relative) TVAL value to check this functionality as well.
Also we go into WFI and wait for the interrupt to release us from it.
The timer tests are run with a 2 second timeout on the host side, so
that any failure in coming back would be covered.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
arm/timer.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arm/timer.c b/arm/timer.c
index 1c9ef44..275d049 100644
--- a/arm/timer.c
+++ b/arm/timer.c
@@ -211,6 +211,7 @@ static void test_timer(struct timer_info *info)
u64 now = info->read_counter();
u64 time_10s = read_sysreg(cntfrq_el0) * 10;
u64 later = now + time_10s;
+ s32 left;
/* We don't want the irq handler to fire because that will change the
* timer state and we want to test the timer output signal. We can
@@ -236,6 +237,15 @@ static void test_timer(struct timer_info *info)
/* Disable the timer again */
info->write_ctl(0);
+
+ /* Test TVAL and IRQ trigger */
+ info->irq_received = false;
+ info->write_tval(read_sysreg(cntfrq_el0) / 100); /* 10 ms */
+ info->write_ctl(ARCH_TIMER_CTL_ENABLE);
+ wfi();
+ left = info->read_tval();
+ report("interrupt received after TVAL/WFI", info->irq_received);
+ report("timer has expired (%d)", left < 0, left);
}
static void test_vtimer(void)
--
2.14.4
