interrupts

I have the following bit of code on an embedded platform, and I am trying to figure out what all these defines mean....

I am pretty sure they pertain to interrupt operations, but I have not worked with interrupts before so I am not sure of the particulars.

Each register contains 8 bits, one for each of 8 GPIO lines, so toggling one bit should enable/disable or do something else with interrupts for that GPIO line.

// No idea what type 1 and 2 do....  Something to do with edge and high?

#define GPIO_B_TYPE1 ((volatile uint32_t *)(gpio_ptr + 0x00AC))
#define GPIO_B_TYPE2 ((volatile uint32_t *)(gpio_ptr + 0x00B0))

//  end of interrupt?  How would this be used?

#define GPIO_B_EOI ((volatile uint32_t *)(gpio_ptr + 0x00B4))

// Interrupt enable?

#define GPIO_B_INTENB ((volatile uint32_t *)(gpio_ptr + 0x00B8))

// ????  No idea.

#define GPIO_B_INTSTS ((volatile uint32_t *)(gpio_ptr + 0x00BC))

I am open to guesses, comments, suggestions, or just plain humor....
.

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