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CPU Interrupt Hardware

CPU Interrupt Hardware. CPU accepts interrupt request: 1. Save PC and Flag register 2. Change mode bit 3. Push ISR’s starting address to PC. ISR { 1. Inhibit INT; 2. Pop CPU registers and save them in PCB; 3. Check which type of INT 4. Check which event occurs/what device requests

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CPU Interrupt Hardware

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  1. CPU Interrupt Hardware

  2. CPU accepts interrupt request: • 1. Save PC and Flag register • 2. Change mode bit • 3. Push ISR’s starting address to PC

  3. ISR { • 1. Inhibit INT; • 2. Pop CPU registers and save them in PCB; • 3. Check which type of INT • 4. Check which event occurs/what device requests INT • 5. Perform corresponding interrupt service • 6. Set clock timer • 7. Clear corresponding INT bits and event register and in INT register • 8. Scheduler () • {Select a process from Ready Queue; • Context switch;}

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