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1da177e4 LT |
1 | |
2 | #ifndef _I386_HPET_H | |
3 | #define _I386_HPET_H | |
4 | ||
5 | #ifdef CONFIG_HPET_TIMER | |
6 | ||
7 | #include <linux/errno.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/sched.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/param.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/time.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/smp.h> | |
19 | ||
20 | #include <asm/io.h> | |
21 | #include <asm/smp.h> | |
22 | #include <asm/irq.h> | |
23 | #include <asm/msr.h> | |
24 | #include <asm/delay.h> | |
25 | #include <asm/mpspec.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/processor.h> | |
28 | ||
29 | #include <linux/timex.h> | |
30 | #include <linux/config.h> | |
31 | ||
32 | #include <asm/fixmap.h> | |
33 | ||
34 | /* | |
35 | * Documentation on HPET can be found at: | |
36 | * http://www.intel.com/ial/home/sp/pcmmspec.htm | |
37 | * ftp://download.intel.com/ial/home/sp/mmts098.pdf | |
38 | */ | |
39 | ||
40 | #define HPET_MMAP_SIZE 1024 | |
41 | ||
42 | #define HPET_ID 0x000 | |
43 | #define HPET_PERIOD 0x004 | |
44 | #define HPET_CFG 0x010 | |
45 | #define HPET_STATUS 0x020 | |
46 | #define HPET_COUNTER 0x0f0 | |
47 | #define HPET_T0_CFG 0x100 | |
48 | #define HPET_T0_CMP 0x108 | |
49 | #define HPET_T0_ROUTE 0x110 | |
50 | #define HPET_T1_CFG 0x120 | |
51 | #define HPET_T1_CMP 0x128 | |
52 | #define HPET_T1_ROUTE 0x130 | |
53 | #define HPET_T2_CFG 0x140 | |
54 | #define HPET_T2_CMP 0x148 | |
55 | #define HPET_T2_ROUTE 0x150 | |
56 | ||
57 | #define HPET_ID_LEGSUP 0x00008000 | |
58 | #define HPET_ID_NUMBER 0x00001f00 | |
59 | #define HPET_ID_REV 0x000000ff | |
60 | #define HPET_ID_NUMBER_SHIFT 8 | |
61 | ||
62 | #define HPET_CFG_ENABLE 0x001 | |
63 | #define HPET_CFG_LEGACY 0x002 | |
64 | #define HPET_LEGACY_8254 2 | |
65 | #define HPET_LEGACY_RTC 8 | |
66 | ||
67 | #define HPET_TN_ENABLE 0x004 | |
68 | #define HPET_TN_PERIODIC 0x008 | |
69 | #define HPET_TN_PERIODIC_CAP 0x010 | |
70 | #define HPET_TN_SETVAL 0x040 | |
71 | #define HPET_TN_32BIT 0x100 | |
72 | ||
73 | /* Use our own asm for 64 bit multiply/divide */ | |
74 | #define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \ | |
75 | __asm__ __volatile__("mull %2" \ | |
76 | :"=a" (eax_out), "=d" (edx_out) \ | |
77 | :"r" (reg_in), "0" (eax_in)) | |
78 | ||
79 | #define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \ | |
80 | __asm__ __volatile__("divl %2" \ | |
81 | :"=a" (eax_out), "=d" (edx_out) \ | |
82 | :"r" (reg_in), "0" (eax_in), "1" (edx_in)) | |
83 | ||
84 | #define KERNEL_TICK_USEC (1000000UL/HZ) /* tick value in microsec */ | |
85 | /* Max HPET Period is 10^8 femto sec as in HPET spec */ | |
86 | #define HPET_MAX_PERIOD (100000000UL) | |
87 | /* | |
88 | * Min HPET period is 10^5 femto sec just for safety. If it is less than this, | |
89 | * then 32 bit HPET counter wrapsaround in less than 0.5 sec. | |
90 | */ | |
91 | #define HPET_MIN_PERIOD (100000UL) | |
92 | ||
93 | extern unsigned long hpet_tick; /* hpet clks count per tick */ | |
94 | extern unsigned long hpet_address; /* hpet memory map physical address */ | |
35492df5 | 95 | extern int hpet_use_timer; |
1da177e4 LT |
96 | |
97 | extern int hpet_rtc_timer_init(void); | |
98 | extern int hpet_enable(void); | |
99 | extern int hpet_reenable(void); | |
100 | extern int is_hpet_enabled(void); | |
101 | extern int is_hpet_capable(void); | |
102 | extern int hpet_readl(unsigned long a); | |
103 | ||
104 | #ifdef CONFIG_HPET_EMULATE_RTC | |
105 | extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); | |
106 | extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); | |
107 | extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec); | |
108 | extern int hpet_set_periodic_freq(unsigned long freq); | |
109 | extern int hpet_rtc_dropped_irq(void); | |
110 | extern int hpet_rtc_timer_init(void); | |
111 | extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
112 | #endif /* CONFIG_HPET_EMULATE_RTC */ | |
113 | #endif /* CONFIG_HPET_TIMER */ | |
114 | #endif /* _I386_HPET_H */ |