General improvements:

- Added drafts for event flag emulation;
- Implemented memory locking/unlocking;
- Refactored common SC_Memory objects;
- Implemented VM (virtual memory) syscalls;
- Improved cellGameBootCheck;
- Added more dummy values to cellVideoOutGetDeviceInfo;
- Mapped functions sys_mmapper_allocate_memory and sys_mmapper_map_memory to sysPrxForUser;
- Mapped syscalls 341 and 342 (duplicates of 324 and 325) to sys_memory_container_create and sys_memory_container_destroy;

Improved PKG installation routine:
- Allow immediate game booting;
- Fixed and improved game folder path handling.

rpcs3/Emu/Memory/DynamicMemoryBlockBase.inl

@@ -133,6 +133,7 @@ bool DynamicMemoryBlockBase<PT>::Free(u64 addr)
 	{
 		if(addr == m_used_mem[i].addr)
 		{
+			if(IsLocked(m_used_mem[i].addr)) return false;
 			m_used_mem.RemoveAt(i);
 			return true;
 		}
@@ -158,3 +159,68 @@ u8* DynamicMemoryBlockBase<PT>::GetMem(u64 addr) const
 	assert(0);
 	return nullptr;
 }
+
+template<typename PT>
+bool DynamicMemoryBlockBase<PT>::IsLocked(const u64 addr)
+{
+	for(u32 i=0; i<m_locked_mem.GetCount(); ++i)
+	{
+		if(addr == m_locked_mem[i].addr)
+		{
+			return true;
+		}
+	}
+
+	return false;
+}
+
+template<typename PT>
+void DynamicMemoryBlockBase<PT>::AppendLockedMem(u64 addr, u32 size)
+{
+	m_locked_mem.Move(new MemBlockInfo(addr, size));
+}
+
+template<typename PT>
+bool DynamicMemoryBlockBase<PT>::Lock(u64 addr, u32 size)
+{
+	if(!IsInMyRange(addr, size))
+	{
+		assert(0);
+		return false;
+	}
+
+	if(IsMyAddress(addr) || IsMyAddress(addr + size - 1))
+	{
+		return false;
+	}
+
+	AppendLockedMem(addr, size);
+
+	return true;
+}
+
+template<typename PT>
+bool DynamicMemoryBlockBase<PT>::Unlock(u64 addr , u32 size)
+{	
+	for(u32 i=0; i<m_locked_mem.GetCount(); ++i)
+	{
+		if(addr == m_locked_mem[i].addr)
+		{
+			if(m_locked_mem.Get(i).size > size)
+			{
+				m_locked_mem.Get(i).size -= size;
+			}
+			else if(m_locked_mem.Get(i).size == size)
+			{
+				m_locked_mem.RemoveAt(i);
+			}
+			else
+			{
+				return false;
+			}
+			return true;
+		}
+	}
+
+	return false;
+}