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#ifndef _I386_HPET_H
#define _I386_HPET_H
#ifdef CONFIG_HPET_TIMER
/*
* 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_MMAP_SIZE 1024
#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_T1_CFG 0x120
#define HPET_T1_CMP 0x128
#define HPET_T1_ROUTE 0x130
#define HPET_T2_CFG 0x140
#define HPET_T2_CMP 0x148
#define HPET_T2_ROUTE 0x150
#define HPET_ID_REV 0x000000ff
#define HPET_ID_NUMBER 0x00001f00
#define HPET_ID_64BIT 0x00002000
#define HPET_ID_LEGSUP 0x00008000
#define HPET_ID_VENDOR 0xffff0000
#define HPET_ID_NUMBER_SHIFT 8
#define HPET_ID_VENDOR_SHIFT 16
#define HPET_ID_VENDOR_8086 0x8086
#define HPET_CFG_ENABLE 0x001
#define HPET_CFG_LEGACY 0x002
#define HPET_LEGACY_8254 2
#define HPET_LEGACY_RTC 8
#define HPET_TN_LEVEL 0x0002
#define HPET_TN_ENABLE 0x0004
#define HPET_TN_PERIODIC 0x0008
#define HPET_TN_PERIODIC_CAP 0x0010
#define HPET_TN_64BIT_CAP 0x0020
#define HPET_TN_SETVAL 0x0040
#define HPET_TN_32BIT 0x0100
#define HPET_TN_ROUTE 0x3e00
#define HPET_TN_FSB 0x4000
#define HPET_TN_FSB_CAP 0x8000
#define HPET_TN_ROUTE_SHIFT 9
/* Max HPET Period is 10^8 femto sec as in HPET spec */
#define HPET_MAX_PERIOD 100000000UL
/*
* Min HPET period is 10^5 femto sec just for safety. If it is less than this,
* then 32 bit HPET counter wrapsaround in less than 0.5 sec.
*/
#define HPET_MIN_PERIOD 100000UL
/* hpet memory map physical address */
extern unsigned long hpet_address;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
#ifdef CONFIG_HPET_EMULATE_RTC
#include <linux/interrupt.h>
extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
unsigned char sec);
extern int hpet_set_periodic_freq(unsigned long freq);
extern int hpet_rtc_dropped_irq(void);
extern int hpet_rtc_timer_init(void);
extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
#endif /* CONFIG_HPET_EMULATE_RTC */
#else
static inline int hpet_enable(void) { return 0; }
#endif /* CONFIG_HPET_TIMER */
#endif /* _I386_HPET_H */
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