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+/*
+ * test-bus.c
+ * ----------
+ * Test raw read/write performance across the EIM or FMC bus.
+ *
+ * Copyright (c) 2015, NORDUnet A/S 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.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT
+ * HOLDER OR CONTRIBUTORS 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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <assert.h>
+
+#include <sys/time.h>
+
+#include <hal.h>
+
+#define TEST_NUM_ROUNDS 2000000
+
+/*
+ * Sanity test - are the cores present, and can we get a random number?
+ */
+
+static int sanity(void)
+{
+ uint32_t rnd, data;
+ int n = 10;
+ hal_error_t err;
+
+ if (((err = hal_io_expected(BOARD_ADDR_NAME0, (const uint8_t *) NOVENA_BOARD_NAME0, 4)) != HAL_OK) ||
+ ((err = hal_io_expected(CSPRNG_ADDR_NAME0, (const uint8_t *) CSPRNG_NAME0, 4)) != HAL_OK)) {
+ printf("initialization failed (is the bitstream loaded?): %s\n",
+ hal_error_string(err));
+ return 1;
+ }
+
+ if ((err = hal_io_wait(CSPRNG_ADDR_STATUS, CSPRNG_STATUS_VALID, &n)) != HAL_OK) {
+ printf("waiting for CSPRNG: %s\n", hal_error_string(err));
+ return 1;
+ }
+ if ((err = hal_io_read(CSPRNG_ADDR_RANDOM, (uint8_t *) &rnd, sizeof(rnd))) != HAL_OK) {
+ printf("reading CSPRNG: %s\n", hal_error_string(err));
+ return 1;
+ }
+
+ if ((err = hal_io_write(BOARD_ADDR_DUMMY, (const uint8_t *) &rnd, sizeof(rnd))) != HAL_OK) {
+ printf("writing dummy: %s\n", hal_error_string(err));
+ return 1;
+ }
+ if ((err = hal_io_read(BOARD_ADDR_DUMMY, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
+ printf("reading dummy: %s\n", hal_error_string(err));
+ return 1;
+ }
+
+ if (data != rnd) {
+ printf("Data bus fail: expected %08x, got %08x, diff %08x\n", rnd, data, data ^ rnd);
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Time a test.
+ */
+
+static void _time_check(char *label, const struct timeval t0, const int err)
+{
+ struct timeval t;
+ float rounds;
+ gettimeofday(&t, NULL);
+ t.tv_sec -= t0.tv_sec;
+ t.tv_usec = t0.tv_usec;
+ if (t.tv_usec < 0) {
+ t.tv_usec += 1000000;
+ t.tv_sec -= 1;
+ }
+ rounds = (float)TEST_NUM_ROUNDS/((float)t.tv_sec + ((float)t.tv_usec / 1000000));
+ printf("%s%lu.%06lu seconds, %u/sec\n", label, t.tv_sec, t.tv_usec, (unsigned)rounds);
+}
+
+#define time_check(_label_, _expr_) \
+ do { \
+ struct timeval _t; \
+ gettimeofday(&_t, NULL); \
+ int _err = (_expr_); \
+ _time_check(_label_, _t, _err); \
+ err |= _err; \
+ } while (0)
+
+/*
+ * Read and write over and over again.
+ */
+
+static int test_read(void)
+{
+ uint32_t i, data;
+ hal_error_t err;
+
+ for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+ if ((err = hal_io_read(BOARD_ADDR_DUMMY, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
+ printf("reading dummy: %s\n", hal_error_string(err));
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int test_write(void)
+{
+ uint32_t i;
+ hal_error_t err;
+
+ for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+ if ((err = hal_io_write(BOARD_ADDR_DUMMY, (const uint8_t *) &i, sizeof(i))) != HAL_OK) {
+ printf("writing dummy: %s\n", hal_error_string(err));
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int main(void)
+{
+ int err = 0;
+
+ if (sanity() != 0)
+ return 1;
+
+ time_check("read ", test_read());
+ time_check("write ", test_write());
+
+ return err;
+}