327cdfdf36
ref #589
211 lines
5.3 KiB
C++
211 lines
5.3 KiB
C++
/*
|
|
* \brief Thread facility
|
|
* \author Martin Stein
|
|
* \date 2012-02-12
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2012-2013 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.
|
|
*/
|
|
|
|
/* core includes */
|
|
#include <platform_thread.h>
|
|
#include <core_env.h>
|
|
#include <rm_session_component.h>
|
|
|
|
using namespace Genode;
|
|
|
|
namespace Kernel { unsigned core_id(); }
|
|
|
|
|
|
bool Platform_thread::_attaches_utcb_by_itself()
|
|
{
|
|
/*
|
|
* If this is a main thread outside of core it'll not manage its
|
|
* virtual context area by itself, as it is done for other threads
|
|
* through a sub RM-session.
|
|
*/
|
|
return _pd_id == Kernel::core_id() || !main_thread();
|
|
}
|
|
|
|
|
|
Weak_ptr<Address_space> Platform_thread::address_space()
|
|
{
|
|
return _address_space;
|
|
}
|
|
|
|
|
|
Platform_thread::~Platform_thread()
|
|
{
|
|
/* detach UTCB */
|
|
if (!_attaches_utcb_by_itself()) {
|
|
|
|
/* the RM client may be destructed before platform thread */
|
|
if (_rm_client) {
|
|
Rm_session_component * const rm = _rm_client->member_rm_session();
|
|
rm->detach(_virt_utcb);
|
|
}
|
|
}
|
|
/* free UTCB */
|
|
if (_pd_id == Kernel::core_id()) {
|
|
Range_allocator * const ram = platform()->ram_alloc();
|
|
ram->free((void *)_phys_utcb, sizeof(Native_utcb));
|
|
} else {
|
|
Ram_session_component * const ram =
|
|
dynamic_cast<Ram_session_component *>(core_env()->ram_session());
|
|
assert(ram);
|
|
ram->free(_utcb);
|
|
}
|
|
/* release from pager */
|
|
if (_rm_client) {
|
|
Pager_object * const object = dynamic_cast<Pager_object *>(_rm_client);
|
|
assert(object);
|
|
Rm_session_component * const rm = _rm_client->member_rm_session();
|
|
assert(rm);
|
|
Pager_capability cap = reinterpret_cap_cast<Pager_object>(object->cap());
|
|
rm->remove_client(cap);
|
|
}
|
|
/* destroy object at the kernel */
|
|
Kernel::delete_thread(_id);
|
|
}
|
|
|
|
Platform_thread::Platform_thread(const char * name,
|
|
Thread_base * const thread_base,
|
|
size_t const stack_size, unsigned const pd_id)
|
|
:
|
|
_thread_base(thread_base), _stack_size(stack_size),
|
|
_pd_id(pd_id), _rm_client(0), _virt_utcb(0), _main_thread(0)
|
|
{
|
|
strncpy(_name, name, NAME_MAX_LEN);
|
|
|
|
/* create UTCB for a core thread */
|
|
Range_allocator * const ram = platform()->ram_alloc();
|
|
if (!ram->alloc_aligned(sizeof(Native_utcb), (void **)&_phys_utcb,
|
|
MIN_MAPPING_SIZE_LOG2).is_ok())
|
|
{
|
|
PERR("failed to allocate UTCB");
|
|
throw Cpu_session::Out_of_metadata();
|
|
}
|
|
_virt_utcb = _phys_utcb;
|
|
|
|
/* common constructor parts */
|
|
_init();
|
|
}
|
|
|
|
|
|
Platform_thread::Platform_thread(const char * name, unsigned int priority,
|
|
addr_t utcb)
|
|
:
|
|
_thread_base(0), _stack_size(0), _pd_id(0), _rm_client(0),
|
|
_virt_utcb((Native_utcb *)utcb), _main_thread(0)
|
|
{
|
|
strncpy(_name, name, NAME_MAX_LEN);
|
|
|
|
/*
|
|
* Allocate UTCB backing store for a thread outside of core. Page alignment
|
|
* is done by RAM session by default. It's save to use core env because
|
|
* this cannot be its server activation thread.
|
|
*/
|
|
Ram_session_component * const ram =
|
|
dynamic_cast<Ram_session_component *>(core_env()->ram_session());
|
|
assert(ram);
|
|
try { _utcb = ram->alloc(sizeof(Native_utcb), 1); }
|
|
catch (...) {
|
|
PERR("failed to allocate UTCB");
|
|
throw Cpu_session::Out_of_metadata();
|
|
}
|
|
_phys_utcb = (Native_utcb *)ram->phys_addr(_utcb);
|
|
|
|
/* common constructor parts */
|
|
_init();
|
|
}
|
|
|
|
|
|
int Platform_thread::join_pd(unsigned const pd_id, bool const main_thread,
|
|
Weak_ptr<Address_space> address_space)
|
|
{
|
|
/* check if we're already in another PD */
|
|
if (_pd_id && _pd_id != pd_id) {
|
|
PERR("already joined a PD");
|
|
return -1;
|
|
}
|
|
/* denote configuration for start method */
|
|
_pd_id = pd_id;
|
|
_main_thread = main_thread;
|
|
_address_space = address_space;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void Platform_thread::_init()
|
|
{
|
|
/* create kernel object */
|
|
_id = Kernel::new_thread(_kernel_thread, this);
|
|
if (!_id) {
|
|
PERR("failed to create kernel object");
|
|
throw Cpu_session::Thread_creation_failed();
|
|
}
|
|
}
|
|
|
|
|
|
int Platform_thread::start(void * ip, void * sp, unsigned int cpu_no)
|
|
{
|
|
/* must be in a PD to get started */
|
|
if (!_pd_id) {
|
|
PERR("invalid PD");
|
|
return -1;
|
|
}
|
|
/* attach UTCB if the thread can't do this by itself */
|
|
if (!_attaches_utcb_by_itself())
|
|
{
|
|
/*
|
|
* Declare page aligned virtual UTCB outside the context area.
|
|
* Kernel afterwards offers this as bootstrap argument to the thread.
|
|
*/
|
|
_virt_utcb = (Native_utcb *)((platform()->vm_start()
|
|
+ platform()->vm_size() - sizeof(Native_utcb))
|
|
& ~((1<<MIN_MAPPING_SIZE_LOG2)-1));
|
|
|
|
/* attach UTCB */
|
|
if (!_rm_client) {
|
|
PERR("invalid RM client");
|
|
return -1;
|
|
};
|
|
Rm_session_component * const rm = _rm_client->member_rm_session();
|
|
try { rm->attach(_utcb, 0, 0, true, _virt_utcb, 0); }
|
|
catch (...) {
|
|
PERR("failed to attach UTCB");
|
|
return -1;
|
|
}
|
|
}
|
|
/* let thread participate in CPU scheduling */
|
|
_tlb = Kernel::start_thread(this, ip, sp, cpu_no);
|
|
if (!_tlb) {
|
|
PERR("failed to start thread");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
void Platform_thread::pager(Pager_object * const pager)
|
|
{
|
|
if (pager) {
|
|
Kernel::set_pager(pager->cap().dst(), _id);
|
|
_rm_client = dynamic_cast<Rm_client *>(pager);
|
|
return;
|
|
}
|
|
Kernel::set_pager(0, _id);
|
|
_rm_client = 0;
|
|
return;
|
|
}
|
|
|
|
|
|
Genode::Pager_object * Platform_thread::pager()
|
|
{
|
|
return _rm_client ? static_cast<Pager_object *>(_rm_client) : 0;
|
|
}
|