1 /*
2  * Machine dependent access functions for RTC registers.
3  */
4 #ifndef __ASM_ALPHA_MC146818RTC_H
5 #define __ASM_ALPHA_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 #endif /* __ASM_ALPHA_MC146818RTC_H */
28