mirror of
https://github.com/Atmosphere-NX/Atmosphere
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74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020 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 KMemoryBlockManager::Initialize(KProcessAddress st, KProcessAddress nd, KMemoryBlockSlabManager *slab_manager) {
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/* Allocate a block to encapsulate the address space, insert it into the tree. */
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KMemoryBlock *start_block = slab_manager->Allocate();
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R_UNLESS(start_block != nullptr, svc::ResultOutOfResource());
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/* Set our start and end. */
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this->start = st;
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this->end = nd;
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MESOSPHERE_ASSERT(util::IsAligned(GetInteger(this->start), PageSize));
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MESOSPHERE_ASSERT(util::IsAligned(GetInteger(this->end), PageSize));
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/* Initialize and insert the block. */
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start_block->Initialize(this->start, (this->end - this->start) / PageSize, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None);
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this->memory_block_tree.insert(*start_block);
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return ResultSuccess();
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}
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void KMemoryBlockManager::Finalize(KMemoryBlockSlabManager *slab_manager) {
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/* Erase every block until we have none left. */
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auto it = this->memory_block_tree.begin();
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while (it != this->memory_block_tree.end()) {
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KMemoryBlock *block = std::addressof(*it);
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it = this->memory_block_tree.erase(it);
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slab_manager->Free(block);
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}
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MESOSPHERE_ASSERT(this->memory_block_tree.empty());
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}
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/* Debug. */
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bool KMemoryBlockManager::CheckState() const {
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/* If we fail, we should dump blocks. */
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auto dump_guard = SCOPE_GUARD { this->DumpBlocks(); };
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/* Loop over every block, ensuring that we are sorted and coalesced. */
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auto it = this->memory_block_tree.cbegin();
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auto prev = it++;
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while (it != this->memory_block_tree.cend()) {
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MESOSPHERE_TODO("Validate KMemoryBlock Tree");
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/* Advance the iterator. */
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prev = it++;
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}
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/* We're valid, so no need to print. */
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dump_guard.Cancel();
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return true;
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}
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void KMemoryBlockManager::DumpBlocks() const {
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MESOSPHERE_TODO("Dump useful debugging information");
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}
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}
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