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#ifndef __RTC_H
#define __RTC_H
#define PORT_CMOS_INDEX 0x0070
#define PORT_CMOS_DATA 0x0071
// PORT_CMOS_INDEX nmi disable bit
#define NMI_DISABLE_BIT 0x80
// Standard BIOS RTC chip entries
#define CMOS_RTC_SECONDS 0x00
#define CMOS_RTC_SECONDS_ALARM 0x01
#define CMOS_RTC_MINUTES 0x02
#define CMOS_RTC_MINUTES_ALARM 0x03
#define CMOS_RTC_HOURS 0x04
#define CMOS_RTC_HOURS_ALARM 0x05
#define CMOS_RTC_DAY_WEEK 0x06
#define CMOS_RTC_DAY_MONTH 0x07
#define CMOS_RTC_MONTH 0x08
#define CMOS_RTC_YEAR 0x09
#define CMOS_STATUS_A 0x0a
#define CMOS_STATUS_B 0x0b
#define CMOS_STATUS_C 0x0c
#define CMOS_STATUS_D 0x0d
#define CMOS_RESET_CODE 0x0f
// QEMU cmos config fields. DO NOT ADD MORE. (All new content should
// be passed via the fw_cfg "file" interface.)
#define CMOS_FLOPPY_DRIVE_TYPE 0x10
#define CMOS_DISK_DATA 0x12
#define CMOS_EQUIPMENT_INFO 0x14
#define CMOS_DISK_DRIVE1_TYPE 0x19
#define CMOS_DISK_DRIVE2_TYPE 0x1a
#define CMOS_DISK_DRIVE1_CYL 0x1b
#define CMOS_DISK_DRIVE2_CYL 0x24
#define CMOS_MEM_EXTMEM_LOW 0x30
#define CMOS_MEM_EXTMEM_HIGH 0x31
#define CMOS_CENTURY 0x32
#define CMOS_MEM_EXTMEM2_LOW 0x34
#define CMOS_MEM_EXTMEM2_HIGH 0x35
#define CMOS_BIOS_BOOTFLAG1 0x38
#define CMOS_BIOS_DISKTRANSFLAG 0x39
#define CMOS_BIOS_BOOTFLAG2 0x3d
#define CMOS_MEM_HIGHMEM_LOW 0x5b
#define CMOS_MEM_HIGHMEM_MID 0x5c
#define CMOS_MEM_HIGHMEM_HIGH 0x5d
#define CMOS_BIOS_SMP_COUNT 0x5f
// RTC register flags
#define RTC_A_UIP 0x80
#define RTC_B_SET 0x80
#define RTC_B_PIE 0x40
#define RTC_B_AIE 0x20
#define RTC_B_UIE 0x10
#define RTC_B_BIN 0x04
#define RTC_B_24HR 0x02
#define RTC_B_DSE 0x01
#ifndef __ASSEMBLY__
#include "types.h" // u8
// rtc.c
u8 rtc_read(u8 index);
void rtc_write(u8 index, u8 val);
void rtc_mask(u8 index, u8 off, u8 on);
int rtc_updating(void);
void rtc_setup(void);
void rtc_use(void);
void rtc_release(void);
#endif // !__ASSEMBLY__
#endif // rtc.h
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