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

#ifndef __ASSEMBLY__

/* Macros for adjusting thread priority (hardware multi-threading) */
#ifdef CONFIG_PPC64
#define HMT_very_low()        asm volatile("or 31, 31, 31    # very low priority")
#define HMT_low()        asm volatile("or 1, 1, 1    # low priority")
#define HMT_medium_low()    asm volatile("or 6, 6, 6    # medium low priority")
#define HMT_medium()        asm volatile("or 2, 2, 2    # medium priority")
#define HMT_medium_high()    asm volatile("or 5, 5, 5    # medium high priority")
#define HMT_high()        asm volatile("or 3, 3, 3    # high priority")
#else
#define HMT_very_low()
#define HMT_low()
#define HMT_medium_low()
#define HMT_medium()
#define HMT_medium_high()
#define HMT_high()
#endif

#ifdef CONFIG_PPC64
#define cpu_relax()                            \
    asm volatile(ASM_FTR_IFCLR(                    \
        /* Pre-POWER10 uses low ; medium priority nops */    \
        "or 1,1,1 ; or 2,2,2",                    \
        /* POWER10 onward uses pause_short (wait 2,0) */    \
        PPC_WAIT(2, 0),                        \
        %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
#else
#define cpu_relax()    barrier()
#endif

#endif /* __ASSEMBLY__ */

#endif /* _ASM_POWERPC_VDSO_PROCESSOR_H */