| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Machine dependent access functions for RTC registers. |
| 3 | */ |
| 4 | #ifndef _ASM_MC146818RTC_H |
| 5 | #define _ASM_MC146818RTC_H |
| 6 | |
| 7 | #include <asm/irq.h> |
| 8 | #include <asm/io.h> |
| 9 | |
| 10 | #ifndef RTC_PORT |
| 11 | #define RTC_PORT(x) (0x70 + (x)) |
| 12 | #define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */ |
| 13 | #endif |
| 14 | |
| 15 | /* |
| 16 | * The yet supported machines all access the RTC index register via |
| 17 | * an ISA port access but the way to access the date register differs ... |
| 18 | */ |
| 19 | #define CMOS_READ(addr) ({ \ |
| 20 | outb_p((addr),RTC_PORT(0)); \ |
| 21 | inb_p(RTC_PORT(1)); \ |
| 22 | }) |
| 23 | #define CMOS_WRITE(val, addr) ({ \ |
| 24 | outb_p((addr),RTC_PORT(0)); \ |
| 25 | outb_p((val),RTC_PORT(1)); \ |
| 26 | }) |
| 27 | |
| 28 | #endif /* _ASM_MC146818RTC_H */ |