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ced7814d3a
Adjust time routines for both 32BIT and 64BIT, including: rdtime_h() /
rdtime_l() definitions for 32BIT and rdtime_d() definition for 64BIT,
get_cycles() and get_cycles64() definitions for 32BIT/64BIT, show time
frequency info ("CPU MHz" and "BogoMIPS") in /proc/cpuinfo, etc.
Use do_div() for division which works on both 32BIT and 64BIT platforms.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
58 lines
837 B
C
58 lines
837 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_TIMEX_H
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#define _ASM_TIMEX_H
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <asm/cpu.h>
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#include <asm/cpu-features.h>
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typedef unsigned long cycles_t;
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#define get_cycles get_cycles
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static inline cycles_t get_cycles(void)
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{
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#ifdef CONFIG_32BIT
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return rdtime_l();
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#else
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return rdtime_d();
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#endif
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}
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#ifdef CONFIG_32BIT
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#define get_cycles_hi get_cycles_hi
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static inline cycles_t get_cycles_hi(void)
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{
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return rdtime_h();
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}
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#endif
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static inline u64 get_cycles64(void)
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{
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#ifdef CONFIG_32BIT
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u32 hi, lo;
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do {
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hi = rdtime_h();
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lo = rdtime_l();
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} while (hi != rdtime_h());
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return ((u64)hi << 32) | lo;
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#else
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return rdtime_d();
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#endif
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_TIMEX_H */
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