From 9ff53aa1fafba2dd2e8cc1e3dbabc14de91cc815 Mon Sep 17 00:00:00 2001
From: TermiNexus <wyt18222152539wyt@163.com>
Date: Wed, 26 Aug 2026 18:32:21 +0800
Subject: [PATCH] =?UTF-8?q?debug(apic):=20=E8=AF=BB=E5=9B=9E=20LINT0=20?=
 =?UTF-8?q?=E4=B8=8E=20APIC=20BASE=20MSR=EF=BC=8C=E9=AA=8C=E8=AF=81=20EXTI?=
 =?UTF-8?q?NT=20=E9=85=8D=E7=BD=AE=E6=98=AF=E5=90=A6=E7=94=9F=E6=95=88?=
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PIT 正常（cnt=1109）但中断不送达。读回验证：
- lint0=0x700 → EXTINT 未屏蔽（正确）；0x10700 → 被屏蔽；其它 → 写入失败
- apic_base_msr bit11 → APIC 使能状态
用后移除。
---
 VKernel/Kernel/main.vp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/VKernel/Kernel/main.vp b/VKernel/Kernel/main.vp
index 7d17b4e..42681d7 100644
--- a/VKernel/Kernel/main.vp
+++ b/VKernel/Kernel/main.vp
@@ -78,6 +78,14 @@ class ViperKernel:
         apic.early_init()
         serial.puts("[main] apic init done\n")
 
+        # [DBG] 读回 LAPIC LINT0 与 APIC BASE MSR，验证 EXTINT 配置（用后移除）
+        _lint0: t.CUInt32T = apic.read(0x350)
+        _apic_msr: t.CUInt64T = cpu.msr_read(apic.IA32_APIC_BASE)
+        _abuf: t.CArray[t.CChar, 96]
+        viperlib.snprintf(c.Addr(_abuf), 96, "[APIC] lint0=0x%x apic_base_msr=0x%lx\n",
+                          _lint0, _apic_msr)
+        serial.puts(c.Addr(_abuf))
+
         asm.sti()
         serial.puts("[main] sti done\n")