http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/irq.h

#ifndef __irq_h #define __irq_h /* * Please do not include this file in generic code. There is currently * no requirement for any architecture to implement anything held * within this file. * * Thanks. --rmk */ #include <linux/config.h> #include <linux/smp.h> #if !defined(CONFIG_S390) #include <linux/linkage.h> #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/cpumask.h> #include <asm/irq.h> #include <asm/ptrace.h> /* * IRQ line status. */ #define IRQ_INPROGRESS 1 /* IRQ handler active - do not enter! */ #define IRQ_DISABLED 2 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 4 /* IRQ pending - replay on enable */ #define IRQ_REPLAY 8 /* IRQ has been replayed but not acked yet */ #define IRQ_AUTODETECT 16 /* IRQ is being autodetected */ #define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */ #define IRQ_LEVEL 64 /* IRQ level triggered */ #define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */ #if defined(ARCH_HAS_IRQ_PER_CPU) # define IRQ_PER_CPU 256 /* IRQ is per CPU */ # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) #else # define CHECK_IRQ_PER_CPU(var) 0 #endif /* * Interrupt controller descriptor. This is all we need * to describe about the low-level hardware. */ struct hw_interrupt_type { const char * typename; unsigned int (*startup)(unsigned int irq); void (*shutdown)(unsigned int irq); void (*enable)(unsigned int irq); void (*disable)(unsigned int irq); void (*ack)(unsigned int irq); void (*end)(unsigned int irq); void (*set_affinity)(unsigned int irq, cpumask_t dest); /* Currently used only by UML, might disappear one day.*/ #ifdef CONFIG_IRQ_RELEASE_METHOD void (*release)(unsigned int irq, void *dev_id); #endif }; typedef struct hw_interrupt_type hw_irq_controller; /* * This is the "IRQ descriptor", which contains various information * about the irq, including what kind of hardware handling it has, * whether it is disabled etc etc. * * Pad this out to 32 bytes for cache and indexing reasons. */ typedef struct irq_desc { hw_irq_controller *handler; void *handler_data; struct irqaction *action; /* IRQ action list */ unsigned int status; /* IRQ status */ unsigned int depth; /* nested irq disables */ unsigned int irq_count; /* For detecting broken interrupts */ unsigned int irqs_unhandled; spinlock_t lock; #if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE) unsigned int move_irq; /* Flag need to re-target intr dest*/ #endif } ____cacheline_aligned irq_desc_t; extern irq_desc_t irq_desc [NR_IRQS]; /* Return a pointer to the irq descriptor for IRQ. */ static inline irq_desc_t * irq_descp (int irq) { return irq_desc + irq; } #include <asm/hw_irq.h> /* the arch dependent stuff */ extern int setup_irq(unsigned int irq, struct irqaction * new); #ifdef CONFIG_GENERIC_HARDIRQS extern cpumask_t irq_affinity[NR_IRQS]; #ifdef CONFIG_SMP static inline void set_native_irq_info(int irq, cpumask_t mask) { irq_affinity[irq] = mask; } #else static inline void set_native_irq_info(int irq, cpumask_t mask) { } #endif #ifdef CONFIG_SMP #if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE) extern cpumask_t pending_irq_cpumask[NR_IRQS]; static inline void set_pending_irq(unsigned int irq, cpumask_t mask) { irq_desc_t *desc = irq_desc + irq; unsigned long flags; spin_lock_irqsave(&desc->lock, flags); desc->move_irq = 1; pending_irq_cpumask[irq] = mask; spin_unlock_irqrestore(&desc->lock, flags); } static inline void move_native_irq(int irq) { cpumask_t tmp; irq_desc_t *desc = irq_descp(irq); if (likely (!desc->move_irq)) return; desc->move_irq = 0; if (likely(cpus_empty(pending_irq_cpumask[irq]))) return; if (!desc->handler->set_affinity) return; /* note - we hold the desc->lock */ cpus_and(tmp, pending_irq_cpumask[irq], cpu_online_map); /* * If there was a valid mask to work with, please * do the disable, re-program, enable sequence. * This is *not* particularly important for level triggered * but in a edge trigger case, we might be setting rte * when an active trigger is comming in. This could * cause some ioapics to mal-function. * Being paranoid i guess! */ if (unlikely(!cpus_empty(tmp))) { desc->handler->disable(irq); desc->handler->set_affinity(irq,tmp); desc->handler->enable(irq); } cpus_clear(pending_irq_cpumask[irq]); } #ifdef CONFIG_PCI_MSI /* * Wonder why these are dummies? * For e.g the set_ioapic_affinity_vector() calls the set_ioapic_affinity_irq() * counter part after translating the vector to irq info. We need to perform * this operation on the real irq, when we dont use vector, i.e when * pci_use_vector() is false. */ static inline void move_irq(int irq) { } static inline void set_irq_info(int irq, cpumask_t mask) { } #else // CONFIG_PCI_MSI static inline void move_irq(int irq) { move_native_irq(irq); } static inline void set_irq_info(int irq, cpumask_t mask) { set_native_irq_info(irq, mask); } #endif // CONFIG_PCI_MSI #else // CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE #define move_irq(x) #define move_native_irq(x) #define set_pending_irq(x,y) static inline void set_irq_info(int irq, cpumask_t mask) { set_native_irq_info(irq, mask); } #endif // CONFIG_GENERIC_PENDING_IRQ #else // CONFIG_SMP #define move_irq(x) #define move_native_irq(x) #endif // CONFIG_SMP extern int no_irq_affinity; extern int noirqdebug_setup(char *str); extern fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs, struct irqaction *action); extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs); extern void note_interrupt(unsigned int irq, irq_desc_t *desc, int action_ret, struct pt_regs *regs); extern int can_request_irq(unsigned int irq, unsigned long irqflags); extern void init_irq_proc(void); #ifdef CONFIG_AUTO_IRQ_AFFINITY extern int select_smp_affinity(unsigned int irq); #else static inline int select_smp_affinity(unsigned int irq) { return 1; } #endif #endif extern hw_irq_controller no_irq_type; /* needed in every arch ? */ #endif #endif /* __irq_h */