/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __ASM_VDSO_PROCESSOR_H
#define __ASM_VDSO_PROCESSOR_H

#ifndef __ASSEMBLER__

#include <asm-generic/barrier.h>

static inline void cpu_relax(void)
{
#ifdef __riscv_muldiv
        int dummy;
        /* In lieu of a halt instruction, induce a long-latency stall. */
        __asm__ __volatile__ ("div %0, %0, zero" : "=r" (dummy));
#endif

#ifdef CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE
        /*
         * Reduce instruction retirement.
         * This assumes the PC changes.
         */
        __asm__ __volatile__ ("pause");
#else
        /* Encoding of the pause instruction */
        __asm__ __volatile__ (".4byte 0x100000F");
#endif
        barrier();
}

#endif /* __ASSEMBLER__ */

#endif /* __ASM_VDSO_PROCESSOR_H */