/*
* \brief Loader session interface
* \author Christian Prochaska
* \author Norman Feske
* \date 2009-10-05
*/
/*
* Copyright (C) 2009-2013 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.
*/
#ifndef _INCLUDE__LOADER_SESSION__LOADER_SESSION_H_
#define _INCLUDE__LOADER_SESSION__LOADER_SESSION_H_
#include
#include
#include
#include
#include
#include
namespace Loader {
using namespace Genode;
struct Session : Genode::Session
{
/*
* Resolve ambiguity of 'size_t' type when using 'loader_session.h'
* together with libc headers.
*/
typedef Genode::size_t size_t;
/*
* Exception types
*/
struct Exception : Genode::Exception { };
struct View_does_not_exist : Exception { };
struct Rom_module_does_not_exist : Exception { };
/**
* Return argument of 'view_geometry()'
*/
struct View_geometry
{
int width, height;
int buf_x, buf_y;
View_geometry(): width(0), height(0), buf_x(0), buf_y() {}
View_geometry(int w, int h, int x, int y): width(w), height(h), buf_x(x), buf_y(y) {}
};
typedef Genode::Rpc_in_buffer<64> Name;
typedef Genode::Rpc_in_buffer<128> Path;
static const char *service_name() { return "Loader"; }
virtual ~Session() { }
/**
* Allocate dataspace to be used as ROM module by the loaded subsystem
*
* \param name designated name of the ROM module
* \param size size of ROM module
*
* \return Dataspace_capability dataspace that contains the backing
* store of the ROM module
*
* The content of the dataspace is made visible to the loaded subsystem
* not before 'commit_rom_module' has been called. This two-step
* procedure enables the client to update the content of the ROM module
* during the lifetime of the session by subsequently calling dataspace
* with the same name as argument. Each time, a new dataspace is
* allocated but not yet presented to the loaded subsystem. When
* calling 'commit_rom_module', the most recently allocated dataspace
* becomes visible. The server frees intermediate dataspaces that are
* no longer used.
*/
virtual Dataspace_capability alloc_rom_module(Name const &name, size_t size) = 0;
/**
* Expose ROM module to loaded subsystem
*
* \throw Rom_module_does_not_exist if the ROM module name wasn't
* allocated beforehand
*/
virtual void commit_rom_module(Name const &name) = 0;
/**
* Define RAM quota assigned to the subsystem
*
* The quantum specified must be in the bounds of the quota attached
* the session. Note that RAM resources used for ROM modules are
* accounted, too. If ROM modules are modified at runtime by subsequent
* calls of 'alloc_rom_module', the resources needed for the respective
* ROM modules are doubled.
*
* If 'ram_quota' is not called prior calling 'start', all available
* session resources will be assigned to the subsystem.
*/
virtual void ram_quota(size_t quantum) = 0;
/**
* Constrain size of the nitpicker buffer used by the subsystem
*
* Calling this function prior 'start()' enables the virtualization
* of the nitpicker session interface.
*/
virtual void constrain_geometry(int width, int height) = 0;
/**
* Register signal handler notified at creation time of the first view
*/
virtual void view_ready_sigh(Signal_context_capability sigh) = 0;
/**
* Register signal handler notified when a failure occurs in the
* loaded subsystem.
*
* This signal is delivered if any child process of the subsystem
* produces an unresolvable page fault, exists, or triggers a CPU
* exception. (e.g., division by zero) For more information about
* the possible types of faults, please refer to the documentation of
* 'Rm_session::fault_handler' and 'Cpu_session::exception_handler'.
*
* This function should not be called after the 'start' function.
*/
virtual void fault_sigh(Signal_context_capability sigh) = 0;
/**
* Start subsystem
*
* \throw Rom_module_does_not_exist if the specified binary could
* not obtained as ROM module
*/
virtual void start(Name const &binary, Name const &label = "",
Native_pd_args const &pd_args = Native_pd_args()) = 0;
/**
* Return first nitpicker view created by the loaded subsystem
*
* \throw View_does_not_exist
*/
virtual Nitpicker::View_capability view() = 0;
/**
* Return view geometry as initialized by the loaded subsystem
*
* \throw View_does_not_exist
*/
virtual View_geometry view_geometry() = 0;
/*******************
** RPC interface **
*******************/
GENODE_RPC(Rpc_alloc_rom_module, Dataspace_capability, alloc_rom_module,
Name const &, size_t);
GENODE_RPC_THROW(Rpc_commit_rom_module, void, commit_rom_module,
GENODE_TYPE_LIST(Rom_module_does_not_exist),
Name const &);
GENODE_RPC(Rpc_ram_quota, void, ram_quota, size_t);
GENODE_RPC(Rpc_constrain_geometry, void, constrain_geometry, int, int);
GENODE_RPC(Rpc_view_ready_sigh, void, view_ready_sigh, Signal_context_capability);
GENODE_RPC(Rpc_fault_sigh, void, fault_sigh, Signal_context_capability);
GENODE_RPC_THROW(Rpc_start, void, start,
GENODE_TYPE_LIST(Rom_module_does_not_exist),
Name const &, Name const &, Native_pd_args const &);
GENODE_RPC_THROW(Rpc_view, Nitpicker::View_capability, view,
GENODE_TYPE_LIST(View_does_not_exist));
GENODE_RPC(Rpc_view_geometry, View_geometry, view_geometry);
GENODE_RPC_INTERFACE(Rpc_alloc_rom_module, Rpc_commit_rom_module,
Rpc_ram_quota, Rpc_constrain_geometry,
Rpc_view_ready_sigh, Rpc_fault_sigh, Rpc_start,
Rpc_view, Rpc_view_geometry);
};
}
#endif /* _INCLUDE__LOADER_SESSION__LOADER_SESSION_H_ */