Hello.
I am currently implementing a Microblaze system with 2 external
interrupts. Let us call them bus_reset_INTR and opb_intc_0_Intr_pin  .
Now earlier I had written some code to include only opb_intc_0_Intr_pin
 and it worked perfectly fine. The code is given below:

XIntc_Initialize(&InterruptController, XPAR_OPB_INTC_0_DEVICE_ID);
microblaze_enable_interrupts();
XIntc_Connect(&InterruptController,
DEVICE_INTERRUPT_ID,(XInterruptHandler)PacketParser,(void *)0);
XIntc_Start(&InterruptController, XIN_REAL_MODE);
XIntc_Enable(&InterruptController, DEVICE_INTERRUPT_ID);
XIntc_Initialize(&InterruptController, XPAR_OPB_INTC_0_DEVICE_ID);

void PacketParser()
{
//BLAH
}

The MHS/MSS files were straight forward.

//MHS
//BLAH
 PORT npa_INTR = INTR, VEC = [0:0], DIR = I, SIGIS = INTERRUPT,
SENSITIVITY = EDGE_RISING
BEGIN microblaze
 PARAMETER INSTANCE = microblaze_0
 PARAMETER HW_VER = 4.00.a
 PARAMETER C_USE_FPU = 1
 PARAMETER C_INTERRUPT_IS_EDGE = 1
 PARAMETER C_USE_BARREL = 1
 PARAMETER C_USE_DIV = 1
 BUS_INTERFACE DLMB = dlmb
 BUS_INTERFACE ILMB = ilmb
 BUS_INTERFACE DOPB = mb_opb
 BUS_INTERFACE IOPB = mb_opb
 PORT CLK = sys_clk_s
 PORT INTERRUPT = microblaze_0_INTERRUPT
END

BEGIN opb_intc
 PARAMETER INSTANCE = opb_intc_0
 PARAMETER HW_VER = 1.00.c
 PARAMETER C_IRQ_IS_LEVEL = 0
 PARAMETER C_BASEADDR = 0x41200000
 PARAMETER C_HIGHADDR = 0x4120ffff
 BUS_INTERFACE SOPB = mb_opb
 PORT OPB_Clk = sys_clk_s
 PORT Intr = INTR
 PORT Irq = microblaze_0_INTERRUPT
END

Now when I include bus_reset_INTR in my design, everything collapses.
Both interrupts aren't detected by the processor. The C code for this
new hardware is:

XIntc_RegisterHandler(XPAR_OPB_INTC_0_BASEADDR,
XPAR_OPB_INTC_0_DCAM_SUPREMO_13_BUS_RESET_INTR_INTR,
	(XInterruptHandler)BusReset, (void *)0);
XIntc_RegisterHandler(XPAR_OPB_INTC_0_BASEADDR,
XPAR_OPB_INTC_0_DCAM_SUPREMO_13_OPB_INTC_0_INTR_PIN_INTR,
	(XInterruptHandler)PacketParser, (void *)0);
XIntc_mMasterEnable(XPAR_OPB_INTC_0_BASEADDR);
microblaze_enable_interrupts();

void PacketParser()
{
//BLAH
}
void BusReset()
{
//BLAH
}

The modified MHS is:
 PORT opb_intc_0_Intr_pin = opb_intc_0_Intr, DIR = I, VEC = [0:0],
SIGIS = INTERRUPT, SENSITIVITY = EDGE_RISING
 PORT bus_reset_INTR = bus_reset_L, DIR = I, SIGIS = INTERRUPT,
SENSITIVITY = EDGE_RISING, VEC = [0:0]
//BLAH
BEGIN microblaze
 PARAMETER INSTANCE = microblaze_0
 PARAMETER HW_VER = 4.00.a
 PARAMETER C_USE_FPU = 0
 PARAMETER C_USE_DIV = 1
 PARAMETER C_INTERRUPT_IS_EDGE = 1
 BUS_INTERFACE DLMB = dlmb
 BUS_INTERFACE ILMB = ilmb
 BUS_INTERFACE DOPB = mb_opb
 BUS_INTERFACE IOPB = mb_opb
 PORT CLK = sys_clk_s
 PORT INTERRUPT = opb_intc_0_Irq
END

BEGIN opb_intc
 PARAMETER INSTANCE = opb_intc_0
 PARAMETER HW_VER = 1.00.c
 PARAMETER C_NUM_INTR_INPUTS = 2
 PARAMETER C_IRQ_IS_LEVEL = 0
 PARAMETER C_BASEADDR = 0x41200000
 PARAMETER C_HIGHADDR = 0x4120ffff
 BUS_INTERFACE SOPB = mb_opb
 PORT Irq = opb_intc_0_Irq
 PORT Intr = opb_intc_0_Intr&bus_reset_L
END

And my MSS file reads:

 PARAMETER VERSION = 2.2.0
 PARAMETER int_handler = PacketParser, int_port = opb_intc_0_Intr_pin
 PARAMETER int_handler = BusReset, int_port = bus_reset_INTR
//BLAH

Now I am wondering where the problem could lie. If someone could help
me make this work, then that would be great!!!

Thanks
Viswanathan