source: mainline/kernel/test/fpu/mips2.c@ c2efbb4

/*
 * Copyright (c) 2005 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <print.h>
#include <debug.h>

#include <test.h>
#include <atomic.h>
#include <proc/thread.h>
#include <time/delay.h>

#include <arch.h>

#define THREADS   50
#define DELAY     10000L
#define ATTEMPTS  5

static atomic_t threads_ok;
static atomic_t threads_fault;
static waitq_t can_start;

static void testit1(void *data)
{
        int i;
        int arg __attribute__((aligned(16))) = (int) ((unative_t) data);
        int after_arg __attribute__((aligned(16)));
        
        thread_detach(THREAD);
        
        waitq_sleep(&can_start);
        
        for (i = 0; i < ATTEMPTS; i++) {
                asm volatile (
                        "mtc1 %0,$1"
                        : "=r" (arg)
                );
                
                delay(DELAY);
                
                asm volatile (
                        "mfc1 %0, $1"
                        : "=r" (after_arg)
                );
                
                if (arg != after_arg) {
                        TPRINTF("General reg tid%" PRIu64 ": arg(%d) != %d\n", THREAD->tid, arg, after_arg);
                        atomic_inc(&threads_fault);
                        break;
                }
        }
        atomic_inc(&threads_ok);
}

static void testit2(void *data)
{
        int i;
        int arg __attribute__((aligned(16))) = (int) ((unative_t) data);
        int after_arg __attribute__((aligned(16)));
        
        thread_detach(THREAD);
        
        waitq_sleep(&can_start);
        
        for (i = 0; i < ATTEMPTS; i++) {
                asm volatile (
                        "mtc1 %0,$1"
                        : "=r" (arg)
                );
                
                scheduler();
                asm volatile (
                        "mfc1 %0,$1"
                        : "=r" (after_arg)
                );
                
                if (arg != after_arg) {
                        TPRINTF("General reg tid%" PRIu64 ": arg(%d) != %d\n", THREAD->tid, arg, after_arg);
                        atomic_inc(&threads_fault);
                        break;
                }
        }
        atomic_inc(&threads_ok);
}


char *test_mips2(void)
{
        unsigned int i;
        atomic_count_t total = 0;
        
        waitq_initialize(&can_start);
        atomic_set(&threads_ok, 0);
        atomic_set(&threads_fault, 0);
        
        TPRINTF("Creating %u threads... ", 2 * THREADS);
        
        for (i = 0; i < THREADS; i++) {
                thread_t *t;
                
                if (!(t = thread_create(testit1, (void *) ((unative_t) 2 * i), TASK, 0, "testit1", false))) {
                        TPRINTF("could not create thread %u\n", 2 * i);
                        break;
                }
                thread_ready(t);
                total++;
                
                if (!(t = thread_create(testit2, (void *) ((unative_t) 2 * i + 1), TASK, 0, "testit2", false))) {
                        TPRINTF("could not create thread %u\n", 2 * i + 1);
                        break;
                }
                thread_ready(t);
                total++;
        }
        
        TPRINTF("ok\n");
        
        thread_sleep(1);
        waitq_wakeup(&can_start, WAKEUP_ALL);
        
        while (atomic_get(&threads_ok) != total) {
                TPRINTF("Threads left: %d\n", total - atomic_get(&threads_ok));
                thread_sleep(1);
        }
        
        if (atomic_get(&threads_fault) == 0)
                return NULL;
        
        return "Test failed";
}