irqflags.h

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/*
 *    Copyright IBM Corp. 2006, 2010
 *    Author(s): Martin Schwidefsky <[email protected]>
 */

#ifndef __ASM_IRQFLAGS_H
#define __ASM_IRQFLAGS_H

#include <linux/types.h>

/* store then OR system mask. */
#define __arch_local_irq_stosm(__or)                    \
({                                  \
    unsigned long __mask;                       \
    asm volatile(                           \
        "   stosm   %0,%1"                  \
        : "=Q" (__mask) : "i" (__or) : "memory");       \
    __mask;                             \
})

/* store then AND system mask. */
#define __arch_local_irq_stnsm(__and)                   \
({                                  \
    unsigned long __mask;                       \
    asm volatile(                           \
        "   stnsm   %0,%1"                  \
        : "=Q" (__mask) : "i" (__and) : "memory");      \
    __mask;                             \
})

/* set system mask. */
static inline notrace void __arch_local_irq_ssm(unsigned long flags)
{
    asm volatile("ssm   %0" : : "Q" (flags) : "memory");
}

static inline notrace unsigned long arch_local_save_flags(void)
{
    return __arch_local_irq_stosm(0x00);
}

static inline notrace unsigned long arch_local_irq_save(void)
{
    return __arch_local_irq_stnsm(0xfc);
}

static inline notrace void arch_local_irq_disable(void)
{
    arch_local_irq_save();
}

static inline notrace void arch_local_irq_enable(void)
{
    __arch_local_irq_stosm(0x03);
}

static inline notrace void arch_local_irq_restore(unsigned long flags)
{
    __arch_local_irq_ssm(flags);
}

static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
{
    return !(flags & (3UL << (BITS_PER_LONG - 8)));
}

static inline notrace bool arch_irqs_disabled(void)
{
    return arch_irqs_disabled_flags(arch_local_save_flags());
}

#endif /* __ASM_IRQFLAGS_H */