summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--arch/arm/Kconfig12
-rw-r--r--arch/arm/kernel/fiq.c1
-rw-r--r--arch/arm/kernel/irq.c951
-rw-r--r--include/asm-arm/dyntick.h6
-rw-r--r--include/asm-arm/hw_irq.h9
-rw-r--r--include/asm-arm/irq.h22
-rw-r--r--include/asm-arm/mach/irq.h135
7 files changed, 93 insertions, 1043 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f123c7c9fc98..531661ac01b4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -47,6 +47,18 @@ config MCA
<file:Documentation/mca.txt> (and especially the web page given
there) before attempting to build an MCA bus kernel.
+config GENERIC_HARDIRQS
+ bool
+ default y
+
+config HARDIRQS_SW_RESEND
+ bool
+ default y
+
+config GENERIC_IRQ_PROBE
+ bool
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
default y
diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c
index 1ec3f7faa259..e8e90346f11c 100644
--- a/arch/arm/kernel/fiq.c
+++ b/arch/arm/kernel/fiq.c
@@ -38,6 +38,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/seq_file.h>
#include <asm/cacheflush.h>
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 4d31cf8d02d5..c3d4e94ef5bf 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -26,6 +26,7 @@
#include <linux/signal.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/random.h>
@@ -37,192 +38,18 @@
#include <linux/kallsyms.h>
#include <linux/proc_fs.h>
-#include <asm/irq.h>
#include <asm/system.h>
-#include <asm/mach/irq.h>
#include <asm/mach/time.h>
/*
- * Maximum IRQ count. Currently, this is arbitary. However, it should
- * not be set too low to prevent false triggering. Conversely, if it
- * is set too high, then you could miss a stuck IRQ.
- *
- * Maybe we ought to set a timer and re-enable the IRQ at a later time?
- */
-#define MAX_IRQ_CNT 100000
-
-static int noirqdebug __read_mostly;
-static volatile unsigned long irq_err_count;
-static DEFINE_SPINLOCK(irq_controller_lock);
-static LIST_HEAD(irq_pending);
-
-struct irqdesc irq_desc[NR_IRQS];
-void (*init_arch_irq)(void) __initdata = NULL;
-
-/*
* No architecture-specific irq_finish function defined in arm/arch/irqs.h.
*/
#ifndef irq_finish
#define irq_finish(irq) do { } while (0)
#endif
-/*
- * Dummy mask/unmask handler
- */
-void dummy_mask_unmask_irq(unsigned int irq)
-{
-}
-
-irqreturn_t no_action(int irq, void *dev_id, struct pt_regs *regs)
-{
- return IRQ_NONE;
-}
-
-void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
- irq_err_count++;
- printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
-}
-
-static struct irqchip bad_chip = {
- .ack = dummy_mask_unmask_irq,
- .mask = dummy_mask_unmask_irq,
- .unmask = dummy_mask_unmask_irq,
-};
-
-static struct irqdesc bad_irq_desc = {
- .chip = &bad_chip,
- .handle = do_bad_IRQ,
- .pend = LIST_HEAD_INIT(bad_irq_desc.pend),
- .disable_depth = 1,
-};
-
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
-
- while (desc->running)
- barrier();
-}
-EXPORT_SYMBOL(synchronize_irq);
-
-#define smp_set_running(desc) do { desc->running = 1; } while (0)
-#define smp_clear_running(desc) do { desc->running = 0; } while (0)
-#else
-#define smp_set_running(desc) do { } while (0)
-#define smp_clear_running(desc) do { } while (0)
-#endif
-
-/**
- * disable_irq_nosync - disable an irq without waiting
- * @irq: Interrupt to disable
- *
- * Disable the selected interrupt line. Enables and disables
- * are nested. We do this lazily.
- *
- * This function may be called from IRQ context.
- */
-void disable_irq_nosync(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- desc->disable_depth++;
- list_del_init(&desc->pend);
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(disable_irq_nosync);
-
-/**
- * disable_irq - disable an irq and wait for completion
- * @irq: Interrupt to disable
- *
- * Disable the selected interrupt line. Enables and disables
- * are nested. This functions waits for any pending IRQ
- * handlers for this interrupt to complete before returning.
