몰랐거나, 알고싶지 않았던 것들

LPI: Locality-specific Peripheral Interrupt

ITS: Interrupt Translation Service

GICv3에는 기존 GICv2와는 다르게 위 내용들이 추가되었다.

출처: http://infocenter.arm.com/help/topic/com.arm.doc.dai0492b/GICv3_Software_Overview_Official_Release_B.pdf

level sensitive only

• Signaling from device to GIC: interrupt state: Pending
• Sending the signal from GIC to CPU: Pending
• Acknowledge (ACK) the interrupt through CPU interface: Active & Pending
• Operating System reprogram the device and device switch from high to low: Active
• CPU deactivate(write corresponding interrupt to EOI) the interrupt: Active to Inactive