Add a simple qtest to exercise the new system counter device in the SSE-300. We'll add tests of the system timer device here too, so this includes scaffolding (register definitions, etc) for those. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210219144617.4782-45-peter.maydell@linaro.org
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*
|
|
* QTest testcase for the SSE 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 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"
|
|
|
|
/*
|
|
* SSE-123/SSE-300 timer in the mps3-an547 board, where it is driven
|
|
* at 32MHz, so 31.25ns per tick.
|
|
*/
|
|
#define TIMER_BASE 0x48000000
|
|
|
|
/* PERIPHNSPPC0 register in the SSE-300 Secure Access Configuration block */
|
|
#define PERIPHNSPPC0 (0x50080000 + 0x70)
|
|
|
|
/* Base of the System Counter control frame */
|
|
#define COUNTER_BASE 0x58100000
|
|
|
|
/* SSE counter register offsets in the control frame */
|
|
#define CNTCR 0
|
|
#define CNTSR 0x4
|
|
#define CNTCV_LO 0x8
|
|
#define CNTCV_HI 0xc
|
|
#define CNTSCR 0x10
|
|
|
|
/* SSE timer register offsets */
|
|
#define CNTPCT_LO 0
|
|
#define CNTPCT_HI 4
|
|
#define CNTFRQ 0x10
|
|
#define CNTP_CVAL_LO 0x20
|
|
#define CNTP_CVAL_HI 0x24
|
|
#define CNTP_TVAL 0x28
|
|
#define CNTP_CTL 0x2c
|
|
#define CNTP_AIVAL_LO 0x40
|
|
#define CNTP_AIVAL_HI 0x44
|
|
#define CNTP_AIVAL_RELOAD 0x48
|
|
#define CNTP_AIVAL_CTL 0x4c
|
|
|
|
/* 4 ticks in nanoseconds (so we can work in integers) */
|
|
#define FOUR_TICKS 125
|
|
|
|
static void clock_step_ticks(uint64_t ticks)
|
|
{
|
|
/*
|
|
* Advance the qtest clock by however many nanoseconds we
|
|
* need to move the timer forward the specified number of ticks.
|
|
* ticks must be a multiple of 4, so we get a whole number of ns.
|
|
*/
|
|
assert(!(ticks & 3));
|
|
clock_step(FOUR_TICKS * (ticks >> 2));
|
|
}
|
|
|
|
static void reset_counter_and_timer(void)
|
|
{
|
|
/*
|
|
* Reset the system counter and the timer between tests. This
|
|
* isn't a full reset, but it's sufficient for what the tests check.
|
|
*/
|
|
writel(COUNTER_BASE + CNTCR, 0);
|
|
writel(TIMER_BASE + CNTP_CTL, 0);
|
|
writel(TIMER_BASE + CNTP_AIVAL_CTL, 0);
|
|
writel(COUNTER_BASE + CNTCV_LO, 0);
|
|
writel(COUNTER_BASE + CNTCV_HI, 0);
|
|
}
|
|
|
|
static void test_counter(void)
|
|
{
|
|
/* Basic counter functionality test */
|
|
|
|
reset_counter_and_timer();
|
|
/* The counter should start disabled: check that it doesn't move */
|
|
clock_step_ticks(100);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_LO), ==, 0);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_HI), ==, 0);
|
|
/* Now enable it and check that it does count */
|
|
writel(COUNTER_BASE + CNTCR, 1);
|
|
clock_step_ticks(100);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_LO), ==, 100);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_HI), ==, 0);
|
|
/* Check the counter scaling functionality */
|
|
writel(COUNTER_BASE + CNTCR, 0);
|
|
writel(COUNTER_BASE + CNTSCR, 0x00100000); /* 1/16th normal speed */
|
|
writel(COUNTER_BASE + CNTCR, 5); /* EN, SCEN */
|
|
clock_step_ticks(160);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_LO), ==, 110);
|
|
g_assert_cmpuint(readl(COUNTER_BASE + CNTCV_HI), ==, 0);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int r;
|
|
|
|
g_test_init(&argc, &argv, NULL);
|
|
|
|
qtest_start("-machine mps3-an547");
|
|
|
|
qtest_add_func("/sse-timer/counter", test_counter);
|
|
|
|
r = g_test_run();
|
|
|
|
qtest_end();
|
|
|
|
return r;
|
|
}
|