mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
/*
|
|
* Watchdog test
|
|
*
|
|
* The test verifies the watchdog timer operation.
|
|
* On the first iteration, the test routine disables interrupts and
|
|
* makes a 10-second delay. If the system does not reboot during this delay,
|
|
* the watchdog timer is not operational and the test fails. If the system
|
|
* reboots, on the second iteration the test routine reports a success.
|
|
*/
|
|
|
|
#include <post.h>
|
|
#include <watchdog.h>
|
|
|
|
#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG
|
|
|
|
static ulong gettbl (void)
|
|
{
|
|
ulong r;
|
|
|
|
asm ("mftbl %0":"=r" (r));
|
|
|
|
return r;
|
|
}
|
|
|
|
int watchdog_post_test (int flags)
|
|
{
|
|
if (flags & POST_REBOOT) {
|
|
/* Test passed */
|
|
|
|
return 0;
|
|
} else {
|
|
/* 10-second delay */
|
|
int ints = disable_interrupts ();
|
|
ulong base = gettbl ();
|
|
ulong clk = get_tbclk ();
|
|
|
|
while ((gettbl () - base) / 10 < clk);
|
|
|
|
if (ints)
|
|
enable_interrupts ();
|
|
|
|
/*
|
|
* If we have reached this point, the watchdog timer
|
|
* does not work
|
|
*/
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */
|