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/*
* Copyright (c) 2006-2026, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2026-04-27 rcitach init ver.
*/
#ifndef RT_VDSO_ARCH_H
#define RT_VDSO_ARCH_H
#include <stdint.h>
#define __RT_STRINGIFY(x...) #x
#define RT_STRINGIFY(x...) __RT_STRINGIFY(x)
#define rt_vdso_arch_barrier(cmd, ...) \
__asm__ volatile(RT_STRINGIFY(cmd) " " RT_STRINGIFY(__VA_ARGS__)::: "memory")
static inline uint64_t rt_vdso_arch_read_counter(void)
{
uint64_t value;
uint64_t tmp;
__asm__ volatile("mrs %0, CNTVCT_EL0" : "=r"(value));
__asm__ volatile(
"eor %0, %1, %1\n"
"add %0, sp, %0\n"
"ldr xzr, [%0]"
: "=r"(tmp)
: "r"(value));
return value;
}
static inline void rt_vdso_arch_cpu_relax(void)
{
__asm__ volatile("yield" ::: "memory");
}
static inline void rt_vdso_arch_rmb(void)
{
rt_vdso_arch_barrier(dmb, ishld);
}
#endif
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