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36317d46f7
This is a struct representation of the STM32 timer registers, so belongs in registers.h instead of the platform-independent hwtimer.h. Note that there are other problems with the use of this struct. It should be volatile, and if it's a win vs. the macros we should replace ALL macro'd timer register accesses with the struct instead of just those in hwtimer.c (that is, we shouldn't do things both ways). I'll address those in a subsequent CL after testing which way generates the most compact code. No functional changes, just moving the struct definition. BUG=chrome-os-partner:18343 BRANCH=none TEST=build all platforms Change-Id: If29d008fb38b9cc847b69eda1ee7c05e67f6e5e7 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/48415 Reviewed-by: Bill Richardson <wfrichar@chromium.org>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* Copyright (c) 2013 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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/* Hardware timer driver API */
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#ifndef __CROS_EC_HWTIMER_H
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#define __CROS_EC_HWTIMER_H
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/**
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* Programs when the next timer should fire an interrupt.
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* deadline: timestamp of the event.
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*/
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void __hw_clock_event_set(uint32_t deadline);
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/* Returns the timestamp of the next programed event */
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uint32_t __hw_clock_event_get(void);
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/* Cancel the next event programed by __hw_clock_event_set */
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void __hw_clock_event_clear(void);
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/* Returns the value of the free-running counter used as clock. */
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uint32_t __hw_clock_source_read(void);
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/* Override the current value of the hardware counter */
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void __hw_clock_source_set(uint32_t ts);
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/**
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* Initializes the hardware timer used to provide clock services, using the
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* specified start timer value.
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*
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* It returns the IRQ number of the timer routine.
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*/
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int __hw_clock_source_init(uint32_t start_t);
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/**
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* Searches the next deadline and program it in the timer hardware.
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*
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* overflow: if true, the 32-bit counter as overflowed since the last call.
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*
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* This function is exported from the common timers code as an helper for the
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* hardware timer interrupt routine.
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*/
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void process_timers(int overflow);
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/**
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* Set up the timer that we will use as a watchdog warning.
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*
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* Once this has been set up, we will print a warning shortly before the
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* real watchdog fires. To avoid this, hwtimer_reset_watchdog() must be
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* called periodically.
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*
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* This is needed since the real watchdog timer (IWDG) does not provide
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* an interrupt to warn of an impending watchdog reset.
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*/
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void hwtimer_setup_watchdog(void);
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/* Reset the watchdog timer, to avoid the watchdog warning */
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void hwtimer_reset_watchdog(void);
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#endif /* __CROS_EC_HWTIMER_H */
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