ARM system emulator

[Swedha R]

Hi,
In the qemu website , under the section ARM system emulator, they mentioned like 

• Secure-World-only devices if the CPU has TrustZone:
• A second PL011 UART
• A second PL061 GPIO controller, with GPIO lines for triggering a system reset or system poweroff
• A secure flash memory
• 16MB of secure RAM
  
• I need to know how to work with the PL061 GPIO controller.
  And need to know , Is it restricted to use the PL061 GPIO lines only for triggering a system reset or system poweroff.
  If that is the case means, how to do that ? 
  Please provide any resource, bcz I didn't get anything to work in a virtual environment.
  
  Thanks in advance
  Regards
  Swedha R