cfdbccc5c2
This is a redesign of the root and parent interfaces to eliminate blocking RPC calls. - New session representation at the parent (base/session_state.h) - base-internal root proxy mechanism as migration path - Redesign of base/service.h - Removes ancient 'Connection::KEEP_OPEN' feature - Interface change of 'Child', 'Child_policy', 'Slave', 'Slave_policy' - New 'Slave::Connection' - Changed child-construction procedure to be compatible with the non-blocking parent interface and to be easier to use - The child's initial LOG session, its binary ROM session, and the linker ROM session have become part of the child's envirenment. - Session upgrading must now be performed via 'env.upgrade' instead of performing a sole RPC call the parent. To make RAM upgrades easier, the 'Connection' provides a new 'upgrade_ram' method. Issue #2120
145 lines
4.4 KiB
C++
145 lines
4.4 KiB
C++
/*
|
|
* \brief Platform environment of Genode process
|
|
* \author Norman Feske
|
|
* \author Christian Helmuth
|
|
* \date 2006-07-28
|
|
*
|
|
* This file is a generic variant of the platform environment, which is
|
|
* suitable for platforms such as L4ka::Pistachio and L4/Fiasco. On other
|
|
* platforms, it may be replaced by a platform-specific version residing
|
|
* in the corresponding 'base-<platform>' repository.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2013 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__BASE__INTERNAL__PLATFORM_ENV_H_
|
|
#define _INCLUDE__BASE__INTERNAL__PLATFORM_ENV_H_
|
|
|
|
/* Genode includes */
|
|
#include <base/log.h>
|
|
#include <base/env.h>
|
|
#include <base/heap.h>
|
|
|
|
/* base-internal includes */
|
|
#include <base/internal/globals.h>
|
|
#include <base/internal/parent_cap.h>
|
|
#include <base/internal/attached_stack_area.h>
|
|
#include <base/internal/expanding_cpu_session_client.h>
|
|
#include <base/internal/expanding_region_map_client.h>
|
|
#include <base/internal/expanding_ram_session_client.h>
|
|
#include <base/internal/expanding_parent_client.h>
|
|
|
|
|
|
namespace Genode { class Platform_env; }
|
|
|
|
|
|
class Genode::Platform_env : public Env_deprecated,
|
|
public Expanding_parent_client::Emergency_ram_reserve
|
|
{
|
|
private:
|
|
|
|
Expanding_parent_client _parent_client;
|
|
|
|
struct Resources
|
|
{
|
|
template <typename T>
|
|
Capability<T> request(Parent &parent, Parent::Client::Id id)
|
|
{
|
|
return static_cap_cast<T>(parent.session_cap(id));
|
|
}
|
|
|
|
Expanding_ram_session_client ram;
|
|
Expanding_cpu_session_client cpu;
|
|
Pd_session_client pd;
|
|
Expanding_region_map_client rm;
|
|
|
|
Resources(Parent &parent)
|
|
:
|
|
ram(request<Ram_session>(parent, Parent::Env::ram()),
|
|
Parent::Env::ram()),
|
|
cpu(request<Cpu_session>(parent, Parent::Env::cpu()),
|
|
Parent::Env::cpu()),
|
|
pd (request<Pd_session> (parent, Parent::Env::pd())),
|
|
rm (pd, pd.address_space(), Parent::Env::pd())
|
|
{ }
|
|
};
|
|
|
|
Resources _resources;
|
|
|
|
Heap _heap;
|
|
|
|
/*
|
|
* The '_heap' must be initialized before the '_stack_area'
|
|
* because the 'Local_parent' performs a dynamic memory allocation
|
|
* due to the creation of the stack area's sub-RM session.
|
|
*/
|
|
Attached_stack_area _stack_area { _parent_client, _resources.pd };
|
|
|
|
char _initial_heap_chunk[sizeof(addr_t) * 4096];
|
|
|
|
/*
|
|
* Emergency RAM reserve
|
|
*
|
|
* See the comment of '_fallback_sig_cap()' in 'env/env.cc'.
|
|
*/
|
|
constexpr static size_t _emergency_ram_size() { return 16*1024; }
|
|
Ram_dataspace_capability _emergency_ram_ds;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Standard constructor
|
|
*/
|
|
Platform_env()
|
|
:
|
|
_parent_client(Genode::parent_cap(), *this),
|
|
_resources(_parent_client),
|
|
_heap(&_resources.ram, &_resources.rm, Heap::UNLIMITED,
|
|
_initial_heap_chunk, sizeof(_initial_heap_chunk)),
|
|
_emergency_ram_ds(_resources.ram.alloc(_emergency_ram_size()))
|
|
{
|
|
env_stack_area_ram_session = &_resources.ram;
|
|
env_stack_area_region_map = &_stack_area;
|
|
}
|
|
|
|
/*
|
|
* Support functions for implementing fork on Noux.
|
|
*/
|
|
void reinit(Native_capability::Raw) override;
|
|
void reinit_main_thread(Capability<Region_map> &) override;
|
|
|
|
|
|
/*************************************
|
|
** Emergency_ram_reserve interface **
|
|
*************************************/
|
|
|
|
void release() {
|
|
|
|
log("used before freeing emergency=", _resources.ram.used());
|
|
_resources.ram.free(_emergency_ram_ds);
|
|
log("used after freeing emergency=", _resources.ram.used());
|
|
}
|
|
|
|
|
|
/******************************
|
|
** Env_deprecated interface **
|
|
******************************/
|
|
|
|
Parent *parent() override { return &_parent_client; }
|
|
Ram_session *ram_session() override { return &_resources.ram; }
|
|
Ram_session_capability ram_session_cap() override { return _resources.ram; }
|
|
Cpu_session *cpu_session() override { return &_resources.cpu; }
|
|
Cpu_session_capability cpu_session_cap() override { return _resources.cpu; }
|
|
Region_map *rm_session() override { return &_resources.rm; }
|
|
Pd_session *pd_session() override { return &_resources.pd; }
|
|
Pd_session_capability pd_session_cap() override { return _resources.pd; }
|
|
Allocator *heap() override { return &_heap; }
|
|
};
|
|
|
|
#endif /* _INCLUDE__BASE__INTERNAL__PLATFORM_ENV_H_ */
|