56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
/*
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* \brief Kernel backend for protection domains
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* \author Stefan Kalkowski
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* \date 2015-03-20
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*/
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/*
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* Copyright (C) 2015 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 <util/bit_allocator.h>
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/* core includes */
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#include <assert.h>
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#include <kernel/pd.h>
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using Asid_allocator = Genode::Bit_allocator<256>;
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static Asid_allocator &alloc() {
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return *unmanaged_singleton<Asid_allocator>(); }
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Kernel::Pd::Pd(Kernel::Pd::Table * const table,
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Genode::Platform_pd * const platform_pd)
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: Kernel::Cpu::Pd((Genode::uint8_t)alloc().alloc()),
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_table(table), _platform_pd(platform_pd)
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{
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capid_t invalid = _capid_alloc.alloc();
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assert(invalid == cap_id_invalid());
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}
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Kernel::Pd::~Pd() {
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while (Object_identity_reference *oir = _cap_tree.first())
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oir->~Object_identity_reference();
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/* clean up buffers of memory management */
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Cpu * const cpu = cpu_pool()->cpu(Cpu::executing_id());
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cpu->clean_invalidate_data_cache();
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cpu->invalidate_instr_cache();
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cpu->invalidate_tlb_by_pid(asid);
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alloc().free(asid);
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}
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void Kernel::Pd::admit(Kernel::Cpu::Context * const c)
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{
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c->protection_domain(asid);
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c->translation_table((addr_t)translation_table());
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}
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