- * If you use this function while holding a resource the IRQ
- * handler may need you will deadlock.
- *
- * This function may be called - with care - from IRQ context.
- */
-void disable_irq(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
-
- disable_irq_nosync(irq);
- if (desc->action)
- synchronize_irq(irq);
-}
-EXPORT_SYMBOL(disable_irq);
-
-/**
- * enable_irq - enable interrupt handling on an irq
- * @irq: Interrupt to enable
- *
- * Re-enables the processing of interrupts on this IRQ line.
- * Note that this may call the interrupt handler, so you may
- * get unexpected results if you hold IRQs disabled.
- *
- * This function may be called from IRQ context.
- */
-void enable_irq(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- if (unlikely(!desc->disable_depth)) {
- printk("enable_irq(%u) unbalanced from %p\n", irq,
- __builtin_return_address(0));
- } else if (!--desc->disable_depth) {
- desc->probing = 0;
- desc->chip->unmask(irq);
-
- /*
- * If the interrupt is waiting to be processed,
- * try to re-run it. We can't directly run it
- * from here since the caller might be in an
- * interrupt-protected region.
- */
- if (desc->pending && list_empty(&desc->pend)) {
- desc->pending = 0;
- if (!desc->chip->retrigger ||
- desc->chip->retrigger(irq))
- list_add(&desc->pend, &irq_pending);
- }
- }
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(enable_irq);
-
-/*
- * Enable wake on selected irq
- */
-void enable_irq_wake(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- if (desc->chip->set_wake)
- desc->chip->set_wake(irq, 1);
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(enable_irq_wake);
-
-void disable_irq_wake(unsigned int irq)
-{
- struct irqdesc *desc = irq_desc + irq;
- unsigned long flags;
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- if (desc->chip->set_wake)
- desc->chip->set_wake(irq, 0);
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-EXPORT_SYMBOL(disable_irq_wake);
+void (*init_arch_irq)(void) __initdata = NULL;
+unsigned long irq_err_count;
int show_interrupts(struct seq_file *p, void *v)
{
@@ -242,8 +69,8 @@ int show_interrupts(struct seq_file *p, void *v)
}
if (i < NR_IRQS) {
- spin_lock_irqsave(&irq_controller_lock, flags);
- action = irq_desc[i].action;
+ spin_lock_irqsave(&irq_desc[i].lock, flags);
+ action = irq_desc[i].action;
if (!action)
goto unlock;
@@ -256,7 +83,7 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
unlock:
- spin_unlock_irqrestore(&irq_controller_lock, flags);
+ spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
#ifdef CONFIG_ARCH_ACORN
show_fiq_list(p, v);
@@ -270,267 +97,11 @@ unlock:
return 0;
}
-/*
- * IRQ lock detection.
- *
- * Hopefully, this should get us out of a few locked situations.
- * However, it may take a while for this to happen, since we need
- * a large number if IRQs to appear in the same jiffie with the
- * same instruction pointer (or within 2 instructions).
