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   1 #ifndef _ASM_X8664_HPET_H
   2 #define _ASM_X8664_HPET_H 1
   3
   4 /*
   5  * Documentation on HPET can be found at:
   6  *      http://www.intel.com/ial/home/sp/pcmmspec.htm
   7  *      ftp://download.intel.com/ial/home/sp/mmts098.pdf
   8  */
   9
  10 #define HPET_MMAP_SIZE  1024
  11
  12 #define HPET_ID         0x000
  13 #define HPET_PERIOD     0x004
  14 #define HPET_CFG        0x010
  15 #define HPET_STATUS     0x020
  16 #define HPET_COUNTER    0x0f0
  17 #define HPET_T0_CFG     0x100
  18 #define HPET_T0_CMP     0x108
  19 #define HPET_T0_ROUTE   0x110
  20 #define HPET_T1_CFG     0x120
  21 #define HPET_T1_CMP     0x128
  22 #define HPET_T1_ROUTE   0x130
  23 #define HPET_T2_CFG     0x140
  24 #define HPET_T2_CMP     0x148
  25 #define HPET_T2_ROUTE   0x150
  26
  27 #define HPET_ID_VENDOR  0xffff0000
  28 #define HPET_ID_LEGSUP  0x00008000
  29 #define HPET_ID_NUMBER  0x00001f00
  30 #define HPET_ID_REV     0x000000ff
  31 #define HPET_ID_NUMBER_SHIFT    8
  32
  33 #define HPET_ID_VENDOR_SHIFT    16
  34 #define HPET_ID_VENDOR_8086     0x8086
  35
  36 #define HPET_CFG_ENABLE 0x001
  37 #define HPET_CFG_LEGACY 0x002
  38 #define HPET_LEGACY_8254        2
  39 #define HPET_LEGACY_RTC         8
  40
  41 #define HPET_TN_ENABLE          0x004
  42 #define HPET_TN_PERIODIC        0x008
  43 #define HPET_TN_PERIODIC_CAP    0x010
  44 #define HPET_TN_SETVAL          0x040
  45 #define HPET_TN_32BIT           0x100
  46
  47 extern int is_hpet_enabled(void);
  48 extern int hpet_rtc_timer_init(void);
  49 extern int oem_force_hpet_timer(void);
  50
  51 #ifdef CONFIG_HPET_EMULATE_RTC
  52 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
  53 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
  54 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
  55 extern int hpet_set_periodic_freq(unsigned long freq);
  56 extern int hpet_rtc_dropped_irq(void);
  57 extern int hpet_rtc_timer_init(void);
  58 #endif /* CONFIG_HPET_EMULATE_RTC */
  59
  60 #endif