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// Definitions for X86 CMOS non-volatile memory access.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#ifndef __CMOS_H
#define __CMOS_H
#include "ioport.h" // inb, outb
#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
#define CMOS_FLOPPY_DRIVE_TYPE 0x10
#define CMOS_EQUIPMENT_INFO 0x14
#define CMOS_BIOS_CONFIG 0x2d
#define CMOS_EXTMEM_LOW 0x30
#define CMOS_EXTMEM_HIGH 0x31
#define CMOS_CENTURY 0x32
#define CMOS_EXTMEM2_LOW 0x34
#define CMOS_EXTMEM2_HIGH 0x35
#define CMOS_BIOS_BOOTFLAG1 0x38
#define CMOS_BIOS_BOOTFLAG2 0x3d
// CMOS_STATUS_B bitdefs
#define CSB_EN_ALARM_IRQ (1<<5)
// CMOS_FLOPPY_DRIVE_TYPE bitdefs
#define CFD_NO_DRIVE 0
#define CFD_360KB 1
#define CFD_12MB 2
#define CFD_720KB 3
#define CFD_144MB 4
#define CFD_288MB 5
static inline u8
inb_cmos(u8 reg)
{
outb(reg, PORT_CMOS_INDEX);
return inb(PORT_CMOS_DATA);
}
static inline void
outb_cmos(u8 val, u8 reg)
{
outb(reg, PORT_CMOS_INDEX);
outb(val, PORT_CMOS_DATA);
}
#endif // cmos.h