Struct Plic

pub struct Plic { /* private fields */ }

Implementations

impl Plic

pub const fn new(base: StaticRef<PlicRegisters>) -> Self

pub fn clear_all_pending(&self)

Clear all pending interrupts.

pub fn enable_all(&self)

Enable all interrupts.

pub fn disable(&self, index: u32)

Disable specific interrupt.

pub fn disable_all(&self)

Disable all interrupts.

pub fn next_pending(&self) -> Option<u32>

Get the index (0-256) of the lowest number pending interrupt, or None if none is pending. RISC-V PLIC has a “claim” register which makes it easy to grab the highest priority pending interrupt.

pub unsafe fn save_interrupt(&self, index: u32)

Save the current interrupt to be handled later This will save the interrupt at index internally to be handled later. Interrupts must be disabled before this is called. Saved interrupts can be retrieved by calling get_saved_interrupts(). Saved interrupts are cleared when 'complete() is called.

pub fn get_saved_interrupts(&self) -> Option<u32>

The next_pending() function will only return enabled interrupts. This function will return a pending interrupt that has been disabled by save_interrupt().

pub unsafe fn complete(&self, index: u32)

Signal that an interrupt is finished being handled. In Tock, this should be called from the normal main loop (not the interrupt handler). Interrupts must be disabled before this is called.