mirror of
https://github.com/ryujinx-mirror/ryujinx.git
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104 lines
3.1 KiB
C#
104 lines
3.1 KiB
C#
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using Ryujinx.HLE.HOS.Kernel.Process;
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using Ryujinx.Memory;
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using Ryujinx.Memory.Range;
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using System;
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using System.Collections.Generic;
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namespace Ryujinx.HLE.HOS.Kernel.Memory
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{
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class SharedMemoryStorage
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{
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private readonly KernelContext _context;
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private readonly KPageList _pageList;
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private readonly ulong _size;
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private IVirtualMemoryManager _borrowerMemory;
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private ulong _borrowerVa;
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public SharedMemoryStorage(KernelContext context, KPageList pageList)
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{
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_context = context;
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_pageList = pageList;
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_size = pageList.GetPagesCount() * KPageTableBase.PageSize;
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foreach (KPageNode pageNode in pageList)
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{
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ulong address = pageNode.Address - DramMemoryMap.DramBase;
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ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
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context.Memory.Commit(address, size);
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}
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}
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public void Borrow(KProcess dstProcess, ulong va)
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{
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ulong currentOffset = 0;
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foreach (KPageNode pageNode in _pageList)
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{
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ulong address = pageNode.Address - DramMemoryMap.DramBase;
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ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
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dstProcess.CpuMemory.Write(va + currentOffset, _context.Memory.GetSpan(address + currentOffset, (int)size));
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currentOffset += size;
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}
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_borrowerMemory = dstProcess.CpuMemory;
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_borrowerVa = va;
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}
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public void ZeroFill()
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{
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for (ulong offset = 0; offset < _size; offset += sizeof(ulong))
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{
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GetRef<ulong>(offset) = 0;
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}
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}
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public ref T GetRef<T>(ulong offset) where T : unmanaged
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{
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if (_borrowerMemory == null)
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{
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if (_pageList.Nodes.Count == 1)
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{
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ulong address = _pageList.Nodes.First.Value.Address - DramMemoryMap.DramBase;
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return ref _context.Memory.GetRef<T>(address + offset);
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}
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throw new NotImplementedException("Non-contiguous shared memory is not yet supported.");
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}
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else
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{
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return ref _borrowerMemory.GetRef<T>(_borrowerVa + offset);
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}
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}
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public IEnumerable<HostMemoryRange> GetRanges()
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{
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if (_borrowerMemory == null)
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{
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var ranges = new List<HostMemoryRange>();
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foreach (KPageNode pageNode in _pageList)
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{
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ulong address = pageNode.Address - DramMemoryMap.DramBase;
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ulong size = pageNode.PagesCount * KPageTableBase.PageSize;
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ranges.Add(new HostMemoryRange(_context.Memory.GetPointer(address, size), size));
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}
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return ranges;
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}
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else
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{
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return _borrowerMemory.GetPhysicalRegions(_borrowerVa, _size);
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}
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}
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public KPageList GetPageList()
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{
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return _pageList;
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}
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}
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}
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