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ryujinx-fork/ARMeilleure/State/ExecutionContext.cs
gdkchan 0c87bf9ea4
Refactor CPU interface to allow the implementation of other CPU emulators (#3362)
* Refactor CPU interface

* Use IExecutionContext interface on SVC handler, change how CPU interrupts invokes the handlers

* Make CpuEngine take a ITickSource rather than returning one

The previous implementation had the scenario where the CPU engine had to implement the tick source in mind, like for example, when we have a hypervisor and the game can read CNTPCT on the host directly. However given that we need to do conversion due to different frequencies anyway, it's not worth it. It's better to just let the user pass the tick source and redirect any reads to CNTPCT to the user tick source

* XML docs for the public interfaces

* PPTC invalidation due to NativeInterface function name changes

* Fix build of the CPU tests

* PR feedback
2022-05-31 16:29:35 -03:00

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4.4 KiB
C#

using ARMeilleure.Memory;
using System;
namespace ARMeilleure.State
{
public class ExecutionContext
{
private const int MinCountForCheck = 4000;
private NativeContext _nativeContext;
internal IntPtr NativeContextPtr => _nativeContext.BasePtr;
private bool _interrupted;
private readonly ICounter _counter;
public ulong Pc => _nativeContext.GetPc();
public uint CtrEl0 => 0x8444c004;
public uint DczidEl0 => 0x00000004;
public ulong CntfrqEl0 => _counter.Frequency;
public ulong CntpctEl0 => _counter.Counter;
// CNTVCT_EL0 = CNTPCT_EL0 - CNTVOFF_EL2
// Since EL2 isn't implemented, CNTVOFF_EL2 = 0
public ulong CntvctEl0 => CntpctEl0;
public long TpidrEl0 { get; set; }
public long TpidrroEl0 { get; set; }
public uint Pstate
{
get => _nativeContext.GetPstate();
set => _nativeContext.SetPstate(value);
}
public FPCR Fpcr { get; set; }
public FPSR Fpsr { get; set; }
public FPCR StandardFpcrValue => (Fpcr & (FPCR.Ahp)) | FPCR.Dn | FPCR.Fz;
public bool IsAarch32 { get; set; }
internal ExecutionMode ExecutionMode
{
get
{
if (IsAarch32)
{
return GetPstateFlag(PState.TFlag)
? ExecutionMode.Aarch32Thumb
: ExecutionMode.Aarch32Arm;
}
else
{
return ExecutionMode.Aarch64;
}
}
}
public bool Running
{
get => _nativeContext.GetRunning();
private set => _nativeContext.SetRunning(value);
}
private readonly ExceptionCallbackNoArgs _interruptCallback;
private readonly ExceptionCallback _breakCallback;
private readonly ExceptionCallback _supervisorCallback;
private readonly ExceptionCallback _undefinedCallback;
public ExecutionContext(
IJitMemoryAllocator allocator,
ICounter counter,
ExceptionCallbackNoArgs interruptCallback = null,
ExceptionCallback breakCallback = null,
ExceptionCallback supervisorCallback = null,
ExceptionCallback undefinedCallback = null)
{
_nativeContext = new NativeContext(allocator);
_counter = counter;
_interruptCallback = interruptCallback;
_breakCallback = breakCallback;
_supervisorCallback = supervisorCallback;
_undefinedCallback = undefinedCallback;
Running = true;
_nativeContext.SetCounter(MinCountForCheck);
}
public ulong GetX(int index) => _nativeContext.GetX(index);
public void SetX(int index, ulong value) => _nativeContext.SetX(index, value);
public V128 GetV(int index) => _nativeContext.GetV(index);
public void SetV(int index, V128 value) => _nativeContext.SetV(index, value);
public bool GetPstateFlag(PState flag) => _nativeContext.GetPstateFlag(flag);
public void SetPstateFlag(PState flag, bool value) => _nativeContext.SetPstateFlag(flag, value);
public bool GetFPstateFlag(FPState flag) => _nativeContext.GetFPStateFlag(flag);
public void SetFPstateFlag(FPState flag, bool value) => _nativeContext.SetFPStateFlag(flag, value);
internal void CheckInterrupt()
{
if (_interrupted)
{
_interrupted = false;
_interruptCallback?.Invoke(this);
}
_nativeContext.SetCounter(MinCountForCheck);
}
public void RequestInterrupt()
{
_interrupted = true;
}
internal void OnBreak(ulong address, int imm)
{
_breakCallback?.Invoke(this, address, imm);
}
internal void OnSupervisorCall(ulong address, int imm)
{
_supervisorCallback?.Invoke(this, address, imm);
}
internal void OnUndefined(ulong address, int opCode)
{
_undefinedCallback?.Invoke(this, address, opCode);
}
public void StopRunning()
{
Running = false;
_nativeContext.SetCounter(0);
}
public void Dispose()
{
_nativeContext.Dispose();
}
}
}