From 3c4a9533883d628e28c89905fcdbd53842041ef3 Mon Sep 17 00:00:00 2001
From: fslongjin <longjin@RinGoTek.cn>
Date: Wed, 31 Aug 2022 18:04:38 +0800
Subject: [PATCH] =?UTF-8?q?new:=20=E5=A2=9E=E5=8A=A0=E5=AE=9E=E9=AA=8C?=
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---
 kernel/common/glib.c | 25 +++++++++++++++++++++++++
 kernel/common/glib.h |  7 +++++++
 2 files changed, 32 insertions(+)

diff --git a/kernel/common/glib.c b/kernel/common/glib.c
index e5ae7aa3..2e80ec09 100644
--- a/kernel/common/glib.c
+++ b/kernel/common/glib.c
@@ -1,3 +1,28 @@
 #include "glib.h"
 #include "string.h"
 
+/**
+ * @brief 这个函数让蜂鸣器发声，目前仅用于真机调试。未来将移除，请勿依赖此函数。
+ * 
+ * @param times 发声循环多少遍
+ */
+void __experimental_beep(uint64_t times)
+{
+    io_out8(0x43, 182&0xff);
+    io_out8(0x42, 2280&0xff);
+    io_out8(0x42, (2280>>8)&0xff);
+    uint32_t x = io_in8(0x61)&0xff;
+    x |= 3;
+    io_out8(0x61, x&0xff);
+
+    times *= 10000;
+    for(uint64_t i=0;i<times;++i)
+        pause();
+    x = io_in8(0x61);
+    x &= 0xfc;
+    io_out8(0x61, x&0xff);
+
+    // 延迟一段时间
+    for(uint64_t i=0;i<times;++i)
+        pause();
+}
\ No newline at end of file
diff --git a/kernel/common/glib.h b/kernel/common/glib.h
index 4b48b18f..5989745d 100644
--- a/kernel/common/glib.h
+++ b/kernel/common/glib.h
@@ -484,3 +484,10 @@ static inline uint64_t copy_to_user(void *dst, void *src, uint64_t size)
                  : "memory");
     return size;
 }
+
+/**
+ * @brief 这个函数让蜂鸣器发声，目前仅用于真机调试。未来将移除，请勿依赖此函数。
+ * 
+ * @param times 发声循环多少遍
+ */
+void __experimental_beep(uint64_t times);
\ No newline at end of file