Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
[linux-2.6.git] / include / asm-x86 / hpet.h
1 #ifndef ASM_X86_HPET_H
2 #define ASM_X86_HPET_H
3
4 #ifdef CONFIG_HPET_TIMER
5
6 #define HPET_MMAP_SIZE          1024
7
8 #define HPET_ID                 0x000
9 #define HPET_PERIOD             0x004
10 #define HPET_CFG                0x010
11 #define HPET_STATUS             0x020
12 #define HPET_COUNTER            0x0f0
13 #define HPET_T0_CFG             0x100
14 #define HPET_T0_CMP             0x108
15 #define HPET_T0_ROUTE           0x110
16 #define HPET_T1_CFG             0x120
17 #define HPET_T1_CMP             0x128
18 #define HPET_T1_ROUTE           0x130
19 #define HPET_T2_CFG             0x140
20 #define HPET_T2_CMP             0x148
21 #define HPET_T2_ROUTE           0x150
22
23 #define HPET_ID_REV             0x000000ff
24 #define HPET_ID_NUMBER          0x00001f00
25 #define HPET_ID_64BIT           0x00002000
26 #define HPET_ID_LEGSUP          0x00008000
27 #define HPET_ID_VENDOR          0xffff0000
28 #define HPET_ID_NUMBER_SHIFT    8
29 #define HPET_ID_VENDOR_SHIFT    16
30
31 #define HPET_ID_VENDOR_8086     0x8086
32
33 #define HPET_CFG_ENABLE         0x001
34 #define HPET_CFG_LEGACY         0x002
35 #define HPET_LEGACY_8254        2
36 #define HPET_LEGACY_RTC         8
37
38 #define HPET_TN_LEVEL           0x0002
39 #define HPET_TN_ENABLE          0x0004
40 #define HPET_TN_PERIODIC        0x0008
41 #define HPET_TN_PERIODIC_CAP    0x0010
42 #define HPET_TN_64BIT_CAP       0x0020
43 #define HPET_TN_SETVAL          0x0040
44 #define HPET_TN_32BIT           0x0100
45 #define HPET_TN_ROUTE           0x3e00
46 #define HPET_TN_FSB             0x4000
47 #define HPET_TN_FSB_CAP         0x8000
48 #define HPET_TN_ROUTE_SHIFT     9
49
50 /* Max HPET Period is 10^8 femto sec as in HPET spec */
51 #define HPET_MAX_PERIOD         100000000UL
52 /*
53  * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
54  * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
55  */
56 #define HPET_MIN_PERIOD         100000UL
57
58 /* hpet memory map physical address */
59 extern unsigned long hpet_address;
60 extern unsigned long force_hpet_address;
61 extern int hpet_force_user;
62 extern int is_hpet_enabled(void);
63 extern int hpet_enable(void);
64 extern unsigned long hpet_readl(unsigned long a);
65 extern void force_hpet_resume(void);
66
67 #ifdef CONFIG_HPET_EMULATE_RTC
68
69 #include <linux/interrupt.h>
70
71 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
72 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
73 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
74                                unsigned char sec);
75 extern int hpet_set_periodic_freq(unsigned long freq);
76 extern int hpet_rtc_dropped_irq(void);
77 extern int hpet_rtc_timer_init(void);
78 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
79
80 #endif /* CONFIG_HPET_EMULATE_RTC */
81
82 #else
83
84 static inline int hpet_enable(void) { return 0; }
85 static inline unsigned long hpet_readl(unsigned long a) { return 0; }
86
87 #endif /* CONFIG_HPET_TIMER */
88 #endif /* ASM_X86_HPET_H */