- */
-static int check_irq_lock(struct irqdesc *desc, int irq, struct pt_regs *regs)
-{
- unsigned long instr_ptr = instruction_pointer(regs);
-
- if (desc->lck_jif == jiffies &&
- desc->lck_pc >= instr_ptr && desc->lck_pc < instr_ptr + 8) {
- desc->lck_cnt += 1;
-
- if (desc->lck_cnt > MAX_IRQ_CNT) {
- printk(KERN_ERR "IRQ LOCK: IRQ%d is locking the system, disabled\n", irq);
- return 1;
- }
- } else {
- desc->lck_cnt = 0;
- desc->lck_pc = instruction_pointer(regs);
- desc->lck_jif = jiffies;
- }
- return 0;
-}
-
-static void
-report_bad_irq(unsigned int irq, struct pt_regs *regs, struct irqdesc *desc, int ret)
-{
- static int count = 100;
- struct irqaction *action;
-
- if (noirqdebug)
- return;
-
- if (ret != IRQ_HANDLED && ret != IRQ_NONE) {
- if (!count)
- return;
- count--;
- printk("irq%u: bogus retval mask %x\n", irq, ret);
- } else {
- desc->irqs_unhandled++;
- if (desc->irqs_unhandled <= 99900)
- return;
- desc->irqs_unhandled = 0;
- printk("irq%u: nobody cared\n", irq);
- }
- show_regs(regs);
- dump_stack();
- printk(KERN_ERR "handlers:");
- action = desc->action;
- do {
- printk("\n" KERN_ERR "[<%p>]", action->handler);
- print_symbol(" (%s)", (unsigned long)action->handler);
- action = action->next;
- } while (action);
- printk("\n");
-}
-
-static int
-__do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs)
-{
- unsigned int status;
- int ret, retval = 0;
-
- spin_unlock(&irq_controller_lock);
-
-#ifdef CONFIG_NO_IDLE_HZ
- if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) {
- spin_lock(&system_timer->dyn_tick->lock);
- if (system_timer->dyn_tick->state & DYN_TICK_ENABLED)
- system_timer->dyn_tick->handler(irq, 0, regs);
- spin_unlock(&system_timer->dyn_tick->lock);
- }
-#endif
-
- if (!(action->flags & SA_INTERRUPT))
- local_irq_enable();
-
- status = 0;
- do {
- ret = action->handler(irq, action->dev_id, regs);
- if (ret == IRQ_HANDLED)
- status |= action->flags;
- retval |= ret;
- action = action->next;
- } while (action);
-
- if (status & SA_SAMPLE_RANDOM)
- add_interrupt_randomness(irq);
-
- spin_lock_irq(&irq_controller_lock);
-
- return retval;
-}
-
-/*
- * This is for software-decoded IRQs. The caller is expected to
- * handle the ack, clear, mask and unmask issues.
- */
-void
-do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
- struct irqaction *action;
- const unsigned int cpu = smp_processor_id();
-
- desc->triggered = 1;
-
- kstat_cpu(cpu).irqs[irq]++;
-
- smp_set_running(desc);
-
- action = desc->action;
- if (action) {
- int ret = __do_irq(irq, action, regs);
- if (ret != IRQ_HANDLED)
- report_bad_irq(irq, regs, desc, ret);
- }
-
- smp_clear_running(desc);
-}
-
-/*
- * Most edge-triggered IRQ implementations seem to take a broken
- * approach to this. Hence the complexity.
- */
-void
-do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
- const unsigned int cpu = smp_processor_id();
-
- desc->triggered = 1;
-
- /*
- * If we're currently running this IRQ, or its disabled,
- * we shouldn't process the IRQ. Instead, turn on the
- * hardware masks.
- */
- if (unlikely(desc->running || desc->disable_depth))
- goto running;
-
- /*
- * Acknowledge and clear the IRQ, but don't mask it.
- */
- desc->chip->ack(irq);
-
- /*
- * Mark the IRQ currently in progress.
- */
- desc->running = 1;
-
- kstat_cpu(cpu).irqs[irq]++;
-
- do {
- struct irqaction *action;
-
- action = desc->action;
- if (!action)
- break;
-
- if (desc->pending && !desc->disable_depth) {
- desc->pending = 0;
- desc->chip->unmask(irq);
- }
-
- __do_irq(irq, action, regs);
- } while (desc->pending && !desc->disable_depth);
-
- desc->running = 0;
-
- /*
- * If we were disabled or freed, shut down the handler.
- */
- if (likely(desc->action && !check_irq_lock(desc, irq, regs)))
- return;
-
- running:
- /*
- * We got another IRQ while this one was masked or
- * currently running. Delay it.
- */
- desc->pending = 1;
- desc->chip->mask(irq);
- desc->chip->ack(irq);
-}
-
-/*
- * Level-based IRQ handler. Nice and simple.
- */
-void
-do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
- struct irqaction *action;
- const unsigned int cpu = smp_processor_id();
-
- desc->triggered = 1;
-
- /*
- * Acknowledge, clear _AND_ disable the interrupt.
