On 19:06 Thu 21 Jan , Peter Maydell wrote:
> Add a simple test of the CMSDK dual timer, since we're about to do
> some refactoring of how it is clocked.
>
> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
> ---
> tests/qtest/cmsdk-apb-dualtimer-test.c | 131 +++++++++++++++++++++++++
> MAINTAINERS | 1 +
> tests/qtest/meson.build | 1 +
> 3 files changed, 133 insertions(+)
> create mode 100644 tests/qtest/cmsdk-apb-dualtimer-test.c
>
> diff --git a/tests/qtest/cmsdk-apb-dualtimer-test.c
> b/tests/qtest/cmsdk-apb-dualtimer-test.c
> new file mode 100644
> index 00000000000..5a29d65fd6d
> --- /dev/null
> +++ b/tests/qtest/cmsdk-apb-dualtimer-test.c
> @@ -0,0 +1,131 @@
> +/*
> + * QTest testcase for the CMSDK APB dualtimer 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
> WITHOUT
> + * 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 dualtimer; driven at 25MHz in mps2-an385, so 40ns per tick
> */
> +#define TIMER_BASE 0x40002000
> +
> +#define TIMER1LOAD 0
> +#define TIMER1VALUE 4
> +#define TIMER1CONTROL 8
> +#define TIMER1INTCLR 0xc
> +#define TIMER1RIS 0x10
> +#define TIMER1MIS 0x14
> +#define TIMER1BGLOAD 0x18
> +
> +#define TIMER2LOAD 0x20
> +#define TIMER2VALUE 0x24
> +#define TIMER2CONTROL 0x28
> +#define TIMER2INTCLR 0x2c
> +#define TIMER2RIS 0x30
> +#define TIMER2MIS 0x34
> +#define TIMER2BGLOAD 0x38
> +
> +#define CTRL_ENABLE (1 << 7)
> +#define CTRL_PERIODIC (1 << 6)
> +#define CTRL_INTEN (1 << 5)
> +#define CTRL_PRESCALE_1 (0 << 2)
> +#define CTRL_PRESCALE_16 (1 << 2)
> +#define CTRL_PRESCALE_256 (2 << 2)
> +#define CTRL_32BIT (1 << 1)
> +#define CTRL_ONESHOT (1 << 0)
> +
> +static void test_dualtimer(void)
> +{
> + g_assert_true(readl(TIMER_BASE + TIMER1RIS) == 0);
> +
> + /* Start timer: will fire after 40000 ns */
> + writel(TIMER_BASE + TIMER1LOAD, 1000);
> + /* enable in free-running, wrapping, interrupt mode */
> + writel(TIMER_BASE + TIMER1CONTROL, CTRL_ENABLE | CTRL_INTEN);
> +
> + /* Step to just past the 500th tick and check VALUE */
> + clock_step(20001);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 0);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 500);
> +
> + /* Just past the 1000th tick: timer should have fired */
> + clock_step(20000);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 1);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 0);
> +
> + /*
> + * We are in free-running wrapping 16-bit mode, so on the following
> + * tick VALUE should have wrapped round to 0xffff.
> + */
> + clock_step(40);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 0xffff);
> +
> + /* Check that any write to INTCLR clears interrupt */
> + writel(TIMER_BASE + TIMER1INTCLR, 1);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 0);
> +
> + /* Turn off the timer */
> + writel(TIMER_BASE + TIMER1CONTROL, 0);
> +}
> +
> +static void test_prescale(void)
> +{
> + g_assert_true(readl(TIMER_BASE + TIMER2RIS) == 0);
> +
> + /* Start timer: will fire after 40 * 256 * 1000 == 1024000 ns */
> + writel(TIMER_BASE + TIMER2LOAD, 1000);
> + /* enable in periodic, wrapping, interrupt mode, prescale 256 */
> + writel(TIMER_BASE + TIMER2CONTROL,
> + CTRL_ENABLE | CTRL_INTEN | CTRL_PERIODIC | CTRL_PRESCALE_256);
> +
> + /* Step to just past the 500th tick and check VALUE */
> + clock_step(40 * 256 * 501);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 0);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 500);
> +
> + /* Just past the 1000th tick: timer should have fired */
> + clock_step(40 * 256 * 500);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 1);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 0);
> +
> + /* In periodic mode the tick VALUE now reloads */
> + clock_step(256);
Shouldn't it be "clock_step(40 * 256)", i.e. 1 tick?
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 1000);
> +
> + /* Check that any write to INTCLR clears interrupt */
> + writel(TIMER_BASE + TIMER2INTCLR, 1);
> + g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 0);
> +
> + /* Turn off the timer */
> + writel(TIMER_BASE + TIMER2CONTROL, 0);
> +}
> +
> +int main(int argc, char **argv)
> +{
> + QTestState *s;
> + int r;
> +
> + g_test_init(&argc, &argv, NULL);
> +
> + s = qtest_start("-machine mps2-an385");
> +
> + qtest_add_func("/cmsdk-apb-dualtimer/dualtimer", test_dualtimer);
> + qtest_add_func("/cmsdk-apb-dualtimer/prescale", test_prescale);
> +
> + r = g_test_run();
> +
> + qtest_end();
> +
> + return r;
> +}
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 58956497888..118f70e47fb 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -584,6 +584,7 @@ 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: tests/qtest/cmsdk-apb-dualtimer-test.c
> F: hw/char/cmsdk-apb-uart.c
> F: include/hw/char/cmsdk-apb-uart.h
> F: hw/watchdog/cmsdk-apb-watchdog.c
> diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
> index 9e2ebc47041..69dd4a8547c 100644
> --- a/tests/qtest/meson.build
> +++ b/tests/qtest/meson.build
> @@ -141,6 +141,7 @@ qtests_npcm7xx = \
> 'npcm7xx_timer-test',
> 'npcm7xx_watchdog_timer-test']
> qtests_arm = \
> + (config_all_devices.has_key('CONFIG_CMSDK_APB_DUALTIMER') ?
> ['cmsdk-apb-dualtimer-test'] : []) + \
> (config_all_devices.has_key('CONFIG_CMSDK_APB_TIMER') ?
> ['cmsdk-apb-timer-test'] : []) + \
> (config_all_devices.has_key('CONFIG_CMSDK_APB_WATCHDOG') ?
> ['cmsdk-apb-watchdog-test'] : []) + \
> (config_all_devices.has_key('CONFIG_PFLASH_CFI02') ? ['pflash-cfi02-test']
> : []) + \
> --
> 2.20.1
>
--
