1 /* 2 * Copyright IBM Corp. 2006, 2010 3 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 4 */ 5 6 #ifndef __ASM_IRQFLAGS_H 7 #define __ASM_IRQFLAGS_H 8 9 #include <linux/types.h> 10 11 /* store then OR system mask. */ 12 #define __arch_local_irq_stosm(__or) \ 13 ({ \ 14 unsigned long __mask; \ 15 asm volatile( \ 16 " stosm %0,%1" \ 17 : "=Q" (__mask) : "i" (__or) : "memory"); \ 18 __mask; \ 19 }) 20 21 /* store then AND system mask. */ 22 #define __arch_local_irq_stnsm(__and) \ 23 ({ \ 24 unsigned long __mask; \ 25 asm volatile( \ 26 " stnsm %0,%1" \ 27 : "=Q" (__mask) : "i" (__and) : "memory"); \ 28 __mask; \ 29 }) 30 31 /* set system mask. */ 32 static inline notrace void __arch_local_irq_ssm(unsigned long flags) 33 { 34 asm volatile("ssm %0" : : "Q" (flags) : "memory"); 35 } 36 37 static inline notrace unsigned long arch_local_save_flags(void) 38 { 39 return __arch_local_irq_stosm(0x00); 40 } 41 42 static inline notrace unsigned long arch_local_irq_save(void) 43 { 44 return __arch_local_irq_stnsm(0xfc); 45 } 46 47 static inline notrace void arch_local_irq_disable(void) 48 { 49 arch_local_irq_save(); 50 } 51 52 static inline notrace void arch_local_irq_enable(void) 53 { 54 __arch_local_irq_stosm(0x03); 55 } 56 57 static inline notrace void arch_local_irq_restore(unsigned long flags) 58 { 59 __arch_local_irq_ssm(flags); 60 } 61 62 static inline notrace bool arch_irqs_disabled_flags(unsigned long flags) 63 { 64 return !(flags & (3UL << (BITS_PER_LONG - 8))); 65 } 66 67 static inline notrace bool arch_irqs_disabled(void) 68 { 69 return arch_irqs_disabled_flags(arch_local_save_flags()); 70 } 71 72 #endif /* __ASM_IRQFLAGS_H */ 73