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https://github.com/AsahiLinux/u-boot
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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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/*
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* Watchdog test
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*
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* The test verifies the watchdog timer operation.
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* On the first iteration, the test routine disables interrupts and
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* makes a 10-second delay. If the system does not reboot during this delay,
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* the watchdog timer is not operational and the test fails. If the system
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* reboots, on the second iteration the test routine reports a success.
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*/
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#include <post.h>
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#include <watchdog.h>
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#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG
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static ulong gettbl (void)
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{
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ulong r;
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asm ("mftbl %0":"=r" (r));
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return r;
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}
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int watchdog_post_test (int flags)
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{
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if (flags & POST_REBOOT) {
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/* Test passed */
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return 0;
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} else {
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/* 10-second delay */
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int ints = disable_interrupts ();
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ulong base = gettbl ();
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ulong clk = get_tbclk ();
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while ((gettbl () - base) / 10 < clk);
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if (ints)
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enable_interrupts ();
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/*
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* If we have reached this point, the watchdog timer
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* does not work
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*/
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return -1;
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}
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}
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#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */
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