1 #ifndef _ASM_X8664_HPET_H
2 #define _ASM_X8664_HPET_H 1
5 * Documentation on HPET can be found at:
6 * http://www.intel.com/ial/home/sp/pcmmspec.htm
7 * ftp://download.intel.com/ial/home/sp/mmts098.pdf
10 #define HPET_MMAP_SIZE 1024
13 #define HPET_PERIOD 0x004
14 #define HPET_CFG 0x010
15 #define HPET_STATUS 0x020
16 #define HPET_COUNTER 0x0f0
17 #define HPET_Tn_OFFSET 0x20
18 #define HPET_Tn_CFG(n) (0x100 + (n) * HPET_Tn_OFFSET)
19 #define HPET_Tn_ROUTE(n) (0x104 + (n) * HPET_Tn_OFFSET)
20 #define HPET_Tn_CMP(n) (0x108 + (n) * HPET_Tn_OFFSET)
21 #define HPET_T0_CFG HPET_Tn_CFG(0)
22 #define HPET_T0_CMP HPET_Tn_CMP(0)
23 #define HPET_T1_CFG HPET_Tn_CFG(1)
24 #define HPET_T1_CMP HPET_Tn_CMP(1)
26 #define HPET_ID_VENDOR 0xffff0000
27 #define HPET_ID_LEGSUP 0x00008000
28 #define HPET_ID_64BIT 0x00002000
29 #define HPET_ID_NUMBER 0x00001f00
30 #define HPET_ID_REV 0x000000ff
31 #define HPET_ID_NUMBER_SHIFT 8
33 #define HPET_ID_VENDOR_SHIFT 16
34 #define HPET_ID_VENDOR_8086 0x8086
36 #define HPET_CFG_ENABLE 0x001
37 #define HPET_CFG_LEGACY 0x002
38 #define HPET_LEGACY_8254 2
39 #define HPET_LEGACY_RTC 8
41 #define HPET_TN_LEVEL 0x0002
42 #define HPET_TN_ENABLE 0x0004
43 #define HPET_TN_PERIODIC 0x0008
44 #define HPET_TN_PERIODIC_CAP 0x0010
45 #define HPET_TN_64BIT_CAP 0x0020
46 #define HPET_TN_SETVAL 0x0040
47 #define HPET_TN_32BIT 0x0100
48 #define HPET_TN_ROUTE 0x3e00
49 #define HPET_TN_FSB 0x4000
50 #define HPET_TN_FSB_CAP 0x8000
52 #define HPET_TN_ROUTE_SHIFT 9
54 #define HPET_TICK_RATE (HZ * 100000UL)
56 extern int is_hpet_enabled(void);
57 extern int hpet_rtc_timer_init(void);
58 extern int apic_is_clustered_box(void);
60 extern int hpet_use_timer
;
62 #ifdef CONFIG_HPET_EMULATE_RTC
63 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask
);
64 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask
);
65 extern int hpet_set_alarm_time(unsigned char hrs
, unsigned char min
, unsigned char sec
);
66 extern int hpet_set_periodic_freq(unsigned long freq
);
67 extern int hpet_rtc_dropped_irq(void);
68 extern int hpet_rtc_timer_init(void);
69 #endif /* CONFIG_HPET_EMULATE_RTC */