1.28.8 Generic Interrupt Controller (GIC)
The integrated GIC collates and arbitrates from a large number of interrupt sources. It provides:
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Masking of interrupts.
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Prioritization of interrupts.
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Distribution of the interrupts to the target processors.
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Tracking the status of interrupts.
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Generation of interrupts by software.
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Support for Security Extensions. Support for Virtualization Extensions.
Using The Library
Functions provided by CMSIS for accessing GIC registers are used for GIC configuration. GIC plib provides functions for setting up the software vector table for used for interrupt redirection.
Library Interface
Generic Interrupt Controller peripheral library provides the following interfaces:
Functions
| Name | Description |
|---|---|
| GIC_Initialize | Initializes GIC hardware and in memory vector table for interrupt redirection |
| GIC_RegisterSGIInterruptHandler | Registers handler for Software Generated Interrupts |
| GIC_RegisterPeripheralInterruptHandler | Registers handler for Software Generated Interrupts |
Data types and constants
| Name | Type | Description |
|---|---|---|
| SGI_HANDLER | Typedef | SGI interrupt handler function pointer |
| PPI_SPI_HANDLER | Typedef | PPI/SPI interrupt handler function pointer |