Rewrite kernel memory allocator (#3316)
* Rewrite kernel memory allocator * Remove unused using * Adjust private static field naming * Change UlongBitSize to UInt64BitSize * Fix unused argument, change argument order to be inline with official code and disable random allocation
This commit is contained in:
gdkchan
GitHub
parent
c881cd2d14
commit
f2a41b7a1c
@ -22,7 +22,17 @@ namespace Ryujinx.Common
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public static long AlignUp(long value, int size)
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{
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return (value + (size - 1)) & -(long)size;
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return AlignUp(value, (long)size);
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}
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public static ulong AlignUp(ulong value, ulong size)
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{
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return (ulong)AlignUp((long)value, (long)size);
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}
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public static long AlignUp(long value, long size)
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{
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return (value + (size - 1)) & -size;
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}
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public static uint AlignDown(uint value, int size)
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@ -42,7 +52,17 @@ namespace Ryujinx.Common
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public static long AlignDown(long value, int size)
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{
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return value & -(long)size;
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return AlignDown(value, (long)size);
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}
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public static ulong AlignDown(ulong value, ulong size)
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{
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return (ulong)AlignDown((long)value, (long)size);
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}
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public static long AlignDown(long value, long size)
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{
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return value & -size;
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}
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public static int DivRoundUp(int value, int dividend)
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@ -1,87 +0,0 @@
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namespace Ryujinx.HLE.HOS.Kernel.Memory
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{
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class KMemoryRegionBlock
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{
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public long[][] Masks;
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public ulong FreeCount;
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public int MaxLevel;
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public ulong StartAligned;
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public ulong SizeInBlocksTruncated;
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public ulong SizeInBlocksRounded;
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public int Order;
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public int NextOrder;
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public bool TryCoalesce(int index, int count)
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{
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long mask = ((1L << count) - 1) << (index & 63);
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index /= 64;
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if (count >= 64)
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{
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int remaining = count;
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int tempIdx = index;
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do
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{
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if (Masks[MaxLevel - 1][tempIdx++] != -1L)
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{
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return false;
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}
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remaining -= 64;
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}
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while (remaining != 0);
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remaining = count;
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tempIdx = index;
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do
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{
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Masks[MaxLevel - 1][tempIdx] = 0;
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ClearMaskBit(MaxLevel - 2, tempIdx++);
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remaining -= 64;
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}
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while (remaining != 0);
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}
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else
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{
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long value = Masks[MaxLevel - 1][index];
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if ((mask & ~value) != 0)
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{
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return false;
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}
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value &= ~mask;
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Masks[MaxLevel - 1][index] = value;
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if (value == 0)
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{
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ClearMaskBit(MaxLevel - 2, index);
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}
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}
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FreeCount -= (ulong)count;
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return true;
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}
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public void ClearMaskBit(int startLevel, int index)
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{
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for (int level = startLevel; level >= 0; level--, index /= 64)
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{
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Masks[level][index / 64] &= ~(1L << (index & 63));
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if (Masks[level][index / 64] != 0)
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{
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break;
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}
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}
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}
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}
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}
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@ -1,102 +1,42 @@
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using Ryujinx.Common;
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using Ryujinx.HLE.HOS.Kernel.Common;
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using System.Diagnostics;
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using System.Numerics;
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namespace Ryujinx.HLE.HOS.Kernel.Memory
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{
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class KMemoryRegionManager
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{
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private static readonly int[] BlockOrders = new int[] { 12, 16, 21, 22, 25, 29, 30 };
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private readonly KPageHeap _pageHeap;
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public ulong Address { get; private set; }
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public ulong EndAddr { get; private set; }
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public ulong Size { get; private set; }
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private int _blockOrdersCount;
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private readonly KMemoryRegionBlock[] _blocks;
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public ulong Address { get; }
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public ulong Size { get; }
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public ulong EndAddr => Address + Size;
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private readonly ushort[] _pageReferenceCounts;
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public KMemoryRegionManager(ulong address, ulong size, ulong endAddr)
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{
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_blocks = new KMemoryRegionBlock[BlockOrders.Length];
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Address = address;
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Size = size;
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EndAddr = endAddr;
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_blockOrdersCount = BlockOrders.Length;
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for (int blockIndex = 0; blockIndex < _blockOrdersCount; blockIndex++)
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{
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_blocks[blockIndex] = new KMemoryRegionBlock();
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_blocks[blockIndex].Order = BlockOrders[blockIndex];
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int nextOrder = blockIndex == _blockOrdersCount - 1 ? 0 : BlockOrders[blockIndex + 1];
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_blocks[blockIndex].NextOrder = nextOrder;
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int currBlockSize = 1 << BlockOrders[blockIndex];
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int nextBlockSize = currBlockSize;
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if (nextOrder != 0)
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{
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nextBlockSize = 1 << nextOrder;
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}
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ulong startAligned = BitUtils.AlignDown(address, nextBlockSize);
