183 lines
3.7 KiB
C++
183 lines
3.7 KiB
C++
/*
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* \brief L4/Fiasco protection domain facility
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* \author Christian Helmuth
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* \date 2006-04-11
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*
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* Protection domains are L4 tasks under Fiasco 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) 2006-2012 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 _CORE__INCLUDE__PLATFORM_PD_H_
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#define _CORE__INCLUDE__PLATFORM_PD_H_
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#include <platform_thread.h>
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namespace Fiasco {
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#include <l4/sys/types.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
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{
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private:
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enum {
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VERSION_BITS = 10,
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PD_FIRST = 0x10,
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PD_MAX = (1 << 11) - 1, /* leave 0x7ff free for L4_INVALID_ID */
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PD_VERSION_MAX = (1 << 10) - 1,
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PD_INVALID = -1,
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THREAD_MAX = (1 << 7),
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};
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unsigned _pd_id; /* plain pd number */
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unsigned _version; /* version number */
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Fiasco::l4_taskid_t _l4_task_id; /* L4 task ID */
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/**********************************************
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** Threads of this protection domain object **
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**********************************************/
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Platform_thread *_threads[THREAD_MAX];
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/**
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* Initialize thread allocator
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*/
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void _init_threads();
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/**
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* Thread iteration for one task
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*/
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Platform_thread *_next_thread();
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/**
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* Thread allocation
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*
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* Again a special case for Core thread0.
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*/
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int _alloc_thread(int thread_id, Platform_thread *thread);
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/**
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* Thread deallocation
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*
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* No special case for Core thread0 here - we just never call it.
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*/
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void _free_thread(int thread_id);
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/******************
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** PD allocator **
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******************/
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struct Pd_alloc
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{
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unsigned reserved : 1;
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unsigned free : 1;
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unsigned version : VERSION_BITS;
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Pd_alloc(bool r, bool f, unsigned v)
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: reserved(r), free(f), version(v) { }
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Pd_alloc() : reserved(0), free(0), version(0) { }
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};
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static Pd_alloc *_pds()
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{
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static Pd_alloc static_pds[PD_MAX];
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return static_pds;
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}
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/**
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* Protection-domain creation
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*
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* The syscall parameter propagates if any L4 kernel function
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* should be used. We need the special case for the Core startup.
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*/
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void _create_pd(bool syscall);
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/**
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* Protection domain destruction
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*
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* No special case for Core here - we just never call it.
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*/
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void _destroy_pd();
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/**
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* Protection domain allocation
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*
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* Find free L4 task and use it. We need the special case for Core
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* startup.
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*/
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int _alloc_pd(signed pd_id);
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/**
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* Protection domain deallocation
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*
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* No special case for Core here - we just never call it.
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*/
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void _free_pd();
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/***************
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** Debugging **
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***************/
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void _debug_log_pds(void);
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void _debug_log_threads(void);
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public:
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/**
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* Constructor
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*/
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Platform_pd(signed pd_id = PD_INVALID, bool create = true);
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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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* Initialize L4 task facility
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*/
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static void init();
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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) { return 0; }
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int pd_id() const { return _pd_id; }
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};
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}
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#endif /* _CORE__INCLUDE__PLATFORM_PD_H_ */
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