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https://github.com/Atmosphere-NX/Atmosphere.git
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90 lines
4.2 KiB
C++
90 lines
4.2 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern {
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Result KSecureSystemResource::Initialize(size_t size, KResourceLimit *resource_limit, KMemoryManager::Pool pool) {
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/* Set members. */
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m_resource_limit = resource_limit;
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m_resource_size = size;
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m_resource_pool = pool;
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/* Determine required size for our secure resource. */
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const size_t secure_size = this->CalculateRequiredSecureMemorySize();
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/* Reserve memory for our secure resource. */
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KScopedResourceReservation memory_reservation(m_resource_limit, ams::svc::LimitableResource_PhysicalMemoryMax, secure_size);
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R_UNLESS(memory_reservation.Succeeded(), svc::ResultLimitReached());
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/* Allocate secure memory. */
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R_TRY(KSystemControl::AllocateSecureMemory(std::addressof(m_resource_address), m_resource_size, m_resource_pool));
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MESOSPHERE_ASSERT(m_resource_address != Null<KVirtualAddress>);
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/* Ensure we clean up the secure memory, if we fail past this point. */
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ON_RESULT_FAILURE { KSystemControl::FreeSecureMemory(m_resource_address, m_resource_size, m_resource_pool); };
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/* Check that our allocation is bigger than the reference counts needed for it. */
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const size_t rc_size = util::AlignUp(KPageTableSlabHeap::CalculateReferenceCountSize(m_resource_size), PageSize);
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R_UNLESS(m_resource_size > rc_size, svc::ResultOutOfMemory());
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/* Initialize slab heaps. */
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m_dynamic_page_manager.Initialize(m_resource_address + rc_size, m_resource_size - rc_size, PageSize);
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m_page_table_heap.Initialize(std::addressof(m_dynamic_page_manager), 0, GetPointer<KPageTableManager::RefCount>(m_resource_address));
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m_memory_block_heap.Initialize(std::addressof(m_dynamic_page_manager), 0);
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m_block_info_heap.Initialize(std::addressof(m_dynamic_page_manager), 0);
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/* Initialize managers. */
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m_page_table_manager.Initialize(std::addressof(m_dynamic_page_manager), std::addressof(m_page_table_heap));
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m_memory_block_slab_manager.Initialize(std::addressof(m_dynamic_page_manager), std::addressof(m_memory_block_heap));
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m_block_info_manager.Initialize(std::addressof(m_dynamic_page_manager), std::addressof(m_block_info_heap));
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/* Set our managers. */
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this->SetManagers(m_memory_block_slab_manager, m_block_info_manager, m_page_table_manager);
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/* Commit the memory reservation. */
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memory_reservation.Commit();
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/* Open reference to our resource limit. */
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m_resource_limit->Open();
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/* Set ourselves as initialized. */
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m_is_initialized = true;
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R_SUCCEED();
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}
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void KSecureSystemResource::Finalize() {
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/* Check that we have no outstanding allocations. */
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MESOSPHERE_ABORT_UNLESS(m_memory_block_slab_manager.GetUsed() == 0);
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MESOSPHERE_ABORT_UNLESS(m_block_info_manager.GetUsed() == 0);
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MESOSPHERE_ABORT_UNLESS(m_page_table_manager.GetUsed() == 0);
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/* Free our secure memory. */
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KSystemControl::FreeSecureMemory(m_resource_address, m_resource_size, m_resource_pool);
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/* Release the memory reservation. */
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m_resource_limit->Release(ams::svc::LimitableResource_PhysicalMemoryMax, this->CalculateRequiredSecureMemorySize());
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/* Close reference to our resource limit. */
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m_resource_limit->Close();
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}
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size_t KSecureSystemResource::CalculateRequiredSecureMemorySize(size_t size, KMemoryManager::Pool pool) {
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return KSystemControl::CalculateRequiredSecureMemorySize(size, pool);
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}
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}
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