Viewing file:  irqflags.h (2.28 KB) -rw-r--r--
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/*
* include/asm-s390/irqflags.h
*
* Copyright (C) IBM Corp. 2006
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#ifndef __ASM_IRQFLAGS_H
#define __ASM_IRQFLAGS_H
#ifdef __KERNEL__
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
/* store then or system mask. */
#define __raw_local_irq_stosm(__or) \
({ \
unsigned long __mask; \
asm volatile( \
" stosm %0,%1" \
: "=Q" (__mask) : "i" (__or) : "memory"); \
__mask; \
})
/* store then and system mask. */
#define __raw_local_irq_stnsm(__and) \
({ \
unsigned long __mask; \
asm volatile( \
" stnsm %0,%1" \
: "=Q" (__mask) : "i" (__and) : "memory"); \
__mask; \
})
/* set system mask. */
#define __raw_local_irq_ssm(__mask) \
({ \
asm volatile("ssm %0" : : "Q" (__mask) : "memory"); \
})
#else /* __GNUC__ */
/* store then or system mask. */
#define __raw_local_irq_stosm(__or) \
({ \
unsigned long __mask; \
asm volatile( \
" stosm 0(%1),%2" \
: "=m" (__mask) \
: "a" (&__mask), "i" (__or) : "memory"); \
__mask; \
})
/* store then and system mask. */
#define __raw_local_irq_stnsm(__and) \
({ \
unsigned long __mask; \
asm volatile( \
" stnsm 0(%1),%2" \
: "=m" (__mask) \
: "a" (&__mask), "i" (__and) : "memory"); \
__mask; \
})
/* set system mask. */
#define __raw_local_irq_ssm(__mask) \
({ \
asm volatile( \
" ssm 0(%0)" \
: : "a" (&__mask), "m" (__mask) : "memory"); \
})
#endif /* __GNUC__ */
/* interrupt control.. */
static inline unsigned long raw_local_irq_enable(void)
{
return __raw_local_irq_stosm(0x03);
}
static inline unsigned long raw_local_irq_disable(void)
{
return __raw_local_irq_stnsm(0xfc);
}
#define raw_local_save_flags(x) \
do { \
typecheck(unsigned long, x); \
(x) = __raw_local_irq_stosm(0x00); \
} while (0)
static inline void raw_local_irq_restore(unsigned long flags)
{
__raw_local_irq_ssm(flags);
}
static inline int raw_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (3UL << (BITS_PER_LONG - 8)));
}
/* For spinlocks etc */
#define raw_local_irq_save(x) ((x) = raw_local_irq_disable())
#endif /* __KERNEL__ */
#endif /* __ASM_IRQFLAGS_H */
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