105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
/**
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* \brief Platform specific parts of the thread API
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* \author Martin Stein
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* \date 2012-02-12
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*/
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/*
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* Copyright (C) 2012-2013 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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/* Genode includes */
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#include <base/thread.h>
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#include <base/printf.h>
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#include <base/sleep.h>
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#include <base/env.h>
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using namespace Genode;
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extern Native_utcb * __initial_sp;
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namespace Genode { Rm_session *env_context_area_rm_session(); }
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/*****************
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** Thread_base **
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*****************/
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Native_utcb * Thread_base::utcb()
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{
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/* this is a main thread, so CRT0 provides UTCB through '_main_utcb' */
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if (!this) return __initial_sp;
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/* otherwise we have a valid thread base */
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return &_context->utcb;
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}
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void Thread_base::_thread_start()
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{
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Thread_base::myself()->_thread_bootstrap();
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Thread_base::myself()->entry();
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Thread_base::myself()->_join_lock.unlock();
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Genode::sleep_forever();
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}
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void Thread_base::_init_platform_thread() { }
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void Thread_base::_deinit_platform_thread()
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{
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/* detach UTCB */
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size_t const size = sizeof(_context->utcb);
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addr_t utcb = Context_allocator::addr_to_base(_context) +
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Native_config::context_virtual_size() - size -
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Native_config::context_area_virtual_base();
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env_context_area_rm_session()->detach(utcb);
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/* destroy object at the CPU session */
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env()->cpu_session()->kill_thread(_thread_cap);
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env()->rm_session()->remove_client(_pager_cap);
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}
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void Thread_base::start()
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{
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/* create thread at core */
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char buf[48];
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name(buf, sizeof(buf));
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Cpu_session * cpu = env()->cpu_session();
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_thread_cap = cpu->create_thread(buf, (addr_t)&_context->utcb);
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/* assign thread to protection domain */
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env()->pd_session()->bind_thread(_thread_cap);
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/* create new pager object and assign it to the new thread */
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_pager_cap = env()->rm_session()->add_client(_thread_cap);
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env()->cpu_session()->set_pager(_thread_cap, _pager_cap);
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/* attach UTCB */
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try {
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Ram_dataspace_capability ds = env()->cpu_session()->utcb(_thread_cap);
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size_t const size = sizeof(_context->utcb);
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addr_t dst = Context_allocator::addr_to_base(_context) +
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Native_config::context_virtual_size() - size -
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Native_config::context_area_virtual_base();
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env_context_area_rm_session()->attach_at(ds, dst, size);
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} catch (...) {
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PERR("%s: Failed to attach UTCB", __PRETTY_FUNCTION__);
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sleep_forever();
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}
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/* start thread with its initial IP and aligned SP */
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addr_t thread_sp = (addr_t)&_context->stack[-4];
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thread_sp &= ~0xf;
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env()->cpu_session()->start(_thread_cap, (addr_t)_thread_start, thread_sp);
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}
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void Thread_base::cancel_blocking() {
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env()->cpu_session()->cancel_blocking(_thread_cap); }
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