[linux-2.6-block.git] / include / linux / acpi_pmtmr.h

#ifndef _ACPI_PMTMR_H_
#define _ACPI_PMTMR_H_

#include <linux/clocksource.h>

/* Number of PMTMR ticks expected during calibration run */
#define PMTMR_TICKS_PER_SEC 3579545

/* limit it to 24 bits */
#define ACPI_PM_MASK CLOCKSOURCE_MASK(24)

/* Overrun value */
#define ACPI_PM_OVRRUN	(1<<24)

#ifdef CONFIG_X86_PM_TIMER

extern u32 acpi_pm_read_verified(void);
extern u32 pmtmr_ioport;

static inline u32 acpi_pm_read_early(void)
{
	if (!pmtmr_ioport)
		return 0;
	/* mask the output to 24 bits */
	return acpi_pm_read_verified() & ACPI_PM_MASK;
}

extern void pmtimer_wait(unsigned);

#else

static inline u32 acpi_pm_read_early(void)
{
	return 0;
}

#endif

#endif
Commit	Line	Data
d66bea57 TG	1	#ifndef _ACPI_PMTMR_H_
	2	#define _ACPI_PMTMR_H_
	3
	4	#include <linux/clocksource.h>
	5
	6	/* Number of PMTMR ticks expected during calibration run */
	7	#define PMTMR_TICKS_PER_SEC 3579545
	8
	9	/* limit it to 24 bits */
	10	#define ACPI_PM_MASK CLOCKSOURCE_MASK(24)
	11
	12	/* Overrun value */
	13	#define ACPI_PM_OVRRUN (1<<24)
	14
	15	#ifdef CONFIG_X86_PM_TIMER
	16
	17	extern u32 acpi_pm_read_verified(void);
	18	extern u32 pmtmr_ioport;
	19
	20	static inline u32 acpi_pm_read_early(void)
	21	{
	22	if (!pmtmr_ioport)
	23	return 0;
	24	/* mask the output to 24 bits */
	25	return acpi_pm_read_verified() & ACPI_PM_MASK;
	26	}
	27
70a20025 TG	28	extern void pmtimer_wait(unsigned);
70a20025 TG	29
d66bea57 TG	30	#else
	31
	32	static inline u32 acpi_pm_read_early(void)
	33	{
	34	return 0;
	35	}
	36
	37	#endif
	38
	39	#endif
	40