4d442bca30
This patch reduces the number of exception types by facilitating globally defined exceptions for common usage patterns shared by most services. In particular, RPC functions that demand a session-resource upgrade not longer reflect this condition via a session-specific exception but via the 'Out_of_ram' or 'Out_of_caps' types. Furthermore, the 'Parent::Service_denied', 'Parent::Unavailable', 'Root::Invalid_args', 'Root::Unavailable', 'Service::Invalid_args', 'Service::Unavailable', and 'Local_service::Factory::Denied' types have been replaced by the single 'Service_denied' exception type defined in 'session/session.h'. This consolidation eases the error handling (there are fewer exceptions to handle), alleviates the need to convert exceptions along the session-creation call chain, and avoids possible aliasing problems (catching the wrong type with the same name but living in a different scope).
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/*
|
|
* \brief Core-specific instance of the IO_PORT session interface
|
|
* \author Christian Helmuth
|
|
* \date 2007-04-17
|
|
*
|
|
* We assume Core is running on IOPL3.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2007-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _CORE__INCLUDE__IO_PORT_SESSION_COMPONENT_H_
|
|
#define _CORE__INCLUDE__IO_PORT_SESSION_COMPONENT_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/allocator.h>
|
|
#include <base/rpc_server.h>
|
|
#include <io_port_session/io_port_session.h>
|
|
|
|
/* core includes */
|
|
#include <dataspace_component.h>
|
|
|
|
namespace Genode {
|
|
|
|
class Io_port_session_component : public Rpc_object<Io_port_session>
|
|
{
|
|
private:
|
|
|
|
Range_allocator *_io_port_alloc;
|
|
unsigned short _base;
|
|
unsigned short _size;
|
|
|
|
/**
|
|
* Check if access exceeds range
|
|
*/
|
|
bool _in_bounds(unsigned short address, unsigned width) {
|
|
return (address >= _base) && (address + width <= _base + _size); }
|
|
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* \param io_port_alloc IO_PORT region allocator
|
|
* \param args session construction arguments, in
|
|
* particular port base and size
|
|
* \throw Service_denied
|
|
*/
|
|
Io_port_session_component(Range_allocator *io_port_alloc,
|
|
const char *args);
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Io_port_session_component();
|
|
|
|
|
|
/*******************************
|
|
** Io-port session interface **
|
|
*******************************/
|
|
|
|
unsigned char inb(unsigned short);
|
|
unsigned short inw(unsigned short);
|
|
unsigned inl(unsigned short);
|
|
|
|
void outb(unsigned short, unsigned char);
|
|
void outw(unsigned short, unsigned short);
|
|
void outl(unsigned short, unsigned);
|
|
};
|
|
}
|
|
|
|
#endif /* _CORE__INCLUDE__IO_PORT_SESSION_COMPONENT_H_ */
|