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Timer session and timer test for 'base-hw'.
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46
os/src/drivers/timer/hw/pbxa9/platform_timer_base.h
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46
os/src/drivers/timer/hw/pbxa9/platform_timer_base.h
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/*
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* \brief Platform-timer base specific for base-hw and PBXA9
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* \author Martin Stein
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* \date 2012-05-03
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*/
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/*
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* Copyright (C) 2012 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 General Public License version 2.
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*/
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#ifndef _OS__SRC__DRIVERS__TIMER__HW__PBXA9__PLATFORM_TIMER_BASE_H_
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#define _OS__SRC__DRIVERS__TIMER__HW__PBXA9__PLATFORM_TIMER_BASE_H_
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/* Genode includes */
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#include <io_mem_session/connection.h>
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#include <drivers/timer/sp804_base.h>
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#include <drivers/board/pbxa9.h>
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/**
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* Platform-timer base specific for base-hw and PBXA9
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*/
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class Platform_timer_base :
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public Genode::Io_mem_connection,
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public Genode::Sp804_base<Genode::Pbxa9::SP804_0_CLOCK>
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{
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public:
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enum { IRQ = Genode::Pbxa9::SP804_0_IRQ };
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/**
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* Constructor
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*/
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Platform_timer_base() :
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Io_mem_connection(Genode::Pbxa9::SP804_0_MMIO_BASE,
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Genode::Pbxa9::SP804_0_MMIO_SIZE),
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Sp804_base((Genode::addr_t)Genode::env()->rm_session()->
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attach(dataspace()))
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{ }
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};
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#endif /* _OS__SRC__DRIVERS__TIMER__HW__PBXA9__PLATFORM_TIMER_BASE_H_ */
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23
os/src/drivers/timer/hw/pbxa9/target.mk
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os/src/drivers/timer/hw/pbxa9/target.mk
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#
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# \brief Timer session server specific for base-hw and PBXA9
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# \author Martin Stein
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# \date 2012-05-03
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#
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# Set program name
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TARGET = timer
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# Add C++ sources
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SRC_CC += main.cc
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# Skip build if required specs not fullfilled
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REQUIRES += hw_pbxa9
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# Add libraries
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LIBS += cxx server env alarm
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# Add include paths
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INC_DIR += $(PRG_DIR) $(PRG_DIR)/../ $(PRG_DIR)/../../nova/
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# Declare source paths
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vpath main.cc $(PRG_DIR)/../..
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110
os/src/drivers/timer/hw/platform_timer.h
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os/src/drivers/timer/hw/platform_timer.h
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/*
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* \brief Platform timer specific for base-hw
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* \author Martin Stein
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* \date 2012-05-03
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*/
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/*
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* Copyright (C) 2012 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 General Public License version 2.
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*/
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#ifndef _OS__SRC__DRIVERS__TIMER__HW__PLATFORM_TIMER_H_
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#define _OS__SRC__DRIVERS__TIMER__HW__PLATFORM_TIMER_H_
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/* Genode includes */
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#include <irq_session/connection.h>
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/* Local includes */
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#include <platform_timer_base.h>
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/**
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* Platform timer specific for base-hw
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*/
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class Platform_timer : public Platform_timer_base,
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public Genode::Irq_connection
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{
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private:
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enum { MAX_TIMER_IRQS_PER_MS = 1 };
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unsigned long const _max_timeout_us; /* Maximum timeout in microsecs */
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unsigned long _curr_time_us; /* Accumulate already measured timeouts */
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unsigned long _init_value; /* Mark last processed timer value */
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Genode::Lock _update_curr_time_lock; /* Serialize curr_time access */
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public:
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/**
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* Constructor
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*/
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Platform_timer() : Irq_connection(Platform_timer_base::IRQ),
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_max_timeout_us(tics_to_us(max_value())),
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_curr_time_us(0), _init_value(0)
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{ }
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/**
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* Refresh and return our instance-own "now"-time in microseconds
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*
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* This function has to be executed regulary,
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* at least all max_timeout() us.
