98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
/*
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* \brief Protection-domain facility
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2017 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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/* Genode includes */
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#include <base/log.h>
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#include <util/flex_iterator.h>
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/* core includes */
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#include <platform.h>
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#include <platform_pd.h>
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using namespace Genode;
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/***************************
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** Public object members **
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***************************/
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bool Platform_pd::bind_thread(Platform_thread &thread)
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{
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thread.bind_to_pd(this, _thread_cnt == 0);
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_thread_cnt++;
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return true;
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}
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void Platform_pd::unbind_thread(Platform_thread &)
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{
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warning(__func__, "not implemented");
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}
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void Platform_pd::assign_parent(Native_capability parent)
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{
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if (!_parent.valid() && parent.valid())
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_parent = parent;
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}
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Platform_pd::Platform_pd(Allocator &, char const *label, signed, bool)
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: _thread_cnt(0), _pd_sel(cap_map().insert()), _label(label)
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{
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if (_pd_sel == Native_thread::INVALID_INDEX) {
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error("platform pd creation failed ");
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return;
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}
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/* create task */
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enum { KEEP_FREE_PAGES_NOT_AVAILABLE_FOR_UPGRADE = 2, UPPER_LIMIT_PAGES = 32 };
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uint8_t res = Nova::create_pd(_pd_sel, platform_specific().core_pd_sel(),
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Nova::Obj_crd(),
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KEEP_FREE_PAGES_NOT_AVAILABLE_FOR_UPGRADE,
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UPPER_LIMIT_PAGES);
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if (res != Nova::NOVA_OK)
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error("create_pd returned ", res);
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}
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Platform_pd::~Platform_pd()
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{
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if (_pd_sel == Native_thread::INVALID_INDEX)
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return;
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/* Revoke and free cap, pd is gone */
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Nova::revoke(Nova::Obj_crd(_pd_sel, 0));
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cap_map().remove(_pd_sel, 0, false);
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}
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void Platform_pd::flush(addr_t remote_virt, size_t size, Core_local_addr)
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{
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Nova::Rights const revoke_rwx(true, true, true);
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Flexpage_iterator flex(remote_virt, size, remote_virt, size, 0);
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Flexpage page = flex.page();
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if (pd_sel() == Native_thread::INVALID_INDEX)
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return;
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while (page.valid()) {
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Nova::Mem_crd mem(page.addr >> 12, page.log2_order - 12, revoke_rwx);
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Nova::revoke(mem, true, true, pd_sel());
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page = flex.page();
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}
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}
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