aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-i386
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/hpet.h126
1 files changed, 48 insertions, 78 deletions
diff --git a/include/asm-i386/hpet.h b/include/asm-i386/hpet.h
index dddeedf504b7..c82dc7ed96b3 100644
--- a/include/asm-i386/hpet.h
+++ b/include/asm-i386/hpet.h
@@ -4,112 +4,82 @@
4 4
5#ifdef CONFIG_HPET_TIMER 5#ifdef CONFIG_HPET_TIMER
6 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
31/* 7/*
32 * Documentation on HPET can be found at: 8 * Documentation on HPET can be found at:
33 * http://www.intel.com/ial/home/sp/pcmmspec.htm 9 * http://www.intel.com/ial/home/sp/pcmmspec.htm
34 * ftp://download.intel.com/ial/home/sp/mmts098.pdf 10 * ftp://download.intel.com/ial/home/sp/mmts098.pdf
35 */ 11 */
36 12
37#define HPET_MMAP_SIZE 1024 13#define HPET_MMAP_SIZE 1024
38 14
39#define HPET_ID 0x000 15#define HPET_ID 0x000
40#define HPET_PERIOD 0x004 16#define HPET_PERIOD 0x004
41#define HPET_CFG 0x010 17#define HPET_CFG 0x010
42#define HPET_STATUS 0x020 18#define HPET_STATUS 0x020
43#define HPET_COUNTER 0x0f0 19#define HPET_COUNTER 0x0f0
44#define HPET_T0_CFG 0x100 20#define HPET_T0_CFG 0x100
45#define HPET_T0_CMP 0x108 21#define HPET_T0_CMP 0x108
46#define HPET_T0_ROUTE 0x110 22#define HPET_T0_ROUTE 0x110
47#define HPET_T1_CFG 0x120 23#define HPET_T1_CFG 0x120
48#define HPET_T1_CMP 0x128 24#define HPET_T1_CMP 0x128
49#define HPET_T1_ROUTE 0x130 25#define HPET_T1_ROUTE 0x130
50#define HPET_T2_CFG 0x140 26#define HPET_T2_CFG 0x140
51#define HPET_T2_CMP 0x148 27#define HPET_T2_CMP 0x148
52#define HPET_T2_ROUTE 0x150 28#define HPET_T2_ROUTE 0x150
53 29
54#define HPET_ID_LEGSUP 0x00008000 30#define HPET_ID_REV 0x000000ff
55#define HPET_ID_NUMBER 0x00001f00 31#define HPET_ID_NUMBER 0x00001f00
56#define HPET_ID_REV 0x000000ff 32#define HPET_ID_64BIT 0x00002000
33#define HPET_ID_LEGSUP 0x00008000
34#define HPET_ID_VENDOR 0xffff0000
57#define HPET_ID_NUMBER_SHIFT 8 35#define HPET_ID_NUMBER_SHIFT 8
36#define HPET_ID_VENDOR_SHIFT 16
58 37
59#define HPET_CFG_ENABLE 0x001 38#define HPET_ID_VENDOR_8086 0x8086
60#define HPET_CFG_LEGACY 0x002 39
40#define HPET_CFG_ENABLE 0x001
41#define HPET_CFG_LEGACY 0x002
61#define HPET_LEGACY_8254 2 42#define HPET_LEGACY_8254 2
62#define HPET_LEGACY_RTC 8 43#define HPET_LEGACY_RTC 8
63 44
64#define HPET_TN_ENABLE 0x004 45#define HPET_TN_LEVEL 0x0002
65#define HPET_TN_PERIODIC 0x008 46#define HPET_TN_ENABLE 0x0004
66#define HPET_TN_PERIODIC_CAP 0x010 47#define HPET_TN_PERIODIC 0x0008
67#define HPET_TN_SETVAL 0x040 48#define HPET_TN_PERIODIC_CAP 0x0010
68#define HPET_TN_32BIT 0x100 49#define HPET_TN_64BIT_CAP 0x0020
69 50#define HPET_TN_SETVAL 0x0040
70/* Use our own asm for 64 bit multiply/divide */ 51#define HPET_TN_32BIT 0x0100
71#define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \ 52#define HPET_TN_ROUTE 0x3e00
72 __asm__ __volatile__("mull %2" \ 53#define HPET_TN_FSB 0x4000
73 :"=a" (eax_out), "=d" (edx_out) \ 54#define HPET_TN_FSB_CAP 0x8000
74 :"r" (reg_in), "0" (eax_in)) 55#define HPET_TN_ROUTE_SHIFT 9
75 56
76#define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \
77 __asm__ __volatile__("divl %2" \
78 :"=a" (eax_out), "=d" (edx_out) \
79 :"r" (reg_in), "0" (eax_in), "1" (edx_in))
80
81#define KERNEL_TICK_USEC (1000000UL/HZ) /* tick value in microsec */
82/* Max HPET Period is 10^8 femto sec as in HPET spec */ 57/* Max HPET Period is 10^8 femto sec as in HPET spec */
83#define HPET_MAX_PERIOD (100000000UL) 58#define HPET_MAX_PERIOD 100000000UL
84/* 59/*
85 * Min HPET period is 10^5 femto sec just for safety. If it is less than this, 60 * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
86 * then 32 bit HPET counter wrapsaround in less than 0.5 sec. 61 * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
87 */ 62 */
88#define HPET_MIN_PERIOD (100000UL) 63#define HPET_MIN_PERIOD 100000UL
89#define HPET_TICK_RATE (HZ * 100000UL)
90 64
91extern unsigned long hpet_address; /* hpet memory map physical address */ 65/* hpet memory map physical address */
66extern unsigned long hpet_address;
92extern int is_hpet_enabled(void); 67extern int is_hpet_enabled(void);
93
94#ifdef CONFIG_X86_64
95extern unsigned long hpet_tick; /* hpet clks count per tick */
96extern int hpet_use_timer;
97extern int hpet_rtc_timer_init(void);
98extern int hpet_enable(void); 68extern int hpet_enable(void);
99extern int is_hpet_capable(void);
100extern int hpet_readl(unsigned long a);
101#else
102extern int hpet_enable(void);
103#endif
104 69
105#ifdef CONFIG_HPET_EMULATE_RTC 70#ifdef CONFIG_HPET_EMULATE_RTC
71
72#include <linux/interrupt.h>
73
106extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask); 74extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
107extern int hpet_set_rtc_irq_bit(unsigned long bit_mask); 75extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
108extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec); 76extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
77 unsigned char sec);
109extern int hpet_set_periodic_freq(unsigned long freq); 78extern int hpet_set_periodic_freq(unsigned long freq);
110extern int hpet_rtc_dropped_irq(void); 79extern int hpet_rtc_dropped_irq(void);
111extern int hpet_rtc_timer_init(void); 80extern int hpet_rtc_timer_init(void);
112extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id); 81extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
82
113#endif /* CONFIG_HPET_EMULATE_RTC */ 83#endif /* CONFIG_HPET_EMULATE_RTC */
114 84
115#else 85#else
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 09:42:40 -0500