a3a255e744
x86_64's cpu_khz is unsigned int and there is no reason why x86 needs to use unsigned long. So make cpu_khz unsigned int on x86 as well. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
|
|
* linux/include/asm-i386/timex.h
|
|
*
|
|
* i386 architecture timex specifications
|
|
*/
|
|
#ifndef _ASMi386_TIMEX_H
|
|
#define _ASMi386_TIMEX_H
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/processor.h>
|
|
|
|
#ifdef CONFIG_X86_ELAN
|
|
# define CLOCK_TICK_RATE 1189200 /* AMD Elan has different frequency! */
|
|
#else
|
|
# define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Standard way to access the cycle counter on i586+ CPUs.
|
|
* Currently only used on SMP.
|
|
*
|
|
* If you really have a SMP machine with i486 chips or older,
|
|
* compile for that, and this will just always return zero.
|
|
* That's ok, it just means that the nicer scheduling heuristics
|
|
* won't work for you.
|
|
*
|
|
* We only use the low 32 bits, and we'd simply better make sure
|
|
* that we reschedule before that wraps. Scheduling at least every
|
|
* four billion cycles just basically sounds like a good idea,
|
|
* regardless of how fast the machine is.
|
|
*/
|
|
typedef unsigned long long cycles_t;
|
|
|
|
static inline cycles_t get_cycles (void)
|
|
{
|
|
unsigned long long ret=0;
|
|
|
|
#ifndef CONFIG_X86_TSC
|
|
if (!cpu_has_tsc)
|
|
return 0;
|
|
#endif
|
|
|
|
#if defined(CONFIG_X86_GENERIC) || defined(CONFIG_X86_TSC)
|
|
rdtscll(ret);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
extern unsigned int cpu_khz;
|
|
|
|
extern int read_current_timer(unsigned long *timer_value);
|
|
#define ARCH_HAS_READ_CURRENT_TIMER 1
|
|
|
|
#endif
|