cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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cmsdk-apb-timer-test.c (2158B)

      1/*
      2 * QTest testcase for the CMSDK APB timer device
      3 *
      4 * Copyright (c) 2021 Linaro Limited
      5 *
      6 * This program is free software; you can redistribute it and/or modify it
      7 * under the terms of the GNU General Public License as published by the
      8 * Free Software Foundation; either version 2 of the License, or
      9 * (at your option) any later version.
     10 *
     11 * This program is distributed in the hope that it will be useful, but WITHOUT
     12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
     14 * for more details.
     15 */
     16
     17#include "qemu/osdep.h"
     18#include "libqtest-single.h"
     19
     20/* IoTKit/ARMSSE-200 timer0; driven at 25MHz in mps2-an385, so 40ns per tick */
     21#define TIMER_BASE 0x40000000
     22
     23#define CTRL 0
     24#define VALUE 4
     25#define RELOAD 8
     26#define INTSTATUS 0xc
     27
     28static void test_timer(void)
     29{
     30    g_assert_true(readl(TIMER_BASE + INTSTATUS) == 0);
     31
     32    /* Start timer: will fire after 40 * 1000 == 40000 ns */
     33    writel(TIMER_BASE + RELOAD, 1000);
     34    writel(TIMER_BASE + CTRL, 9);
     35
     36    /* Step to just past the 500th tick and check VALUE */
     37    clock_step(40 * 500 + 1);
     38    g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), ==, 0);
     39    g_assert_cmpuint(readl(TIMER_BASE + VALUE), ==, 500);
     40
     41    /* Just past the 1000th tick: timer should have fired */
     42    clock_step(40 * 500);
     43    g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), ==, 1);
     44    g_assert_cmpuint(readl(TIMER_BASE + VALUE), ==, 0);
     45
     46    /* VALUE reloads at the following tick */
     47    clock_step(40);
     48    g_assert_cmpuint(readl(TIMER_BASE + VALUE), ==, 1000);
     49
     50    /* Check write-1-to-clear behaviour of INTSTATUS */
     51    writel(TIMER_BASE + INTSTATUS, 0);
     52    g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), ==, 1);
     53    writel(TIMER_BASE + INTSTATUS, 1);
     54    g_assert_cmpuint(readl(TIMER_BASE + INTSTATUS), ==, 0);
     55
     56    /* Turn off the timer */
     57    writel(TIMER_BASE + CTRL, 0);
     58}
     59
     60int main(int argc, char **argv)
     61{
     62    int r;
     63
     64    g_test_init(&argc, &argv, NULL);
     65
     66    qtest_start("-machine mps2-an385");
     67
     68    qtest_add_func("/cmsdk-apb-timer/timer", test_timer);
     69
     70    r = g_test_run();
     71
     72    qtest_end();
     73
     74    return r;
     75}