62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
/*
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* \brief Timer driver for core
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* \author Norman Feske
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* \date 2013-04-05
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*/
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/*
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* Copyright (C) 2013-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _CORE__SPEC__RPI__TIMER_H_
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#define _CORE__SPEC__RPI__TIMER_H_
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/* base-hw includes */
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#include <kernel/types.h>
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/* Genode includes */
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#include <util/mmio.h>
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/* core includes */
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#include <board.h>
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namespace Genode { class Timer; }
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/**
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* Timer driver for core
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*
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* Timer channel 0 apparently doesn't work on the RPI, so we use channel 1
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*/
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class Genode::Timer : public Mmio
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{
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private:
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using time_t = Kernel::time_t;
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enum { TICS_PER_MS = Board::SYSTEM_TIMER_CLOCK / 1000 };
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struct Cs : Register<0x0, 32> { struct M1 : Bitfield<1, 1> { }; };
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struct Clo : Register<0x4, 32> { };
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struct Cmp : Register<0x10, 32> { };
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public:
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Timer();
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static unsigned interrupt_id(unsigned const) {
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return Board::SYSTEM_TIMER_IRQ; }
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void start_one_shot(time_t const tics, unsigned const);
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time_t tics_to_us(time_t const tics) const;
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time_t us_to_tics(time_t const us) const;
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time_t max_value();
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time_t value(unsigned const);
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};
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namespace Kernel { using Genode::Timer; }
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#endif /* _CORE__SPEC__RPI__TIMER_H_ */
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