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/*

 * linux/include/asm-x8664/timex.h

 *

 * x8664 architecture timex specifications

 */

#ifndef _ASMx8664_TIMEX_H

#define _ASMx8664_TIMEX_H

#include <linux/config.h>

#include <asm/msr.h>

#include <asm/vsyscall.h>

#define CLOCK_TICK_RATE (vxtime_hz)

#define FINETUNE        ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \

                        1000000 / CLOCK_TICK_RATE) << (SHIFT_SCALE - SHIFT_HZ)) / HZ)

/*

 * 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;

extern cycles_t cacheflush_time;

static inline cycles_t get_cycles (void)

{

        unsigned long long ret;

        rdtscll(ret);

        return ret;

}

extern unsigned int cpu_khz;

/*

 * Documentation on HPET can be found at:

 *      http://www.intel.com/ial/home/sp/pcmmspec.htm

 *      ftp://download.intel.com/ial/home/sp/mmts098.pdf

 */

#define HPET_ID         0x000

#define HPET_PERIOD     0x004

#define HPET_CFG        0x010

#define HPET_STATUS     0x020

#define HPET_COUNTER    0x0f0

#define HPET_T0_CFG     0x100

#define HPET_T0_CMP     0x108

#define HPET_T0_ROUTE   0x110

#define HPET_ID_VENDOR  0xffff0000

#define HPET_ID_LEGSUP  0x00008000

#define HPET_ID_NUMBER  0x00000f00

#define HPET_ID_REV     0x000000ff

#define HPET_CFG_ENABLE 0x001

#define HPET_CFG_LEGACY 0x002

#define HPET_T0_ENABLE          0x004

#define HPET_T0_PERIODIC        0x008

#define HPET_T0_SETVAL          0x040

#define HPET_T0_32BIT           0x100

extern struct vxtime_data vxtime;

extern unsigned long vxtime_hz;

extern unsigned long hpet_address;

#endif