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
89 lines
2.0 KiB
C++
89 lines
2.0 KiB
C++
/*
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* \brief Timer driver for core
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* \author Stefan Kalkowski
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* \author Martin stein
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* \date 2013-01-10
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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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/* core include */
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#include <kernel/timer.h>
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#include <board.h>
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#include <platform.h>
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using namespace Genode;
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using namespace Kernel;
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unsigned Timer::interrupt_id() const
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{
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switch (_driver.cpu_id) {
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case 0: return Board::MCT_IRQ_L0;
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case 1: return Board::MCT_IRQ_L1;
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default: return 0;
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}
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}
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Timer_driver::Timer_driver(unsigned cpu_id)
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:
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Mmio(Platform::mmio_to_virt(Board::MCT_MMIO_BASE)),
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ticks_per_ms(calc_ticks_per_ms(Board::MCT_CLOCK)),
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cpu_id(cpu_id)
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{
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Mct_cfg::access_t mct_cfg = 0;
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Mct_cfg::Prescaler::set(mct_cfg, PRESCALER);
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Mct_cfg::Div_mux::set(mct_cfg, DIV_MUX);
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write<Mct_cfg>(mct_cfg);
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write<L0_int_enb>(L0_int_enb::Frceie::bits(1));
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write<L1_int_enb>(L1_int_enb::Frceie::bits(1));
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}
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void Timer::_start_one_shot(time_t const ticks)
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{
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switch (_driver.cpu_id) {
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case 0:
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_driver.write<Driver::L0_int_cstat::Frcnt>(1);
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_driver.run_0(0);
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_driver.acked_write<Driver::L0_frcntb, Driver::L0_wstat::Frcntb>(ticks);
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_driver.run_0(1);
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return;
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case 1:
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_driver.write<Driver::L1_int_cstat::Frcnt>(1);
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_driver.run_1(0);
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_driver.acked_write<Driver::L1_frcntb, Driver::L1_wstat::Frcntb>(ticks);
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_driver.run_1(1);
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return;
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default: return;
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}
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}
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time_t Timer::_value()
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{
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switch (_driver.cpu_id) {
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case 0: return _driver.read<Driver::L0_int_cstat::Frcnt>() ? 0 : _driver.read<Driver::L0_frcnto>();
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case 1: return _driver.read<Driver::L1_int_cstat::Frcnt>() ? 0 : _driver.read<Driver::L1_frcnto>();
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default: return 0;
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}
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}
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time_t Timer::_ticks_to_us(time_t const ticks) const {
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return (ticks / _driver.ticks_per_ms) * 1000; }
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time_t Timer::us_to_ticks(time_t const us) const {
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return (us / 1000) * _driver.ticks_per_ms; }
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time_t Timer::_max_value() const {
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return (Driver::L0_frcnto::access_t)~0; }
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