224 lines
5.4 KiB
C++
224 lines
5.4 KiB
C++
/*
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* \brief Thread facility
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-02-12
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*/
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/*
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* Copyright (C) 2012-2017 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 Affero General Public License version 3.
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*/
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/* core includes */
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#include <platform_thread.h>
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#include <platform_pd.h>
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#include <core_env.h>
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#include <rm_session_component.h>
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#include "map_local.h"
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/* base-internal includes */
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#include <base/internal/native_utcb.h>
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#include <base/internal/capability_space.h>
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/* kernel includes */
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#include "kernel/pd.h"
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#include "kernel/kernel.h"
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using namespace Genode;
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void Platform_thread::_init() { }
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Weak_ptr<Address_space>& Platform_thread::address_space() {
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return _address_space; }
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Platform_thread::~Platform_thread()
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{
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/* detach UTCB of main threads */
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if (_main_thread) {
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Locked_ptr<Address_space> locked_ptr(_address_space);
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if (locked_ptr.valid())
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locked_ptr->flush((addr_t)_utcb_pd_addr, sizeof(Native_utcb),
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Address_space::Core_local_addr{0});
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}
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/* free UTCB */
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core_env().pd_session()->free(_utcb);
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}
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void Platform_thread::quota(size_t const quota)
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{
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_quota = quota;
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Kernel::thread_quota(_kobj.kernel_object(), quota);
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}
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Platform_thread::Platform_thread(Label const &label, Native_utcb &utcb)
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:
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_label(label),
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_pd(&Kernel::core_pd().platform_pd()),
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_pager(nullptr),
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_utcb_core_addr(&utcb),
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_utcb_pd_addr(&utcb),
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_main_thread(false),
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_kobj(true, _label.string())
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{
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/* create UTCB for a core thread */
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void *utcb_phys;
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if (!platform().ram_alloc().alloc(sizeof(Native_utcb), &utcb_phys)) {
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error("failed to allocate UTCB");
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throw Out_of_ram();
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}
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map_local((addr_t)utcb_phys, (addr_t)_utcb_core_addr,
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sizeof(Native_utcb) / get_page_size());
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}
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Platform_thread::Platform_thread(size_t const quota,
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Label const &label,
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unsigned const virt_prio,
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Affinity::Location const location,
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addr_t const utcb)
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:
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_label(label),
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_pd(nullptr),
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_pager(nullptr),
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_utcb_pd_addr((Native_utcb *)utcb),
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_priority(_scale_priority(virt_prio)),
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_quota(quota),
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_main_thread(false),
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_kobj(true, _priority, _quota, _label.string())
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{
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try {
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_utcb = core_env().pd_session()->alloc(sizeof(Native_utcb), CACHED);
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} catch (...) {
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error("failed to allocate UTCB");
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throw Out_of_ram();
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}
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_utcb_core_addr = (Native_utcb *)core_env().rm_session()->attach(_utcb);
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affinity(location);
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}
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void Platform_thread::join_pd(Platform_pd * pd, bool const main_thread,
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Weak_ptr<Address_space> address_space)
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{
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/* check if thread is already in another protection domain */
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if (_pd && _pd != pd) {
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error("thread already in another protection domain");
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return;
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}
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/* join protection domain */
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_pd = pd;
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_main_thread = main_thread;
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_address_space = address_space;
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}
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void Platform_thread::affinity(Affinity::Location const & location)
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{
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_location = location;
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}
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Affinity::Location Platform_thread::affinity() const { return _location; }
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int Platform_thread::start(void * const ip, void * const sp)
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{
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/* attach UTCB in case of a main thread */
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if (_main_thread) {
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/* lookup dataspace component for physical address */
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auto lambda = [&] (Dataspace_component *dsc) {
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if (!dsc) return -1;
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/* lock the address space */
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Locked_ptr<Address_space> locked_ptr(_address_space);
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if (!locked_ptr.valid()) {
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error("invalid RM client");
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return -1;
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};
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_utcb_pd_addr = (Native_utcb *)user_utcb_main_thread();
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Hw::Address_space * as = static_cast<Hw::Address_space*>(&*locked_ptr);
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if (!as->insert_translation((addr_t)_utcb_pd_addr, dsc->phys_addr(),
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sizeof(Native_utcb), Hw::PAGE_FLAGS_UTCB)) {
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error("failed to attach UTCB");
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return -1;
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}
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return 0;
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};
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if (core_env().entrypoint().apply(_utcb, lambda)) return -1;
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}
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/* initialize thread registers */
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_kobj.kernel_object()->regs->ip = reinterpret_cast<addr_t>(ip);
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_kobj.kernel_object()->regs->sp = reinterpret_cast<addr_t>(sp);
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/* start executing new thread */
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if (!_pd) {
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error("no protection domain associated!");
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return -1;
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}
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unsigned const cpu =
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_location.valid() ? _location.xpos() : 0;
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Native_utcb &utcb = *Thread::myself()->utcb();
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/* reset capability counter */
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utcb.cap_cnt(0);
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utcb.cap_add(Capability_space::capid(_kobj.cap()));
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if (_main_thread) {
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utcb.cap_add(Capability_space::capid(_pd->parent()));
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utcb.cap_add(Capability_space::capid(_utcb));
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}
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Kernel::start_thread(_kobj.kernel_object(), cpu, &_pd->kernel_pd(),
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_utcb_core_addr);
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return 0;
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}
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void Platform_thread::pager(Pager_object &pager)
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{
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using namespace Kernel;
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thread_pager(_kobj.kernel_object(), Capability_space::capid(pager.cap()));
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_pager = &pager;
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}
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Genode::Pager_object &Platform_thread::pager()
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{
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if (_pager)
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return *_pager;
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ASSERT_NEVER_CALLED;
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}
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Thread_state Platform_thread::state()
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{
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Thread_state bstate(*_kobj.kernel_object()->regs);
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return Thread_state(bstate);
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}
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void Platform_thread::state(Thread_state thread_state)
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{
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Cpu_state * cstate = static_cast<Cpu_state *>(&*_kobj.kernel_object()->regs);
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*cstate = static_cast<Cpu_state>(thread_state);
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}
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void Platform_thread::restart()
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{
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Kernel::restart_thread(Capability_space::capid(_kobj.cap()));
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}
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