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ulong endAddrAligned = BitUtils.AlignDown(endAddr, currBlockSize);
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ulong sizeInBlocksTruncated = (endAddrAligned - startAligned) >> BlockOrders[blockIndex];
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ulong endAddrRounded = BitUtils.AlignUp(address + size, nextBlockSize);
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ulong sizeInBlocksRounded = (endAddrRounded - startAligned) >> BlockOrders[blockIndex];
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_blocks[blockIndex].StartAligned = startAligned;
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_blocks[blockIndex].SizeInBlocksTruncated = sizeInBlocksTruncated;
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_blocks[blockIndex].SizeInBlocksRounded = sizeInBlocksRounded;
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ulong currSizeInBlocks = sizeInBlocksRounded;
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int maxLevel = 0;
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do
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{
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maxLevel++;
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}
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while ((currSizeInBlocks /= 64) != 0);
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_blocks[blockIndex].MaxLevel = maxLevel;
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_blocks[blockIndex].Masks = new long[maxLevel][];
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currSizeInBlocks = sizeInBlocksRounded;
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for (int level = maxLevel - 1; level >= 0; level--)
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{
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currSizeInBlocks = (currSizeInBlocks + 63) / 64;
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_blocks[blockIndex].Masks[level] = new long[currSizeInBlocks];
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}
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}
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Size = size;
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_pageReferenceCounts = new ushort[size / KPageTableBase.PageSize];
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if (size != 0)
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{
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FreePages(address, size / KPageTableBase.PageSize);
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}
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_pageHeap = new KPageHeap(address, size);
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_pageHeap.Free(address, size / KPageTableBase.PageSize);
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_pageHeap.UpdateUsedSize();
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}
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public KernelResult AllocatePages(ulong pagesCount, bool backwards, out KPageList pageList)
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public KernelResult AllocatePages(out KPageList pageList, ulong pagesCount)
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{
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lock (_blocks)
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if (pagesCount == 0)
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{
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KernelResult result = AllocatePagesImpl(pagesCount, backwards, out pageList);
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pageList = new KPageList();
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return KernelResult.Success;
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}
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lock (_pageHeap)
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{
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KernelResult result = AllocatePagesImpl(out pageList, pagesCount, false);
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if (result == KernelResult.Success)
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{
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@ -112,9 +52,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
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public ulong AllocatePagesContiguous(KernelContext context, ulong pagesCount, bool backwards)
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{
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lock (_blocks)
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if (pagesCount == 0)
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{
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ulong address = AllocatePagesContiguousImpl(pagesCount, backwards);
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return 0;
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}
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lock (_pageHeap)
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{
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ulong address = AllocatePagesContiguousImpl(pagesCount, 1, backwards);
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if (address != 0)
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{
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@ -126,373 +71,110 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
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}
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}
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private KernelResult AllocatePagesImpl(ulong pagesCount, bool backwards, out KPageList pageList)
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private KernelResult AllocatePagesImpl(out KPageList pageList, ulong pagesCount, bool random)
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{
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pageList = new KPageList();
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if (_blockOrdersCount > 0)
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{
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if (GetFreePagesImpl() < pagesCount)
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{
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return KernelResult.OutOfMemory;
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}
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}
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else if (pagesCount != 0)
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int heapIndex = KPageHeap.GetBlockIndex(pagesCount);
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if (heapIndex < 0)
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{
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return KernelResult.OutOfMemory;
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}
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for (int blockIndex = _blockOrdersCount - 1; blockIndex >= 0; blockIndex--)
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for (int index = heapIndex; index >= 0; index--)
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{
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KMemoryRegionBlock block = _blocks[blockIndex];
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ulong pagesPerAlloc = KPageHeap.GetBlockPagesCount(index);
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ulong bestFitBlockSize = 1UL << block.Order;
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ulong blockPagesCount = bestFitBlockSize / KPageTableBase.PageSize;
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// Check if this is the best fit for this page size.
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// If so, try allocating as much requested pages as possible.
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while (blockPagesCount <= pagesCount)
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while (pagesCount >= pagesPerAlloc)
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{
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ulong address = AllocatePagesForOrder(blockIndex, backwards, bestFitBlockSize);
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ulong allocatedBlock = _pageHeap.AllocateBlock(index, random);
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// The address being zero means that no free space was found on that order,
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// just give up and try with the next one.
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if (address == 0)
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if (allocatedBlock == 0)
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{
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break;
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}
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// Add new allocated page(s) to the pages list.
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// If an error occurs, then free all allocated pages and fail.
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KernelResult result = pageList.AddRange(address, blockPagesCount);
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KernelResult result = pageList.AddRange(allocatedBlock, pagesPerAlloc);
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if (result != KernelResult.Success)
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{
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FreePages(address, blockPagesCount);
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foreach (KPageNode pageNode in pageList)
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{
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FreePages(pageNode.Address, pageNode.PagesCount);
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}
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FreePages(pageList);
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_pageHeap.Free(allocatedBlock, pagesPerAlloc);
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return result;
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}
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pagesCount -= blockPagesCount;
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pagesCount -= pagesPerAlloc;
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}
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}
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// Success case, all requested pages were allocated successfully.
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if (pagesCount == 0)
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if (pagesCount != 0)
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{
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return KernelResult.Success;
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FreePages(pageList);
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return KernelResult.OutOfMemory;
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}
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// Error case, free allocated pages and return out of memory.
