u-boot/include/asm-ppc/mc146818rtc.h
2000-11-20 17:21:10 +00:00

27 lines
638 B
C

/*
* Machine dependent access functions for RTC registers.
*/
#ifndef __ASM_PPC_MC146818RTC_H
#define __ASM_PPC_MC146818RTC_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_PPC_MC146818RTC_H */