diff options
Diffstat (limited to 'include/asm-ppc/softirq.h')
-rw-r--r-- | include/asm-ppc/softirq.h | 113 |
1 files changed, 4 insertions, 109 deletions
diff --git a/include/asm-ppc/softirq.h b/include/asm-ppc/softirq.h index 1188809e9..550b46192 100644 --- a/include/asm-ppc/softirq.h +++ b/include/asm-ppc/softirq.h @@ -4,116 +4,11 @@ #include <asm/atomic.h> #include <asm/hardirq.h> -#define get_active_bhs() (bh_mask & bh_active) -#define clear_active_bhs(x) atomic_clear_mask((x),&bh_active) +extern unsigned int local_bh_count[NR_CPUS]; -extern unsigned int ppc_local_bh_count[NR_CPUS]; +#define local_bh_disable() do { local_bh_count[smp_processor_id()]++; barrier(); } while (0) +#define local_bh_enable() do { barrier(); local_bh_count[smp_processor_id()]--; } while (0) -extern inline void init_bh(int nr, void (*routine)(void)) -{ - bh_base[nr] = routine; - atomic_set(&bh_mask_count[nr], 0); - bh_mask |= 1 << nr; -} - -extern inline void remove_bh(int nr) -{ - bh_mask &= ~(1 << nr); - wmb(); - bh_base[nr] = 0; -} - -extern inline void mark_bh(int nr) -{ - set_bit(nr, &bh_active); -} - -#ifdef __SMP__ - -/* - * The locking mechanism for base handlers, to prevent re-entrancy, - * is entirely private to an implementation, it should not be - * referenced at all outside of this file. - */ -extern atomic_t global_bh_lock; -extern atomic_t global_bh_count; - -extern void synchronize_bh(void); - -static inline void start_bh_atomic(void) -{ - atomic_inc(&global_bh_lock); - synchronize_bh(); -} - -static inline void end_bh_atomic(void) -{ - atomic_dec(&global_bh_lock); -} - -/* These are for the IRQs testing the lock */ -static inline int softirq_trylock(int cpu) -{ - if (ppc_local_bh_count[cpu] == 0) { - ppc_local_bh_count[cpu] = 1; - if (!test_and_set_bit(0,&global_bh_count)) { - mb(); - if (atomic_read(&global_bh_lock) == 0) - return 1; - clear_bit(0,&global_bh_count); - } - ppc_local_bh_count[cpu] = 0; - mb(); - } - return 0; -} - -static inline void softirq_endlock(int cpu) -{ - mb(); - ppc_local_bh_count[cpu]--; - clear_bit(0,&global_bh_count); -} - -#else - -extern inline void start_bh_atomic(void) -{ - ppc_local_bh_count[smp_processor_id()]++; - barrier(); -} - -extern inline void end_bh_atomic(void) -{ - barrier(); - ppc_local_bh_count[smp_processor_id()]--; -} - -/* These are for the irq's testing the lock */ -#define softirq_trylock(cpu) (ppc_local_bh_count[cpu] ? 0 : (ppc_local_bh_count[cpu]=1)) -#define softirq_endlock(cpu) (ppc_local_bh_count[cpu] = 0) -#define synchronize_bh() barrier() - -#endif /* SMP */ - -#define local_bh_disable() (ppc_local_bh_count[smp_processor_id()]++) -#define local_bh_enable() (ppc_local_bh_count[smp_processor_id()]--) - -/* - * These use a mask count to correctly handle - * nested disable/enable calls - */ -extern inline void disable_bh(int nr) -{ - bh_mask &= ~(1 << nr); - atomic_inc(&bh_mask_count[nr]); - synchronize_bh(); -} - -extern inline void enable_bh(int nr) -{ - if (atomic_dec_and_test(&bh_mask_count[nr])) - bh_mask |= 1 << nr; -} +#define in_softirq() (local_bh_count[smp_processor_id()] != 0) #endif /* __ASM_SOFTIRQ_H */ |