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foreach (KPageNode pageNode in pageList)
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{
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FreePages(pageNode.Address, pageNode.PagesCount);
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}
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pageList = null;
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return KernelResult.OutOfMemory;
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return KernelResult.Success;
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}
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private ulong AllocatePagesContiguousImpl(ulong pagesCount, bool backwards)
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private ulong AllocatePagesContiguousImpl(ulong pagesCount, ulong alignPages, bool random)
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{
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if (pagesCount == 0 || _blocks.Length < 1)
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int heapIndex = KPageHeap.GetAlignedBlockIndex(pagesCount, alignPages);
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ulong allocatedBlock = _pageHeap.AllocateBlock(heapIndex, random);
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if (allocatedBlock == 0)
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{
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return 0;
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}
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int blockIndex = 0;
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ulong allocatedPages = KPageHeap.GetBlockPagesCount(heapIndex);
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while ((1UL << _blocks[blockIndex].Order) / KPageTableBase.PageSize < pagesCount)
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if (allocatedPages > pagesCount)
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{
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if (++blockIndex >= _blocks.Length)
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{
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return 0;
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}
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_pageHeap.Free(allocatedBlock + pagesCount * KPageTableBase.PageSize, allocatedPages - pagesCount);
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}
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ulong tightestFitBlockSize = 1UL << _blocks[blockIndex].Order;
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ulong address = AllocatePagesForOrder(blockIndex, backwards, tightestFitBlockSize);
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ulong requiredSize = pagesCount * KPageTableBase.PageSize;
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if (address != 0 && tightestFitBlockSize > requiredSize)
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{
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FreePages(address + requiredSize, (tightestFitBlockSize - requiredSize) / KPageTableBase.PageSize);
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}
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return address;
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return allocatedBlock;
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}
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private ulong AllocatePagesForOrder(int blockIndex, bool backwards, ulong bestFitBlockSize)
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public void FreePage(ulong address)
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{
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ulong address = 0;
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KMemoryRegionBlock block = null;
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for (int currBlockIndex = blockIndex;
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currBlockIndex < _blockOrdersCount && address == 0;
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currBlockIndex++)
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lock (_pageHeap)
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{
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block = _blocks[currBlockIndex];
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int index = 0;
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bool zeroMask = false;
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for (int level = 0; level < block.MaxLevel; level++)
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{
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long mask = block.Masks[level][index];
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if (mask == 0)
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{
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zeroMask = true;
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break;
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}
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if (backwards)
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{
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index = (index * 64 + 63) - BitOperations.LeadingZeroCount((ulong)mask);
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}
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else
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{
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index = index * 64 + BitOperations.LeadingZeroCount((ulong)BitUtils.ReverseBits64(mask));
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}
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}
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if (block.SizeInBlocksTruncated <= (ulong)index || zeroMask)
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{
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continue;
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}
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block.FreeCount--;
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int tempIdx = index;
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for (int level = block.MaxLevel - 1; level >= 0; level--, tempIdx /= 64)
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{
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block.Masks[level][tempIdx / 64] &= ~(1L << (tempIdx & 63));
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if (block.Masks[level][tempIdx / 64] != 0)
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{
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break;
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}
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}
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address = block.StartAligned + ((ulong)index << block.Order);
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_pageHeap.Free(address, 1);
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}
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for (int currBlockIndex = blockIndex;
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currBlockIndex < _blockOrdersCount && address == 0;
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currBlockIndex++)
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{
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block = _blocks[currBlockIndex];
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int index = 0;
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bool zeroMask = false;
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for (int level = 0; level < block.MaxLevel; level++)
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{
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long mask = block.Masks[level][index];
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if (mask == 0)
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{
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zeroMask = true;
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break;
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}
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if (backwards)
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{
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index = index * 64 + BitOperations.LeadingZeroCount((ulong)BitUtils.ReverseBits64(mask));
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}
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else
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{
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index = (index * 64 + 63) - BitOperations.LeadingZeroCount((ulong)mask);
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}
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}
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if (block.SizeInBlocksTruncated <= (ulong)index || zeroMask)
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{
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continue;
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}
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block.FreeCount--;
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int tempIdx = index;
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for (int level = block.MaxLevel - 1; level >= 0; level--, tempIdx /= 64)
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{
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block.Masks[level][tempIdx / 64] &= ~(1L << (tempIdx & 63));
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if (block.Masks[level][tempIdx / 64] != 0)
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{
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break;
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}
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}
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address = block.StartAligned + ((ulong)index << block.Order);
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}
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if (address != 0)
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{
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// If we are using a larger order than best fit, then we should
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// split it into smaller blocks.
