From 0527ef090e4a5ff2dd8dc32170d505c44ee015fa Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 18 Nov 2025 16:05:25 -0500
Subject: kern/amd64: lapic: Add Local APIC timer interface

This commit adds an interface to perform a oneshot operation with the
Local APIC timer as well as providing a stub interrupt service routine
for it.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/cpu/idt.S | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'sys/arch/amd64/cpu/idt.S')

diff --git a/sys/arch/amd64/cpu/idt.S b/sys/arch/amd64/cpu/idt.S
index c430a44..729d958 100644
--- a/sys/arch/amd64/cpu/idt.S
+++ b/sys/arch/amd64/cpu/idt.S
@@ -306,6 +306,15 @@ page_fault:
     jmp 1b
     hlt
 
+    .globl lapic_tmr_isr
+lapic_tmr_isr:
+    KFENCE
+    push_frame 0x81
+    nop
+    pop_frame 0x81
+    KFENCE
+    iretq
+
     .section .data
     .align 8
 IDT:
-- 
cgit v1.2.3