- */
- desc->chip->ack(irq);
-
- if (likely(!desc->disable_depth)) {
- kstat_cpu(cpu).irqs[irq]++;
-
- smp_set_running(desc);
-
- /*
- * Return with this interrupt masked if no action
- */
- action = desc->action;
- if (action) {
- int ret = __do_irq(irq, desc->action, regs);
-
- if (ret != IRQ_HANDLED)
- report_bad_irq(irq, regs, desc, ret);
-
- if (likely(!desc->disable_depth &&
- !check_irq_lock(desc, irq, regs)))
- desc->chip->unmask(irq);
- }
-
- smp_clear_running(desc);
- }
-}
-
-static void do_pending_irqs(struct pt_regs *regs)
-{
- struct list_head head, *l, *n;
-
- do {
- struct irqdesc *desc;
-
- /*
- * First, take the pending interrupts off the list.
- * The act of calling the handlers may add some IRQs
- * back onto the list.
- */
- head = irq_pending;
- INIT_LIST_HEAD(&irq_pending);
- head.next->prev = &head;
- head.prev->next = &head;
-
- /*
- * Now run each entry. We must delete it from our
- * list before calling the handler.
- */
- list_for_each_safe(l, n, &head) {
- desc = list_entry(l, struct irqdesc, pend);
- list_del_init(&desc->pend);
- desc_handle_irq(desc - irq_desc, desc, regs);
- }
-
- /*
- * The list must be empty.
- */
- BUG_ON(!list_empty(&head));
- } while (!list_empty(&irq_pending));
-}
+/* Handle bad interrupts */
+static struct irq_desc bad_irq_desc = {
+ .handle_irq = handle_bad_irq,
+ .lock = SPIN_LOCK_UNLOCKED
+};
/*
* do_IRQ handles all hardware IRQ's. Decoded IRQs should not
@@ -549,96 +120,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
desc = &bad_irq_desc;
irq_enter();
- spin_lock(&irq_controller_lock);
- desc_handle_irq(irq, desc, regs);
- /*
- * Now re-run any pending interrupts.
- */
- if (!list_empty(&irq_pending))
- do_pending_irqs(regs);
+ desc_handle_irq(irq, desc, regs);
+ /* AT91 specific workaround */
irq_finish(irq);
- spin_unlock(&irq_controller_lock);
irq_exit();
}
-void __set_irq_handler(unsigned int irq, irq_handler_t handle, int is_chained)
-{
- struct irqdesc *desc;
- unsigned long flags;
-
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to install handler for IRQ%d\n", irq);
- return;
- }
-
- if (handle == NULL)
- handle = do_bad_IRQ;
-
- desc = irq_desc + irq;
-
- if (is_chained && desc->chip == &bad_chip)
- printk(KERN_WARNING "Trying to install chained handler for IRQ%d\n", irq);
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- if (handle == do_bad_IRQ) {
- desc->chip->mask(irq);
- desc->chip->ack(irq);
- desc->disable_depth = 1;
- }
- desc->handle = handle;
- if (handle != do_bad_IRQ && is_chained) {
- desc->valid = 0;
- desc->probe_ok = 0;
- desc->disable_depth = 0;
- desc->chip->unmask(irq);
- }
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-void set_irq_chip(unsigned int irq, struct irqchip *chip)
-{
- struct irqdesc *desc;
- unsigned long flags;
-
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
- return;
- }
-
- if (chip == NULL)
- chip = &bad_chip;
-
- desc = irq_desc + irq;
- spin_lock_irqsave(&irq_controller_lock, flags);
- desc->chip = chip;
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-int set_irq_type(unsigned int irq, unsigned int type)
-{
- struct irqdesc *desc;
- unsigned long flags;
- int ret = -ENXIO;
-
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
- return -ENODEV;
- }
-
- desc = irq_desc + irq;
- if (desc->chip->set_type) {
- spin_lock_irqsave(&irq_controller_lock, flags);
- ret = desc->chip->set_type(irq, type);
- spin_unlock_irqrestore(&irq_controller_lock, flags);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(set_irq_type);
-
void set_irq_flags(unsigned int irq, unsigned int iflags)
{
struct irqdesc *desc;
@@ -650,421 +140,32 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
}
desc = irq_desc + irq;
- spin_lock_irqsave(&irq_controller_lock, flags);
- desc->valid = (iflags & IRQF_VALID) != 0;
- desc->probe_ok = (iflags & IRQF_PROBE) != 0;
- desc->noautoenable = (iflags & IRQF_NOAUTOEN) != 0;
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-}
-
-int setup_irq(unsigned int irq, struct irqaction *new)
-{
- int shared = 0;
- struct irqaction *old, **p;
- unsigned long flags;
- struct irqdesc *desc;
-
- /*
- * Some drivers like serial.c use request_irq() heavily,
- * so we have to be careful not to interfere with a
- * running system.
