diff options
Diffstat (limited to 'src/core/hle/kernel/k_page_heap.h')
| -rw-r--r-- | src/core/hle/kernel/k_page_heap.h | 221 |
1 files changed, 121 insertions, 100 deletions
diff --git a/src/core/hle/kernel/k_page_heap.h b/src/core/hle/kernel/k_page_heap.h index a65aa28a0..60fff766b 100644 --- a/src/core/hle/kernel/k_page_heap.h +++ b/src/core/hle/kernel/k_page_heap.h @@ -23,54 +23,73 @@ public: KPageHeap() = default; ~KPageHeap() = default; - constexpr VAddr GetAddress() const { - return heap_address; + constexpr PAddr GetAddress() const { + return m_heap_address; } - constexpr std::size_t GetSize() const { - return heap_size; + constexpr size_t GetSize() const { + return m_heap_size; } - constexpr VAddr GetEndAddress() const { - return GetAddress() + GetSize(); + constexpr PAddr GetEndAddress() const { + return this->GetAddress() + this->GetSize(); } - constexpr std::size_t GetPageOffset(VAddr block) const { - return (block - GetAddress()) / PageSize; + constexpr size_t GetPageOffset(PAddr block) const { + return (block - this->GetAddress()) / PageSize; + } + constexpr size_t GetPageOffsetToEnd(PAddr block) const { + return (this->GetEndAddress() - block) / PageSize; + } + + void Initialize(PAddr heap_address, size_t heap_size, VAddr management_address, + size_t management_size) { + return this->Initialize(heap_address, heap_size, management_address, management_size, + MemoryBlockPageShifts.data(), NumMemoryBlockPageShifts); + } + + size_t GetFreeSize() const { + return this->GetNumFreePages() * PageSize; } - void Initialize(VAddr heap_address, std::size_t heap_size, std::size_t metadata_size); - VAddr AllocateBlock(s32 index, bool random); - void Free(VAddr addr, std::size_t num_pages); + void SetInitialUsedSize(size_t reserved_size) { + // Check that the reserved size is valid. + const size_t free_size = this->GetNumFreePages() * PageSize; + ASSERT(m_heap_size >= free_size + reserved_size); - void UpdateUsedSize() { - used_size = heap_size - (GetNumFreePages() * PageSize); + // Set the initial used size. + m_initial_used_size = m_heap_size - free_size - reserved_size; } - static std::size_t CalculateManagementOverheadSize(std::size_t region_size); + PAddr AllocateBlock(s32 index, bool random); + void Free(PAddr addr, size_t num_pages); + + static size_t CalculateManagementOverheadSize(size_t region_size) { + return CalculateManagementOverheadSize(region_size, MemoryBlockPageShifts.data(), + NumMemoryBlockPageShifts); + } - static constexpr s32 GetAlignedBlockIndex(std::size_t num_pages, std::size_t align_pages) { - const auto target_pages{std::max(num_pages, align_pages)}; - for (std::size_t i = 0; i < NumMemoryBlockPageShifts; i++) { - if (target_pages <= - (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) { + static constexpr s32 GetAlignedBlockIndex(size_t num_pages, size_t align_pages) { + const size_t target_pages = std::max(num_pages, align_pages); + for (size_t i = 0; i < NumMemoryBlockPageShifts; i++) { + if (target_pages <= (size_t(1) << MemoryBlockPageShifts[i]) / PageSize) { return static_cast<s32>(i); } } return -1; } - static constexpr s32 GetBlockIndex(std::size_t num_pages) { - for (s32 i{static_cast<s32>(NumMemoryBlockPageShifts) - 1}; i >= 0; i--) { - if (num_pages >= (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) { + static constexpr s32 GetBlockIndex(size_t num_pages) { + for (s32 i = static_cast<s32>(NumMemoryBlockPageShifts) - 1; i >= 0; i--) { + if (num_pages >= (size_t(1) << MemoryBlockPageShifts[i]) / PageSize) { return i; } } return -1; } - static constexpr std::size_t GetBlockSize(std::size_t index) { - return static_cast<std::size_t>(1) << MemoryBlockPageShifts[index]; + static constexpr size_t GetBlockSize(size_t index) { + return size_t(1) << MemoryBlockPageShifts[index]; } - static constexpr std::size_t GetBlockNumPages(std::size_t index) { + static constexpr size_t GetBlockNumPages(size_t index) { return GetBlockSize(index) / PageSize; } @@ -83,114 +102,116 @@ private: Block() = default; ~Block() = default; - constexpr std::size_t GetShift() const { - return block_shift; + constexpr size_t GetShift() const { + return m_block_shift; } - constexpr std::size_t GetNextShift() const { - return next_block_shift; + constexpr size_t GetNextShift() const { + return m_next_block_shift; } - constexpr std::size_t GetSize() const { - return static_cast<std::size_t>(1) << GetShift(); + constexpr size_t GetSize() const { + return u64(1) << this->GetShift(); } - constexpr std::size_t GetNumPages() const { - return GetSize() / PageSize; + constexpr size_t GetNumPages() const { + return this->GetSize() / PageSize; } - constexpr std::size_t GetNumFreeBlocks() const { - return bitmap.GetNumBits(); + constexpr size_t GetNumFreeBlocks() const { + return m_bitmap.GetNumBits(); } - constexpr std::size_t GetNumFreePages() const { - return GetNumFreeBlocks() * GetNumPages(); + constexpr size_t GetNumFreePages() const { + return this->GetNumFreeBlocks() * this->GetNumPages(); } - u64* Initialize(VAddr addr, std::size_t size, std::size_t bs, std::size_t nbs, - u64* bit_storage) { - // Set