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ulong firstFreeBlockSize = 1UL << block.Order;
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if (firstFreeBlockSize > bestFitBlockSize)
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{
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FreePages(address + bestFitBlockSize, (firstFreeBlockSize - bestFitBlockSize) / KPageTableBase.PageSize);
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}
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}
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return address;
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}
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private void FreePages(ulong address, ulong pagesCount)
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public void FreePages(KPageList pageList)
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{
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lock (_blocks)
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lock (_pageHeap)
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{
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ulong endAddr = address + pagesCount * KPageTableBase.PageSize;
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int blockIndex = _blockOrdersCount - 1;
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ulong addressRounded = 0;
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ulong endAddrTruncated = 0;
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|
||||
for (; blockIndex >= 0; blockIndex--)
|
||||
foreach (KPageNode pageNode in pageList)
|
||||
{
|
||||
KMemoryRegionBlock allocInfo = _blocks[blockIndex];
|
||||
|
||||
int blockSize = 1 << allocInfo.Order;
|
||||
|
||||
addressRounded = BitUtils.AlignUp (address, blockSize);
|
||||
endAddrTruncated = BitUtils.AlignDown(endAddr, blockSize);
|
||||
|
||||
if (addressRounded < endAddrTruncated)
|
||||
{
|
||||
break;
|
||||
}
|
||||
_pageHeap.Free(pageNode.Address, pageNode.PagesCount);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void FreeRegion(ulong currAddress)
|
||||
{
|
||||
for (int currBlockIndex = blockIndex;
|
||||
currBlockIndex < _blockOrdersCount && currAddress != 0;
|
||||
currBlockIndex++)
|
||||
{
|
||||
KMemoryRegionBlock block = _blocks[currBlockIndex];
|
||||
|
||||
block.FreeCount++;
|
||||
|
||||
ulong freedBlocks = (currAddress - block.StartAligned) >> block.Order;
|
||||
|
||||
int index = (int)freedBlocks;
|
||||
|
||||
for (int level = block.MaxLevel - 1; level >= 0; level--, index /= 64)
|
||||
{
|
||||
long mask = block.Masks[level][index / 64];
|
||||
|
||||
block.Masks[level][index / 64] = mask | (1L << (index & 63));
|
||||
|
||||
if (mask != 0)
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
int blockSizeDelta = 1 << (block.NextOrder - block.Order);
|
||||
|
||||
int freedBlocksTruncated = BitUtils.AlignDown((int)freedBlocks, blockSizeDelta);
|
||||
|
||||
if (!block.TryCoalesce(freedBlocksTruncated, blockSizeDelta))
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
currAddress = block.StartAligned + ((ulong)freedBlocksTruncated << block.Order);
|
||||
}
|
||||
}
|
||||
|
||||
// Free inside aligned region.
|
||||
ulong baseAddress = addressRounded;
|
||||
|
||||
while (baseAddress < endAddrTruncated)
|
||||
{
|
||||
ulong blockSize = 1UL << _blocks[blockIndex].Order;
|
||||
|
||||
FreeRegion(baseAddress);
|
||||
|
||||
baseAddress += blockSize;
|
||||
}
|
||||
|
||||
int nextBlockIndex = blockIndex - 1;
|
||||
|
||||
// Free region between Address and aligned region start.
|
||||
baseAddress = addressRounded;
|
||||
|
||||
for (blockIndex = nextBlockIndex; blockIndex >= 0; blockIndex--)
|
||||
{
|
||||
ulong blockSize = 1UL << _blocks[blockIndex].Order;
|
||||
|
||||
while (baseAddress - blockSize >= address)
|
||||
{
|
||||
baseAddress -= blockSize;
|
||||
|
||||
FreeRegion(baseAddress);
|
||||
}
|
||||
}
|
||||
|
||||
// Free region between aligned region end and End Address.
|
||||
baseAddress = endAddrTruncated;
|
||||
|
||||
for (blockIndex = nextBlockIndex; blockIndex >= 0; blockIndex--)
|
||||
{
|
||||
ulong blockSize = 1UL << _blocks[blockIndex].Order;
|
||||
|
||||
while (baseAddress + blockSize <= endAddr)
|
||||
{
|
||||
FreeRegion(baseAddress);
|
||||
|
||||
