include/asm-x86_64/mc146818rtc.h

   1 /*
   2  * Machine dependent access functions for RTC registers.
   3  */
   4 #ifndef _ASM_MC146818RTC_H
   5 #define _ASM_MC146818RTC_H
   6
   7 #include <asm/io.h>
   8
   9 #ifndef RTC_PORT
  10 #define RTC_PORT(x)     (0x70 + (x))
  11 #define RTC_ALWAYS_BCD  1       /* RTC operates in binary mode */
  12 #endif
  13
  14 /*
  15  * The yet supported machines all access the RTC index register via
  16  * an ISA port access but the way to access the date register differs ...
  17  */
  18 #define CMOS_READ(addr) ({ \
  19 outb_p((addr),RTC_PORT(0)); \
  20 inb_p(RTC_PORT(1)); \
  21 })
  22 #define CMOS_WRITE(val, addr) ({ \
  23 outb_p((addr),RTC_PORT(0)); \
  24 outb_p((val),RTC_PORT(1)); \
  25 })
  26
  27 #define RTC_IRQ 8
  28
  29 #endif /* _ASM_MC146818RTC_H */