73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
// Definitions for X86 CMOS non-volatile memory access.
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//
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// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
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//
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// This file may be distributed under the terms of the GNU LGPLv3 license.
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#ifndef __CMOS_H
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#define __CMOS_H
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#define CMOS_RTC_SECONDS 0x00
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#define CMOS_RTC_SECONDS_ALARM 0x01
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#define CMOS_RTC_MINUTES 0x02
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#define CMOS_RTC_MINUTES_ALARM 0x03
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#define CMOS_RTC_HOURS 0x04
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#define CMOS_RTC_HOURS_ALARM 0x05
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#define CMOS_RTC_DAY_WEEK 0x06
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#define CMOS_RTC_DAY_MONTH 0x07
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#define CMOS_RTC_MONTH 0x08
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#define CMOS_RTC_YEAR 0x09
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#define CMOS_STATUS_A 0x0a
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#define CMOS_STATUS_B 0x0b
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#define CMOS_STATUS_C 0x0c
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#define CMOS_STATUS_D 0x0d
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#define CMOS_RESET_CODE 0x0f
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#define CMOS_FLOPPY_DRIVE_TYPE 0x10
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#define CMOS_DISK_DATA 0x12
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#define CMOS_EQUIPMENT_INFO 0x14
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#define CMOS_DISK_DRIVE1_TYPE 0x19
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#define CMOS_DISK_DRIVE2_TYPE 0x1a
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#define CMOS_DISK_DRIVE1_CYL 0x1b
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#define CMOS_DISK_DRIVE2_CYL 0x24
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#define CMOS_MEM_EXTMEM_LOW 0x30
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#define CMOS_MEM_EXTMEM_HIGH 0x31
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#define CMOS_CENTURY 0x32
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#define CMOS_MEM_EXTMEM2_LOW 0x34
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#define CMOS_MEM_EXTMEM2_HIGH 0x35
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#define CMOS_BIOS_BOOTFLAG1 0x38
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#define CMOS_BIOS_DISKTRANSFLAG 0x39
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#define CMOS_BIOS_BOOTFLAG2 0x3d
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#define CMOS_MEM_HIGHMEM_LOW 0x5b
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#define CMOS_MEM_HIGHMEM_MID 0x5c
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#define CMOS_MEM_HIGHMEM_HIGH 0x5d
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#define CMOS_BIOS_SMP_COUNT 0x5f
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// CMOS_FLOPPY_DRIVE_TYPE bitdefs
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#define CFD_NO_DRIVE 0
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#define CFD_360KB 1
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#define CFD_12MB 2
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#define CFD_720KB 3
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#define CFD_144MB 4
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#define CFD_288MB 5
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#ifndef __ASSEMBLY__
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#include "ioport.h" // inb, outb
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static inline u8
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inb_cmos(u8 reg)
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{
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outb(reg, PORT_CMOS_INDEX);
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return inb(PORT_CMOS_DATA);
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}
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static inline void
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outb_cmos(u8 val, u8 reg)
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{
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outb(reg, PORT_CMOS_INDEX);
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outb(val, PORT_CMOS_DATA);
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}
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#endif // !__ASSEMBLY__
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#endif // cmos.h
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