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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Regents of the University of California
*/
#ifndef _ASM_RISCV_TIMEX_H
#define _ASM_RISCV_TIMEX_H
#include <asm/param.h>
typedef unsigned long cycles_t;
static inline cycles_t get_cycles_inline(void)
{
cycles_t n;
__asm__ __volatile__ (
"rdtime %0"
: "=r" (n));
return n;
}
#define get_cycles get_cycles_inline
#ifdef CONFIG_64BIT
static inline uint64_t get_cycles64(void)
{
return get_cycles();
}
#else
static inline uint64_t get_cycles64(void)
{
u32 lo, hi, tmp;
__asm__ __volatile__ (
"1:\n"
"rdtimeh %0\n"
"rdtime %1\n"
"rdtimeh %2\n"
"bne %0, %2, 1b"
: "=&r" (hi), "=&r" (lo), "=&r" (tmp));
return ((u64)hi << 32) | lo;
}
#endif
#define ARCH_HAS_READ_CURRENT_TIMER
static inline int read_current_timer(unsigned long *timer_val)
{
*timer_val = get_cycles();
return 0;
}
#endif /* _ASM_RISCV_TIMEX_H */
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