107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/*
|
|
* \brief Thread initialization
|
|
* \author Martin stein
|
|
* \date 2013-02-15
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/thread.h>
|
|
#include <base/env.h>
|
|
|
|
/* base-hw includes */
|
|
#include <kernel/interface.h>
|
|
|
|
using namespace Genode;
|
|
|
|
Ram_dataspace_capability _main_thread_utcb_ds;
|
|
|
|
Native_thread_id _main_thread_id;
|
|
|
|
namespace Genode { Rm_session * env_context_area_rm_session(); }
|
|
|
|
|
|
/**************************
|
|
** Native types support **
|
|
**************************/
|
|
|
|
Native_thread_id Genode::thread_get_my_native_id()
|
|
{
|
|
Thread_base * const t = Thread_base::myself();
|
|
return t ? t->tid().thread_id : _main_thread_id;
|
|
}
|
|
|
|
|
|
/*****************************
|
|
** Startup library support **
|
|
*****************************/
|
|
|
|
void prepare_init_main_thread()
|
|
{
|
|
using namespace Genode;
|
|
|
|
/*
|
|
* Make data from the startup info persistantly available by copying it
|
|
* before the UTCB gets polluted by the following function calls.
|
|
*/
|
|
Native_utcb * const utcb = Thread_base::myself()->utcb();
|
|
_main_thread_id = utcb->start_info()->thread_id();
|
|
_main_thread_utcb_ds =
|
|
reinterpret_cap_cast<Ram_dataspace>(utcb->start_info()->utcb_ds());
|
|
}
|
|
|
|
|
|
void prepare_reinit_main_thread() { prepare_init_main_thread(); }
|
|
|
|
|
|
/*****************
|
|
** Thread_base **
|
|
*****************/
|
|
|
|
void Thread_base::_thread_bootstrap()
|
|
{
|
|
Native_utcb * const utcb = Thread_base::myself()->utcb();
|
|
_tid.thread_id = utcb->start_info()->thread_id();
|
|
}
|
|
|
|
|
|
void Thread_base::_init_platform_thread(Type type)
|
|
{
|
|
/* if no cpu session is given, use it from the environment */
|
|
if (!_cpu_session)
|
|
_cpu_session = env()->cpu_session();
|
|
|
|
/* nothing platform specific to do if this is not a special thread */
|
|
if (type == NORMAL)
|
|
{
|
|
/* create server object */
|
|
char buf[48];
|
|
name(buf, sizeof(buf));
|
|
_thread_cap = _cpu_session->create_thread(buf, (addr_t)&_context->utcb);
|
|
return;
|
|
}
|
|
|
|
/* if we got reinitialized we have to get rid of the old UTCB */
|
|
size_t const utcb_size = sizeof(Native_utcb);
|
|
addr_t const context_area = Native_config::context_area_virtual_base();
|
|
addr_t const utcb_new = (addr_t)&_context->utcb - context_area;
|
|
Rm_session * const rm = env_context_area_rm_session();
|
|
if (type == REINITIALIZED_MAIN) { rm->detach(utcb_new); }
|
|
|
|
/* remap initial main-thread UTCB according to context-area spec */
|
|
try { rm->attach_at(_main_thread_utcb_ds, utcb_new, utcb_size); }
|
|
catch(...) {
|
|
PERR("failed to re-map UTCB");
|
|
while (1) ;
|
|
}
|
|
/* adjust initial object state in case of a main thread */
|
|
tid().thread_id = _main_thread_id;
|
|
_thread_cap = env()->parent()->main_thread_cap();
|
|
}
|