Struct LocalApic 

pub struct LocalApic { /* private fields */ }

Local APIC controller.

Wraps the memory-mapped register file for the per-CPU Local APIC. All register accesses use volatile reads/writes to prevent compiler reordering.

Implementations

impl LocalApic

pub fn read_id(&self) -> u8

Read the Local APIC ID (bits 31:24 of the ID register).

pub fn read_version(&self) -> u32

Read the Local APIC version register.

pub fn send_eoi(&self)

Send an End-Of-Interrupt signal. Must be called at the end of every Local APIC interrupt handler.

pub fn setup_timer(&self, vector: u8, divide: u8, initial_count: u32)

Configure the APIC timer for periodic interrupts.

• vector: IDT vector number for the timer interrupt.
• divide: Timer divisor encoded as the Divide Configuration Register value (e.g., 0x03 = divide by 16, 0x0B = divide by 1).
• initial_count: Initial countdown value. The timer fires when it reaches zero and reloads automatically in periodic mode.

pub fn stop_timer(&self)

Stop the APIC timer by zeroing the initial count and masking the LVT Timer entry.

pub fn read_timer_count(&self) -> u32

Read the current timer count (counts down from the initial value).

pub fn send_ipi(&self, dest: u8, vector: u8)

Write the Interrupt Command Register to send an IPI.

• dest: Destination APIC ID.
• vector: Interrupt vector.

pub fn send_init_ipi(&self, dest: u8)

Send an INIT IPI to a target CPU (used in AP startup sequence).

pub fn send_startup_ipi(&self, dest: u8, startup_page: u8)

Send a Startup IPI (SIPI) to a target CPU.

startup_page is the physical page number (e.g., 0x08 for 0x8000).

pub fn send_ipi_all_excluding_self(&self, vector: u8)

Broadcast IPI to all CPUs except self.