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5edde63ac2
Watchdog module added. Off by default because of following limitations: - When programming, the WD fires, and programming fails. For now, you have to program twice. BRANCH=none BUG=chrome-os-partner:23575 TEST=Manually wrote in a while(1); and made sure watchdog warning triggers first, prints IPC register, and then soon after the watchdog timer resets the chip. Signed-off-by: Alec Berg <alecaberg@chromium.org> Change-Id: Ia83f58f3ae108f755d2f139ada22a22e2fbdc2fa Reviewed-on: https://chromium-review.googlesource.com/177397 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Watchdog driver */
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#ifndef __CROS_EC_WATCHDOG_H
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#define __CROS_EC_WATCHDOG_H
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/* Watchdog period in ms; must be at least twice HOOK_TICK_INTERVAL */
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#define WATCHDOG_PERIOD_MS 1100
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/**
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* Initialize the watchdog.
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*
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* This will cause the CPU to reboot if it has been more than 2 watchdog
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* periods since watchdog_reload() has been called.
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*/
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int watchdog_init(void);
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/**
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* Display a trace with information about an expired watchdog timer
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*
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* This shows the location in the code where the expiration happened.
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* Usually this helps locate a loop which is blocking execution of the
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* watchdog task.
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*
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* @param excep_lr Value of lr to indicate caller return
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* @param excep_sp Value of sp to indicate caller task id
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*/
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void watchdog_trace(uint32_t excep_lr, uint32_t excep_sp);
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/**
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* Watchdog has not been tickled recently warning. This function should be
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* called when the watchdog is close to firing.
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*/
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void watchdog_warning_irq(void);
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/* Reload the watchdog counter */
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#ifdef CONFIG_WATCHDOG
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void watchdog_reload(void);
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#else
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static inline void watchdog_reload(void) { }
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#endif
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#endif /* __CROS_EC_WATCHDOG_H */
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