baseAddress += blockSize;
|
||||
}
|
||||
}
|
||||
public void FreePages(ulong address, ulong pagesCount)
|
||||
{
|
||||
lock (_pageHeap)
|
||||
{
|
||||
_pageHeap.Free(address, pagesCount);
|
||||
}
|
||||
}
|
||||
|
||||
public ulong GetFreePages()
|
||||
{
|
||||
lock (_blocks)
|
||||
lock (_pageHeap)
|
||||
{
|
||||
return GetFreePagesImpl();
|
||||
return _pageHeap.GetFreePagesCount();
|
||||
}
|
||||
}
|
||||
|
||||
private ulong GetFreePagesImpl()
|
||||
{
|
||||
ulong availablePages = 0;
|
||||
|
||||
for (int blockIndex = 0; blockIndex < _blockOrdersCount; blockIndex++)
|
||||
{
|
||||
KMemoryRegionBlock block = _blocks[blockIndex];
|
||||
|
||||
ulong blockPagesCount = (1UL << block.Order) / KPageTableBase.PageSize;
|
||||
|
||||
availablePages += blockPagesCount * block.FreeCount;
|
||||
}
|
||||
|
||||
return availablePages;
|
||||
}
|
||||
|
||||
public void IncrementPagesReferenceCount(ulong address, ulong pagesCount)
|
||||
{
|
||||
ulong index = GetPageOffset(address);
|
||||
|
||||
298
Ryujinx.HLE/HOS/Kernel/Memory/KPageBitmap.cs
Normal file
298
Ryujinx.HLE/HOS/Kernel/Memory/KPageBitmap.cs
Normal file
@ -0,0 +1,298 @@
|
||||
using Ryujinx.Common;
|
||||
using System;
|
||||
using System.Numerics;
|
||||
|
||||
namespace Ryujinx.HLE.HOS.Kernel.Memory
|
||||
{
|
||||
class KPageBitmap
|
||||
{
|
||||
private struct RandomNumberGenerator
|
||||
{
|
||||
private uint _entropy;
|
||||
private uint _bitsAvailable;
|
||||
|
||||
private void RefreshEntropy()
|
||||
{
|
||||
_entropy = 0;
|
||||
_bitsAvailable = sizeof(uint) * 8;
|
||||
}
|
||||
|
||||
private bool GenerateRandomBit()
|
||||
{
|
||||
if (_bitsAvailable == 0)
|
||||
{
|
||||
RefreshEntropy();
|
||||
}
|
||||
|
||||
bool bit = (_entropy & 1) != 0;
|
||||
|
||||
_entropy >>= 1;
|
||||
_bitsAvailable--;
|
||||
|
||||
return bit;
|
||||
}
|
||||
|
||||
public int SelectRandomBit(ulong bitmap)
|
||||
{
|
||||
int selected = 0;
|
||||
|
||||
int bitsCount = UInt64BitSize / 2;
|
||||
ulong mask = (1UL << bitsCount) - 1;
|
||||
|
||||
while (bitsCount != 0)
|
||||
{
|
||||
ulong low = bitmap & mask;
|
||||
ulong high = (bitmap >> bitsCount) & mask;
|
||||
|
||||
bool chooseLow;
|
||||
|
||||
if (high == 0)
|
||||
{
|
||||
chooseLow = true;
|
||||
}
|
||||
else if (low == 0)
|
||||
{
|
||||
chooseLow = false;
|
||||
}
|
||||
else
|
||||
{
|
||||
chooseLow = GenerateRandomBit();
|
||||
}
|
||||
|
||||
if (chooseLow)
|
||||
{
|
||||
bitmap = low;
|
||||
}
|
||||
else
|
||||
{
|
||||
bitmap = high;
|
||||
selected += bitsCount;
|
||||
}
|
||||
|
||||
bitsCount /= 2;
|
||||
mask >>= bitsCount;
|
||||
}
|
||||
|
||||
return selected;
|
||||
}
|
||||
}
|
||||
|
||||
private const int UInt64BitSize = sizeof(ulong) * 8;
|
||||
private const int MaxDepth = 4;
|
||||
|
||||
private readonly RandomNumberGenerator _rng;
|
||||
private readonly ArraySegment<ulong>[] _bitStorages;
|
||||
private int _usedDepths;
|
||||
|
||||
public int BitsCount { get; private set; }
|
||||
|
||||
public int HighestDepthIndex => _usedDepths - 1;
|
||||
|
||||
public KPageBitmap()
|
||||
{
|
||||
_rng = new RandomNumberGenerator();
|
||||
_bitStorages = new ArraySegment<ulong>[MaxDepth];
|
||||
}
|
||||
|
||||
public ArraySegment<ulong> Initialize(ArraySegment<ulong> storage, ulong size)
|
||||
{
|
||||
_usedDepths = GetRequiredDepth(size);
|
||||
|
||||
for (int depth = HighestDepthIndex; depth >= 0; depth--)
|
||||
{
|
||||
_bitStorages[depth] = storage;
|
||||
size = BitUtils.DivRoundUp(size, UInt64BitSize);
|
||||
storage = storage.Slice((int)size);
|
||||
}
|
||||
|
||||
return storage;
|
||||
}
|
||||
|
||||
public ulong FindFreeBlock(bool random)
|
||||
{
|
||||
ulong offset = 0;
|
||||
int depth = 0;
|
||||
|
||||
if (random)
|
||||
{
|
||||
do
|
||||
{
|
||||
ulong v = _bitStorages[depth][(int)offset];
|
||||
|
||||
if (v == 0)
|
||||
{
|
||||
return ulong.MaxValue;
|
||||
}
|
||||
|
||||
offset = offset * UInt64BitSize + (ulong)_rng.SelectRandomBit(v);
|
||||
}
|
||||
while (++depth < _usedDepths);
|
||||
}
|
||||
else
|
||||
{
|
||||
do
|
||||
{
|
||||
ulong v = _bitStorages[depth][(int)offset];
|
||||
|
||||
if (v == 0)
|
||||
{
|
||||
return ulong.MaxValue;
|
||||
}
|
||||
|
||||
offset = offset * UInt64BitSize + (ulong)BitOperations.TrailingZeroCount(v);
|
||||
}
|
||||
