29 lines
641 B
C
29 lines
641 B
C
|
/*
|
||
|
|
* Machine dependent access functions for RTC registers.
|
||
|
|
*/
|
||
|
|
#ifndef _ASM_MC146818RTC_H
|
||
|
|
#define _ASM_MC146818RTC_H
|
||
|
|
|
||
|
|
#include <asm/irq.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#ifndef RTC_PORT
|
||
|
|
#define RTC_PORT(x) (0x70 + (x))
|
||
|
|
#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The yet supported machines all access the RTC index register via
|
||
|
|
* an ISA port access but the way to access the date register differs ...
|
||
|
|
*/
|
||
|
|
#define CMOS_READ(addr) ({ \
|
||
|
|
outb_p((addr),RTC_PORT(0)); \
|
||
|
|
inb_p(RTC_PORT(1)); \
|
||
|
|
})
|
||
|
|
#define CMOS_WRITE(val, addr) ({ \
|
||
|
|
outb_p((addr),RTC_PORT(0)); \
|
||
|
|
outb_p((val),RTC_PORT(1)); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#endif /* _ASM_MC146818RTC_H */
|