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ARM Interrupt Handler Component Overview

Learn how the ARM Interrupt Handler Component handles seven cases like Reset, Data Abort, FIQ, IRQ, and more with ROM files for memory addresses and CPSR alterations.

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ARM Interrupt Handler Component Overview

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  1. Interrupt Handler Component must handle the following seven cases: • Reset (Highest Priority) • Data Abort • FIQ • IRQ • Prefetch Abort • Undefined Instruction • Software Interrupt (SWI) (Lowest Priority)

  2. Implementation • One ROM file handles memory addresses. • 3-bit input leads to 32-bit address for PC. • Second ROM file handles CPSR alterations. • 4-bit input leads to lower 8 bits of CPSR. • Priorities of the interrupts are handled with CLZ functionality. • Lastly, no interrupts leads to “Active = 0”.

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