tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_X8664_HPET_H
2#define _ASM_X8664_HPET_H 1
3
4/*
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
8 */
9
10#define HPET_MMAP_SIZE 1024
11
12#define HPET_ID 0x000
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)
25
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
32
33#define HPET_ID_VENDOR_SHIFT 16
34#define HPET_ID_VENDOR_8086 0x8086
35
36#define HPET_CFG_ENABLE 0x001
37#define HPET_CFG_LEGACY 0x002
38#define HPET_LEGACY_8254 2
39#define HPET_LEGACY_RTC 8
40
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
51
52#define HPET_TN_ROUTE_SHIFT 9
53
54extern int is_hpet_enabled(void);
55extern int hpet_rtc_timer_init(void);
56extern int oem_force_hpet_timer(void);
57
58#ifdef CONFIG_HPET_EMULATE_RTC
59extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
60extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
61extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
62extern int hpet_set_periodic_freq(unsigned long freq);
63extern int hpet_rtc_dropped_irq(void);
64extern int hpet_rtc_timer_init(void);
65#endif /* CONFIG_HPET_EMULATE_RTC */
66
67#endif