LXR linux/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 */
  66extern unsigned long hpet_address;
  67extern unsigned long force_hpet_address;
  68extern int hpet_force_user;
  69extern int is_hpet_enabled(void);
  70extern int hpet_enable(void);
  71extern void hpet_disable(void);
  72extern unsigned long hpet_readl(unsigned long a);
  73extern void force_hpet_resume(void);
  74
  75extern void hpet_msi_unmask(unsigned int irq);
  76extern void hpet_msi_mask(unsigned int irq);
  77extern void hpet_msi_write(unsigned int irq, struct msi_msg *msg);
  78extern void hpet_msi_read(unsigned int irq, struct msi_msg *msg);
  79
  80#ifdef CONFIG_PCI_MSI
  81extern int arch_setup_hpet_msi(unsigned int irq);
  82#else
  83static 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
  93typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie);
  94extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
  95extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
  96extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
  97                               unsigned char sec);
  98extern int hpet_set_periodic_freq(unsigned long freq);
  99extern int hpet_rtc_dropped_irq(void);
 100extern int hpet_rtc_timer_init(void);
 101extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 102extern int hpet_register_irq_handler(rtc_irq_handler handler);
 103extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
 104
 105#endif /* CONFIG_HPET_EMULATE_RTC */
 106
 107#else /* CONFIG_HPET_TIMER */
 108
 109static inline int hpet_enable(void) { return 0; }
 110static inline int is_hpet_enabled(void) { return 0; }
 111#define hpet_readl(a) 0
 112
 113#endif
 114#endif /* _ASM_X86_HPET_H */
 115