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using Ryujinx.Common.Collections;
using System;
namespace Ryujinx.HLE.HOS.Kernel.Memory
{
class KMemoryBlock : IntrusiveRedBlackTreeNode<KMemoryBlock>, IComparable<KMemoryBlock>, IComparable<ulong>
{
public ulong BaseAddress { get; private set; }
public ulong PagesCount { get; private set; }
public MemoryState State { get; private set; }
public KMemoryPermission Permission { get; private set; }
public MemoryAttribute Attribute { get; private set; }
public KMemoryPermission SourcePermission { get; private set; }
public int IpcRefCount { get; private set; }
public int DeviceRefCount { get; private set; }
public KMemoryBlock(
ulong baseAddress,
ulong pagesCount,
MemoryState state,
KMemoryPermission permission,
MemoryAttribute attribute,
int ipcRefCount = 0,
int deviceRefCount = 0)
{
BaseAddress = baseAddress;
PagesCount = pagesCount;
State = state;
Attribute = attribute;
Permission = permission;
IpcRefCount = ipcRefCount;
DeviceRefCount = deviceRefCount;
}
public void SetState(KMemoryPermission permission, MemoryState state, MemoryAttribute attribute)
{
Permission = permission;
State = state;
Attribute &= MemoryAttribute.IpcAndDeviceMapped;
Attribute |= attribute;
}
public void SetIpcMappingPermission(KMemoryPermission newPermission)
{
int oldIpcRefCount = IpcRefCount++;
if ((ushort)IpcRefCount == 0)
{
throw new InvalidOperationException("IPC reference count increment overflowed.");
}
if (oldIpcRefCount == 0)
{
SourcePermission = Permission;
Permission &= ~KMemoryPermission.ReadAndWrite;
Permission |= KMemoryPermission.ReadAndWrite & newPermission;
}
Attribute |= MemoryAttribute.IpcMapped;
}
public void RestoreIpcMappingPermission()
{
int oldIpcRefCount = IpcRefCount--;
if (oldIpcRefCount == 0)
{
throw new InvalidOperationException("IPC reference count decrement underflowed.");
}
if (oldIpcRefCount == 1)
{
Permission = SourcePermission;
SourcePermission = KMemoryPermission.None;
Attribute &= ~MemoryAttribute.IpcMapped;
}
}
public KMemoryBlock SplitRightAtAddress(ulong address)
{
ulong leftAddress = BaseAddress;
ulong leftPagesCount = (address - leftAddress) / KPageTableBase.PageSize;
BaseAddress = address;
PagesCount -= leftPagesCount;
return new KMemoryBlock(
leftAddress,
leftPagesCount,
State,
Permission,
Attribute,
IpcRefCount,
DeviceRefCount);
}
public void AddPages(ulong pagesCount)
{
PagesCount += pagesCount;
}
public KMemoryInfo GetInfo()
{
ulong size = PagesCount * KPageTableBase.PageSize;
return new KMemoryInfo(
BaseAddress,
size,
State,
Permission,
Attribute,
SourcePermission,
IpcRefCount,
DeviceRefCount);
}
public int CompareTo(KMemoryBlock other)
{
if (BaseAddress < other.BaseAddress)
{
return -1;
}
else if (BaseAddress <= other.BaseAddress + other.PagesCount * KPageTableBase.PageSize - 1UL)
{
return 0;
}
else
{
return 1;
}
}
public int CompareTo(ulong address)
{
if (address < BaseAddress)
{
return 1;
}
else if (address <= BaseAddress + PagesCount * KPageTableBase.PageSize - 1UL)
{
return 0;
}
else
{
return -1;
}
}
}
}
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