diff --git a/libc/kernel/common/linux/mc146818rtc.h b/libc/kernel/common/linux/mc146818rtc.h
new file mode 100644
index 0000000..74436ea
--- /dev/null
+++ b/libc/kernel/common/linux/mc146818rtc.h
@@ -0,0 +1,79 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _MC146818RTC_H
+#define _MC146818RTC_H
+
+#include <asm/io.h>
+#include <linux/rtc.h>  
+#include <asm/mc146818rtc.h>  
+
+#define RTC_SECONDS 0
+#define RTC_SECONDS_ALARM 1
+#define RTC_MINUTES 2
+#define RTC_MINUTES_ALARM 3
+#define RTC_HOURS 4
+#define RTC_HOURS_ALARM 5
+
+#define RTC_ALARM_DONT_CARE 0xC0
+
+#define RTC_DAY_OF_WEEK 6
+#define RTC_DAY_OF_MONTH 7
+#define RTC_MONTH 8
+#define RTC_YEAR 9
+
+#define RTC_REG_A 10
+#define RTC_REG_B 11
+#define RTC_REG_C 12
+#define RTC_REG_D 13
+
+#define RTC_FREQ_SELECT RTC_REG_A
+
+#define RTC_UIP 0x80
+#define RTC_DIV_CTL 0x70
+
+#define RTC_REF_CLCK_4MHZ 0x00
+#define RTC_REF_CLCK_1MHZ 0x10
+#define RTC_REF_CLCK_32KHZ 0x20
+
+#define RTC_DIV_RESET1 0x60
+#define RTC_DIV_RESET2 0x70
+
+#define RTC_RATE_SELECT 0x0F
+
+#define RTC_CONTROL RTC_REG_B
+#define RTC_SET 0x80  
+#define RTC_PIE 0x40  
+#define RTC_AIE 0x20  
+#define RTC_UIE 0x10  
+#define RTC_SQWE 0x08  
+#define RTC_DM_BINARY 0x04  
+#define RTC_24H 0x02  
+#define RTC_DST_EN 0x01  
+
+#define RTC_INTR_FLAGS RTC_REG_C
+
+#define RTC_IRQF 0x80  
+#define RTC_PF 0x40
+#define RTC_AF 0x20
+#define RTC_UF 0x10
+
+#define RTC_VALID RTC_REG_D
+#define RTC_VRT 0x80  
+
+#ifndef ARCH_RTC_LOCATION
+
+#define RTC_IO_EXTENT 0x8
+#define RTC_IOMAPPED 1  
+
+#endif
+
+#endif