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- #ifndef _LINUX_IRQ_H
- #define _LINUX_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/smp.h>
- #ifndef CONFIG_S390
- #include <linux/linkage.h>
- #include <linux/cache.h>
- #include <linux/spinlock.h>
- #include <linux/cpumask.h>
- #include <linux/irqreturn.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 */
- #ifdef CONFIG_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);
- int (*retrigger)(unsigned int irq);
- /* 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;
- struct proc_dir_entry;
- /*
- * 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.
- */
- struct irq_desc {
- hw_irq_controller *chip;
- void *chip_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 IRQs */
- unsigned int irqs_unhandled;
- spinlock_t lock;
- #ifdef CONFIG_SMP
- cpumask_t affinity;
- #endif
- #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
- cpumask_t pending_mask;
- unsigned int move_irq; /* need to re-target IRQ dest */
- #endif
- #ifdef CONFIG_PROC_FS
- struct proc_dir_entry *dir;
- #endif
- } ____cacheline_aligned;
- extern struct irq_desc irq_desc[NR_IRQS];
- /*
- * Migration helpers for obsolete names, they will go away:
- */
- typedef struct irq_desc irq_desc_t;
- /*
- * Pick up the arch-dependent methods:
- */
- #include <asm/hw_irq.h>
- extern int setup_irq(unsigned int irq, struct irqaction *new);
- #ifdef CONFIG_GENERIC_HARDIRQS
- #ifdef CONFIG_SMP
- static inline void set_native_irq_info(int irq, cpumask_t mask)
- {
- irq_desc[irq].affinity = 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)
- void set_pending_irq(unsigned int irq, cpumask_t mask);
- void move_native_irq(int 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 */
- static inline void move_irq(int irq)
- {
- }
- static inline void move_native_irq(int irq)
- {
- }
- static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
- {
- }
- 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 */
- #ifdef CONFIG_IRQBALANCE
- extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
- #else
- static inline void set_balance_irq_affinity(unsigned int irq, cpumask_t mask)
- {
- }
- #endif
- #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
- extern int no_irq_affinity;
- extern int noirqdebug_setup(char *str);
- extern irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
- struct irqaction *action);
- /*
- * Explicit fastcall, because i386 4KSTACKS calls it from assembly:
- */
- extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
- extern void note_interrupt(unsigned int irq, struct irq_desc *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);
- #endif /* CONFIG_GENERIC_HARDIRQS */
- extern hw_irq_controller no_irq_type; /* needed in every arch ? */
- #endif /* !CONFIG_S390 */
- #endif /* _LINUX_IRQ_H */
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