9f73476b37
The new 'dde_linux' repository will host device drivers ported from the Linux kernel. In contrast to the original 'linux_drivers' repository, 'dde_linux' does not contain any 3rd-party source code. To download the Linux kernel source code and extract the drivers, execute the 'make prepare' rule of the top-level Makefile. The initial version of the 'dde_linux' repository comes with an USB driver. The porting methodology follows the path of the Intel GEM port. Instead of attempting to provide a generic Linux environment that works across drivers, each driver comes with a specially tailored DDE. The DDE consists of Genode-specific implementations of Linux API functions as declared in 'lx_emul.h'. Most of these functions are dummies that must merely be provided to resolve dependencies at the linking stage. They are called by unused code-paths. As of now, the USB driver support UHCI, EHCI on the x86_32 platform. I exposes USB HID devices and USB storage devices via Genode's input-session and block-session respectively. The USB driver is accompanied with two run scripts 'run/usb_hid.run' and 'run/usb_storage.run'.
122 lines
2.0 KiB
C++
122 lines
2.0 KiB
C++
/*
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* \brief Main-signal receiver and signal-helper functions
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* \author Sebastian Sumpf <sebastian.sumpf@genode-labs.com>
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* \date 2012-05-23
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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 _SIGNAL_H_
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#define _SIGNAL_H_
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#include <base/env.h>
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#include <base/printf.h>
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#include <base/signal.h>
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#include "routine.h"
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/**
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* Context base for IRQ, Timer, etc.
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*/
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class Driver_context : public Genode::Signal_context
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{
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public:
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/**
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* Perform context operation
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*/
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virtual void handle() = 0;
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};
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/**
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* This singelton currently received all signals
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*/
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class Service_handler
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{
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private:
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Genode::Signal_receiver *_receiver;
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Service_handler() { }
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public:
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static Service_handler * s()
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{
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static Service_handler _s;
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return &_s;
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}
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void receiver(Genode::Signal_receiver *recv) { _receiver = recv; }
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/**
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* Dispatch for wait for signal
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*/
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void process()
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{
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if (Routine::all()) {
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Routine::schedule();
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return;
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}
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do {
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Genode::Signal s = _receiver->wait_for_signal();
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/* handle signal IRQ, timer, or event signals */
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Driver_context *ctx = static_cast<Driver_context *>(s.context());
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ctx->handle();
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} while (_receiver->pending());
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}
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};
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/**
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* Helper that holds sender and receiver
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*/
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class Signal_helper
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{
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private:
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Genode::Signal_receiver *_receiver;
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Genode::Signal_transmitter *_sender;
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public:
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Signal_helper(Genode::Signal_receiver *recv)
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: _receiver(recv),
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_sender(new (Genode::env()->heap()) Genode::Signal_transmitter()) { }
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Genode::Signal_receiver *receiver() const { return _receiver; }
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Genode::Signal_transmitter *sender() const { return _sender; }
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};
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namespace Timer
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{
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void init(Genode::Signal_receiver *recv);
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}
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namespace Irq
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{
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void init(Genode::Signal_receiver *recv);
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}
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namespace Event
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{
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void init(Genode::Signal_receiver *recv);
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}
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namespace Storage
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{
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void init(Genode::Signal_receiver *recv);
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}
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#endif /* _SIGNAL_H_ */
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