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Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg...
[mirror_ubuntu-bionic-kernel.git] / include / linux / hpet.h
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1#ifndef __HPET__
2#define __HPET__ 1
3
607ca46e 4#include <uapi/linux/hpet.h>
1da177e4 5
878a9f30 6
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7/*
8 * Offsets into HPET Registers
9 */
10
11struct hpet {
12 u64 hpet_cap; /* capabilities */
13 u64 res0; /* reserved */
14 u64 hpet_config; /* configuration */
15 u64 res1; /* reserved */
16 u64 hpet_isr; /* interrupt status reg */
17 u64 res2[25]; /* reserved */
18 union { /* main counter */
19 u64 _hpet_mc64;
20 u32 _hpet_mc32;
21 unsigned long _hpet_mc;
22 } _u0;
23 u64 res3; /* reserved */
24 struct hpet_timer {
25 u64 hpet_config; /* configuration/cap */
26 union { /* timer compare register */
27 u64 _hpet_hc64;
28 u32 _hpet_hc32;
29 unsigned long _hpet_compare;
30 } _u1;
31 u64 hpet_fsb[2]; /* FSB route */
32 } hpet_timers[1];
33};
34
35#define hpet_mc _u0._hpet_mc
36#define hpet_compare _u1._hpet_compare
37
38#define HPET_MAX_TIMERS (32)
70ef6d59 39#define HPET_MAX_IRQ (32)
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40
41/*
42 * HPET general capabilities register
43 */
44
45#define HPET_COUNTER_CLK_PERIOD_MASK (0xffffffff00000000ULL)
46#define HPET_COUNTER_CLK_PERIOD_SHIFT (32UL)
47#define HPET_VENDOR_ID_MASK (0x00000000ffff0000ULL)
48#define HPET_VENDOR_ID_SHIFT (16ULL)
49#define HPET_LEG_RT_CAP_MASK (0x8000)
50#define HPET_COUNTER_SIZE_MASK (0x2000)
51#define HPET_NUM_TIM_CAP_MASK (0x1f00)
52#define HPET_NUM_TIM_CAP_SHIFT (8ULL)
53
54/*
55 * HPET general configuration register
56 */
57
58#define HPET_LEG_RT_CNF_MASK (2UL)
59#define HPET_ENABLE_CNF_MASK (1UL)
60
61
62/*
63 * Timer configuration register
64 */
65
66#define Tn_INT_ROUTE_CAP_MASK (0xffffffff00000000ULL)
70ef6d59 67#define Tn_INT_ROUTE_CAP_SHIFT (32UL)
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68#define Tn_FSB_INT_DELCAP_MASK (0x8000UL)
69#define Tn_FSB_INT_DELCAP_SHIFT (15)
70#define Tn_FSB_EN_CNF_MASK (0x4000UL)
71#define Tn_FSB_EN_CNF_SHIFT (14)
72#define Tn_INT_ROUTE_CNF_MASK (0x3e00UL)
73#define Tn_INT_ROUTE_CNF_SHIFT (9)
74#define Tn_32MODE_CNF_MASK (0x0100UL)
75#define Tn_VAL_SET_CNF_MASK (0x0040UL)
76#define Tn_SIZE_CAP_MASK (0x0020UL)
77#define Tn_PER_INT_CAP_MASK (0x0010UL)
78#define Tn_TYPE_CNF_MASK (0x0008UL)
79#define Tn_INT_ENB_CNF_MASK (0x0004UL)
80#define Tn_INT_TYPE_CNF_MASK (0x0002UL)
81
82/*
83 * Timer FSB Interrupt Route Register
84 */
85
86#define Tn_FSB_INT_ADDR_MASK (0xffffffff00000000ULL)
87#define Tn_FSB_INT_ADDR_SHIFT (32UL)
88#define Tn_FSB_INT_VAL_MASK (0x00000000ffffffffULL)
89
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90/*
91 * exported interfaces
92 */
93
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94struct hpet_data {
95 unsigned long hd_phys_address;
96 void __iomem *hd_address;
97 unsigned short hd_nirqs;
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98 unsigned int hd_state; /* timer allocated */
99 unsigned int hd_irq[HPET_MAX_TIMERS];
100};
101
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102static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
103{
104 hd->hd_state |= (1 << timer);
105 return;
106}
107
108int hpet_alloc(struct hpet_data *);
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109
110#endif /* !__HPET__ */