| /* |
| * include/asm/irqflags.h |
| * |
| * IRQ flags handling |
| * |
| * This file gets included from lowlevel asm headers too, to provide |
| * wrapped versions of the local_irq_*() APIs, based on the |
| * raw_local_irq_*() functions from the lowlevel headers. |
| */ |
| #ifndef _ASM_IRQFLAGS_H |
| #define _ASM_IRQFLAGS_H |
| |
| #include <asm/pil.h> |
| |
| #ifndef __ASSEMBLY__ |
| |
| static inline unsigned long __raw_local_save_flags(void) |
| { |
| unsigned long flags; |
| |
| __asm__ __volatile__( |
| "rdpr %%pil, %0" |
| : "=r" (flags) |
| ); |
| |
| return flags; |
| } |
| |
| #define raw_local_save_flags(flags) \ |
| do { (flags) = __raw_local_save_flags(); } while (0) |
| |
| static inline void raw_local_irq_restore(unsigned long flags) |
| { |
| __asm__ __volatile__( |
| "wrpr %0, %%pil" |
| : /* no output */ |
| : "r" (flags) |
| : "memory" |
| ); |
| } |
| |
| static inline void raw_local_irq_disable(void) |
| { |
| __asm__ __volatile__( |
| "wrpr %0, %%pil" |
| : /* no outputs */ |
| : "i" (PIL_NORMAL_MAX) |
| : "memory" |
| ); |
| } |
| |
| static inline void raw_local_irq_enable(void) |
| { |
| __asm__ __volatile__( |
| "wrpr 0, %%pil" |
| : /* no outputs */ |
| : /* no inputs */ |
| : "memory" |
| ); |
| } |
| |
| static inline int raw_irqs_disabled_flags(unsigned long flags) |
| { |
| return (flags > 0); |
| } |
| |
| static inline int raw_irqs_disabled(void) |
| { |
| unsigned long flags = __raw_local_save_flags(); |
| |
| return raw_irqs_disabled_flags(flags); |
| } |
| |
| /* |
| * For spinlocks, etc: |
| */ |
| static inline unsigned long __raw_local_irq_save(void) |
| { |
| unsigned long flags, tmp; |
| |
| /* Disable interrupts to PIL_NORMAL_MAX unless we already |
| * are using PIL_NMI, in which case PIL_NMI is retained. |
| */ |
| __asm__ __volatile__( |
| "rdpr %%pil, %0\n\t" |
| "or %0, %2, %1\n\t" |
| "wrpr %1, 0x0, %%pil" |
| : "=r" (flags), "=r" (tmp) |
| : "i" (PIL_NORMAL_MAX) |
| : "memory" |
| ); |
| |
| return flags; |
| } |
| |
| #define raw_local_irq_save(flags) \ |
| do { (flags) = __raw_local_irq_save(); } while (0) |
| |
| #endif /* (__ASSEMBLY__) */ |
| |
| #endif /* !(_ASM_IRQFLAGS_H) */ |