226 lines
6.3 KiB
C++
226 lines
6.3 KiB
C++
/*
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* \brief Core-specific instance of the CPU session/thread interfaces
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* \author Christian Helmuth
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* \author Stefan Kalkowski
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* \date 2006-07-17
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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__CPU_SESSION_COMPONENT_H_
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#define _CORE__INCLUDE__CPU_SESSION_COMPONENT_H_
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/* Genode includes */
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#include <util/list.h>
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#include <base/allocator_guard.h>
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#include <base/tslab.h>
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#include <base/lock.h>
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#include <base/pager.h>
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#include <base/rpc_server.h>
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#include <foc_cpu_session/foc_cpu_session.h>
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/* core includes */
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#include <platform_thread.h>
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namespace Genode {
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/**
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* RPC interface of CPU thread
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*
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* We make 'Cpu_thread' a RPC object only to be able to lookup CPU threads
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* from thread capabilities supplied as arguments to CPU-session functions.
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* A CPU thread does not provide an actual RPC interface.
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*/
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struct Cpu_thread
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{
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GENODE_RPC_INTERFACE();
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};
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class Cpu_thread_component : public Rpc_object<Cpu_thread>,
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public List<Cpu_thread_component>::Element
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{
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private:
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Platform_thread _platform_thread;
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bool _bound; /* pd binding flag */
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Signal_context_capability _sigh; /* exception handler */
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public:
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Cpu_thread_component(const char *name, unsigned priority, addr_t utcb,
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Signal_context_capability sigh)
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:
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_platform_thread(name, priority), _bound(false), _sigh(sigh)
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{
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update_exception_sigh();
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}
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/************************
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** Accessor functions **
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************************/
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inline Platform_thread * platform_thread() { return &_platform_thread; }
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inline bool bound() const { return _bound; }
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inline void bound(bool b) { _bound = b; }
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void sigh(Signal_context_capability sigh)
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{
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sigh = sigh;
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update_exception_sigh();
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}
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/**
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* Propagate exception handler to platform thread
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*/
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void update_exception_sigh();
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};
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class Cpu_session_component : public Rpc_object<Foc_cpu_session>
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{
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private:
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/**
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* Allocator used for managing the CPU threads associated with the
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* CPU session
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*/
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typedef Tslab<Cpu_thread_component, 1024> Cpu_thread_allocator;
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Rpc_entrypoint *_thread_ep;
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Pager_entrypoint *_pager_ep;
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Allocator_guard _md_alloc; /* guarded meta-data allocator */
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Cpu_thread_allocator _thread_alloc; /* meta-data allocator */
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Lock _thread_alloc_lock; /* protect alloc access */
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List<Cpu_thread_component> _thread_list;
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Lock _thread_list_lock; /* protect thread list */
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unsigned _priority; /* priority of threads
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created with this
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session */
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/**
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* Exception handler that will be invoked unless overridden by a
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* call of 'Cpu_session::exception_handler'.
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*/
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Signal_context_capability _default_exception_handler;
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/**
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* Lookup thread in CPU session by its capability
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*
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* \retval NULL thread capability is invalid or
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* does not belong to the CPU session
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*/
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Cpu_thread_component *_lookup_thread(Thread_capability thread) {
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return dynamic_cast<Cpu_thread_component *>
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(_thread_ep->obj_by_cap(thread)); }
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/**
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* Raw thread-killing functionality
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*
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* This function is called from the 'kill_thread' function and
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* the destructor. Each these functions grab the list lock
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* by themselves and call this function to perform the actual
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* killing.
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*/
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void _unsynchronized_kill_thread(Cpu_thread_component *thread);
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public:
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/**
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* Constructor
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*/
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Cpu_session_component(Rpc_entrypoint *thread_ep,
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Pager_entrypoint *pager_ep,
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Allocator *md_alloc, const char *args);
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/**
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* Destructor
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*/
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~Cpu_session_component();
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/**
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* Register quota donation at allocator guard
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*/
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void upgrade_ram_quota(size_t ram_quota) { _md_alloc.upgrade(ram_quota); }
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/***************************
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** CPU session interface **
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***************************/
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Thread_capability create_thread(Name const &, addr_t);
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Ram_dataspace_capability utcb(Thread_capability thread);
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void kill_thread(Thread_capability);
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Thread_capability first();
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Thread_capability next(Thread_capability);
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int set_pager(Thread_capability, Pager_capability);
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int start(Thread_capability, addr_t, addr_t);
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void pause(Thread_capability thread_cap);
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void resume(Thread_capability thread_cap);
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void single_step(Thread_capability thread_cap, bool enable);
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void cancel_blocking(Thread_capability);
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int name(Thread_capability, char *, size_t);
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Thread_state state(Thread_capability);
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void state(Thread_capability, Thread_state const &);
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void exception_handler(Thread_capability, Signal_context_capability);
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unsigned num_cpus() const;
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void affinity(Thread_capability, unsigned);
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/***********************************
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** Fiasco.OC specific extensions **
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***********************************/
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void enable_vcpu(Thread_capability, addr_t);
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Native_capability native_cap(Thread_capability);
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Native_capability alloc_irq();
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};
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class Cpu_session_irqs : public Avl_node<Cpu_session_irqs>
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{
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private:
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enum { IRQ_MAX = 20 };
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Cpu_session_component* _owner;
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Native_capability _irqs[IRQ_MAX];
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unsigned _cnt;
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public:
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Cpu_session_irqs(Cpu_session_component *owner)
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: _owner(owner), _cnt(0) {}
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bool add(Native_capability irq)
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{
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if (_cnt >= (IRQ_MAX - 1))
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return false;
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_irqs[_cnt++] = irq;
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return true;
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}
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/************************
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** Avl node interface **
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************************/
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bool higher(Cpu_session_irqs *c) { return (c->_owner > _owner); }
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Cpu_session_irqs *find_by_session(Cpu_session_component *o)
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{
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if (o == _owner) return this;
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Cpu_session_irqs *c = Avl_node<Cpu_session_irqs>::child(o > _owner);
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return c ? c->find_by_session(o) : 0;
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}
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};
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}
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#endif /* _CORE__INCLUDE__CPU_SESSION_COMPONENT_H_ */
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