Method for dynamic allocation of interrupt pins

Abstract

The present invention discloses a dynamic distribution method for interrupt pin, which is suitable to distribute a plurality of interrupt pins in a control chip. The method reads a hardware routing table at first, and finds out a plurality of slots using the interrupt pins from the table; then the slots are sorted according to the number of the interrupt pins used in the slots; afterwards, beginning with the slots sorted in the front, the interrupt pins are distributed in turn according to a plurality of registers corresponding to the slots in the control chip; whenever the distribution of the interrupt pins is finished in turn, the distribution is repeated from the beginning again and again until the interrupt pins are distributed to the registers of all the slots.

Description

technical field [0001] The present invention relates to a routing method, and in particular to a method for dynamically allocating interrupt pins. Background technique [0002] An interrupt request (Interrup Request, IRQ) is used to notify and request the processor to suspend work when a certain device is about to perform a specific action, so as to perform the corresponding computing action. The sending of this interrupt request is performed through so-called interrupt lines, and the number of these interrupt lines varies depending on the interrupt controller used by the motherboard. A traditional computer uses a Programmable Interrupt Controller (Programmable Interrupt Controller, PIC), which includes 16 interrupt lines. However, these interrupt lines are still too few for computer equipment with increasingly powerful functions and new input and output devices. Most of the interrupt lines will be occupied, and even multiple hardware devices must be shared together. Accor...

AI Technical Summary

Problems solved by technology

It can be seen that the allocation of IOAPIC interrupt lines is not optimal at this time, resulting in some interrupt pins being busy and some interrupt pins being quite idle. In fact, there is still much room for improvement in this situation.

Images