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

#include <linux/irqflags.h>

static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
{
        unsigned long flags, retval;

        local_irq_save(flags);
        retval = *m;
        *m = val;
        local_irq_restore(flags);
        return retval;
}

static inline unsigned long xchg_u16(volatile u16 *m, unsigned long val)
{
        unsigned long flags, retval;

        local_irq_save(flags);
        retval = *m;
        *m = val;
        local_irq_restore(flags);
        return retval;
}

static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
{
        unsigned long flags, retval;

        local_irq_save(flags);
        retval = *m;
        *m = val & 0xff;
        local_irq_restore(flags);
        return retval;
}

static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
        unsigned long new)
{
        __u32 retval;
        unsigned long flags;

        local_irq_save(flags);
        retval = *m;
        if (retval == old)
                *m = new;
        local_irq_restore(flags);       /* implies memory barrier  */
        return retval;
}

#endif /* __ASM_SH_CMPXCHG_IRQ_H */