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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 24/46] tests: Add a simple test of the CMSDK APB timer
Date: Fri, 29 Jan 2021 10:59:50 +0000
Message-Id: <20210129110012.8660-25-peter.maydell@linaro.org>
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Add a simple test of the CMSDK APB timer, since we're about to do
some refactoring of how it is clocked.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daud=C3=A9 <f4bug@amsat.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Tested-by: Philippe Mathieu-Daud=C3=A9 <f4bug@amsat.org>
Message-id: 20210128114145.20536-4-peter.maydell@linaro.org
Message-id: 20210121190622.22000-4-peter.maydell@linaro.org
---
tests/qtest/cmsdk-apb-timer-test.c | 75 ++++++++++++++++++++++++++++++
MAINTAINERS | 1 +
tests/qtest/meson.build | 1 +
3 files changed, 77 insertions(+)
create mode 100644 tests/qtest/cmsdk-apb-timer-test.c
diff --git a/tests/qtest/cmsdk-apb-timer-test.c b/tests/qtest/cmsdk-apb-tim=
er-test.c
new file mode 100644
index 00000000000..e85e1f7448e
--- /dev/null
+++ b/tests/qtest/cmsdk-apb-timer-test.c
@@ -0,0 +1,75 @@
+/*
+ * QTest testcase for the CMSDK APB timer device
+ *
+ * Copyright (c) 2021 Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WIT=
HOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+
+/* IoTKit/ARMSSE-200 timer0; driven at 25MHz in mps2-an385, so 40ns per ti=
ck */
+#define TIMER_BASE 0x40000000
+
+#define CTRL 0
+#define VALUE 4
+#define RELOAD 8
+#define INTSTATUS 0xc
+
+static void test_timer(void)
+{
+ g_assert_true(readl(TIMER_BASE + INTSTATUS) =3D=3D 0);
+
+ /* Start timer: will fire after 40 * 1000 =3D=3D 40000 ns */
+ writel(TIMER_BASE + RELOAD, 1000);
+ writel(TIMER_BASE + CTRL, 9);
+
+ /* Step to just past the 500th tick and check VALUE */
+ clock_step(40 * 500 + 1);
+ g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), =3D=3D, 0);
+ g_assert_cmpuint(readl(TIMER_BASE + VALUE), =3D=3D, 500);
+
+ /* Just past the 1000th tick: timer should have fired */
+ clock_step(40 * 500);
+ g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), =3D=3D, 1);
+ g_assert_cmpuint(readl(TIMER_BASE + VALUE), =3D=3D, 0);
+
+ /* VALUE reloads at the following tick */
+ clock_step(40);
+ g_assert_cmpuint(readl(TIMER_BASE + VALUE), =3D=3D, 1000);
+
+ /* Check write-1-to-clear behaviour of INTSTATUS */
+ writel(TIMER_BASE + INTSTATUS, 0);
+ g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), =3D=3D, 1);
+ writel(TIMER_BASE + INTSTATUS, 1);
+ g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), =3D=3D, 0);
+
+ /* Turn off the timer */
+ writel(TIMER_BASE + CTRL, 0);
+}
+
+int main(int argc, char **argv)
+{
+ int r;
+
+ g_test_init(&argc, &argv, NULL);
+
+ qtest_start("-machine mps2-an385");
+
+ qtest_add_func("/cmsdk-apb-timer/timer", test_timer);
+
+ r =3D g_test_run();
+
+ qtest_end();
+
+ return r;
+}
diff --git a/MAINTAINERS b/MAINTAINERS
index 34359a99b8e..6c15f7db317 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -581,6 +581,7 @@ F: include/hw/rtc/pl031.h
F: include/hw/arm/primecell.h
F: hw/timer/cmsdk-apb-timer.c
F: include/hw/timer/cmsdk-apb-timer.h
+F: tests/qtest/cmsdk-apb-timer-test.c
F: hw/timer/cmsdk-apb-dualtimer.c
F: include/hw/timer/cmsdk-apb-dualtimer.h
F: hw/char/cmsdk-apb-uart.c
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 7ccdf023111..519a40d5b82 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -142,6 +142,7 @@ qtests_npcm7xx =3D \
'npcm7xx_timer-test',
'npcm7xx_watchdog_timer-test']
qtests_arm =3D \
+ (config_all_devices.has_key('CONFIG_CMSDK_APB_TIMER') ? ['cmsdk-apb-time=
r-test'] : []) + \
(config_all_devices.has_key('CONFIG_PFLASH_CFI02') ? ['pflash-cfi02-test=
'] : []) + \
(config_all_devices.has_key('CONFIG_NPCM7XX') ? qtests_npcm7xx : []) + \
['arm-cpu-features',
--=20
2.20.1