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tests: Add a simple test of the CMSDK APB watchdog 

Add a simple test of the CMSDK watchdog, since we're about to do some
refactoring of how it is clocked.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210128114145.20536-5-peter.maydell@linaro.org
Message-id: 20210121190622.22000-5-peter.maydell@linaro.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
master
Peter Maydell 2021-01-28 11:41:24 +00:00
parent 30858dafd1
commit 9cf5eb29b2
3 changed files with 81 additions and 0 deletions
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1
MAINTAINERS
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@ -588,6 +588,7 @@ F: hw/char/cmsdk-apb-uart.c
F: include/hw/char/cmsdk-apb-uart.h
F: hw/watchdog/cmsdk-apb-watchdog.c
F: include/hw/watchdog/cmsdk-apb-watchdog.h
F: tests/qtest/cmsdk-apb-watchdog-test.c
F: hw/misc/tz-ppc.c
F: include/hw/misc/tz-ppc.h
F: hw/misc/tz-mpc.c

79
tests/qtest/cmsdk-apb-watchdog-test.c Normal file
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@ -0,0 +1,79 @@
/*
* QTest testcase for the CMSDK APB watchdog 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"
/*
* lm3s811evb watchdog; at board startup this runs at 200MHz / 16 == 12.5MHz,
* which is 80ns per tick.
*/
#define WDOG_BASE 0x40000000
#define WDOGLOAD 0
#define WDOGVALUE 4
#define WDOGCONTROL 8
#define WDOGINTCLR 0xc
#define WDOGRIS 0x10
#define WDOGMIS 0x14
#define WDOGLOCK 0xc00
static void test_watchdog(void)
{
g_assert_cmpuint(readl(WDOG_BASE + WDOGRIS), ==, 0);
writel(WDOG_BASE + WDOGCONTROL, 1);
writel(WDOG_BASE + WDOGLOAD, 1000);
/* Step to just past the 500th tick */
clock_step(500 * 80 + 1);
g_assert_cmpuint(readl(WDOG_BASE + WDOGRIS), ==, 0);
g_assert_cmpuint(readl(WDOG_BASE + WDOGVALUE), ==, 500);
/* Just past the 1000th tick: timer should have fired */
clock_step(500 * 80);
g_assert_cmpuint(readl(WDOG_BASE + WDOGRIS), ==, 1);
g_assert_cmpuint(readl(WDOG_BASE + WDOGVALUE), ==, 0);
/* VALUE reloads at following tick */
clock_step(80);
g_assert_cmpuint(readl(WDOG_BASE + WDOGVALUE), ==, 1000);
/* Writing any value to WDOGINTCLR clears the interrupt and reloads */
clock_step(500 * 80);
g_assert_cmpuint(readl(WDOG_BASE + WDOGVALUE), ==, 500);
g_assert_cmpuint(readl(WDOG_BASE + WDOGRIS), ==, 1);
writel(WDOG_BASE + WDOGINTCLR, 0);
g_assert_cmpuint(readl(WDOG_BASE + WDOGVALUE), ==, 1000);
g_assert_cmpuint(readl(WDOG_BASE + WDOGRIS), ==, 0);
}
int main(int argc, char **argv)
{
int r;
g_test_init(&argc, &argv, NULL);
qtest_start("-machine lm3s811evb");
qtest_add_func("/cmsdk-apb-watchdog/watchdog", test_watchdog);
r = g_test_run();
qtest_end();
return r;
}

1
tests/qtest/meson.build
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@ -143,6 +143,7 @@ qtests_npcm7xx = \
'npcm7xx_watchdog_timer-test']
qtests_arm = \
(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'] : []) + \
(config_all_devices.has_key('CONFIG_NPCM7XX') ? qtests_npcm7xx : []) + \
['arm-cpu-features',