/*
* 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 */