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Add the inter-processor-call facilities

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This commit is contained in:
Zhang Junyang
2024-08-15 19:43:37 +08:00
committed by Tate, Hongliang Tian
parent 63364813a8
commit 425027677b
4 changed files with 114 additions and 2 deletions
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24
ostd/src/arch/x86/irq.rs
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@ -153,3 +153,27 @@ impl Drop for IrqCallbackHandle {
CALLBACK_ID_ALLOCATOR.get().unwrap().lock().free(self.id);
}
}
/// Sends a general inter-processor interrupt (IPI) to the specified CPU.
///
/// # Safety
///
/// The caller must ensure that the CPU ID and the interrupt number corresponds
/// to a safe function to call.
pub(crate) unsafe fn send_ipi(cpu_id: u32, irq_num: u8) {
use crate::arch::kernel::apic::{self, Icr};
let icr = Icr::new(
apic::ApicId::from(cpu_id),
apic::DestinationShorthand::NoShorthand,
apic::TriggerMode::Edge,
apic::Level::Assert,
apic::DeliveryStatus::Idle,
apic::DestinationMode::Physical,
apic::DeliveryMode::Fixed,
irq_num,
);
apic::borrow(|apic| {
apic.send_ipi(icr);
});
}