- */
- if (new->flags & SA_SAMPLE_RANDOM) {
- /*
- * This function might sleep, we want to call it first,
- * outside of the atomic block.
- * Yes, this might clear the entropy pool if the wrong
- * driver is attempted to be loaded, without actually
- * installing a new handler, but is this really a problem,
- * only the sysadmin is able to do this.
- */
- rand_initialize_irq(irq);
- }
-
- /*
- * The following block of code has to be executed atomically
- */
- desc = irq_desc + irq;
- spin_lock_irqsave(&irq_controller_lock, flags);
- p = &desc->action;
- if ((old = *p) != NULL) {
- /*
- * Can't share interrupts unless both agree to and are
- * the same type.
- */
- if (!(old->flags & new->flags & SA_SHIRQ) ||
- (~old->flags & new->flags) & SA_TRIGGER_MASK) {
- spin_unlock_irqrestore(&irq_controller_lock, flags);
- return -EBUSY;
- }
-
- /* add new interrupt at end of irq queue */
- do {
- p = &old->next;
- old = *p;
- } while (old);
- shared = 1;
- }
-
- *p = new;
-
- if (!shared) {
- desc->probing = 0;
- desc->running = 0;
- desc->pending = 0;
- desc->disable_depth = 1;
-
- if (new->flags & SA_TRIGGER_MASK &&
- desc->chip->set_type) {
- unsigned int type = new->flags & SA_TRIGGER_MASK;
- desc->chip->set_type(irq, type);
- }
-
- if (!desc->noautoenable) {
- desc->disable_depth = 0;
- desc->chip->unmask(irq);
- }
- }
-
- spin_unlock_irqrestore(&irq_controller_lock, flags);
- return 0;
-}
-
-/**
- * request_irq - allocate an interrupt line
- * @irq: Interrupt line to allocate
- * @handler: Function to be called when the IRQ occurs
- * @irqflags: Interrupt type flags
- * @devname: An ascii name for the claiming device
- * @dev_id: A cookie passed back to the handler function
- *
- * This call allocates interrupt resources and enables the
- * interrupt line and IRQ handling. From the point this
- * call is made your handler function may be invoked. Since
- * your handler function must clear any interrupt the board
- * raises, you must take care both to initialise your hardware
- * and to set up the interrupt handler in the right order.
- *
- * Dev_id must be globally unique. Normally the address of the
- * device data structure is used as the cookie. Since the handler
- * receives this value it makes sense to use it.
- *
- * If your interrupt is shared you must pass a non NULL dev_id
- * as this is required when freeing the interrupt.
- *
- * Flags:
- *
- * SA_SHIRQ Interrupt is shared
- *
- * SA_INTERRUPT Disable local interrupts while processing
- *
- * SA_SAMPLE_RANDOM The interrupt can be used for entropy
- *
- */
-int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irq_flags, const char * devname, void *dev_id)
-{
- unsigned long retval;
- struct irqaction *action;
-
- if (irq >= NR_IRQS || !irq_desc[irq].valid || !handler ||
- (irq_flags & SA_SHIRQ && !dev_id))
- return -EINVAL;
-
- action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
- if (!action)
- return -ENOMEM;
-
- action->handler = handler;
- action->flags = irq_flags;
- cpus_clear(action->mask);
- action->name = devname;
- action->next = NULL;
- action->dev_id = dev_id;
-
- retval = setup_irq(irq, action);
-
- if (retval)
- kfree(action);
- return retval;
-}
-
-EXPORT_SYMBOL(request_irq);
-
-/**
- * free_irq - free an interrupt
- * @irq: Interrupt line to free
- * @dev_id: Device identity to free
- *
- * Remove an interrupt handler. The handler is removed and if the
- * interrupt line is no longer in use by any driver it is disabled.
- * On a shared IRQ the caller must ensure the interrupt is disabled
- * on the card it drives before calling this function.
- *
- * This function must not be called from interrupt context.
