135 lines
2.5 KiB
C++
135 lines
2.5 KiB
C++
/*
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* \brief Implementation of IRQ session component
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 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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/* Genode includes */
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#include <base/printf.h>
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/* core includes */
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#include <irq_root.h>
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/* Codezero includes */
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#include <codezero/syscalls.h>
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using namespace Genode;
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bool Irq_object::_associate() { return true; }
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void Irq_object::_wait_for_irq()
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{
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using namespace Codezero;
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/* block for IRQ */
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int ret = l4_irq_control(IRQ_CONTROL_WAIT, 0, _irq);
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if (ret < 0)
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PWRN("l4_irq_control(IRQ_CONTROL_WAIT) returned %d", ret);
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}
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void Irq_object::start()
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{
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::Thread_base::start();
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_sync_bootup.lock();
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}
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void Irq_object::entry()
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{
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if (!_associate()) {
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PERR("Could not associate with IRQ 0x%x", _irq);
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return;
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}
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/* thread is up and ready */
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_sync_bootup.unlock();
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/* wait for first ack_irq */
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_sync_ack.lock();
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using namespace Codezero;
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/* attach thread to IRQ when first called */
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int ret = l4_irq_control(IRQ_CONTROL_REGISTER, 0, _irq);
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if (ret < 0) {
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PERR("l4_irq_control(IRQ_CONTROL_REGISTER) returned %d", ret);
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return;
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}
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while (true) {
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_wait_for_irq();
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if (!_sig_cap.valid())
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continue;
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Genode::Signal_transmitter(_sig_cap).submit(1);
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_sync_ack.lock();
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}
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}
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Irq_object::Irq_object(unsigned irq)
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:
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Thread<4096>("irq"),
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_sync_ack(Lock::LOCKED), _sync_bootup(Lock::LOCKED),
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_irq(irq)
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{ }
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Irq_session_component::Irq_session_component(Range_allocator *irq_alloc,
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const char *args)
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:
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_irq_number(Arg_string::find_arg(args, "irq_number").long_value(-1)),
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_irq_alloc(irq_alloc),
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_irq_object(_irq_number)
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{
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long msi = Arg_string::find_arg(args, "device_config_phys").long_value(0);
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if (msi)
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throw Root::Unavailable();
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if (!irq_alloc || irq_alloc->alloc_addr(1, _irq_number).is_error()) {
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PERR("Unavailable IRQ 0x%x requested", _irq_number);
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throw Root::Unavailable();
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}
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_irq_object.start();
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}
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Irq_session_component::~Irq_session_component()
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{
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PERR("Not yet implemented.");
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}
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void Irq_session_component::ack_irq()
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{
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_irq_object.ack_irq();
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}
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void Irq_session_component::sigh(Genode::Signal_context_capability cap)
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{
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_irq_object.sigh(cap);
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}
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Genode::Irq_session::Info Irq_session_component::info()
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{
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/* no MSI support */
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return { .type = Genode::Irq_session::Info::Type::INVALID };
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}
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