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