1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_X86_HPET_H |
3 | #define _ASM_X86_HPET_H |
4 | |
5 | #include <linux/msi.h> |
6 | |
7 | #ifdef CONFIG_HPET_TIMER |
8 | |
9 | #define HPET_MMAP_SIZE 1024 |
10 | |
11 | #define HPET_ID 0x000 |
12 | #define HPET_PERIOD 0x004 |
13 | #define HPET_CFG 0x010 |
14 | #define HPET_STATUS 0x020 |
15 | #define HPET_COUNTER 0x0f0 |
16 | |
17 | #define HPET_Tn_CFG(n) (0x100 + 0x20 * n) |
18 | #define HPET_Tn_CMP(n) (0x108 + 0x20 * n) |
19 | #define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n) |
20 | |
21 | #define HPET_T0_CFG 0x100 |
22 | #define HPET_T0_CMP 0x108 |
23 | #define HPET_T0_ROUTE 0x110 |
24 | #define HPET_T1_CFG 0x120 |
25 | #define HPET_T1_CMP 0x128 |
26 | #define HPET_T1_ROUTE 0x130 |
27 | #define HPET_T2_CFG 0x140 |
28 | #define HPET_T2_CMP 0x148 |
29 | #define HPET_T2_ROUTE 0x150 |
30 | |
31 | #define HPET_ID_REV 0x000000ff |
32 | #define HPET_ID_NUMBER 0x00001f00 |
33 | #define HPET_ID_64BIT 0x00002000 |
34 | #define HPET_ID_LEGSUP 0x00008000 |
35 | #define HPET_ID_VENDOR 0xffff0000 |
36 | #define HPET_ID_NUMBER_SHIFT 8 |
37 | #define HPET_ID_VENDOR_SHIFT 16 |
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 unsigned long force_hpet_address; |
67 | extern bool boot_hpet_disable; |
68 | extern u8 hpet_blockid; |
69 | extern bool hpet_force_user; |
70 | extern bool hpet_msi_disable; |
71 | extern int is_hpet_enabled(void); |
72 | extern int hpet_enable(void); |
73 | extern void hpet_disable(void); |
74 | extern unsigned int hpet_readl(unsigned int a); |
75 | extern void force_hpet_resume(void); |
76 | |
77 | #ifdef CONFIG_HPET_EMULATE_RTC |
78 | |
79 | #include <linux/interrupt.h> |
80 | |
81 | typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); |
82 | extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); |
83 | extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); |
84 | extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, |
85 | unsigned char sec); |
86 | extern int hpet_set_periodic_freq(unsigned long freq); |
87 | extern int hpet_rtc_dropped_irq(void); |
88 | extern int hpet_rtc_timer_init(void); |
89 | extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); |
90 | extern int hpet_register_irq_handler(rtc_irq_handler handler); |
91 | extern void hpet_unregister_irq_handler(rtc_irq_handler handler); |
92 | |
93 | #endif /* CONFIG_HPET_EMULATE_RTC */ |
94 | |
95 | #else /* CONFIG_HPET_TIMER */ |
96 | |
97 | static inline int hpet_enable(void) { return 0; } |
98 | static inline int is_hpet_enabled(void) { return 0; } |
99 | #define hpet_readl(a) 0 |
100 | #define default_setup_hpet_msi NULL |
101 | |
102 | #endif |
103 | #endif /* _ASM_X86_HPET_H */ |
104 | |