shifts - block_shift = bs; - next_block_shift = nbs; - - // Align up the address - VAddr end{addr + size}; - const auto align{(next_block_shift != 0) ? (1ULL << next_block_shift) - : (1ULL << block_shift)}; - addr = Common::AlignDown((addr), align); - end = Common::AlignUp((end), align); - - heap_address = addr; - end_offset = (end - addr) / (1ULL << block_shift); - return bitmap.Initialize(bit_storage, end_offset); + u64* Initialize(PAddr addr, size_t size, size_t bs, size_t nbs, u64* bit_storage) { + // Set shifts. + m_block_shift = bs; + m_next_block_shift = nbs; + + // Align up the address. + PAddr end = addr + size; + const size_t align = (m_next_block_shift != 0) ? (u64(1) << m_next_block_shift) + : (u64(1) << m_block_shift); + addr = Common::AlignDown(addr, align); + end = Common::AlignUp(end, align); + + m_heap_address = addr; + m_end_offset = (end - addr) / (u64(1) << m_block_shift); + return m_bitmap.Initialize(bit_storage, m_end_offset); } - VAddr PushBlock(VAddr address) { - // Set the bit for the free block - std::size_t offset{(address - heap_address) >> GetShift()}; - bitmap.SetBit(offset); + PAddr PushBlock(PAddr address) { + // Set the bit for the free block. + size_t offset = (address - m_heap_address) >> this->GetShift(); + m_bitmap.SetBit(offset); - // If we have a next shift, try to clear the blocks below and return the address - if (GetNextShift()) { - const auto diff{1ULL << (GetNextShift() - GetShift())}; + // If we have a next shift, try to clear the blocks below this one and return the new + // address. + if (this->GetNextShift()) { + const size_t diff = u64(1) << (this->GetNextShift() - this->GetShift()); offset = Common::AlignDown(offset, diff); - if (bitmap.ClearRange(offset, diff)) { - return heap_address + (offset << GetShift()); + if (m_bitmap.ClearRange(offset, diff)) { + return m_heap_address + (offset << this->GetShift()); } } - // We couldn't coalesce, or we're already as big as possible - return 0; + // We couldn't coalesce, or we're already as big as possible. + return {}; } - VAddr PopBlock(bool random) { - // Find a free block - const s64 soffset{bitmap.FindFreeBlock(random)}; + PAddr PopBlock(bool random) { + // Find a free block. + s64 soffset = m_bitmap.FindFreeBlock(random); if (soffset < 0) { - return 0; + return {}; } - const auto offset{static_cast<std::size_t>(soffset)}; + const size_t offset = static_cast<size_t>(soffset); - // Update our tracking and return it - bitmap.ClearBit(offset); - return heap_address + (offset << GetShift()); + // Update our tracking and return it. + m_bitmap.ClearBit(offset); + return m_heap_address + (offset << this->GetShift()); } - static constexpr std::size_t CalculateManagementOverheadSize(std::size_t region_size, - std::size_t cur_block_shift, - std::size_t next_block_shift) { - const auto cur_block_size{(1ULL << cur_block_shift)}; - const auto next_block_size{(1ULL << next_block_shift)}; - const auto align{(next_block_shift != 0) ? next_block_size : cur_block_size}; + public: + static constexpr size_t CalculateManagementOverheadSize(size_t region_size, + size_t cur_block_shift, + size_t next_block_shift) { + const size_t cur_block_size = (u64(1) << cur_block_shift); + const size_t next_block_size = (u64(1) << next_block_shift); + const size_t align = (next_block_shift != 0) ? next_block_size : cur_block_size; return KPageBitmap::CalculateManagementOverheadSize( (align * 2 + Common::AlignUp(region_size, align)) / cur_block_size); } private: - KPageBitmap bitmap; - VAddr heap_address{}; - uintptr_t end_offset{}; - std::size_t block_shift{}; - std::size_t next_block_shift{}; + KPageBitmap m_bitmap; + PAddr m_heap_address{}; + uintptr_t m_end_offset{}; + size_t m_block_shift{}; + size_t m_next_block_shift{}; }; - constexpr std::size_t GetNumFreePages() const { - std::size_t num_free{}; - - for (const auto& block : blocks) { - num_free += block.GetNumFreePages(); - } - - return num_free; - } +private: + void Initialize(PAddr heap_address, size_t heap_size, VAddr management_address, + size_t management_size, const size_t* block_shifts, size_t num_block_shifts); + size_t GetNumFreePages() const; - void FreeBlock(VAddr block, s32 index); + void FreeBlock(PAddr block, s32 index); - static constexpr std::size_t NumMemoryBlockPageShifts{7}; - static constexpr std::array<std::size_t, NumMemoryBlockPageShifts> MemoryBlockPageShifts{ + static constexpr size_t NumMemoryBlockPageShifts{7}; + static constexpr std::array<size_t, NumMemoryBlockPageShifts> MemoryBlockPageShifts{ 0xC, 0x10, 0x15, 0x16, 0x19, 0x1D, 0x1E, }; - VAddr heap_address{}; - std::size_t heap_size{}; - std::size_t used_size{}; - std::array<Block, NumMemoryBlockPageShifts> blocks{}; - std::vector<u64> metadata; +private: + static size_t CalculateManagementOverheadSize(size_t region_size, const size_t* block_shifts, + size_t num_block_shifts); + +private: + PAddr m_heap_address{}; + size_t m_heap_size{}; + size_t m_initial_used_size{}; + size_t m_num_blocks{}; + std::array<Block, NumMemoryBlockPageShifts> m_blocks{}; + std::vector<u64> m_management_data; }; } // namespace Kernel |