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5a2b89b0a4
Generalize and split basic cpu cycle/tick routines from x86/timer: - Instead of rdstc(), use cpu_ticks() in generic code. - Instead of get_tsc_khz(), use cpu_tickrate() in generic code. - Include "common/ticks.h" instead of "x86/timer.h" in generic code. - CYCLES_PER_MS is renamed to TICKS_PER_MS. The x86 specific API rdstc() and get_tsc_khz(), as well as TSC_PER_MS are still available in arch/x86/tsc.h but only for x86 specific usage. Tracked-On: #5920 Signed-off-by: Rong Liu <rong2.liu@intel.com> Signed-off-by: Yi Liang <yi.liang@intel.com>
42 lines
688 B
C
42 lines
688 B
C
/*
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* Copyright (C) 2021 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef ARCH_X86_TSC_H
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#define ARCH_X86_TSC_H
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#include <types.h>
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#define TSC_PER_MS ((uint64_t)get_tsc_khz())
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/**
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* @brief Read Time Stamp Counter (TSC).
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*
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* @return TSC value
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*/
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static inline uint64_t rdtsc(void)
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{
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uint32_t lo, hi;
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asm volatile("rdtsc" : "=a" (lo), "=d" (hi));
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return ((uint64_t)hi << 32U) | lo;
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}
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/**
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* @brief Get Time Stamp Counter (TSC) frequency in KHz.
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*
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* @return TSC frequency in KHz
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*/
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uint32_t get_tsc_khz(void);
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/**
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* @brief Calibrate Time Stamp Counter (TSC) frequency.
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*
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* @return None
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*/
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void calibrate_tsc(void);
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#endif /* ARCH_X86_TSC_H */
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