127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
/*
|
|
* \brief Implementations of the signaling framework specific for HW-core
|
|
* \author Martin Stein
|
|
* \date 2012-05-05
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2012-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <util/retry.h>
|
|
#include <base/thread.h>
|
|
#include <base/signal.h>
|
|
#include <base/env.h>
|
|
#include <base/trace/events.h>
|
|
|
|
/* base-hw includes */
|
|
#include <kernel/interface.h>
|
|
|
|
using namespace Genode;
|
|
|
|
/********************
|
|
** Signal context **
|
|
********************/
|
|
|
|
void Signal_context::submit(unsigned) { PERR("not implemented"); }
|
|
|
|
/************************
|
|
** Signal transmitter **
|
|
************************/
|
|
|
|
void Signal_transmitter::submit(unsigned cnt)
|
|
{
|
|
{
|
|
Trace::Signal_submit trace_event(cnt);
|
|
}
|
|
Kernel::submit_signal(_context.dst(), cnt);
|
|
}
|
|
|
|
|
|
/*********************
|
|
** Signal_receiver **
|
|
*********************/
|
|
|
|
Signal_receiver::Signal_receiver()
|
|
{
|
|
retry<Pd_session::Out_of_metadata>(
|
|
[&] () {
|
|
_cap = env()->pd_session()->alloc_signal_source();
|
|
},
|
|
[&] () {
|
|
PINF("upgrading quota donation for PD session");
|
|
env()->parent()->upgrade(env()->pd_session_cap(), "ram_quota=8K");
|
|
}
|
|
);
|
|
}
|
|
|
|
|
|
void Signal_receiver::_platform_destructor()
|
|
{
|
|
/* release server resources of receiver */
|
|
env()->pd_session()->free_signal_source(_cap);
|
|
}
|
|
|
|
|
|
void Signal_receiver::_platform_begin_dissolve(Signal_context * const c)
|
|
{
|
|
Kernel::kill_signal_context(c->_cap.dst());
|
|
}
|
|
|
|
void Signal_receiver::_platform_finish_dissolve(Signal_context *) { }
|
|
|
|
|
|
Signal_context_capability Signal_receiver::manage(Signal_context * const c)
|
|
{
|
|
/* ensure that the context isn't managed already */
|
|
Lock::Guard contexts_guard(_contexts_lock);
|
|
Lock::Guard context_guard(c->_lock);
|
|
if (c->_receiver) { throw Context_already_in_use(); }
|
|
|
|
retry<Pd_session::Out_of_metadata>(
|
|
[&] () {
|
|
/* use signal context as imprint */
|
|
c->_cap = env()->pd_session()->alloc_context(_cap, (unsigned long)c);
|
|
c->_receiver = this;
|
|
_contexts.insert(&c->_receiver_le);
|
|
return c->_cap;
|
|
},
|
|
[&] () {
|
|
PINF("upgrading quota donation for PD session");
|
|
env()->parent()->upgrade(env()->pd_session_cap(), "ram_quota=8K");
|
|
}
|
|
);
|
|
|
|
return c->_cap;
|
|
}
|
|
|
|
|
|
void Signal_receiver::block_for_signal()
|
|
{
|
|
/* wait for a signal */
|
|
if (Kernel::await_signal(_cap.dst())) {
|
|
PERR("failed to receive signal");
|
|
return;
|
|
}
|
|
/* read signal data */
|
|
const void * const utcb = Thread_base::myself()->utcb()->base();
|
|
Signal::Data * const data = (Signal::Data *)utcb;
|
|
Signal_context * const context = data->context;
|
|
{
|
|
/* update signal context */
|
|
Lock::Guard lock_guard(context->_lock);
|
|
unsigned const num = context->_curr_signal.num + data->num;
|
|
context->_pending = true;
|
|
context->_curr_signal = Signal::Data(context, num);
|
|
}
|
|
/* end kernel-aided life-time management */
|
|
Kernel::ack_signal(data->context->_cap.dst());
|
|
}
|
|
|
|
|
|
void Signal_receiver::local_submit(Signal::Data) { PERR("not implemented"); }
|