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Linux/arch/mips/include/asm/mach-dec/mc146818rtc.h

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  1 /*
  2  * RTC definitions for DECstation style attached Dallas DS1287 chip.
  3  *
  4  * Copyright (C) 1998, 2001 by Ralf Baechle
  5  * Copyright (C) 1998 by Harald Koerfgen
  6  * Copyright (C) 2002, 2005  Maciej W. Rozycki
  7  *
  8  * This program is free software; you can redistribute it and/or
  9  * modify it under the terms of the GNU General Public License
 10  * as published by the Free Software Foundation; either version
 11  * 2 of the License, or (at your option) any later version.
 12  */
 13 #ifndef __ASM_MIPS_DEC_RTC_DEC_H
 14 #define __ASM_MIPS_DEC_RTC_DEC_H
 15 
 16 #include <linux/types.h>
 17 #include <asm/addrspace.h>
 18 #include <asm/dec/system.h>
 19 
 20 extern volatile u8 *dec_rtc_base;
 21 
 22 #define ARCH_RTC_LOCATION
 23 
 24 #define RTC_PORT(x)     CPHYSADDR((long)dec_rtc_base)
 25 #define RTC_IO_EXTENT   dec_kn_slot_size
 26 #define RTC_IOMAPPED    0
 27 #undef RTC_IRQ
 28 
 29 #define RTC_DEC_YEAR    0x3f    /* Where we store the real year on DECs.  */
 30 
 31 static inline unsigned char CMOS_READ(unsigned long addr)
 32 {
 33         return dec_rtc_base[addr * 4];
 34 }
 35 
 36 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
 37 {
 38         dec_rtc_base[addr * 4] = data;
 39 }
 40 
 41 #define RTC_ALWAYS_BCD  0
 42 
 43 #endif /* __ASM_MIPS_DEC_RTC_DEC_H */
 44 

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