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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_Tn_OFFSET  0x20
  18 #define HPET_Tn_CFG(n)   (0x100 + (n) * HPET_Tn_OFFSET)
  19 #define HPET_Tn_ROUTE(n) (0x104 + (n) * HPET_Tn_OFFSET)
  20 #define HPET_Tn_CMP(n)   (0x108 + (n) * HPET_Tn_OFFSET)
  21 #define HPET_T0_CFG     HPET_Tn_CFG(0)
  22 #define HPET_T0_CMP     HPET_Tn_CMP(0)
  23 #define HPET_T1_CFG     HPET_Tn_CFG(1)
  24 #define HPET_T1_CMP     HPET_Tn_CMP(1)
  25
  26 #define HPET_ID_VENDOR  0xffff0000
  27 #define HPET_ID_LEGSUP  0x00008000
  28 #define HPET_ID_64BIT   0x00002000
  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_LEVEL           0x0002
  42 #define HPET_TN_ENABLE          0x0004
  43 #define HPET_TN_PERIODIC        0x0008
  44 #define HPET_TN_PERIODIC_CAP    0x0010
  45 #define HPET_TN_64BIT_CAP       0x0020
  46 #define HPET_TN_SETVAL          0x0040
  47 #define HPET_TN_32BIT           0x0100
  48 #define HPET_TN_ROUTE           0x3e00
  49 #define HPET_TN_FSB             0x4000
  50 #define HPET_TN_FSB_CAP         0x8000
  51
  52 #define HPET_TN_ROUTE_SHIFT     9
  53
  54 #define HPET_TICK_RATE (HZ * 100000UL)
  55
  56 extern int is_hpet_enabled(void);
  57 extern int hpet_rtc_timer_init(void);
  58 extern int hpet_arch_init(void);
  59 extern int hpet_timer_stop_set_go(unsigned long tick);
  60 extern int hpet_reenable(void);
  61 extern unsigned int hpet_calibrate_tsc(void);
  62
  63 extern int hpet_use_timer;
  64 extern unsigned long hpet_address;
  65 extern unsigned long hpet_period;
  66 extern unsigned long hpet_tick;
  67
  68 #ifdef CONFIG_HPET_EMULATE_RTC
  69 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
  70 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
  71 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
  72 extern int hpet_set_periodic_freq(unsigned long freq);
  73 extern int hpet_rtc_dropped_irq(void);
  74 extern int hpet_rtc_timer_init(void);
  75 #endif /* CONFIG_HPET_EMULATE_RTC */
  76
  77 #endif