diff options
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 117 |
1 files changed, 82 insertions, 35 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index ac1f850d4937..11c99697acfe 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -18,6 +18,69 @@ #include "internals.h" /** + * dynamic_irq_init - initialize a dynamically allocated irq + * @irq: irq number to initialize + */ +void dynamic_irq_init(unsigned int irq) +{ + struct irq_desc *desc; + unsigned long flags; + + if (irq >= NR_IRQS) { + printk(KERN_ERR "Trying to initialize invalid IRQ%d\n", irq); + WARN_ON(1); + return; + } + + /* Ensure we don't have left over values from a previous use of this irq */ + desc = irq_desc + irq; + spin_lock_irqsave(&desc->lock, flags); + desc->status = IRQ_DISABLED; + desc->chip = &no_irq_chip; + desc->handle_irq = handle_bad_irq; + desc->depth = 1; + desc->handler_data = NULL; + desc->chip_data = NULL; + desc->action = NULL; + desc->irq_count = 0; + desc->irqs_unhandled = 0; +#ifdef CONFIG_SMP + desc->affinity = CPU_MASK_ALL; +#endif + spin_unlock_irqrestore(&desc->lock, flags); +} + +/** + * dynamic_irq_cleanup - cleanup a dynamically allocated irq + * @irq: irq number to initialize + */ +void dynamic_irq_cleanup(unsigned int irq) +{ + struct irq_desc *desc; + unsigned long flags; + + if (irq >= NR_IRQS) { + printk(KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq); + WARN_ON(1); + return; + } + + desc = irq_desc + irq; + spin_lock_irqsave(&desc->lock, flags); + if (desc->action) { + spin_unlock_irqrestore(&desc->lock, flags); + printk(KERN_ERR "Destroying IRQ%d without calling free_irq\n", + irq); + WARN_ON(1); + return; + } + desc->handle_irq = handle_bad_irq; + desc->chip = &no_irq_chip; + spin_unlock_irqrestore(&desc->lock, flags); +} + + +/** * set_irq_chip - set the irq chip for an irq * @irq: irq number * @chip: pointer to irq chip description structure @@ -40,10 +103,6 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip) spin_lock_irqsave(&desc->lock, flags); irq_chip_set_defaults(chip); desc->chip = chip; - /* - * For compatibility only: - */ - desc->chip = chip; spin_unlock_irqrestore(&desc->lock, flags); return 0; @@ -146,7 +205,7 @@ static void default_disable(unsigned int irq) struct irq_desc *desc = irq_desc + irq; if (!(desc->status & IRQ_DELAYED_DISABLE)) - irq_desc[irq].chip->mask(irq); + desc->chip->mask(irq); } /* @@ -190,7 +249,6 @@ static inline void mask_ack_irq(struct irq_desc *desc, int irq) * handle_simple_irq - Simple and software-decoded IRQs. * @irq: the interrupt number * @desc: the interrupt description structure for this irq - * @regs: pointer to a register structure * * Simple interrupts are either sent from a demultiplexing interrupt * handler or come from hardware, where no interrupt hardware control @@ -200,7 +258,7 @@ static inline void mask_ack_irq(struct irq_desc *desc, int irq) * unmask issues if necessary. */ void fastcall -handle_simple_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) +handle_simple_irq(unsigned int irq, struct irq_desc *desc) { struct irqaction *action; irqreturn_t action_ret; @@ -220,9 +278,9 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) desc->status |= IRQ_INPROGRESS; spin_unlock(&desc->lock); - action_ret = handle_IRQ_event(irq, regs, action); + action_ret = handle_IRQ_event(irq, action); if (!noirqdebug) - note_interrupt(irq, desc, action_ret, regs); + note_interrupt(irq, desc, action_ret); spin_lock(&desc->lock); desc->status &= ~IRQ_INPROGRESS; @@ -234,7 +292,6 @@ out_unlock: * handle_level_irq - Level type irq handler * @irq: the interrupt number * @desc: the interrupt description structure for this irq - * @regs: pointer to a register structure * * Level type interrupts are active as long as the hardware line has * the active level. This may require to mask the interrupt and unmask @@ -242,7 +299,7 @@ out_unlock: * interrupt line is back to inactive. */ void fastcall -handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) +handle_level_irq(unsigned int irq, struct irq_desc *desc) { unsigned int cpu = smp_processor_id(); struct irqaction *action; @@ -270,9 +327,9 