while (++depth < _usedDepths);
|
||||
}
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
public void SetBit(ulong offset)
|
||||
{
|
||||
SetBit(HighestDepthIndex, offset);
|
||||
BitsCount++;
|
||||
}
|
||||
|
||||
public void ClearBit(ulong offset)
|
||||
{
|
||||
ClearBit(HighestDepthIndex, offset);
|
||||
BitsCount--;
|
||||
}
|
||||
|
||||
public bool ClearRange(ulong offset, int count)
|
||||
{
|
||||
int depth = HighestDepthIndex;
|
||||
var bits = _bitStorages[depth];
|
||||
|
||||
int bitInd = (int)(offset / UInt64BitSize);
|
||||
|
||||
if (count < UInt64BitSize)
|
||||
{
|
||||
int shift = (int)(offset % UInt64BitSize);
|
||||
|
||||
ulong mask = ((1UL << count) - 1) << shift;
|
||||
|
||||
ulong v = bits[bitInd];
|
||||
|
||||
if ((v & mask) != mask)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
v &= ~mask;
|
||||
bits[bitInd] = v;
|
||||
|
||||
if (v == 0)
|
||||
{
|
||||
ClearBit(depth - 1, (ulong)bitInd);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int remaining = count;
|
||||
int i = 0;
|
||||
|
||||
do
|
||||
{
|
||||
if (bits[bitInd + i++] != ulong.MaxValue)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
remaining -= UInt64BitSize;
|
||||
}
|
||||
while (remaining > 0);
|
||||
|
||||
remaining = count;
|
||||
i = 0;
|
||||
|
||||
do
|
||||
{
|
||||
bits[bitInd + i] = 0;
|
||||
ClearBit(depth - 1, (ulong)(bitInd + i));
|
||||
i++;
|
||||
remaining -= UInt64BitSize;
|
||||
}
|
||||
while (remaining > 0);
|
||||
}
|
||||
|
||||
BitsCount -= count;
|
||||
return true;
|
||||
}
|
||||
|
||||
private void SetBit(int depth, ulong offset)
|
||||
{
|
||||
while (depth >= 0)
|
||||
{
|
||||
int ind = (int)(offset / UInt64BitSize);
|
||||
int which = (int)(offset % UInt64BitSize);
|
||||
|
||||
ulong mask = 1UL << which;
|
||||
|
||||
ulong v = _bitStorages[depth][ind];
|
||||
|
||||
_bitStorages[depth][ind] = v | mask;
|
||||
|
||||
if (v != 0)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
offset = (ulong)ind;
|
||||
depth--;
|
||||
}
|
||||
}
|
||||
|
||||
private void ClearBit(int depth, ulong offset)
|
||||
{
|
||||
while (depth >= 0)
|
||||
{
|
||||
int ind = (int)(offset / UInt64BitSize);
|
||||
int which = (int)(offset % UInt64BitSize);
|
||||
|
||||
ulong mask = 1UL << which;
|
||||
|
||||
ulong v = _bitStorages[depth][ind];
|
||||
|
||||
v &= ~mask;
|
||||
|
||||
_bitStorages[depth][ind] = v;
|
||||
|
||||
if (v != 0)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
offset = (ulong)ind;
|
||||
depth--;
|
||||
}
|
||||
}
|
||||
|
||||
private static int GetRequiredDepth(ulong regionSize)
|
||||
{
|
||||
int depth = 0;
|
||||
|
||||
do
|
||||
{
|
||||
regionSize /= UInt64BitSize;
|
||||
depth++;
|
||||
}
|
||||
while (regionSize != 0);
|
||||
|
||||
return depth;
|
||||
}
|
||||
|
||||
public static int CalculateManagementOverheadSize(ulong regionSize)
|
||||
{
|
||||
int overheadBits = 0;
|
||||
|
||||
for (int depth = GetRequiredDepth(regionSize) - 1; depth >= 0; depth--)
|
||||
{
|
||||
regionSize = BitUtils.DivRoundUp(regionSize, UInt64BitSize);
|
||||
overheadBits += (int)regionSize;
|
||||
}
|
||||
|
||||
return overheadBits * sizeof(ulong);
|
||||
}
|
||||
}
|
||||
}
|
||||
283
Ryujinx.HLE/HOS/Kernel/Memory/KPageHeap.cs
Normal file
283
Ryujinx.HLE/HOS/Kernel/Memory/KPageHeap.cs
Normal file
@ -0,0 +1,283 @@
|
||||
using Ryujinx.Common;
|
||||
using System;
|
||||
|
||||
namespace Ryujinx.HLE.HOS.Kernel.Memory
|
||||
{
|
||||
class KPageHeap
|
||||
{
|
||||
private class Block
|
||||
{
|
||||
private KPageBitmap _bitmap = new KPageBitmap();
|
||||
private ulong _heapAddress;
|
||||
private ulong _endOffset;
|
||||
|
||||
public int Shift { get; private set; }
|
||||
public int NextShift { get; private set; }
|
||||
public ulong Size => 1UL << Shift;
|
||||
public int PagesCount => (int)(Size / KPageTableBase.PageSize);
|
||||
public int FreeBlocksCount => _bitmap.BitsCount;
|
||||
public int FreePagesCount => FreeBlocksCount * PagesCount;
|
||||
|
||||
public ArraySegment<ulong> Initialize(ulong address, ulong size, int blockShift, int nextBlockShift, ArraySegment<ulong> bitStorage)
|
||||
{
|
||||
Shift = blockShift;
|
||||
NextShift = nextBlockShift;
|
||||
|
||||
ulong endAddress = address + size;
|
||||
|
||||
ulong align = nextBlockShift != 0
|
||||
