182 lines
3.5 KiB
C++
182 lines
3.5 KiB
C++
/*
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* \brief Thread facility
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* \author Norman Feske
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* \date 2015-05-01
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*/
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/*
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* Copyright (C) 2015 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_THREAD_H_
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#define _CORE__INCLUDE__PLATFORM_THREAD_H_
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/* Genode includes */
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#include <base/thread_state.h>
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#include <base/native_types.h>
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#include <util/string.h>
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/* core includes */
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#include <pager.h>
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#include <ipc_pager.h>
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#include <address_space.h>
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#include <thread_sel4.h>
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#include <install_mapping.h>
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namespace Genode {
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class Platform_pd;
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class Platform_thread;
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}
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class Genode::Platform_thread : public List<Platform_thread>::Element
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{
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private:
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Pager_object *_pager = nullptr;
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String<128> _name;
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/**
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* Virtual address of the IPC buffer within the PDs address space
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*
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* The value is 0 for the PD's main thread. For all other threads,
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* the value is somewhere within the stack area.
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*/
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addr_t const _utcb;
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Thread_info _info;
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Cap_sel const _pager_obj_sel;
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/*
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* Selectors within the PD's CSpace
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*
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* Allocated when the thread is started.
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*/
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Cap_sel _fault_handler_sel { 0 };
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Cap_sel _ep_sel { 0 };
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friend class Platform_pd;
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Platform_pd *_pd = nullptr;
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enum { INITIAL_IPC_BUFFER_VIRT = 0x1000 };
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public:
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/**
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* Constructor
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*/
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Platform_thread(size_t, const char *name = 0, unsigned priority = 0,
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addr_t utcb = 0);
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/**
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* Destructor
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*/
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~Platform_thread();
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/**
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* Start thread
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*
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* \param ip instruction pointer to start at
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* \param sp stack pointer to use
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* \param cpu_no target cpu
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*
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* \retval 0 successful
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* \retval -1 thread could not be started
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*/
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int start(void *ip, void *sp, unsigned int cpu_no = 0);
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/**
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* Pause this thread
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*/
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void pause();
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/**
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* Resume this thread
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*/
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void resume();
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/**
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* Cancel currently blocking operation
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*/
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void cancel_blocking();
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/**
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* Override thread state with 's'
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*
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* \throw Cpu_session::State_access_failed
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*/
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void state(Thread_state s);
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/**
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* Read thread state
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*
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* \throw Cpu_session::State_access_failed
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*/
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Thread_state state();
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/**
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* Return the address space to which the thread is bound
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*/
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Weak_ptr<Address_space> address_space();
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/**
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* Return execution time consumed by the thread
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*/
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unsigned long long execution_time() const { return 0; }
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/************************
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** Accessor functions **
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************************/
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/**
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* Set pager capability
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*/
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Pager_object *pager(Pager_object *pager) const { return _pager; }
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void pager(Pager_object *pager) { _pager = pager; }
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Pager_object *pager() { return _pager; }
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/**
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* Return identification of thread when faulting
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*/
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unsigned long pager_object_badge() const { return _pager_obj_sel.value(); }
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/**
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* Set the executing CPU for this thread
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*/
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void affinity(Affinity::Location) { }
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/**
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* Get the executing CPU for this thread
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*/
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Affinity::Location affinity() const { return Affinity::Location(); }
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/**
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* Set CPU quota of the thread
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*/
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void quota(size_t) { /* not supported */ }
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/**
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* Get thread name
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*/
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const char *name() const { return "noname"; }
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/*****************************
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** seL4-specific interface **
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*****************************/
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Cap_sel tcb_sel() const { return _info.tcb_sel; }
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void install_mapping(Mapping const &mapping);
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};
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#endif /* _CORE__INCLUDE__PLATFORM_THREAD_H_ */
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