Crate arm_gic

Driver for the Arm Generic Interrupt Controller version 3 or 4, on aarch64.

This top level module contains functions that are not specific to any particular interrupt controller, as support for other GIC versions may be added in future.

Example

use arm_gic::{
    gicv3::{GicV3, IntId, SgiTarget},
    irq_enable,
};

// Base addresses of the GICv3 distributor and redistributor.
const GICD_BASE_ADDRESS: *mut u64 = 0x800_0000 as _;
const GICR_BASE_ADDRESS: *mut u64 = 0x80A_0000 as _;

// Initialise the GIC.
let mut gic = unsafe { GicV3::new(GICD_BASE_ADDRESS, GICR_BASE_ADDRESS) };
gic.setup();

// Configure an SGI and then send it to ourself.
let sgi_intid = IntId::sgi(3);
GicV3::set_priority_mask(0xff);
gic.set_interrupt_priority(sgi_intid, 0x80);
gic.enable_interrupt(sgi_intid, true);
irq_enable();
GicV3::send_sgi(
    sgi_intid,
    SgiTarget::List {
        affinity3: 0,
        affinity2: 0,
        affinity1: 0,
        target_list: 0b1,
    },
);

Modules

• gicv3
  Driver for the Arm Generic Interrupt Controller version 3 (or 4).

Functions

• irq_disable
  Disables debug, SError, IRQ and FIQ exceptions.
• irq_enable
  Enables debug, SError, IRQ and FIQ exceptions.
• wfi
  Waits for an interrupt.