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) desc->status &= ~IRQ_PENDING; spin_unlock(&desc->lock); - action_ret = handle_IRQ_event(irq, regs, action); + action_ret = handle_IRQ_event(irq, action); if (!noirqdebug) - note_interrupt(irq, desc, action_ret, regs); + note_interrupt(irq, desc, action_ret); spin_lock(&desc->lock); desc->status &= ~IRQ_INPROGRESS; @@ -286,7 +343,6 @@ out_unlock: * handle_fasteoi_irq - irq handler for transparent controllers * @irq: the interrupt number * @desc: the interrupt description structure for this irq - * @regs: pointer to a register structure * * Only a single callback will be issued to the chip: an ->eoi() * call when the interrupt has been serviced. This enables support @@ -294,8 +350,7 @@ out_unlock: * details in hardware, transparently. */ void fastcall -handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc, - struct pt_regs *regs) +handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) { unsigned int cpu = smp_processor_id(); struct irqaction *action; @@ -323,9 +378,9 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc, desc->status &= ~IRQ_PENDING; spin_unlock(&desc->lock); - action_ret = handle_IRQ_event(irq, regs, action); + action_ret = handle_IRQ_event(irq, action); if (!noirqdebug) - note_interrupt(irq, desc, action_ret, regs); + note_interrupt(irq, desc, action_ret); spin_lock(&desc->lock); desc->status &= ~IRQ_INPROGRESS; @@ -339,7 +394,6 @@ out: * handle_edge_irq - edge type IRQ handler * @irq: the interrupt number * @desc: the interrupt description structure for this irq - * @regs: pointer to a register structure * * Interrupt occures on the falling and/or rising edge of a hardware * signal. The occurence is latched into the irq controller hardware @@ -353,7 +407,7 @@ out: * loop is left. */ void fastcall -handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) +handle_edge_irq(unsigned int irq, struct irq_desc *desc) { const unsigned int cpu = smp_processor_id(); @@ -404,9 +458,9 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) desc->status &= ~IRQ_PENDING; spin_unlock(&desc->lock); - action_ret = handle_IRQ_event(irq, regs, action); + action_ret = handle_IRQ_event(irq, action); if (!noirqdebug) - note_interrupt(irq, desc, action_ret, regs); + note_interrupt(irq, desc, action_ret); spin_lock(&desc->lock); } while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING); @@ -421,12 +475,11 @@ out_unlock: * handle_percpu_IRQ - Per CPU local irq handler * @irq: the interrupt number * @desc: the interrupt description structure for this irq - * @regs: pointer to a register structure * * Per CPU interrupts on SMP machines without locking requirements */ void fastcall -handle_percpu_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) +handle_percpu_irq(unsigned int irq, struct irq_desc *desc) { irqreturn_t action_ret; @@ -435,9 +488,9 @@ handle_percpu_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) if (desc->chip->ack) desc->chip->ack(irq); - action_ret = handle_IRQ_event(irq, regs, desc->action); + action_ret = handle_IRQ_event(irq, desc->action); if (!noirqdebug) - note_interrupt(irq, desc, action_ret, regs); + note_interrupt(irq, desc, action_ret); if (desc->chip->eoi) desc->chip->eoi(irq); @@ -446,10 +499,7 @@ handle_percpu_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs) #endif /* CONFIG_SMP */ void -__set_irq_handler(unsigned int irq, - void fastcall (*handle)(unsigned int, irq_desc_t *, - struct pt_regs *), - int is_chained) +__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained) { struct irq_desc *desc; unsigned long flags; @@ -502,9 +552,7 @@ __set_irq_handler(unsigned int irq, void set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, - void fastcall (*handle)(unsigned int, - struct irq_desc *, - struct pt_regs *)) + irq_flow_handler_t handle) { set_irq_chip(irq, chip); __set_irq_handler(irq, handle, 0); @@ -515,8 +563,7 @@ set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, * /proc/interrupts output: */ const char * -handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *, - struct pt_regs *)) +handle_irq_name(irq_flow_handler_t handle) { if (handle == handle_level_irq) return "level "; |