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*/
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unsigned long curr_time()
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{
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/* Serialize updates on timeout counter */
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Genode::Lock::Guard lock(_update_curr_time_lock);
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/* Get time that passed since last time we've read the timer */
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bool wrapped;
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unsigned long const v = value(wrapped);
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unsigned long passed_time;
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if (wrapped) passed_time = _init_value + max_value() - v;
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else passed_time = _init_value - v;
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/* Update initial value for subsequent calculations */
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_init_value = v;
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/* Refresh our timeout counter and return it */
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_curr_time_us += tics_to_us(passed_time);
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return _curr_time_us;
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}
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/**
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* Return maximum timeout as supported by the platform
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*/
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unsigned long max_timeout() const { return _max_timeout_us; }
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/**
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* Schedule next timeout, oversized timeouts are truncated
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*
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* \param timeout_us Timeout in microseconds
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*/
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void schedule_timeout(unsigned long timeout_us)
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{
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/* Serialize updates on timeout counter */
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Genode::Lock::Guard lock(_update_curr_time_lock);
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/* Constraint timout value with our maximum IRQ rate
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* and the maximum possible timout */
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if (timeout_us < 1000/MAX_TIMER_IRQS_PER_MS)
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timeout_us = 1000/MAX_TIMER_IRQS_PER_MS;
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if (timeout_us > _max_timeout_us)
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timeout_us = _max_timeout_us;
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/* Once the timer runs, one can wait for the its IRQ and update our
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* timeout counter through 'curr_time()' (We rely on the fact that
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* this is done at least one time in every max-timeout period) */
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_init_value = us_to_tics(timeout_us);
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run_and_wrap(_init_value);
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}
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/**
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* Await the lastly scheduled timeout
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*/
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void wait_for_timeout(Genode::Thread_base *) { wait_for_irq(); }
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};
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#endif /* _OS__SRC__DRIVERS__TIMER__HW__PLATFORM_TIMER_H_ */
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46
os/src/drivers/timer/hw/vea9x4/platform_timer_base.h
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46
os/src/drivers/timer/hw/vea9x4/platform_timer_base.h
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/*
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* \brief Platform-timer base specific for base-hw and VEA9X4
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* \author Martin Stein
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* \date 2012-05-03
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*/
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/*
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* Copyright (C) 2012 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 General Public License version 2.
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*/
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#ifndef _OS__SRC__DRIVERS__TIMER__HW__VEA9X4__PLATFORM_TIMER_BASE_H_
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#define _OS__SRC__DRIVERS__TIMER__HW__VEA9X4__PLATFORM_TIMER_BASE_H_
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/* Genode includes */
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#include <io_mem_session/connection.h>
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#include <drivers/timer/sp804_base.h>
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#include <drivers/board/vea9x4.h>
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/**
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* Platform-timer base specific for base-hw and VEA9X4
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*/
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class Platform_timer_base :
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public Genode::Io_mem_connection,
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public Genode::Sp804_base<Genode::Vea9x4::SP804_0_1_CLOCK>
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{
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public:
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enum { IRQ = Genode::Vea9x4::SP804_0_1_IRQ };
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/**
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* Constructor
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*/
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Platform_timer_base() :
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Io_mem_connection(Genode::Vea9x4::SP804_0_1_MMIO_BASE,
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Genode::Vea9x4::SP804_0_1_MMIO_SIZE),
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Sp804_base((Genode::addr_t)Genode::env()->rm_session()->
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attach(dataspace()))
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{ }
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};
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#endif /* _OS__SRC__DRIVERS__TIMER__HW__VEA9X4__PLATFORM_TIMER_BASE_H_ */
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24
os/src/drivers/timer/hw/vea9x4/target.mk
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24
os/src/drivers/timer/hw/vea9x4/target.mk
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#
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# \brief Timer session server specific for base-hw and VEA9X4
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# \author Martin Stein
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# \date 2012-05-03
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#
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# Set program name
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TARGET = timer
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# Add C++ sources
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SRC_CC += main.cc
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# Skip build if required specs not fullfilled
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REQUIRES += hw_vea9x4
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# Add libraries
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LIBS += cxx server env alarm
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# Add include paths
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INC_DIR += $(PRG_DIR) $(PRG_DIR)/../ $(PRG_DIR)/../../nova/
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# Declare source paths
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vpath main.cc $(PRG_DIR)/../..
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