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kernel: Implement MapTransferMemory and UnmapTransferMemory (#2386)

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Based on my reversing of kernel 12.0.0
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Mary 2021-06-23 21:52:11 +02:00 • committed by GitHub
parent 50ba233ac6
commit 0644db02ad
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89
Ryujinx.HLE/HOS/Kernel/Memory/KTransferMemory.cs
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@ -1,3 +1,4 @@
using Ryujinx.Common;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Process;
using Ryujinx.Memory.Range;
@ -15,6 +16,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
private readonly List<HostMemoryRange> _ranges;
private readonly SharedMemoryStorage _storage;
public ulong Address { get; private set; }
public ulong Size { get; private set; }
@ -28,6 +31,15 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
_ranges = new List<HostMemoryRange>();
}
public KTransferMemory(KernelContext context, SharedMemoryStorage storage) : base(context)
{
_storage = storage;
Permission = KMemoryPermission.ReadAndWrite;
_hasBeenInitialized = true;
_isMapped = false;
}
public KernelResult Initialize(ulong address, ulong size, KMemoryPermission permission)
{
KProcess creator = KernelStatic.GetCurrentProcess();
@ -52,6 +64,83 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
return result;
}
public KernelResult MapIntoProcess(
KPageTableBase memoryManager,
ulong address,
ulong size,
KProcess process,
KMemoryPermission permission)
{
if (_storage == null)
{
throw new NotImplementedException();
}
ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
var pageList = _storage.GetPageList();
if (pageList.GetPagesCount() != pagesCountRounded)
{
return KernelResult.InvalidSize;
}
if (permission != Permission || _isMapped)
{
return KernelResult.InvalidState;
}
MemoryState state = Permission == KMemoryPermission.None ? MemoryState.TransferMemoryIsolated : MemoryState.TransferMemory;
KernelResult result = memoryManager.MapPages(address, pageList, state, KMemoryPermission.ReadAndWrite);
if (result == KernelResult.Success)
{
_isMapped = true;
if (!memoryManager.SupportsMemoryAliasing)
{
_storage.Borrow(process, address);
}
}
return result;
}
public KernelResult UnmapFromProcess(
KPageTableBase memoryManager,
ulong address,
ulong size,
KProcess process)
{
if (_storage == null)
{
throw new NotImplementedException();
}
ulong pagesCountRounded = BitUtils.DivRoundUp(size, KPageTableBase.PageSize);
var pageList = _storage.GetPageList();
ulong pagesCount = pageList.GetPagesCount();
if (pagesCount != pagesCountRounded)
{
return KernelResult.InvalidSize;
}
var ranges = _storage.GetRanges();
MemoryState state = Permission == KMemoryPermission.None ? MemoryState.TransferMemoryIsolated : MemoryState.TransferMemory;
KernelResult result = memoryManager.UnmapPages(address, pagesCount, ranges, state);
if (result == KernelResult.Success)
{
_isMapped = false;
}
return result;
}
protected override void Destroy()
{
if (_hasBeenInitialized)