diff options
Diffstat (limited to 'include/asm-mips/hardirq.h')
| -rw-r--r-- | include/asm-mips/hardirq.h | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/include/asm-mips/hardirq.h b/include/asm-mips/hardirq.h index 3896706c7..28340dff3 100644 --- a/include/asm-mips/hardirq.h +++ b/include/asm-mips/hardirq.h @@ -12,6 +12,7 @@ #include <linux/config.h> #include <linux/threads.h> #include <linux/irq.h> +#include <linux/spinlock.h> /* entry.S is sensitive to the offsets of these fields */ typedef struct { @@ -44,7 +45,53 @@ typedef struct { #else -#error No habla MIPS SMP +#include <asm/atomic.h> +#include <linux/spinlock.h> +#include <asm/smp.h> + +extern int global_irq_holder; +extern spinlock_t global_irq_lock; + +static inline int irqs_running (void) +{ + int i; + + for (i = 0; i < smp_num_cpus; i++) + if (local_irq_count(i)) + return 1; + return 0; +} + +static inline void release_irqlock(int cpu) +{ + /* if we didn't own the irq lock, just ignore.. */ + if (global_irq_holder == cpu) { + global_irq_holder = NO_PROC_ID; + spin_unlock(&global_irq_lock); + } +} + +static inline int hardirq_trylock(int cpu) +{ + return !local_irq_count(cpu) && !spin_is_locked(&global_irq_lock); +} + +#define hardirq_endlock(cpu) do { } while (0) + +static inline void irq_enter(int cpu, int irq) +{ + ++local_irq_count(cpu); + + while (spin_is_locked(&global_irq_lock)) + barrier(); +} + +static inline void irq_exit(int cpu, int irq) +{ + --local_irq_count(cpu); +} + +extern void synchronize_irq(void); #endif /* CONFIG_SMP */ #endif /* _ASM_HARDIRQ_H */ |