test: Move qtests to a separate directory

The tests directory itself is pretty overcrowded, and it's hard to
see which test belongs to which test subsystem (unit, qtest, ...).
Let's move the qtests to a separate folder for more clarity.

Message-Id: <20191218103059.11729-6-thuth@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 1090 insertions, 0 deletions

diff --git a/tests/qtest/test-arm-mptimer.c b/tests/qtest/test-arm-mptimer.c
new file mode 100644
index 0000000..7a56d56
--- /dev/null
+++ b/tests/qtest/test-arm-mptimer.c
@@ -0,0 +1,1090 @@
+/*
+ * QTest testcase for the ARM MPTimer
+ *
+ * Copyright (c) 2016 Dmitry Osipenko <digetx@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/timer.h"
+#include "libqtest-single.h"
+
+#define TIMER_BLOCK_SCALE(s)    ((((s) & 0xff) + 1) * 10)
+
+#define TIMER_BLOCK_STEP(scaler, steps_nb) \
+    clock_step(TIMER_BLOCK_SCALE(scaler) * (int64_t)(steps_nb) + 1)
+
+#define TIMER_BASE_PHYS 0x1e000600
+
+#define TIMER_LOAD      0x00
+#define TIMER_COUNTER   0x04
+#define TIMER_CONTROL   0x08
+#define TIMER_INTSTAT   0x0C
+
+#define TIMER_CONTROL_ENABLE        (1 << 0)
+#define TIMER_CONTROL_PERIODIC      (1 << 1)
+#define TIMER_CONTROL_IT_ENABLE     (1 << 2)
+#define TIMER_CONTROL_PRESCALER(p)  (((p) & 0xff) << 8)
+
+#define PERIODIC     1
+#define ONESHOT      0
+#define NOSCALE      0
+
+static int nonscaled = NOSCALE;
+static int scaled = 122;
+
+static void timer_load(uint32_t load)
+{
+    writel(TIMER_BASE_PHYS + TIMER_LOAD, load);
+}
+
+static void timer_start(int periodic, uint32_t scale)
+{
+    uint32_t ctl = TIMER_CONTROL_ENABLE | TIMER_CONTROL_PRESCALER(scale);
+
+    if (periodic) {
+        ctl |= TIMER_CONTROL_PERIODIC;
+    }
+
+    writel(TIMER_BASE_PHYS + TIMER_CONTROL, ctl);
+}
+
+static void timer_stop(void)
+{
+    writel(TIMER_BASE_PHYS + TIMER_CONTROL, 0);
+}
+
+static void timer_int_clr(void)
+{
+    writel(TIMER_BASE_PHYS + TIMER_INTSTAT, 1);
+}
+
+static void timer_reset(void)
+{
+    timer_stop();
+    timer_load(0);
+    timer_int_clr();
+}
+
+static uint32_t timer_get_and_clr_int_sts(void)
+{
+    uint32_t int_sts = readl(TIMER_BASE_PHYS + TIMER_INTSTAT);
+
+    if (int_sts) {
+        timer_int_clr();
+    }
+
+    return int_sts;
+}
+
+static uint32_t timer_counter(void)
+{
+    return readl(TIMER_BASE_PHYS + TIMER_COUNTER);
+}
+
+static void timer_set_counter(uint32_t value)
+{
+    writel(TIMER_BASE_PHYS + TIMER_COUNTER, value);
+}
+
+static void test_timer_oneshot(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(9999999);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 9999);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+    g_assert_cmpuint(timer_counter(), ==, 9990000);
+
+    TIMER_BLOCK_STEP(scaler, 9990000);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    TIMER_BLOCK_STEP(scaler, 9990000);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_pause(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(999999999);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 999);
+
+    g_assert_cmpuint(timer_counter(), ==, 999999000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(scaler, 9000);
+
+    g_assert_cmpuint(timer_counter(), ==, 999990000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_stop();
+
+    g_assert_cmpuint(timer_counter(), ==, 999990000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(scaler, 90000);
+
+    g_assert_cmpuint(timer_counter(), ==, 999990000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 999990000);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    TIMER_BLOCK_STEP(scaler, 999990000);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+}
+
+static void test_timer_reload(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 90000);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 90000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_load(UINT32_MAX);
+
+    TIMER_BLOCK_STEP(scaler, 90000);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 90000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_periodic(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+    int repeat = 10;
+
+    timer_reset();
+    timer_load(100);
+    timer_start(PERIODIC, scaler);
+
+    while (repeat--) {
+        clock_step(TIMER_BLOCK_SCALE(scaler) * (101 + repeat) + 1);
+
+        g_assert_cmpuint(timer_counter(), ==, 100 - repeat);
+        g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+        clock_step(TIMER_BLOCK_SCALE(scaler) * (101 - repeat) - 1);
+    }
+}
+
+static void test_timer_oneshot_to_periodic(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(10000);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1000);
