1/* 2 * include/asm-s390/irqflags.h 3 * 4 * Copyright (C) IBM Corp. 2006 5 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> 6 */ 7 8#ifndef __ASM_IRQFLAGS_H 9#define __ASM_IRQFLAGS_H 10 11#ifdef __KERNEL__ 12 13#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) 14 15/* store then or system mask. */ 16#define __raw_local_irq_stosm(__or) \ 17({ \ 18 unsigned long __mask; \ 19 asm volatile( \ 20 " stosm %0,%1" \ 21 : "=Q" (__mask) : "i" (__or) : "memory"); \ 22 __mask; \ 23}) 24 25/* store then and system mask. */ 26#define __raw_local_irq_stnsm(__and) \ 27({ \ 28 unsigned long __mask; \ 29 asm volatile( \ 30 " stnsm %0,%1" \ 31 : "=Q" (__mask) : "i" (__and) : "memory"); \ 32 __mask; \ 33}) 34 35/* set system mask. */ 36#define __raw_local_irq_ssm(__mask) \ 37({ \ 38 asm volatile("ssm %0" : : "Q" (__mask) : "memory"); \ 39}) 40 41#else /* __GNUC__ */ 42 43/* store then or system mask. */ 44#define __raw_local_irq_stosm(__or) \ 45({ \ 46 unsigned long __mask; \ 47 asm volatile( \ 48 " stosm 0(%1),%2" \ 49 : "=m" (__mask) \ 50 : "a" (&__mask), "i" (__or) : "memory"); \ 51 __mask; \ 52}) 53 54/* store then and system mask. */ 55#define __raw_local_irq_stnsm(__and) \ 56({ \ 57 unsigned long __mask; \ 58 asm volatile( \ 59 " stnsm 0(%1),%2" \ 60 : "=m" (__mask) \ 61 : "a" (&__mask), "i" (__and) : "memory"); \ 62 __mask; \ 63}) 64 65/* set system mask. */ 66#define __raw_local_irq_ssm(__mask) \ 67({ \ 68 asm volatile( \ 69 " ssm 0(%0)" \ 70 : : "a" (&__mask), "m" (__mask) : "memory"); \ 71}) 72 73#endif /* __GNUC__ */ 74 75/* interrupt control.. */ 76static inline unsigned long raw_local_irq_enable(void) 77{ 78 return __raw_local_irq_stosm(0x03); 79} 80 81static inline unsigned long raw_local_irq_disable(void) 82{ 83 return __raw_local_irq_stnsm(0xfc); 84} 85 86#define raw_local_save_flags(x) \ 87do { \ 88 typecheck(unsigned long, x); \ 89 (x) = __raw_local_irq_stosm(0x00); \ 90} while (0) 91 92static inline void raw_local_irq_restore(unsigned long flags) 93{ 94 __raw_local_irq_ssm(flags); 95} 96 97static inline int raw_irqs_disabled_flags(unsigned long flags) 98{ 99 return !(flags & (3UL << (BITS_PER_LONG - 8))); 100} 101 102/* For spinlocks etc */ 103#define raw_local_irq_save(x) ((x) = raw_local_irq_disable()) 104 105#endif /* __KERNEL__ */ 106#endif /* __ASM_IRQFLAGS_H */ 107