From: acevest <zhaoyanbai@126.com>
Date: Fri, 2 Jan 2026 14:01:22 +0000 (+0800)
Subject: 把8253/8254的时钟中断路由到CPU 0的0号中断
X-Git-Url: http://repos.zhaoyanbai.com/Mou_128.png?a=commitdiff_plain;h=7105a2e104f2107b10bbd9b75814279810ab96f8;p=kernel.git

把8253/8254的时钟中断路由到CPU 0的0号中断
---

diff --git a/kernel/apic.c b/kernel/apic.c
index 90b13d2..7e7c050 100644
--- a/kernel/apic.c
+++ b/kernel/apic.c
@@ -302,9 +302,13 @@ void ioapic_init() {
     // TODO
     // iounmap(rcba_virt_base);
 
-    // 打开键盘中断
-    ioapic_rte_write(IOAPIC_RTE(1), 0x21);
     extern irq_chip_t ioapic_chip;
+    // 把8253的中断通过IOAPIC转发到CPU0的0号中断
+    // 8253/8254连在i8259的0号引脚，但连在IO APIC的2号引脚上
+    ioapic_rte_write(IOAPIC_RTE(2), 0x20 + 0);
+    // 把键盘中断通过IOAPIC转发到CPU0的1号中断
+    ioapic_rte_write(IOAPIC_RTE(1), 0x20 + 1);
+    irq_set_chip(0x00, &ioapic_chip);
     irq_set_chip(0x01, &ioapic_chip);
 }