Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  S390 version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *    Copyright IBM Corp. 1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  Derived from "include/asm-i386/timex.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *    Copyright (C) 1992, Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #ifndef _ASM_S390_TIMEX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #define _ASM_S390_TIMEX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/preempt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/time64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/lowcore.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) /* The value of the TOD clock for 1.1.1970. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) extern u64 clock_comparator_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /* Inline functions for clock register access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static inline int set_tod_clock(__u64 time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	int cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	asm volatile(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		"   sck   %1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		"   ipm   %0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		"   srl   %0,28\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		: "=d" (cc) : "Q" (time) : "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	return cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static inline int store_tod_clock(__u64 *time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	int cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	asm volatile(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		"   stck  %1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		"   ipm   %0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		"   srl   %0,28\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		: "=d" (cc), "=Q" (*time) : : "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	return cc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static inline void set_clock_comparator(__u64 time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	asm volatile("sckc %0" : : "Q" (time));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) void clock_comparator_work(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) void __init time_early_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) extern unsigned char ptff_function_mask[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* Function codes for the ptff instruction. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #define PTFF_QAF	0x00	/* query available functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #define PTFF_QTO	0x01	/* query tod offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define PTFF_QSI	0x02	/* query steering information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #define PTFF_QUI	0x04	/* query UTC information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #define PTFF_ATO	0x40	/* adjust tod offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #define PTFF_STO	0x41	/* set tod offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define PTFF_SFS	0x42	/* set fine steering rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #define PTFF_SGS	0x43	/* set gross steering rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) /* Query TOD offset result */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) struct ptff_qto {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	unsigned long long physical_clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	unsigned long long tod_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	unsigned long long logical_tod_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned long long tod_epoch_difference;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static inline int ptff_query(unsigned int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	ptr = ptff_function_mask + (nr >> 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return (*ptr & (0x80 >> (nr & 7))) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) /* Query UTC information result */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) struct ptff_qui {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	unsigned int tm : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	unsigned int ts : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	unsigned int : 28;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	unsigned int pad_0x04;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	unsigned long leap_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	short old_leap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	short new_leap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	unsigned int pad_0x14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	unsigned long prt[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	unsigned long cst[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	unsigned int skew;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	unsigned int pad_0x5c[41];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  * ptff - Perform timing facility function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * @ptff_block: Pointer to ptff parameter block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  * @len: Length of parameter block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * @func: Function code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  * Returns: Condition code (0 on success)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define ptff(ptff_block, len, func)					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct addrtype { char _[len]; };				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	register unsigned int reg0 asm("0") = func;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	register unsigned long reg1 asm("1") = (unsigned long) (ptff_block);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int rc;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	asm volatile(							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		"	.word	0x0104\n"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		"	ipm	%0\n"					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		"	srl	%0,28\n"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		: "=d" (rc), "+m" (*(struct addrtype *) reg1)		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		: "d" (reg0), "d" (reg1) : "cc");			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	rc;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static inline unsigned long long local_tick_disable(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	unsigned long long old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	old = S390_lowcore.clock_comparator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	S390_lowcore.clock_comparator = clock_comparator_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	set_clock_comparator(S390_lowcore.clock_comparator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static inline void local_tick_enable(unsigned long long comp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	S390_lowcore.clock_comparator = comp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	set_clock_comparator(S390_lowcore.clock_comparator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define CLOCK_TICK_RATE		1193180 /* Underlying HZ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define STORE_CLOCK_EXT_SIZE	16	/* stcke writes 16 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) typedef unsigned long long cycles_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static inline void get_tod_clock_ext(char *clk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static inline unsigned long long get_tod_clock(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	char clk[STORE_CLOCK_EXT_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	get_tod_clock_ext(clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	return *((unsigned long long *)&clk[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static inline unsigned long long get_tod_clock_fast(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	unsigned long long clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	asm volatile("stckf %0" : "=Q" (clk) : : "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	return clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	return get_tod_clock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static inline cycles_t get_cycles(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return (cycles_t) get_tod_clock() >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) int get_phys_clock(unsigned long *clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) void init_cpu_timer(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) extern unsigned char tod_clock_base[16] __aligned(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  * get_clock_monotonic - returns current time in clock rate units
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * The clock and tod_clock_base get changed via stop_machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  * Therefore preemption must be disabled, otherwise the returned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * value is not guaranteed to be monotonic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static inline unsigned long long get_tod_clock_monotonic(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	unsigned long long tod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	preempt_disable_notrace();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	tod = get_tod_clock() - *(unsigned long long *) &tod_clock_base[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	preempt_enable_notrace();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return tod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)  * tod_to_ns - convert a TOD format value to nanoseconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  * @todval: to be converted TOD format value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)  * Returns: number of nanoseconds that correspond to the TOD format value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * Converting a 64 Bit TOD format value to nanoseconds means that the value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  * must be divided by 4.096. In order to achieve that we multiply with 125
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)  * and divide by 512:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)  *    ns = (todval * 125) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)  * In order to avoid an overflow with the multiplication we can rewrite this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)  * With a split todval == 2^9 * th + tl (th upper 55 bits, tl lower 9 bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)  * we end up with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)  *    ns = ((2^9 * th + tl) * 125 ) >> 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)  * -> ns = (th * 125) + ((tl * 125) >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static inline unsigned long long tod_to_ns(unsigned long long todval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	return ((todval >> 9) * 125) + (((todval & 0x1ff) * 125) >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)  * tod_after - compare two 64 bit TOD values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)  * @a: first 64 bit TOD timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)  * @b: second 64 bit TOD timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)  * Returns: true if a is later than b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static inline int tod_after(unsigned long long a, unsigned long long b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (MACHINE_HAS_SCC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return (long long) a > (long long) b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	return a > b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  * tod_after_eq - compare two 64 bit TOD values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * @a: first 64 bit TOD timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * @b: second 64 bit TOD timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  * Returns: true if a is later than b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static inline int tod_after_eq(unsigned long long a, unsigned long long b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (MACHINE_HAS_SCC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		return (long long) a >= (long long) b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	return a >= b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) #endif