diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2009-05-13 22:56:34 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe2.(none)> | 2009-06-11 21:02:42 +0200 |
| commit | ae49e807951d5e26767bc55d1dc29671c596c450 (patch) | |
| tree | fca4fedd8797c45b1f30299da49ebf3b5a982ec1 /include/asm-generic/timex.h | |
| parent | aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d (diff) | |
asm-generic: add legacy I/O header files
The dma.h, hw_irq.h, serial.h and timex.h files originally
described PC-style i8237, i8259A, i8250, i8253 and i8255 chips
as well as the VGA style text mode graphics.
Modern architectures live happily without these specific
interfaces, but a few definitions from these headers keep
getting used in common code.
The new generic headers are what most architectures use
anyway nowadays, just implementing the minimal definitions.
Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/timex.h')
| -rw-r--r-- | include/asm-generic/timex.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-generic/timex.h b/include/asm-generic/timex.h new file mode 100644 index 000000000000..b2243cb8d6f6 --- /dev/null +++ b/include/asm-generic/timex.h @@ -0,0 +1,22 @@ +#ifndef __ASM_GENERIC_TIMEX_H +#define __ASM_GENERIC_TIMEX_H + +/* + * If you have a cycle counter, return the value here. + */ +typedef unsigned long cycles_t; +#ifndef get_cycles +static inline cycles_t get_cycles(void) +{ + return 0; +} +#endif + +/* + * Architectures are encouraged to implement read_current_timer + * and define this in order to avoid the expensive delay loop + * calibration during boot. + */ +#undef ARCH_HAS_READ_CURRENT_TIMER + +#endif /* __ASM_GENERIC_TIMEX_H */ |