4d3d4ecca0
With this, we get rid of platform specific timer interfaces. The new Timer class does the same as the old Clock class and has a generic interface. The old Timer class was merely used by the old Clock class. Also, we get rid of having only one timer instance which we tell with each method call for which CPU it shall be done. Instead now each Cpu object has its own Timer member that knows the CPU it works for. Also, rename all "tics" to "ticks". Fixes #2347
75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
/*
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* \brief Timer driver for core
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* \author Adrian-Ken Rueegsegger
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* \author Reto Buerki
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* \date 2015-02-06
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*/
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/*
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* Copyright (C) 2015-2017 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 _TIMER_DRIVER_H_
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#define _TIMER_DRIVER_H_
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/* Genode includes */
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#include <util/mmio.h>
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#include <base/stdint.h>
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/* core includes */
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#include <port_io.h>
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#include <board.h>
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namespace Kernel { class Timer_driver; }
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/**
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* LAPIC-based timer driver for core
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*/
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struct Kernel::Timer_driver : Genode::Mmio
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{
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enum {
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/* PIT constants */
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PIT_TICK_RATE = 1193182ul,
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PIT_SLEEP_MS = 50,
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PIT_SLEEP_TICS = (PIT_TICK_RATE / 1000) * PIT_SLEEP_MS,
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PIT_CH0_DATA = 0x40,
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PIT_CH2_DATA = 0x42,
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PIT_CH2_GATE = 0x61,
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PIT_MODE = 0x43,
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};
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/* Timer registers */
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struct Tmr_lvt : Register<0x320, 32>
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{
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struct Vector : Bitfield<0, 8> { };
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struct Delivery : Bitfield<8, 3> { };
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struct Mask : Bitfield<16, 1> { };
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struct Timer_mode : Bitfield<17, 2> { };
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};
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struct Tmr_initial : Register <0x380, 32> { };
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struct Tmr_current : Register <0x390, 32> { };
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struct Divide_configuration : Register <0x03e0, 32>
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{
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struct Divide_value_0_2 : Bitfield<0, 2> { };
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struct Divide_value_2_1 : Bitfield<3, 1> { };
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struct Divide_value :
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Genode::Bitset_2<Divide_value_0_2, Divide_value_2_1>
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{
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enum { MAX = 6 };
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};
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};
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Genode::uint32_t ticks_per_ms = 0;
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/* Measure LAPIC timer frequency using PIT channel 2 */
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Genode::uint32_t pit_calc_timer_freq(void);
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Timer_driver(unsigned);
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};
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#endif /* _TIMER_DRIVER_H_ */
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