17c79a9e23
Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
182 lines
3.7 KiB
C++
182 lines
3.7 KiB
C++
/*
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* \brief OKL4-specific implementation of IRQ sessions
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* \author Norman Feske
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* \author Christian Helmuth
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* \date 2009-12-15
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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/log.h>
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#include <util/arg_string.h>
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/* core includes */
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#include <irq_root.h>
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#include <irq_session_component.h>
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/* base-internal includes */
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#include <base/internal/native_utcb.h>
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/* OKL4 includes */
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namespace Okl4 { extern "C" {
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#include <l4/thread.h>
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#include <l4/schedule.h>
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#include <l4/interrupt.h>
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#include <l4/security.h>
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#include <l4/ipc.h>
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} }
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using namespace Okl4;
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using namespace Genode;
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/* bit to use for IRQ notifications */
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enum { IRQ_NOTIFY_BIT = 13 };
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/* XXX move this functionality to a central place instead of duplicating it */
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static inline Okl4::L4_ThreadId_t thread_get_my_global_id()
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{
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Okl4::L4_ThreadId_t myself;
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myself.raw = Okl4::__L4_TCR_ThreadWord(UTCB_TCR_THREAD_WORD_MYSELF);
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return myself;
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}
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bool Irq_object::_associate()
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{
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/* allow roottask (ourself) to handle the interrupt */
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L4_LoadMR(0, _irq);
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int ret = L4_AllowInterruptControl(L4_rootspace);
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if (ret != 1) {
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error("L4_AllowInterruptControl returned ", ret, ", error=",
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L4_ErrorCode());
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return false;
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}
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/*
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* Note: 'L4_Myself()' does not work for the thread argument of
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* 'L4_RegisterInterrupt'. We have to specify our global ID.
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*/
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L4_LoadMR(0, _irq);
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ret = L4_RegisterInterrupt(thread_get_my_global_id(), IRQ_NOTIFY_BIT, 0, 0);
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if (ret != 1) {
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error("L4_RegisterInterrupt returned ", ret, ", error=",
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L4_ErrorCode());
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return false;
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}
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return true;
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}
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void Irq_object::_wait_for_irq()
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{
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/* prepare ourself to receive asynchronous IRQ notifications */
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L4_Set_NotifyMask(1 << IRQ_NOTIFY_BIT);
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L4_Accept(L4_NotifyMsgAcceptor);
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/* wait for asynchronous interrupt notification */
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L4_ThreadId_t partner = L4_nilthread;
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L4_ReplyWait(partner, &partner);
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}
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void Irq_object::start()
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{
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::Thread::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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error("could not associate with IRQ ", Hex(_irq));
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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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while (true) {
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L4_LoadMR(0, _irq);
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L4_AcknowledgeInterrupt(0, 0);
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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_deprecated<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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/***************************
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** IRQ session component **
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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).error()) {
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error("unavailable IRQ ", Hex(_irq_number), " requested");
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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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warning(__func__, " 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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