c05ed00afb
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
134 lines
2.7 KiB
C
134 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <linux/delay.h>
|
|
|
|
static int test_get_timer(void)
|
|
{
|
|
ulong base, start, next, diff;
|
|
int iter;
|
|
|
|
base = get_timer(0);
|
|
start = get_timer(0);
|
|
for (iter = 0; iter < 10; iter++) {
|
|
do {
|
|
next = get_timer(0);
|
|
} while (start == next);
|
|
|
|
if (start + 1 != next) {
|
|
printf("%s: iter=%d, start=%lu, next=%lu, expected a difference of 1\n",
|
|
__func__, iter, start, next);
|
|
return -EINVAL;
|
|
}
|
|
start++;
|
|
}
|
|
|
|
/*
|
|
* Check that get_timer(base) matches our elapsed time, allowing that
|
|
* an extra millisecond may have passed.
|
|
*/
|
|
diff = get_timer(base);
|
|
if (diff != iter && diff != iter + 1) {
|
|
printf("%s: expected get_timer(base) to match elapsed time: diff=%lu, expected=%d\n",
|
|
__func__, diff, iter);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int test_timer_get_us(void)
|
|
{
|
|
ulong prev, next, min = 1000000;
|
|
long delta;
|
|
int iter;
|
|
|
|
/* Find the minimum delta we can measure, in microseconds */
|
|
prev = timer_get_us();
|
|
for (iter = 0; iter < 100; ) {
|
|
next = timer_get_us();
|
|
if (next != prev) {
|
|
delta = next - prev;
|
|
if (delta < 0) {
|
|
printf("%s: timer_get_us() went backwards from %lu to %lu\n",
|
|
__func__, prev, next);
|
|
return -EINVAL;
|
|
} else if (delta != 0) {
|
|
if (delta < min)
|
|
min = delta;
|
|
prev = next;
|
|
iter++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (min != 1) {
|
|
printf("%s: Minimum microsecond delta should be 1 but is %lu\n",
|
|
__func__, min);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int test_time_comparison(void)
|
|
{
|
|
ulong start_us, end_us, delta_us;
|
|
long error;
|
|
ulong start;
|
|
|
|
start = get_timer(0);
|
|
start_us = timer_get_us();
|
|
while (get_timer(start) < 1000)
|
|
;
|
|
end_us = timer_get_us();
|
|
delta_us = end_us - start_us;
|
|
error = delta_us - 1000000;
|
|
printf("%s: Microsecond time for 1 second: %lu, error = %ld\n",
|
|
__func__, delta_us, error);
|
|
if (abs(error) > 1000)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int test_udelay(void)
|
|
{
|
|
long error;
|
|
ulong start, delta;
|
|
int iter;
|
|
|
|
start = get_timer(0);
|
|
for (iter = 0; iter < 1000; iter++)
|
|
udelay(1000);
|
|
delta = get_timer(start);
|
|
error = delta - 1000;
|
|
printf("%s: Delay time for 1000 udelay(1000): %lu ms, error = %ld\n",
|
|
__func__, delta, error);
|
|
if (abs(error) > 100)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int do_ut_time(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
|
|
{
|
|
int ret = 0;
|
|
|
|
ret |= test_get_timer();
|
|
ret |= test_timer_get_us();
|
|
ret |= test_time_comparison();
|
|
ret |= test_udelay();
|
|
|
|
printf("Test %s\n", ret ? "failed" : "passed");
|
|
|
|
return ret ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
|
|
}
|