arch/x86/include/asm/hpet.h

   1 #ifndef _ASM_X86_HPET_H
   2 #define _ASM_X86_HPET_H
   3
   4 #include <linux/msi.h>
   5
   6 #ifdef CONFIG_HPET_TIMER
   7
   8 #define HPET_MMAP_SIZE          1024
   9
  10 #define HPET_ID                 0x000
  11 #define HPET_PERIOD             0x004
  12 #define HPET_CFG                0x010
  13 #define HPET_STATUS             0x020
  14 #define HPET_COUNTER            0x0f0
  15
  16 #define HPET_Tn_CFG(n)          (0x100 + 0x20 * n)
  17 #define HPET_Tn_CMP(n)          (0x108 + 0x20 * n)
  18 #define HPET_Tn_ROUTE(n)        (0x110 + 0x20 * n)
  19
  20 #define HPET_T0_CFG             0x100
  21 #define HPET_T0_CMP             0x108
  22 #define HPET_T0_ROUTE           0x110
  23 #define HPET_T1_CFG             0x120
  24 #define HPET_T1_CMP             0x128
  25 #define HPET_T1_ROUTE           0x130
  26 #define HPET_T2_CFG             0x140
  27 #define HPET_T2_CMP             0x148
  28 #define HPET_T2_ROUTE           0x150
  29
  30 #define HPET_ID_REV             0x000000ff
  31 #define HPET_ID_NUMBER          0x00001f00
  32 #define HPET_ID_64BIT           0x00002000
  33 #define HPET_ID_LEGSUP          0x00008000
  34 #define HPET_ID_VENDOR          0xffff0000
  35 #define HPET_ID_NUMBER_SHIFT    8
  36 #define HPET_ID_VENDOR_SHIFT    16
  37
  38 #define HPET_ID_VENDOR_8086     0x8086
  39
  40 #define HPET_CFG_ENABLE         0x001
  41 #define HPET_CFG_LEGACY         0x002
  42 #define HPET_LEGACY_8254        2
  43 #define HPET_LEGACY_RTC         8
  44
  45 #define HPET_TN_LEVEL           0x0002
  46 #define HPET_TN_ENABLE          0x0004
  47 #define HPET_TN_PERIODIC        0x0008
  48 #define HPET_TN_PERIODIC_CAP    0x0010
  49 #define HPET_TN_64BIT_CAP       0x0020
  50 #define HPET_TN_SETVAL          0x0040
  51 #define HPET_TN_32BIT           0x0100
  52 #define HPET_TN_ROUTE           0x3e00
  53 #define HPET_TN_FSB             0x4000
  54 #define HPET_TN_FSB_CAP         0x8000
  55 #define HPET_TN_ROUTE_SHIFT     9
  56
  57 /* Max HPET Period is 10^8 femto sec as in HPET spec */
  58 #define HPET_MAX_PERIOD         100000000UL
  59 /*
  60  * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
  61  * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
  62  */
  63 #define HPET_MIN_PERIOD         100000UL
  64
  65 /* hpet memory map physical address */
  66 extern unsigned long hpet_address;
  67 extern unsigned long force_hpet_address;
  68 extern int hpet_force_user;
  69 extern int is_hpet_enabled(void);
  70 extern int hpet_enable(void);
  71 extern void hpet_disable(void);
  72 extern unsigned long hpet_readl(unsigned long a);
  73 extern void force_hpet_resume(void);
  74
  75 extern void hpet_msi_unmask(unsigned int irq);
  76 extern void hpet_msi_mask(unsigned int irq);
  77 extern void hpet_msi_write(unsigned int irq, struct msi_msg *msg);
  78 extern void hpet_msi_read(unsigned int irq, struct msi_msg *msg);
  79
  80 #ifdef CONFIG_PCI_MSI
  81 extern int arch_setup_hpet_msi(unsigned int irq);
  82 #else
  83 static inline int arch_setup_hpet_msi(unsigned int irq)
  84 {
  85         return -EINVAL;
  86 }
  87 #endif
  88
  89 #ifdef CONFIG_HPET_EMULATE_RTC
  90
  91 #include <linux/interrupt.h>
  92
  93 typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie);
  94 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
  95 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
  96 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
  97                                unsigned char sec);
  98 extern int hpet_set_periodic_freq(unsigned long freq);
  99 extern int hpet_rtc_dropped_irq(void);
 100 extern int hpet_rtc_timer_init(void);
 101 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 102 extern int hpet_register_irq_handler(rtc_irq_handler handler);
 103 extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
 104
 105 #endif /* CONFIG_HPET_EMULATE_RTC */
 106
 107 #else /* CONFIG_HPET_TIMER */
 108
 109 static inline int hpet_enable(void) { return 0; }
 110 static inline int is_hpet_enabled(void) { return 0; }
 111 #define hpet_readl(a) 0
 112
 113 #endif
 114 #endif /* _ASM_X86_HPET_H */