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b8ce3359 TG |
1 | #ifndef ASM_X86_HPET_H |
2 | #define ASM_X86_HPET_H | |
3 | ||
4 | #ifdef CONFIG_HPET_TIMER | |
5 | ||
6 | /* | |
7 | * Documentation on HPET can be found at: | |
8 | * http://www.intel.com/ial/home/sp/pcmmspec.htm | |
9 | * ftp://download.intel.com/ial/home/sp/mmts098.pdf | |
10 | */ | |
11 | ||
12 | #define HPET_MMAP_SIZE 1024 | |
13 | ||
14 | #define HPET_ID 0x000 | |
15 | #define HPET_PERIOD 0x004 | |
16 | #define HPET_CFG 0x010 | |
17 | #define HPET_STATUS 0x020 | |
18 | #define HPET_COUNTER 0x0f0 | |
19 | #define HPET_T0_CFG 0x100 | |
20 | #define HPET_T0_CMP 0x108 | |
21 | #define HPET_T0_ROUTE 0x110 | |
22 | #define HPET_T1_CFG 0x120 | |
23 | #define HPET_T1_CMP 0x128 | |
24 | #define HPET_T1_ROUTE 0x130 | |
25 | #define HPET_T2_CFG 0x140 | |
26 | #define HPET_T2_CMP 0x148 | |
27 | #define HPET_T2_ROUTE 0x150 | |
28 | ||
29 | #define HPET_ID_REV 0x000000ff | |
30 | #define HPET_ID_NUMBER 0x00001f00 | |
31 | #define HPET_ID_64BIT 0x00002000 | |
32 | #define HPET_ID_LEGSUP 0x00008000 | |
33 | #define HPET_ID_VENDOR 0xffff0000 | |
34 | #define HPET_ID_NUMBER_SHIFT 8 | |
35 | #define HPET_ID_VENDOR_SHIFT 16 | |
36 | ||
37 | #define HPET_ID_VENDOR_8086 0x8086 | |
38 | ||
39 | #define HPET_CFG_ENABLE 0x001 | |
40 | #define HPET_CFG_LEGACY 0x002 | |
41 | #define HPET_LEGACY_8254 2 | |
42 | #define HPET_LEGACY_RTC 8 | |
43 | ||
44 | #define HPET_TN_LEVEL 0x0002 | |
45 | #define HPET_TN_ENABLE 0x0004 | |
46 | #define HPET_TN_PERIODIC 0x0008 | |
47 | #define HPET_TN_PERIODIC_CAP 0x0010 | |
48 | #define HPET_TN_64BIT_CAP 0x0020 | |
49 | #define HPET_TN_SETVAL 0x0040 | |
50 | #define HPET_TN_32BIT 0x0100 | |
51 | #define HPET_TN_ROUTE 0x3e00 | |
52 | #define HPET_TN_FSB 0x4000 | |
53 | #define HPET_TN_FSB_CAP 0x8000 | |
54 | #define HPET_TN_ROUTE_SHIFT 9 | |
55 | ||
56 | /* Max HPET Period is 10^8 femto sec as in HPET spec */ | |
57 | #define HPET_MAX_PERIOD 100000000UL | |
58 | /* | |
59 | * Min HPET period is 10^5 femto sec just for safety. If it is less than this, | |
60 | * then 32 bit HPET counter wrapsaround in less than 0.5 sec. | |
61 | */ | |
62 | #define HPET_MIN_PERIOD 100000UL | |
63 | ||
64 | /* hpet memory map physical address */ | |
65 | extern unsigned long hpet_address; | |
66 | extern int is_hpet_enabled(void); | |
67 | extern int hpet_enable(void); | |
31c435d7 | 68 | extern unsigned long hpet_readl(unsigned long a); |
b8ce3359 TG |
69 | |
70 | #ifdef CONFIG_HPET_EMULATE_RTC | |
71 | ||
72 | #include <linux/interrupt.h> | |
73 | ||
74 | extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); | |
75 | extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); | |
76 | extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, | |
77 | unsigned char sec); | |
78 | extern int hpet_set_periodic_freq(unsigned long freq); | |
79 | extern int hpet_rtc_dropped_irq(void); | |
80 | extern int hpet_rtc_timer_init(void); | |
81 | extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); | |
82 | ||
83 | #endif /* CONFIG_HPET_EMULATE_RTC */ | |
84 | ||
96a388de | 85 | #else |
b8ce3359 TG |
86 | |
87 | static inline int hpet_enable(void) { return 0; } | |
31c435d7 | 88 | static inline unsigned long hpet_readl(unsigned long a) { return 0; } |
b8ce3359 TG |
89 | |
90 | #endif /* CONFIG_HPET_TIMER */ | |
91 | #endif /* ASM_X86_HPET_H */ |