+
+    g_assert_cmpuint(timer_counter(), ==, 9000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 14001);
+
+    g_assert_cmpuint(timer_counter(), ==, 5000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+}
+
+static void test_timer_periodic_to_oneshot(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(99999999);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 999);
+
+    g_assert_cmpuint(timer_counter(), ==, 99999000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 99999009);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+}
+
+static void test_timer_prescaler(void)
+{
+    timer_reset();
+    timer_load(9999999);
+    timer_start(ONESHOT, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 9999998);
+
+    g_assert_cmpuint(timer_counter(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    timer_reset();
+    timer_load(9999999);
+    timer_start(ONESHOT, 0xAB);
+
+    TIMER_BLOCK_STEP(0xAB, 9999998);
+
+    g_assert_cmpuint(timer_counter(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(0xAB, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+}
+
+static void test_timer_prescaler_on_the_fly(void)
+{
+    timer_reset();
+    timer_load(9999999);
+    timer_start(ONESHOT, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 999);
+
+    g_assert_cmpuint(timer_counter(), ==, 9999000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(ONESHOT, 0xAB);
+
+    TIMER_BLOCK_STEP(0xAB, 9000);
+
+    g_assert_cmpuint(timer_counter(), ==, 9990000);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_set_oneshot_counter_to_0(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_set_counter(0);
+
+    TIMER_BLOCK_STEP(scaler, 10);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_set_periodic_counter_to_0(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_set_counter(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - (scaler ? 0 : 1));
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_reset();
+    timer_set_counter(UINT32_MAX);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_set_counter(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_noload_oneshot(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_noload_periodic(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_zero_load_oneshot(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_zero_load_periodic(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_zero_load_oneshot_to_nonzero(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_load(999);
+
+    TIMER_BLOCK_STEP(scaler, 1001);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+}
+
+static void test_timer_zero_load_periodic_to_nonzero(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+    int i;
+
+    timer_reset();
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_load(1999999);
+
+    for (i = 1; i < 10; i++) {
+        TIMER_BLOCK_STEP(scaler, 2000001);
+
+        g_assert_cmpuint(timer_counter(), ==, 1999999 - i);
+        g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+        g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+    }
+}
+
+static void test_timer_nonzero_load_oneshot_to_zero(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_load(UINT32_MAX);
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_nonzero_load_periodic_to_zero(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_load(UINT32_MAX);
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_set_periodic_counter_on_the_fly(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX / 2);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX / 2 - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_set_counter(UINT32_MAX);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_enable_and_set_counter(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_set_counter(UINT32_MAX);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_set_counter_and_enable(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_set_counter(UINT32_MAX);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_set_counter_disabled(void)
+{
+    timer_reset();
+    timer_set_counter(999999999);
+
+    TIMER_BLOCK_STEP(NOSCALE, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 999999999);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_load_disabled(void)
+{
+    timer_reset();
+    timer_load(999999999);
+
+    TIMER_BLOCK_STEP(NOSCALE, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 999999999);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_oneshot_with_counter_0_on_start(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(999);
