142 lines
3.2 KiB
C++
142 lines
3.2 KiB
C++
/*
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* \brief Fiasco protection domain facility
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* \author Christian Helmuth
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* \author Stefan Kalkowski
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* \date 2006-04-11
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*/
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/*
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* Copyright (C) 2006-2013 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/native_types.h>
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#include <util/misc_math.h>
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/* core includes */
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#include <util.h>
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#include <platform.h>
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#include <platform_pd.h>
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/* Fiasco includes */
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namespace Fiasco {
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#include <l4/sys/utcb.h>
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#include <l4/sys/factory.h>
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}
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using namespace Fiasco;
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using namespace Genode;
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static addr_t core_utcb_base() {
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static addr_t base = (addr_t) l4_utcb();
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return base;
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}
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/***************************
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** Public object members **
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***************************/
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int Platform_pd::bind_thread(Platform_thread *thread)
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{
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/*
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* Fiasco.OC limits the UTCB area for roottask to 16K. Therefore, the
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* number of threads is limited to 16K / L4_UTCB_OFFSET.
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* (see kernel/fiasco/src/kern/kernel_thread-std.cpp:94)
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*/
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unsigned const thread_max = thread->core_thread() ? 16*1024/L4_UTCB_OFFSET : THREAD_MAX;
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for (unsigned i = 0; i < thread_max; i++) {
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if (_threads[i])
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continue;
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_threads[i] = thread;
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if (thread->core_thread())
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thread->_utcb = (addr_t) (core_utcb_base() + i * L4_UTCB_OFFSET);
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else
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thread->_utcb =
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reinterpret_cast<addr_t>(utcb_area_start() + i * L4_UTCB_OFFSET);
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Fiasco::l4_cap_idx_t cap_offset = THREAD_AREA_BASE + i * THREAD_AREA_SLOT;
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thread->_gate.remote = cap_offset + THREAD_GATE_CAP;
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thread->_pager.remote = cap_offset + THREAD_PAGER_CAP;
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thread->_irq.remote = cap_offset + THREAD_IRQ_CAP;
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/* if it's no core-thread we have to map parent and pager gate cap */
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if (!thread->core_thread()) {
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_task.map(_task.local.dst());
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_parent.map(_task.local.dst());
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}
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/* inform thread about binding */
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thread->bind(this);
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return 0;
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}
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PERR("thread alloc failed");
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return -1;
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}
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void Platform_pd::unbind_thread(Platform_thread *thread)
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{
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/* inform thread about unbinding */
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thread->unbind();
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for (unsigned i = 0; i < THREAD_MAX; i++)
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if (_threads[i] == thread) {
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_threads[i] = (Platform_thread*) 0;
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return;
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}
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}
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int Platform_pd::assign_parent(Native_capability parent)
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{
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if (!parent.valid()) return -1;
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_parent.local = parent;
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_parent.remote = PARENT_CAP;
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return 0;
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}
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Platform_pd::Platform_pd(Core_cap_index* i)
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: _task(Native_capability(i), TASK_CAP)
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{
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for (unsigned i = 0; i < THREAD_MAX; i++)
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_threads[i] = (Platform_thread*) 0;
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}
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Platform_pd::Platform_pd(Allocator *, char const *)
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: _task(true, TASK_CAP)
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{
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for (unsigned i = 0; i < THREAD_MAX; i++)
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_threads[i] = (Platform_thread*) 0;
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l4_fpage_t utcb_area = l4_fpage(utcb_area_start(),
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log2<unsigned>(UTCB_AREA_SIZE), 0);
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l4_msgtag_t tag = l4_factory_create_task(L4_BASE_FACTORY_CAP,
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_task.local.dst(), utcb_area);
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if (l4_msgtag_has_error(tag))
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PERR("pd creation failed");
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}
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Platform_pd::~Platform_pd()
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{
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/* invalidate weak pointers to this object */
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Address_space::lock_for_destruction();
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for (unsigned i = 0; i < THREAD_MAX; i++) {
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if (_threads[i])
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_threads[i]->unbind();
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}
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}
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