Created student weenix repository

1 files changed, 40 insertions, 0 deletions

diff --git a/kernel/include/drivers/cmos.h b/kernel/include/drivers/cmos.h
new file mode 100644
index 0000000..bbbc282
--- /dev/null
+++ b/kernel/include/drivers/cmos.h
@@ -0,0 +1,40 @@
+#ifndef CMOS_H
+#define CMOS_H
+
+#include "main/io.h"
+
+// See: https://wiki.osdev.org/CMOS
+#define CMOS_ADDR 0x70
+#define CMOS_DATA 0x71
+
+#define CMOS_REG_SECOND 0x00
+#define CMOS_REG_MINUTE 0x02
+#define CMOS_REG_HOUR 0x04
+#define CMOS_REG_DAY 0x07
+#define CMOS_REG_MONTH 0x08
+#define CMOS_REG_YEAR 0x09
+
+// We're on a modern computer. It'll have a century register.
+#define CMOS_REG_CENTURY 0x32
+#define CMOS_REG_STAT_A 0x0A
+#define CMOS_REG_STAT_B 0x0B
+
+typedef struct rtc_time_t
+{
+    unsigned char second;
+    unsigned char minute;
+    unsigned char hour;
+    unsigned char day;
+    unsigned char month;
+    unsigned int year;
+
+    // Internal use ONLY
+    unsigned int __century;
+} rtc_time_t;
+
+unsigned char cmos_read_register(int reg);
+
+/* Get the time from the CMOS RTC */
+rtc_time_t rtc_get_time();
+
+#endif
\ No newline at end of file