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https://github.com/brain-hackers/u-boot-brain
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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
60 lines
1.1 KiB
C
60 lines
1.1 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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* SPDX-License-Identifier: GPL-2.0+
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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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