MicroBlaze MCS General Purpose Input (GPI1_Interrupt)

Question

So I have generated a MicroBlaze MCS v1.2 Core and I enabled General Purpose Interrupt 1 (32-bits) and I checked the box for "GPI Interrupt".
Now the "GPI Interrupt" is set as an output node, while the GPI1 is set up as an interrupt.
I have searched all over the Xilinx documentation and this forum, and I cannot determine the answer to the following:
What and when does GPI1_Interrupt trigger? And why is it an output signal and not an input signal?
Here is a copy of the entity of my core:
entity microblaze_mcs_core is
port (
Clk : in STD_LOGIC := 'X';
Reset : in STD_LOGIC := 'X';
INTC_IRQ : out STD_LOGIC;
GPI1_Interrupt : out STD_LOGIC;
GPI2_Interrupt : out STD_LOGIC;
GPO1 : out STD_LOGIC_VECTOR ( 31 downto 0 );
GPO2 : out STD_LOGIC_VECTOR ( 31 downto 0 );
GPI1 : in STD_LOGIC_VECTOR ( 31 downto 0 );
GPI2 : in STD_LOGIC_VECTOR ( 31 downto 0 )
end microblaze_mcs_core;
I am basically trying to figure out what is the best way to transfer data to and from my MicroBlaze core.  Please note that I am using this core from LabVIEW FPGA, so any logic I use will have to be implemented by me! 

Answer 1

Duplicate post. Look here.
Regards,
Chris Delvizis
National Instruments