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using Ryujinx.Horizon.Common;
using Ryujinx.Memory;
using Ryujinx.Memory.Range;
using System;
using System.Collections.Generic;
using System.Diagnostics;
namespace Ryujinx.HLE.HOS.Kernel.Memory
{
class KPageTable : KPageTableBase
{
private readonly IVirtualMemoryManager _cpuMemory;
protected override bool Supports4KBPages => _cpuMemory.Supports4KBPages;
public KPageTable(KernelContext context, IVirtualMemoryManager cpuMemory, ulong reservedAddressSpaceSize) : base(context, reservedAddressSpaceSize)
{
_cpuMemory = cpuMemory;
}
/// <inheritdoc/>
protected override IEnumerable<HostMemoryRange> GetHostRegions(ulong va, ulong size)
{
return _cpuMemory.GetHostRegions(va, size);
}
/// <inheritdoc/>
protected override void GetPhysicalRegions(ulong va, ulong size, KPageList pageList)
{
var ranges = _cpuMemory.GetPhysicalRegions(va, size);
foreach (var range in ranges)
{
pageList.AddRange(range.Address + DramMemoryMap.DramBase, range.Size / PageSize);
}
}
/// <inheritdoc/>
protected override ReadOnlySpan<byte> GetSpan(ulong va, int size)
{
return _cpuMemory.GetSpan(va, size);
}
/// <inheritdoc/>
protected override Result MapMemory(ulong src, ulong dst, ulong pagesCount, KMemoryPermission oldSrcPermission, KMemoryPermission newDstPermission)
{
KPageList pageList = new();
GetPhysicalRegions(src, pagesCount * PageSize, pageList);
Result result = Reprotect(src, pagesCount, KMemoryPermission.None);
if (result != Result.Success)
{
return result;
}
result = MapPages(dst, pageList, newDstPermission, MemoryMapFlags.Private, false, 0);
if (result != Result.Success)
{
Result reprotectResult = Reprotect(src, pagesCount, oldSrcPermission);
Debug.Assert(reprotectResult == Result.Success);
}
return result;
}
/// <inheritdoc/>
protected override Result UnmapMemory(ulong dst, ulong src, ulong pagesCount, KMemoryPermission oldDstPermission, KMemoryPermission newSrcPermission)
{
ulong size = pagesCount * PageSize;
KPageList srcPageList = new();
KPageList dstPageList = new();
GetPhysicalRegions(src, size, srcPageList);
GetPhysicalRegions(dst, size, dstPageList);
if (!dstPageList.IsEqual(srcPageList))
{
return KernelResult.InvalidMemRange;
}
Result result = Unmap(dst, pagesCount);
if (result != Result.Success)
{
return result;
}
result = Reprotect(src, pagesCount, newSrcPermission);
if (result != Result.Success)
{
Result mapResult = MapPages(dst, dstPageList, oldDstPermission, MemoryMapFlags.Private, false, 0);
Debug.Assert(mapResult == Result.Success);
}
return result;
}
/// <inheritdoc/>
protected override Result MapPages(
ulong dstVa,
ulong pagesCount,
ulong srcPa,
KMemoryPermission permission,
MemoryMapFlags flags,
bool shouldFillPages,
byte fillValue)
{
ulong size = pagesCount * PageSize;
Context.CommitMemory(srcPa - DramMemoryMap.DramBase, size);
_cpuMemory.Map(dstVa, srcPa - DramMemoryMap.DramBase, size, flags);
if (DramMemoryMap.IsHeapPhysicalAddress(srcPa))
{
Context.MemoryManager.IncrementPagesReferenceCount(srcPa, pagesCount);
}
if (shouldFillPages)
{
_cpuMemory.Fill(dstVa, size, fillValue);
}
return Result.Success;
}
/// <inheritdoc/>
protected override Result MapPages(
ulong address,
KPageList pageList,
KMemoryPermission permission,
MemoryMapFlags flags,
bool shouldFillPages,
byte fillValue)
{
using var scopedPageList = new KScopedPageList(Context.MemoryManager, pageList);
ulong currentVa = address;
foreach (var pageNode in pageList)
{
ulong addr = pageNode.Address - DramMemoryMap.DramBase;
ulong size = pageNode.PagesCount * PageSize;
Context.CommitMemory(addr, size);
_cpuMemory.Map(currentVa, addr, size, flags);
if (shouldFillPages)
{
_cpuMemory.Fill(currentVa, size, fillValue);
}
currentVa += size;
}
scopedPageList.SignalSuccess();
return Result.Success;
}
/// <inheritdoc/>
protected override Result MapForeign(IEnumerable<HostMemoryRange> regions, ulong va, ulong size)
{
ulong offset = 0;
foreach (var region in regions)
{
_cpuMemory.MapForeign(va + offset, region.Address, region.Size);
offset += region.Size;
}
return Result.Success;
}
/// <inheritdoc/>
protected override Result Unmap(ulong address, ulong pagesCount)
{
KPageList pagesToClose = new();
var regions = _cpuMemory.GetPhysicalRegions(address, pagesCount * PageSize);
foreach (var region in regions)
{
ulong pa = region.Address + DramMemoryMap.DramBase;
if (DramMemoryMap.IsHeapPhysicalAddress(pa))
{
pagesToClose.AddRange(pa, region.Size / PageSize);
}
}
_cpuMemory.Unmap(address, pagesCount * PageSize);
pagesToClose.DecrementPagesReferenceCount(Context.MemoryManager);
return Result.Success;
}
/// <inheritdoc/>
protected override Result Reprotect(ulong address, ulong pagesCount, KMemoryPermission permission)
{
_cpuMemory.Reprotect(address, pagesCount * PageSize, permission.Convert());
return Result.Success;
}
/// <inheritdoc/>
protected override Result ReprotectAndFlush(ulong address, ulong pagesCount, KMemoryPermission permission)
{
// TODO: Flush JIT cache.
return Reprotect(address, pagesCount, permission);
}
/// <inheritdoc/>
protected override void SignalMemoryTracking(ulong va, ulong size, bool write)
{
_cpuMemory.SignalMemoryTracking(va, size, write);
}
/// <inheritdoc/>
protected override void Write(ulong va, ReadOnlySpan<byte> data)
{
_cpuMemory.Write(va, data);
}
}
}
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