? 1UL << nextBlockShift
|
||||
: 1UL << blockShift;
|
||||
|
||||
address = BitUtils.AlignDown(address, align);
|
||||
endAddress = BitUtils.AlignUp (endAddress, align);
|
||||
|
||||
_heapAddress = address;
|
||||
_endOffset = (endAddress - address) / (1UL << blockShift);
|
||||
|
||||
return _bitmap.Initialize(bitStorage, _endOffset);
|
||||
}
|
||||
|
||||
public ulong PushBlock(ulong address)
|
||||
{
|
||||
ulong offset = (address - _heapAddress) >> Shift;
|
||||
|
||||
_bitmap.SetBit(offset);
|
||||
|
||||
if (NextShift != 0)
|
||||
{
|
||||
int diff = 1 << (NextShift - Shift);
|
||||
|
||||
offset = BitUtils.AlignDown(offset, diff);
|
||||
|
||||
if (_bitmap.ClearRange(offset, diff))
|
||||
{
|
||||
return _heapAddress + (offset << Shift);
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
public ulong PopBlock(bool random)
|
||||
{
|
||||
long sOffset = (long)_bitmap.FindFreeBlock(random);
|
||||
|
||||
if (sOffset < 0L)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
ulong offset = (ulong)sOffset;
|
||||
|
||||
_bitmap.ClearBit(offset);
|
||||
|
||||
return _heapAddress + (offset << Shift);
|
||||
}
|
||||
|
||||
public static int CalculateManagementOverheadSize(ulong regionSize, int currBlockShift, int nextBlockShift)
|
||||
{
|
||||
ulong currBlockSize = 1UL << currBlockShift;
|
||||
ulong nextBlockSize = 1UL << nextBlockShift;
|
||||
ulong align = nextBlockShift != 0 ? nextBlockSize : currBlockSize;
|
||||
return KPageBitmap.CalculateManagementOverheadSize((align * 2 + BitUtils.AlignUp(regionSize, align)) / currBlockSize);
|
||||
}
|
||||
}
|
||||
|
||||
private static readonly int[] _memoryBlockPageShifts = new int[] { 12, 16, 21, 22, 25, 29, 30 };
|
||||
|
||||
private readonly ulong _heapAddress;
|
||||
private readonly ulong _heapSize;
|
||||
private ulong _usedSize;
|
||||
private readonly int _blocksCount;
|
||||
private readonly Block[] _blocks;
|
||||
|
||||
public KPageHeap(ulong address, ulong size) : this(address, size, _memoryBlockPageShifts)
|
||||
{
|
||||
}
|
||||
|
||||
public KPageHeap(ulong address, ulong size, int[] blockShifts)
|
||||
{
|
||||
_heapAddress = address;
|
||||
_heapSize = size;
|
||||
_blocksCount = blockShifts.Length;
|
||||
_blocks = new Block[_memoryBlockPageShifts.Length];
|
||||
|
||||
var currBitmapStorage = new ArraySegment<ulong>(new ulong[CalculateManagementOverheadSize(size, blockShifts)]);
|
||||
|
||||
for (int i = 0; i < blockShifts.Length; i++)
|
||||
{
|
||||
int currBlockShift = blockShifts[i];
|
||||
int nextBlockShift = i != blockShifts.Length - 1 ? blockShifts[i + 1] : 0;
|
||||
|
||||
_blocks[i] = new Block();
|
||||
|
||||
currBitmapStorage = _blocks[i].Initialize(address, size, currBlockShift, nextBlockShift, currBitmapStorage);
|
||||
}
|
||||
}
|
||||
|
||||
public void UpdateUsedSize()
|
||||
{
|
||||
_usedSize = _heapSize - (GetFreePagesCount() * KPageTableBase.PageSize);
|
||||
}
|
||||
|
||||
public ulong GetFreePagesCount()
|
||||
{
|
||||
ulong freeCount = 0;
|
||||
|
||||
for (int i = 0; i < _blocksCount; i++)
|
||||
{
|
||||
freeCount += (ulong)_blocks[i].FreePagesCount;
|
||||
}
|
||||
|
||||
return freeCount;
|
||||
}
|
||||
|
||||
public ulong AllocateBlock(int index, bool random)
|
||||
{
|
||||
ulong neededSize = _blocks[index].Size;
|
||||
|
||||
for (int i = index; i < _blocksCount; i++)
|
||||
{
|
||||
ulong address = _blocks[i].PopBlock(random);
|
||||
|
||||
if (address != 0)
|
||||
{
|
||||
ulong allocatedSize = _blocks[i].Size;
|
||||
|
||||
if (allocatedSize > neededSize)
|
||||
{
|
||||
Free(address + neededSize, (allocatedSize - neededSize) / KPageTableBase.PageSize);
|
||||
}
|
||||
|
||||
return address;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
private void FreeBlock(ulong block, int index)
|
||||
{
|
||||
do
|
||||
{
|
||||
block = _blocks[index++].PushBlock(block);
|
||||
}
|
||||
while (block != 0);
|
||||
}
|
||||
|
||||
public void Free(ulong address, ulong pagesCount)
|
||||
{
|
||||
if (pagesCount == 0)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
int bigIndex = _blocksCount - 1;
|
||||
|
||||
ulong start = address;
|
||||
ulong end = address + pagesCount * KPageTableBase.PageSize;
|
||||
ulong beforeStart = start;
|
||||
ulong beforeEnd = start;
|
||||
ulong afterStart = end;
|
||||
ulong afterEnd = end;
