1 /* 2 * include/asm/irqflags.h 3 * 4 * IRQ flags handling 5 * 6 * This file gets included from lowlevel asm headers too, to provide 7 * wrapped versions of the local_irq_*() APIs, based on the 8 * raw_local_irq_*() functions from the lowlevel headers. 9 */ 10 #ifndef _ASM_IRQFLAGS_H 11 #define _ASM_IRQFLAGS_H 12 13 #include <asm/pil.h> 14 15 #ifndef __ASSEMBLY__ 16 __raw_local_save_flags(void)17static inline unsigned long __raw_local_save_flags(void) 18 { 19 unsigned long flags; 20 21 __asm__ __volatile__( 22 "rdpr %%pil, %0" 23 : "=r" (flags) 24 ); 25 26 return flags; 27 } 28 29 #define raw_local_save_flags(flags) \ 30 do { (flags) = __raw_local_save_flags(); } while (0) 31 raw_local_irq_restore(unsigned long flags)32static inline void raw_local_irq_restore(unsigned long flags) 33 { 34 __asm__ __volatile__( 35 "wrpr %0, %%pil" 36 : /* no output */ 37 : "r" (flags) 38 : "memory" 39 ); 40 } 41 raw_local_irq_disable(void)42static inline void raw_local_irq_disable(void) 43 { 44 __asm__ __volatile__( 45 "wrpr %0, %%pil" 46 : /* no outputs */ 47 : "i" (PIL_NORMAL_MAX) 48 : "memory" 49 ); 50 } 51 raw_local_irq_enable(void)52static inline void raw_local_irq_enable(void) 53 { 54 __asm__ __volatile__( 55 "wrpr 0, %%pil" 56 : /* no outputs */ 57 : /* no inputs */ 58 : "memory" 59 ); 60 } 61 raw_irqs_disabled_flags(unsigned long flags)62static inline int raw_irqs_disabled_flags(unsigned long flags) 63 { 64 return (flags > 0); 65 } 66 raw_irqs_disabled(void)67static inline int raw_irqs_disabled(void) 68 { 69 unsigned long flags = __raw_local_save_flags(); 70 71 return raw_irqs_disabled_flags(flags); 72 } 73 74 /* 75 * For spinlocks, etc: 76 */ __raw_local_irq_save(void)77static inline unsigned long __raw_local_irq_save(void) 78 { 79 unsigned long flags = __raw_local_save_flags(); 80 81 raw_local_irq_disable(); 82 83 return flags; 84 } 85 86 #define raw_local_irq_save(flags) \ 87 do { (flags) = __raw_local_irq_save(); } while (0) 88 89 #endif /* (__ASSEMBLY__) */ 90 91 #endif /* !(_ASM_IRQFLAGS_H) */ 92