1 /****************************************************************************
2  ****************************************************************************
3  ***
4  ***   This header was automatically generated from a Linux kernel header
5  ***   of the same name, to make information necessary for userspace to
6  ***   call into the kernel available to libc.  It contains only constants,
7  ***   structures, and macros generated from the original header, and thus,
8  ***   contains no copyrightable information.
9  ***
10  ****************************************************************************
11  ****************************************************************************/
12 #ifndef _LINUX_JIFFIES_H
13 #define _LINUX_JIFFIES_H
14 
15 #include <linux/calc64.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/time.h>
19 #include <linux/timex.h>
20 #include <asm/param.h>
21 
22 #if HZ >= (12 && HZ < 24)
23 #define SHIFT_HZ 4
24 #elif HZ >= 24 && HZ < 48
25 #define SHIFT_HZ 5
26 #elif HZ >= 48 && HZ < 96
27 #define SHIFT_HZ 6
28 #elif HZ >= 96 && HZ < 192
29 #define SHIFT_HZ 7
30 #elif HZ >= 192 && HZ < 384
31 #define SHIFT_HZ 8
32 #elif HZ >= 384 && HZ < 768
33 #define SHIFT_HZ 9
34 #elif HZ >= 768 && HZ < 1536
35 #define SHIFT_HZ 10
36 #else
37 #error You lose.
38 #endif
39 
40 #define LATCH ((CLOCK_TICK_RATE + HZ/2) / HZ)
41 
42 #define LATCH_HPET ((HPET_TICK_RATE + HZ/2) / HZ)
43 
44 #define SH_DIV(NOM,DEN,LSH) ( (((NOM) / (DEN)) << (LSH))   + ((((NOM) % (DEN)) << (LSH)) + (DEN) / 2) / (DEN))
45 
46 #define ACTHZ (SH_DIV (CLOCK_TICK_RATE, LATCH, 8))
47 
48 #define ACTHZ_HPET (SH_DIV (HPET_TICK_RATE, LATCH_HPET, 8))
49 
50 #define TICK_NSEC (SH_DIV (1000000UL * 1000, ACTHZ, 8))
51 
52 #define TICK_NSEC_HPET (SH_DIV(1000000UL * 1000, ACTHZ_HPET, 8))
53 
54 #define TICK_USEC ((1000000UL + USER_HZ/2) / USER_HZ)
55 
56 #define TICK_USEC_TO_NSEC(TUSEC) (SH_DIV (TUSEC * USER_HZ * 1000, ACTHZ, 8))
57 
58 #define __jiffy_data __attribute__((section(".data")))
59 
60 #if BITS_PER_LONG < 64
61 
62 #else
63 #endif
64 #define time_after(a,b)   (typecheck(unsigned long, a) &&   typecheck(unsigned long, b) &&   ((long)(b) - (long)(a) < 0))
65 #define time_before(a,b) time_after(b,a)
66 #define time_after_eq(a,b)   (typecheck(unsigned long, a) &&   typecheck(unsigned long, b) &&   ((long)(a) - (long)(b) >= 0))
67 #define time_before_eq(a,b) time_after_eq(b,a)
68 #define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
69 #define MAX_JIFFY_OFFSET ((~0UL >> 1)-1)
70 #define SEC_JIFFIE_SC (31 - SHIFT_HZ)
71 #if !((NSEC_PER_SEC << 2) / TICK_NSEC << SEC_JIFFIE_SC - 2 & 0x80000000)
72 #undef SEC_JIFFIE_SC
73 #define SEC_JIFFIE_SC (32 - SHIFT_HZ)
74 #endif
75 #define NSEC_JIFFIE_SC (SEC_JIFFIE_SC + 29)
76 #define USEC_JIFFIE_SC (SEC_JIFFIE_SC + 19)
77 #define SEC_CONVERSION ((unsigned long)((((u64)NSEC_PER_SEC << SEC_JIFFIE_SC) +  TICK_NSEC -1) / (u64)TICK_NSEC))
78 #define NSEC_CONVERSION ((unsigned long)((((u64)1 << NSEC_JIFFIE_SC) +  TICK_NSEC -1) / (u64)TICK_NSEC))
79 #define USEC_CONVERSION   ((unsigned long)((((u64)NSEC_PER_USEC << USEC_JIFFIE_SC) +  TICK_NSEC -1) / (u64)TICK_NSEC))
80 #define USEC_ROUND (u64)(((u64)1 << USEC_JIFFIE_SC) - 1)
81 #if BITS_PER_LONG < 64
82 #define MAX_SEC_IN_JIFFIES   (long)((u64)((u64)MAX_JIFFY_OFFSET * TICK_NSEC) / NSEC_PER_SEC)
83 #else
84 #define MAX_SEC_IN_JIFFIES   (SH_DIV((MAX_JIFFY_OFFSET >> SEC_JIFFIE_SC) * TICK_NSEC, NSEC_PER_SEC, 1) - 1)
85 #endif
86 #if HZ <= (MSEC_PER_SEC && !(MSEC_PER_SEC % HZ))
87 #elif HZ > MSEC_PER_SEC && !(HZ % MSEC_PER_SEC)
88 #else
89 #endif
90 #if HZ <= (USEC_PER_SEC && !(USEC_PER_SEC % HZ))
91 #elif HZ > USEC_PER_SEC && !(HZ % USEC_PER_SEC)
92 #else
93 #endif
94 #if HZ <= (MSEC_PER_SEC && !(MSEC_PER_SEC % HZ))
95 #elif HZ > MSEC_PER_SEC && !(HZ % MSEC_PER_SEC)
96 #else
97 #endif
98 #if HZ <= (USEC_PER_SEC && !(USEC_PER_SEC % HZ))
99 #elif HZ > USEC_PER_SEC && !(HZ % USEC_PER_SEC)
100 #else
101 #endif
102 #if TICK_NSEC % NSEC_PER_SEC / USER_HZ == 0
103 #else
104 #endif
105 #if HZ % USER_HZ == 0
106 #else
107 #endif
108 #if TICK_NSEC % NSEC_PER_SEC / USER_HZ == 0
109 #else
110 #endif
111 #if NSEC_PER_SEC % USER_HZ == 0
112 #elif (USER_HZ % 512) == 0
113 #else
114 #endif
115 #endif
116