|
||||
|
||||
while (bigIndex >= 0)
|
||||
{
|
||||
ulong blockSize = _blocks[bigIndex].Size;
|
||||
|
||||
ulong bigStart = BitUtils.AlignUp (start, blockSize);
|
||||
ulong bigEnd = BitUtils.AlignDown(end, blockSize);
|
||||
|
||||
if (bigStart < bigEnd)
|
||||
{
|
||||
for (ulong block = bigStart; block < bigEnd; block += blockSize)
|
||||
{
|
||||
FreeBlock(block, bigIndex);
|
||||
}
|
||||
|
||||
beforeEnd = bigStart;
|
||||
afterStart = bigEnd;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
bigIndex--;
|
||||
}
|
||||
|
||||
for (int i = bigIndex - 1; i >= 0; i--)
|
||||
{
|
||||
ulong blockSize = _blocks[i].Size;
|
||||
|
||||
while (beforeStart + blockSize <= beforeEnd)
|
||||
{
|
||||
beforeEnd -= blockSize;
|
||||
FreeBlock(beforeEnd, i);
|
||||
}
|
||||
}
|
||||
|
||||
for (int i = bigIndex - 1; i >= 0; i--)
|
||||
{
|
||||
ulong blockSize = _blocks[i].Size;
|
||||
|
||||
while (afterStart + blockSize <= afterEnd)
|
||||
{
|
||||
FreeBlock(afterStart, i);
|
||||
afterStart += blockSize;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public static int GetAlignedBlockIndex(ulong pagesCount, ulong alignPages)
|
||||
{
|
||||
ulong targetPages = Math.Max(pagesCount, alignPages);
|
||||
|
||||
for (int i = 0; i < _memoryBlockPageShifts.Length; i++)
|
||||
{
|
||||
if (targetPages <= GetBlockPagesCount(i))
|
||||
{
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
public static int GetBlockIndex(ulong pagesCount)
|
||||
{
|
||||
for (int i = _memoryBlockPageShifts.Length - 1; i >= 0; i--)
|
||||
{
|
||||
if (pagesCount >= GetBlockPagesCount(i))
|
||||
{
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
public static ulong GetBlockSize(int index)
|
||||
{
|
||||
return 1UL << _memoryBlockPageShifts[index];
|
||||
}
|
||||
|
||||
public static ulong GetBlockPagesCount(int index)
|
||||
{
|
||||
return GetBlockSize(index) / KPageTableBase.PageSize;
|
||||
}
|
||||
|
||||
private static int CalculateManagementOverheadSize(ulong regionSize, int[] blockShifts)
|
||||
{
|
||||
int overheadSize = 0;
|
||||
|
||||
for (int i = 0; i < blockShifts.Length; i++)
|
||||
{
|
||||
int currBlockShift = blockShifts[i];
|
||||
int nextBlockShift = i != blockShifts.Length - 1 ? blockShifts[i + 1] : 0;
|
||||
overheadSize += Block.CalculateManagementOverheadSize(regionSize, currBlockShift, nextBlockShift);
|
||||
}
|
||||
|
||||
return BitUtils.AlignUp(overheadSize, KPageTableBase.PageSize);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -555,7 +555,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
|
||||
{
|
||||
KMemoryRegionManager region = GetMemoryRegionManager();
|
||||
|
||||
KernelResult result = region.AllocatePages(pagesCount, _aslrDisabled, out KPageList pageList);
|
||||
KernelResult result = region.AllocatePages(out KPageList pageList, pagesCount);
|
||||
|
||||
if (result != KernelResult.Success)
|
||||
{
|
||||
@ -712,7 +712,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
|
||||
|
||||
KMemoryRegionManager region = GetMemoryRegionManager();
|
||||
|
||||
KernelResult result = region.AllocatePages(pagesCount, _aslrDisabled, out KPageList pageList);
|
||||
KernelResult result = region.AllocatePages(out KPageList pageList, pagesCount);
|
||||
|
||||
using var _ = new OnScopeExit(() => pageList.DecrementPagesReferenceCount(Context.MemoryManager));
|
||||
|
||||
@ -1276,7 +1276,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
|
||||
|
||||
KMemoryRegionManager region = GetMemoryRegionManager();
|
||||
|
||||
KernelResult result = region.AllocatePages(remainingPages, _aslrDisabled, out KPageList pageList);
|
||||
KernelResult result = region.AllocatePages(out KPageList pageList, remainingPages);
|
||||
|
||||
using var _ = new OnScopeExit(() => pageList.DecrementPagesReferenceCount(Context.MemoryManager));
|
||||
|
||||
|
||||
@ -90,7 +90,7 @@ namespace Ryujinx.HLE.HOS
|
||||
|
||||
KMemoryRegionManager region = context.MemoryManager.MemoryRegions[(int)memoryRegion];
|
||||
|
||||
KernelResult result = region.AllocatePages((ulong)codePagesCount, false, out KPageList pageList);
|
||||
KernelResult result = region.AllocatePages(out KPageList pageList, (ulong)codePagesCount);
|
||||
|
||||
if (result != KernelResult.Success)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user