/* * 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 */