/* * (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. */#ifdef CONFIG_POST#include <post.h>#include <watchdog.h>#if CONFIG_POST & CFG_POST_WATCHDOGstatic 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 & CFG_POST_WATCHDOG */#endif /* CONFIG_POST */