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tests/qtest/sse-timer-test: Test counter scaling changes 

Test that when we change the scaling of the system counter that the
system timer responds appropriately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Peter Maydell 2021-03-08 15:02:52 +00:00
parent f277d1c373
commit bf7ca80386
1 changed files with 32 additions and 0 deletions
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32
tests/qtest/sse-timer-test.c
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@ -189,6 +189,37 @@ static void test_timer(void)
g_assert_cmpuint(readl(TIMER_BASE + CNTP_AIVAL_HI), ==, 0x42);
}
static void test_timer_scale_change(void)
{
/*
* Test that the timer responds correctly to counter
* scaling changes while it has an active timer.
*/
reset_counter_and_timer();
/* Give ourselves access to the timer, and enable the counter and timer */
writel(PERIPHNSPPC0, 1);
writel(COUNTER_BASE + CNTCR, 1);
writel(TIMER_BASE + CNTP_CTL, 1);
/* Set the CompareValue to 4000 ticks */
writel(TIMER_BASE + CNTP_CVAL_LO, 4000);
writel(TIMER_BASE + CNTP_CVAL_HI, 0);
/* Advance halfway and check ISTATUS is not set */
clock_step_ticks(2000);
g_assert_cmpuint(readl(TIMER_BASE + CNTP_CTL), ==, 1);
/* Reprogram the counter to run at 1/16th speed */
writel(COUNTER_BASE + CNTCR, 0);
writel(COUNTER_BASE + CNTSCR, 0x00100000); /* 1/16th normal speed */
writel(COUNTER_BASE + CNTCR, 5); /* EN, SCEN */
/* Advance to where the timer would have fired and check it has not */
clock_step_ticks(2000);
g_assert_cmpuint(readl(TIMER_BASE + CNTP_CTL), ==, 1);
/* Advance to where the timer must fire at the new clock rate */
clock_step_ticks(29996);
g_assert_cmpuint(readl(TIMER_BASE + CNTP_CTL), ==, 1);
clock_step_ticks(4);
g_assert_cmpuint(readl(TIMER_BASE + CNTP_CTL), ==, 5);
}
int main(int argc, char **argv)
{
int r;
@ -199,6 +230,7 @@ int main(int argc, char **argv)
qtest_add_func("/sse-timer/counter", test_counter);
qtest_add_func("/sse-timer/timer", test_timer);
qtest_add_func("/sse-timer/timer-scale-change", test_timer_scale_change);
r = g_test_run();