From ae49e807951d5e26767bc55d1dc29671c596c450 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 13 May 2009 22:56:34 +0000 Subject: 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 Signed-off-by: Arnd Bergmann --- include/asm-generic/timex.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 include/asm-generic/timex.h (limited to 'include/asm-generic/timex.h') 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 */ -- cgit v1.2.3-70-g09d2