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rtc-test: introduce more update tests

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Test divider reset and UIP behavior.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2017-07-25 13:46:29 +02:00
parent bc706fa903
commit da3a392f05
1 changed files with 81 additions and 1 deletions
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82
tests/rtc-test.c
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@@ -325,6 +325,30 @@ static void set_datetime_bcd(int h, int min, int s, int d, int m, int y)
cmos_write(RTC_DAY_OF_MONTH, d);
}
static void set_datetime_dec(int h, int min, int s, int d, int m, int y)
{
cmos_write(RTC_HOURS, h);
cmos_write(RTC_MINUTES, min);
cmos_write(RTC_SECONDS, s);
cmos_write(RTC_YEAR, y % 100);
cmos_write(RTC_CENTURY, y / 100);
cmos_write(RTC_MONTH, m);
cmos_write(RTC_DAY_OF_MONTH, d);
}
static void set_datetime(int mode, int h, int min, int s, int d, int m, int y)
{
cmos_write(RTC_REG_B, mode);
cmos_write(RTC_REG_A, 0x76);
if (mode & REG_B_DM) {
set_datetime_dec(h, min, s, d, m, y);
} else {
set_datetime_bcd(h, min, s, d, m, y);
}
cmos_write(RTC_REG_A, 0x26);
}
#define assert_time(h, m, s) \
do { \
g_assert_cmpint(cmos_read(RTC_HOURS), ==, h); \
@@ -559,6 +583,60 @@ static void register_b_set_flag(void)
assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011);
}
static void divider_reset(void)
{
/* Enable binary-coded decimal (BCD) mode in Register B*/
cmos_write(RTC_REG_B, REG_B_24H);
/* Enter divider reset */
cmos_write(RTC_REG_A, 0x76);
set_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011);
assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011);
/* Since divider reset flag is still enabled, these are equality checks. */
clock_step(1000000000LL);
assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011);
/* The first update ends 500 ms after divider reset */
cmos_write(RTC_REG_A, 0x26);
clock_step(500000000LL - UIP_HOLD_LENGTH - 1);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0);
assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011);
clock_step(1);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, !=, 0);
clock_step(UIP_HOLD_LENGTH);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0);
assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011);
}
static void uip_stuck(void)
{
set_datetime(REG_B_24H, 0x02, 0x04, 0x58, 0x02, 0x02, 0x2011);
/* The first update ends 500 ms after divider reset */
(void)cmos_read(RTC_REG_C);
clock_step(500000000LL);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0);
assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011);
/* UF is now set. */
cmos_write(RTC_HOURS_ALARM, 0x02);
cmos_write(RTC_MINUTES_ALARM, 0xC0);
cmos_write(RTC_SECONDS_ALARM, 0xC0);
/* Because the alarm will fire soon, reading register A will latch UIP. */
clock_step(1000000000LL - UIP_HOLD_LENGTH / 2);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, !=, 0);
/* Move the alarm far away. This must not cause UIP to remain stuck! */
cmos_write(RTC_HOURS_ALARM, 0x03);
clock_step(UIP_HOLD_LENGTH);
g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0);
}
#define RTC_PERIOD_CODE1 13 /* 8 Hz */
#define RTC_PERIOD_CODE2 15 /* 2 Hz */
@@ -625,7 +703,9 @@ int main(int argc, char **argv)
qtest_add_func("/rtc/basic/bcd-12h", basic_12h_bcd);
qtest_add_func("/rtc/set-year/20xx", set_year_20xx);
qtest_add_func("/rtc/set-year/1980", set_year_1980);
qtest_add_func("/rtc/misc/register_b_set_flag", register_b_set_flag);
qtest_add_func("/rtc/update/register_b_set_flag", register_b_set_flag);
qtest_add_func("/rtc/update/divider-reset", divider_reset);
qtest_add_func("/rtc/update/uip-stuck", uip_stuck);
qtest_add_func("/rtc/misc/fuzz-registers", fuzz_registers);
qtest_add_func("/rtc/periodic/interrupt", periodic_timer);