+    timer_set_counter(0);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_periodic_with_counter_0_on_start(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+    int i;
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_set_counter(0);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX + (scaler ? 1 : 0) - 100);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX + (scaler ? 1 : 0) - 200);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_reset();
+    timer_load(1999999);
+    timer_set_counter(0);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    for (i = 2 - (!!scaler ? 1 : 0); i < 10; i++) {
+        TIMER_BLOCK_STEP(scaler, 2000001);
+
+        g_assert_cmpuint(timer_counter(), ==, 1999999 - i);
+        g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+        g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+    }
+}
+
+static void test_periodic_counter(gconstpointer arg)
+{
+    const int test_load = 10;
+    int scaler = *((int *) arg);
+    int test_val;
+
+    timer_reset();
+    timer_load(test_load);
+    timer_start(PERIODIC, scaler);
+
+    clock_step(1);
+
+    for (test_val = 0; test_val <= test_load; test_val++) {
+        clock_step(TIMER_BLOCK_SCALE(scaler) * test_load);
+        g_assert_cmpint(timer_counter(), ==, test_val);
+    }
+}
+
+static void test_timer_set_counter_periodic_with_zero_load(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_start(PERIODIC, scaler);
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    timer_set_counter(999);
+
+    TIMER_BLOCK_STEP(scaler, 999);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_set_oneshot_load_to_0(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_set_periodic_load_to_0(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, UINT32_MAX - 100);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_load(0);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+    g_assert_cmpuint(timer_counter(), ==, 0);
+}
+
+static void test_deferred_trigger(void)
+{
+    int mode = ONESHOT;
+
+again:
+    timer_reset();
+    timer_start(mode, 255);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    timer_reset();
+    timer_load(2);
+    timer_start(mode, 255);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(mode, 255);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_set_counter(0);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    timer_reset();
+    timer_load(UINT32_MAX);
+    timer_start(mode, 255);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_load(0);
+
+    clock_step(100);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+
+    if (mode == ONESHOT) {
+        mode = PERIODIC;
+        goto again;
+    }
+}
+
+static void test_timer_zero_load_mode_switch(gconstpointer arg)
+{
+    int scaler = *((int *) arg);
+
+    timer_reset();
+    timer_load(0);
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    timer_start(ONESHOT, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    timer_start(PERIODIC, scaler);
+
+    TIMER_BLOCK_STEP(scaler, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, !!scaler);
+}
+
+static void test_timer_zero_load_prescaled_periodic_to_nonscaled_oneshot(void)
+{
+    timer_reset();
+    timer_load(0);
+    timer_start(PERIODIC, 255);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    timer_start(ONESHOT, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_zero_load_prescaled_oneshot_to_nonscaled_periodic(void)
+{
+    timer_reset();
+    timer_load(0);
+    timer_start(ONESHOT, 255);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(PERIODIC, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_zero_load_nonscaled_oneshot_to_prescaled_periodic(void)
+{
+    timer_reset();
+    timer_load(0);
+    timer_start(ONESHOT, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(PERIODIC, 255);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+static void test_timer_zero_load_nonscaled_periodic_to_prescaled_oneshot(void)
+{
+    timer_reset();
+    timer_load(0);
+    timer_start(PERIODIC, NOSCALE);
+
+    TIMER_BLOCK_STEP(NOSCALE, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    timer_start(ONESHOT, 255);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 1);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+
+    TIMER_BLOCK_STEP(255, 1);
+
+    g_assert_cmpuint(timer_counter(), ==, 0);
+    g_assert_cmpuint(timer_get_and_clr_int_sts(), ==, 0);
+}
+
+/*
+ * Add a qtest test that comes in two versions: one with
+ * a timer scaler setting, and one with the timer nonscaled.
