[#94558] CortexM: Allow setting CPUWAIT in constructor

This is useful for scenarios where you would like the CPU to start in a
halted state, and stay halted even after being reset. Without this
constructor parameter, you'd have to set both CpuWaitSignal and IsHalted
in order to achieve this, which is inconsistent.

The construction of a new CPU should behave like a reset, and if CPUWAIT
is set before the reset (i.e. as a constructor argument) then the CPU
should be halted from the very beginning.

Author: martinjonsson01

src/Emulator/Cores/Arm-M/CortexM.cs

@@ -25,11 +25,13 @@ namespace Antmicro.Renode.Peripherals.CPU
     public partial class CortexM : Arm, IPeripheralWithTransactionState
     {
         public CortexM(string cpuType, IMachine machine, NVIC nvic, [NameAlias("id")] uint cpuId = 0, Endianess endianness = Endianess.LittleEndian,
-            uint? fpuInterruptNumber = null, uint? numberOfMPURegions = null, bool enableTrustZone = false, uint? numberOfSAURegions = null, uint? numberOfIDAURegions = null)
+            uint? fpuInterruptNumber = null, uint? numberOfMPURegions = null, bool enableTrustZone = false, uint? numberOfSAURegions = null, uint? numberOfIDAURegions = null, bool isCpuWaitSignalSet = false)
             : base(cpuType, machine, cpuId, endianness, numberOfMPURegions)
         {
             CpuWaitSignal = new GPIO();
+            CpuWaitSignal.Set(isCpuWaitSignalSet);
             CpuWaitSignal.AddStateChangedHook((state) => UpdateCPUWait(state));
+            IsHalted = CpuWaitSignal.IsSet;
 
             if(nvic == null)
             {