62b1c55399
This patch integrates the functionality of the former CAP session into the PD session and unifies the approch of supplementing the generic PD session with kernel-specific functionality. The latter is achieved by the new 'Native_pd' interface. The kernel-specific interface can be obtained via the Pd_session::native_pd accessor function. The kernel-specific interfaces are named Nova_native_pd, Foc_native_pd, and Linux_native_pd. The latter change allowed for to deduplication of the pd_session_component code among the various base platforms. To retain API compatibility, we keep the 'Cap_session' and 'Cap_connection' around. But those classes have become mere wrappers around the PD session interface. Issue #1841
122 lines
2.6 KiB
C++
122 lines
2.6 KiB
C++
/*
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* \brief L4/Fiasco protection domain facility
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* \author Christian Helmuth
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* \author Stefan Kalkowski
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* \date 2006-04-11
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*
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* Protection domains are L4 tasks under Fiasco.OC and serve as base
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* container for the platform.
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*/
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/*
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* Copyright (C) 2006-2013 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 _CORE__INCLUDE__PLATFORM_PD_H_
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#define _CORE__INCLUDE__PLATFORM_PD_H_
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/* Genode includes */
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#include <base/allocator_avl.h>
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#include <base/exception.h>
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#include <base/synced_allocator.h>
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#include <platform_thread.h>
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#include <base/thread.h>
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/* core includes */
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#include <cap_mapping.h>
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#include <address_space.h>
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/* Fiasco.OC includes */
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namespace Fiasco {
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#include <l4/sys/consts.h>
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}
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namespace Genode {
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class Platform_thread;
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class Platform_pd : public Address_space
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{
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private:
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enum {
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THREAD_MAX = (1 << 7),
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UTCB_AREA_SIZE = (THREAD_MAX * Fiasco::L4_UTCB_OFFSET),
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};
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addr_t utcb_area_start()
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{
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return (Native_config::context_area_virtual_base() +
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THREAD_MAX * Native_config::context_virtual_size());
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}
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Cap_mapping _task;
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Cap_mapping _parent;
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Platform_thread *_threads[THREAD_MAX];
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public:
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class Threads_exhausted : Exception {};
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/**
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* Constructor for core.
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*/
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Platform_pd(Core_cap_index*);
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/**
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* Constructor for all tasks except core.
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*/
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Platform_pd(Allocator *, char const *label);
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/**
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* Destructor
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*/
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~Platform_pd();
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/**
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* Bind thread to protection domain
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*
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* \return 0 on success or
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* -1 if thread ID allocation failed.
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*
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* This function allocates the physical L4 thread ID.
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*/
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int bind_thread(Platform_thread *thread);
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/**
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* Unbind thread from protection domain
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*
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* Free the thread's slot and update thread object.
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*/
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void unbind_thread(Platform_thread *thread);
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/**
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* Assign parent interface to protection domain
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*/
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int assign_parent(Native_capability parent);
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/*******************************
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** Fiasco-specific Accessors **
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*******************************/
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Native_capability native_task() { return _task.local; }
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/*****************************
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** Address-space interface **
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*****************************/
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/*
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* On Fiasco.OC, we don't use directed unmap but rely on the
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* in-kernel mapping database. See 'rm_session_support.cc'.
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*/
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void flush(addr_t, size_t) { PDBG("not implemented"); }
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};
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}
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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