+ */
+static void add_scaler_test(const char *str, bool scale,
+                            void (*fn)(const void *))
+{
+    char *name;
+    int *scaler = scale ? &scaled : &nonscaled;
+
+    name = g_strdup_printf("%s=%d", str, *scaler);
+    qtest_add_data_func(name, scaler, fn);
+    g_free(name);
+}
+
+int main(int argc, char **argv)
+{
+    int ret;
+    int scale;
+
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_func("mptimer/deferred_trigger", test_deferred_trigger);
+    qtest_add_func("mptimer/load_disabled", test_timer_load_disabled);
+    qtest_add_func("mptimer/set_counter_disabled", test_timer_set_counter_disabled);
+    qtest_add_func("mptimer/zero_load_prescaled_periodic_to_nonscaled_oneshot",
+                   test_timer_zero_load_prescaled_periodic_to_nonscaled_oneshot);
+    qtest_add_func("mptimer/zero_load_prescaled_oneshot_to_nonscaled_periodic",
+                   test_timer_zero_load_prescaled_oneshot_to_nonscaled_periodic);
+    qtest_add_func("mptimer/zero_load_nonscaled_oneshot_to_prescaled_periodic",
+                   test_timer_zero_load_nonscaled_oneshot_to_prescaled_periodic);
+    qtest_add_func("mptimer/zero_load_nonscaled_periodic_to_prescaled_oneshot",
+                   test_timer_zero_load_nonscaled_periodic_to_prescaled_oneshot);
+    qtest_add_func("mptimer/prescaler", test_timer_prescaler);
+    qtest_add_func("mptimer/prescaler_on_the_fly", test_timer_prescaler_on_the_fly);
+
+    for (scale = 0; scale < 2; scale++) {
+        add_scaler_test("mptimer/oneshot scaler",
+                        scale, test_timer_oneshot);
+        add_scaler_test("mptimer/pause scaler",
+                        scale, test_timer_pause);
+        add_scaler_test("mptimer/reload scaler",
+                        scale, test_timer_reload);
+        add_scaler_test("mptimer/periodic scaler",
+                        scale, test_timer_periodic);
+        add_scaler_test("mptimer/oneshot_to_periodic scaler",
+                        scale, test_timer_oneshot_to_periodic);
+        add_scaler_test("mptimer/periodic_to_oneshot scaler",
+                        scale, test_timer_periodic_to_oneshot);
+        add_scaler_test("mptimer/set_oneshot_counter_to_0 scaler",
+                        scale, test_timer_set_oneshot_counter_to_0);
+        add_scaler_test("mptimer/set_periodic_counter_to_0 scaler",
+                        scale, test_timer_set_periodic_counter_to_0);
+        add_scaler_test("mptimer/noload_oneshot scaler",
+                        scale, test_timer_noload_oneshot);
+        add_scaler_test("mptimer/noload_periodic scaler",
+                        scale, test_timer_noload_periodic);
+        add_scaler_test("mptimer/zero_load_oneshot scaler",
+                        scale, test_timer_zero_load_oneshot);
+        add_scaler_test("mptimer/zero_load_periodic scaler",
+                        scale, test_timer_zero_load_periodic);
+        add_scaler_test("mptimer/zero_load_oneshot_to_nonzero scaler",
+                        scale, test_timer_zero_load_oneshot_to_nonzero);
+        add_scaler_test("mptimer/zero_load_periodic_to_nonzero scaler",
+                        scale, test_timer_zero_load_periodic_to_nonzero);
+        add_scaler_test("mptimer/nonzero_load_oneshot_to_zero scaler",
+                        scale, test_timer_nonzero_load_oneshot_to_zero);
+        add_scaler_test("mptimer/nonzero_load_periodic_to_zero scaler",
+                        scale, test_timer_nonzero_load_periodic_to_zero);
+        add_scaler_test("mptimer/set_periodic_counter_on_the_fly scaler",
+                        scale, test_timer_set_periodic_counter_on_the_fly);
+        add_scaler_test("mptimer/enable_and_set_counter scaler",
+                        scale, test_timer_enable_and_set_counter);
+        add_scaler_test("mptimer/set_counter_and_enable scaler",
+                        scale, test_timer_set_counter_and_enable);
+        add_scaler_test("mptimer/oneshot_with_counter_0_on_start scaler",
+                        scale, test_timer_oneshot_with_counter_0_on_start);
+        add_scaler_test("mptimer/periodic_with_counter_0_on_start scaler",
+                        scale, test_timer_periodic_with_counter_0_on_start);
+        add_scaler_test("mptimer/periodic_counter scaler",
+                        scale, test_periodic_counter);
+        add_scaler_test("mptimer/set_counter_periodic_with_zero_load scaler",
+                        scale, test_timer_set_counter_periodic_with_zero_load);
+        add_scaler_test("mptimer/set_oneshot_load_to_0 scaler",
+                        scale, test_timer_set_oneshot_load_to_0);
+        add_scaler_test("mptimer/set_periodic_load_to_0 scaler",
+                        scale, test_timer_set_periodic_load_to_0);
+        add_scaler_test("mptimer/zero_load_mode_switch scaler",
+                        scale, test_timer_zero_load_mode_switch);
+    }
+
+    qtest_start("-machine vexpress-a9");
+    ret = g_test_run();
+    qtest_end();
+
+    return ret;
+}