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/*
* linux/include/asm-i386/timex.h
*
* i386 architecture timex specifications
*/
#ifndef _ASMi386_TIMEX_H
#define _ASMi386_TIMEX_H
#include <asm/processor.h>
#include <asm/tsc.h>
#ifdef CONFIG_X86_ELAN
# define CLOCK_TICK_RATE 1189200 /* AMD Elan has different frequency! */
#else
# define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
#endif
/*
* Stop RDTSC speculation. This is needed when you need to use RDTSC
* (or get_cycles or vread that possibly accesses the TSC) in a defined
* code region.
*
* (Could use an alternative three way for this if there was one.)
*/
static inline void rdtsc_barrier(void)
{
alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);
alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
}
extern int read_current_timer(unsigned long *timer_value);
#define ARCH_HAS_READ_CURRENT_TIMER 1
#endif