mc146818rtc.h

来自「umon bootloader source code, support mip」· C头文件 代码 · 共 42 行

/*
 * RTC definitions for DECstation style attached Dallas DS1287 chip.
 *
 * Copyright (C) 1998, 2001 by Ralf Baechle
 * Copyright (C) 1998 by Harald Koerfgen
 * Copyright (C) 2002, 2005  Maciej W. Rozycki
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#ifndef __ASM_MIPS_DEC_RTC_DEC_H
#define __ASM_MIPS_DEC_RTC_DEC_H

#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/dec/system.h>

extern volatile u8 *dec_rtc_base;

#define RTC_PORT(x)	CPHYSADDR((long)dec_rtc_base)
#define RTC_IO_EXTENT	dec_kn_slot_size
#define RTC_IOMAPPED	0
#undef RTC_IRQ

#define RTC_DEC_YEAR	0x3f	/* Where we store the real year on DECs.  */

static inline unsigned char CMOS_READ(unsigned long addr)
{
	return dec_rtc_base[addr * 4];
}

static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
{
	dec_rtc_base[addr * 4] = data;
}

#define RTC_ALWAYS_BCD	0

#endif /* __ASM_MIPS_DEC_RTC_DEC_H */