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6d64111b3c
The hardware watchdog automatically shutdown the device after 10s of inactivity, being defined as 10s without the tick IRQ fired (aka braindead device). The software IRQ mechanism is more interesting: it uses a very high priority timer setup as one-shot to trigger after 5s of inactivity (but IRQ still enabled). When detected, it patches the running code to insert a SWI instruction so that on interrupt return it will trigger a SWI and produce a meaningfull backtrace to debug the deadlock. This should allow to debug freezes in IRQ context. Change-Id: Ic55dad01201676bfb6dd79e78e535c6707cb88e6
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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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
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef TIMROT_IMX233_H
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#define TIMROT_IMX233_H
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#include "system.h"
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#include "cpu.h"
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#include "icoll-imx233.h"
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#include "regs/regs-timrot.h"
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/* list of timers */
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enum
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{
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TIMER_TICK, /* for tick task */
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TIMER_USER, /* for user timer */
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TIMER_WATCHDOG, /* for watchdog */
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};
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struct imx233_timrot_info_t
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{
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unsigned fixed_count, run_count;
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unsigned src;
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unsigned prescale;
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bool reload;
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bool polarity;
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bool irqen;
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};
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typedef void (*imx233_timer_fn_t)(void);
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void imx233_timrot_init(void);
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void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count,
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unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn);
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void imx233_timrot_set_priority(unsigned timer_nr, unsigned prio);
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struct imx233_timrot_info_t imx233_timrot_get_info(unsigned timer_nr);
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#endif /* TIMROT_IMX233_H */
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