Scalable and configurable system on a chip interrupt controller

1. A method for propagating a plurality of interrupts to a subsystem in a system-on-a-chip (SOC), comprising:

providing the plurality of interrupts to an interrupt controller, the interrupt controller controlling access of the plurality of interrupts to the subsystem on the SOC, the SOC including a plurality of subsystems that generate the plurality of interrupts;

processing the plurality of interrupts using the interrupt controller to generate an interrupt output, wherein the processing further comprises:

partitioning the plurality of interrupts for processing by a plurality of subsections within the interrupt controller;

applying an interrupt mask to each interrupt within each subsection in the plurality of subsections, wherein the applying generates a masked interrupt from each interrupt; and

aggregating each masked interrupt in each subsection with other masked interrupts in the same subsection into the interrupt output; and

transmitting the interrupt output to the subsystem.

2. The method of claim 1 , wherein the interrupt mask identifies logic within each subsection that processes the interrupt.

3. The method of claim 1 , further comprising:

determining whether the subsystem is dormant; and

when the subsystem is dormant, waking up the subsystem prior to transmitting the interrupt output to the subsystem.

4. The method of claim 1 , further comprising:

identifying a dedicated interrupt in the plurality of interrupts; and

routing the dedicated interrupt to the interrupt output, wherein the routing bypasses the processing using the interrupt controller.

5. The method of claim 1 , further comprising:

generating an interrupt within the interrupt controller.

6. The method of claim 5 , further comprising:

using the generated interrupt to test the processing in the interrupt controller.

7. A system for propagating a plurality of interrupts to a subsystem included on a system on a chip (SOC), comprising:

an interrupt controller including a plurality of subsections, the interrupt controller configured to:

receive the plurality of interrupts, the interrupt controller controlling access of the plurality of interrupts to the subsystem on the SOC, the SOC including a plurality of subsystems that generate the plurality of interrupts;

process the plurality of interrupts using the plurality of subsections to generate an interrupt output, wherein each subsection is configured to:

receive a subset of the plurality of interrupts;

apply an interrupt mask to each interrupt within the subset of interrupts to generate a masked interrupt for each interrupt; and

aggregate each masked interrupt within the subsection with other masked interrupts into the interrupt output; and

transmit the interrupt output to the subsystem.

8. The system of claim 7 , wherein the interrupt mask identifies logic within each subsection that processes the interrupt.

9. The system of claim 7 , further comprising a power source configured to:

determine whether the subsystem is dormant; and

when the subsystem is dormant, generate a signal to the subsystem, wherein the signal wakes up the subsystem prior to the interrupt controller transmitting the interrupt output to the subsystem.

10. The system of claim 7 , wherein the interrupt controller is further configured to:

identify a dedicated interrupt in the plurality of interrupts; and

route the dedicated interrupt to the interrupt output, wherein the routing bypasses each subsection in the interrupt controller.

11. A method for propagating a plurality of interrupts within a subsystem included on a system on a chip (SOC), comprising:

providing the plurality of interrupts to an interrupt controller, the interrupt controller controlling access of the plurality of interrupts within the subsystem;

partitioning the plurality of interrupts for processing by a plurality of subsections within the interrupt controller;

applying an interrupt mask to each interrupt within each subsection in the plurality of subsections, wherein the applying generates a masked interrupt for each interrupt;

aggregating each masked interrupt in each subsection with the other masked interrupts in the same subsection into an interrupt output; and

using a cross-bar configuration to transmit the interrupt output of each subsection within the SOC.

12. The method of claim 11 , wherein at least one interrupt in the plurality of interrupts is an internal interrupt.

13. The method of claim 11 , wherein at least one interrupt in the plurality of interrupts is an external interrupt.

14. The method of claim 11 , further comprising transmitting the interrupt output to another subsystem in the SOC.

15. The method of claim 11 , further comprising transmitting the interrupt output to a mini-subsystem within the subsystem.

16. A system for propagating a plurality of interrupts within a subsystem in a system on a chip (SOC), comprising:

an interrupt controller configured to:

receive the plurality of interrupts within the subsystem;

partition the plurality of interrupts into a plurality of subsets for processing by a plurality of subsections within the interrupt controller, wherein each subsection within the plurality of subsections is configured to:

apply an interrupt mask to each interrupt within the interrupt subset to generate a masked interrupt for each interrupt; and

aggregate each masked interrupt in each subsection with the other masked interrupts in the same subsection into an interrupt output; and

use a cross-bar configuration to transmit the interrupt output of each subsection within the SOC.

17. The system of claim 16 , wherein at least one interrupt in the plurality of interrupts is an internal interrupt.

18. The system of claim 16 , wherein at least one interrupt in the plurality of interrupts is an external interrupt.

19. The system of claim 16 , further comprising transmitting the interrupt output to another subsystem in the SOC.

20. The system of claim 16 , further comprising transmitting the interrupt output to a mini-subsystem within the subsystem.