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1da177e4 LT |
1 | #ifndef __HPET__ |
2 | #define __HPET__ 1 | |
3 | ||
4 | #include <linux/compiler.h> | |
5 | ||
6 | /* | |
7 | * Offsets into HPET Registers | |
8 | */ | |
9 | ||
10 | struct hpet { | |
11 | u64 hpet_cap; /* capabilities */ | |
12 | u64 res0; /* reserved */ | |
13 | u64 hpet_config; /* configuration */ | |
14 | u64 res1; /* reserved */ | |
15 | u64 hpet_isr; /* interrupt status reg */ | |
16 | u64 res2[25]; /* reserved */ | |
17 | union { /* main counter */ | |
18 | u64 _hpet_mc64; | |
19 | u32 _hpet_mc32; | |
20 | unsigned long _hpet_mc; | |
21 | } _u0; | |
22 | u64 res3; /* reserved */ | |
23 | struct hpet_timer { | |
24 | u64 hpet_config; /* configuration/cap */ | |
25 | union { /* timer compare register */ | |
26 | u64 _hpet_hc64; | |
27 | u32 _hpet_hc32; | |
28 | unsigned long _hpet_compare; | |
29 | } _u1; | |
30 | u64 hpet_fsb[2]; /* FSB route */ | |
31 | } hpet_timers[1]; | |
32 | }; | |
33 | ||
34 | #define hpet_mc _u0._hpet_mc | |
35 | #define hpet_compare _u1._hpet_compare | |
36 | ||
37 | #define HPET_MAX_TIMERS (32) | |
38 | ||
39 | /* | |
40 | * HPET general capabilities register | |
41 | */ | |
42 | ||
43 | #define HPET_COUNTER_CLK_PERIOD_MASK (0xffffffff00000000ULL) | |
44 | #define HPET_COUNTER_CLK_PERIOD_SHIFT (32UL) | |
45 | #define HPET_VENDOR_ID_MASK (0x00000000ffff0000ULL) | |
46 | #define HPET_VENDOR_ID_SHIFT (16ULL) | |
47 | #define HPET_LEG_RT_CAP_MASK (0x8000) | |
48 | #define HPET_COUNTER_SIZE_MASK (0x2000) | |
49 | #define HPET_NUM_TIM_CAP_MASK (0x1f00) | |
50 | #define HPET_NUM_TIM_CAP_SHIFT (8ULL) | |
51 | ||
52 | /* | |
53 | * HPET general configuration register | |
54 | */ | |
55 | ||
56 | #define HPET_LEG_RT_CNF_MASK (2UL) | |
57 | #define HPET_ENABLE_CNF_MASK (1UL) | |
58 | ||
59 | ||
60 | /* | |
61 | * Timer configuration register | |
62 | */ | |
63 | ||
64 | #define Tn_INT_ROUTE_CAP_MASK (0xffffffff00000000ULL) | |
65 | #define Tn_INI_ROUTE_CAP_SHIFT (32UL) | |
66 | #define Tn_FSB_INT_DELCAP_MASK (0x8000UL) | |
67 | #define Tn_FSB_INT_DELCAP_SHIFT (15) | |
68 | #define Tn_FSB_EN_CNF_MASK (0x4000UL) | |
69 | #define Tn_FSB_EN_CNF_SHIFT (14) | |
70 | #define Tn_INT_ROUTE_CNF_MASK (0x3e00UL) | |
71 | #define Tn_INT_ROUTE_CNF_SHIFT (9) | |
72 | #define Tn_32MODE_CNF_MASK (0x0100UL) | |
73 | #define Tn_VAL_SET_CNF_MASK (0x0040UL) | |
74 | #define Tn_SIZE_CAP_MASK (0x0020UL) | |
75 | #define Tn_PER_INT_CAP_MASK (0x0010UL) | |
76 | #define Tn_TYPE_CNF_MASK (0x0008UL) | |
77 | #define Tn_INT_ENB_CNF_MASK (0x0004UL) | |
78 | #define Tn_INT_TYPE_CNF_MASK (0x0002UL) | |
79 | ||
80 | /* | |
81 | * Timer FSB Interrupt Route Register | |
82 | */ | |
83 | ||
84 | #define Tn_FSB_INT_ADDR_MASK (0xffffffff00000000ULL) | |
85 | #define Tn_FSB_INT_ADDR_SHIFT (32UL) | |
86 | #define Tn_FSB_INT_VAL_MASK (0x00000000ffffffffULL) | |
87 | ||
88 | struct hpet_info { | |
89 | unsigned long hi_ireqfreq; /* Hz */ | |
90 | unsigned long hi_flags; /* information */ | |
91 | unsigned short hi_hpet; | |
92 | unsigned short hi_timer; | |
93 | }; | |
94 | ||
95 | #define HPET_INFO_PERIODIC 0x0001 /* timer is periodic */ | |
96 | ||
97 | #define HPET_IE_ON _IO('h', 0x01) /* interrupt on */ | |
98 | #define HPET_IE_OFF _IO('h', 0x02) /* interrupt off */ | |
99 | #define HPET_INFO _IOR('h', 0x03, struct hpet_info) | |
100 | #define HPET_EPI _IO('h', 0x04) /* enable periodic */ | |
101 | #define HPET_DPI _IO('h', 0x05) /* disable periodic */ | |
102 | #define HPET_IRQFREQ _IOW('h', 0x6, unsigned long) /* IRQFREQ usec */ | |
103 | ||
104 | /* | |
105 | * exported interfaces | |
106 | */ | |
107 | ||
108 | struct hpet_task { | |
109 | void (*ht_func) (void *); | |
110 | void *ht_data; | |
111 | void *ht_opaque; | |
112 | }; | |
113 | ||
114 | struct hpet_data { | |
115 | unsigned long hd_phys_address; | |
116 | void __iomem *hd_address; | |
117 | unsigned short hd_nirqs; | |
118 | unsigned short hd_flags; | |
119 | unsigned int hd_state; /* timer allocated */ | |
120 | unsigned int hd_irq[HPET_MAX_TIMERS]; | |
121 | }; | |
122 | ||
123 | #define HPET_DATA_PLATFORM 0x0001 /* platform call to hpet_alloc */ | |
124 | ||
125 | static inline void hpet_reserve_timer(struct hpet_data *hd, int timer) | |
126 | { | |
127 | hd->hd_state |= (1 << timer); | |
128 | return; | |
129 | } | |
130 | ||
131 | int hpet_alloc(struct hpet_data *); | |
132 | int hpet_register(struct hpet_task *, int); | |
133 | int hpet_unregister(struct hpet_task *); | |
134 | int hpet_control(struct hpet_task *, unsigned int, unsigned long); | |
135 | ||
136 | #endif /* !__HPET__ */ |