- */
-void free_irq(unsigned int irq, void *dev_id)
-{
- struct irqaction * action, **p;
- unsigned long flags;
-
- if (irq >= NR_IRQS || !irq_desc[irq].valid) {
- printk(KERN_ERR "Trying to free IRQ%d\n",irq);
- dump_stack();
- return;
- }
-
- spin_lock_irqsave(&irq_controller_lock, flags);
- for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next) {
- if (action->dev_id != dev_id)
- continue;
-
- /* Found it - now free it */
- *p = action->next;
- break;
- }
- spin_unlock_irqrestore(&irq_controller_lock, flags);
-
- if (!action) {
- printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
- dump_stack();
- } else {
- synchronize_irq(irq);
- kfree(action);
- }
-}
-
-EXPORT_SYMBOL(free_irq);
-
-static DECLARE_MUTEX(probe_sem);
-
-/* Start the interrupt probing. Unlike other architectures,
- * we don't return a mask of interrupts from probe_irq_on,
- * but return the number of interrupts enabled for the probe.
- * The interrupts which have been enabled for probing is
- * instead recorded in the irq_desc structure.
- */
-unsigned long probe_irq_on(void)
-{
- unsigned int i, irqs = 0;
- unsigned long delay;
-
- down(&probe_sem);
-
- /*
- * first snaffle up any unassigned but
- * probe-able interrupts
- */
- spin_lock_irq(&irq_controller_lock);
- for (i = 0; i < NR_IRQS; i++) {
- if (!irq_desc[i].probe_ok || irq_desc[i].action)
- continue;
-
- irq_desc[i].probing = 1;
- irq_desc[i].triggered = 0;
- if (irq_desc[i].chip->set_type)
- irq_desc[i].chip->set_type(i, IRQT_PROBE);
- irq_desc[i].chip->unmask(i);
- irqs += 1;
- }
- spin_unlock_irq(&irq_controller_lock);
-
- /*
- * wait for spurious interrupts to mask themselves out again
- */
- for (delay = jiffies + HZ/10; time_before(jiffies, delay); )
- /* min 100ms delay */;
-
- /*
- * now filter out any obviously spurious interrupts
- */
- spin_lock_irq(&irq_controller_lock);
- for (i = 0; i < NR_IRQS; i++) {
- if (irq_desc[i].probing && irq_desc[i].triggered) {
- irq_desc[i].probing = 0;
- irqs -= 1;
- }
- }
- spin_unlock_irq(&irq_controller_lock);
-
- return irqs;
-}
-
-EXPORT_SYMBOL(probe_irq_on);
-
-unsigned int probe_irq_mask(unsigned long irqs)
-{
- unsigned int mask = 0, i;
-
- spin_lock_irq(&irq_controller_lock);
- for (i = 0; i < 16 && i < NR_IRQS; i++)
- if (irq_desc[i].probing && irq_desc[i].triggered)
- mask |= 1 << i;
- spin_unlock_irq(&irq_controller_lock);
-
- up(&probe_sem);
-
- return mask;
-}
-EXPORT_SYMBOL(probe_irq_mask);
-
-/*
- * Possible return values:
- * >= 0 - interrupt number
- * -1 - no interrupt/many interrupts
- */
-int probe_irq_off(unsigned long irqs)
-{
- unsigned int i;
- int irq_found = NO_IRQ;
-
- /*
- * look at the interrupts, and find exactly one
- * that we were probing has been triggered
- */
- spin_lock_irq(&irq_controller_lock);
- for (i = 0; i < NR_IRQS; i++) {
- if (irq_desc[i].probing &&
- irq_desc[i].triggered) {
- if (irq_found != NO_IRQ) {
- irq_found = NO_IRQ;
- goto out;
- }
- irq_found = i;
- }
- }
-
- if (irq_found == -1)
- irq_found = NO_IRQ;
-out:
- spin_unlock_irq(&irq_controller_lock);
-
- up(&probe_sem);
-
- return irq_found;
-}
-
-EXPORT_SYMBOL(probe_irq_off);
-
-#ifdef CONFIG_SMP
-static void route_irq(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
-{
- pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu);
-
- spin_lock_irq(&irq_controller_lock);
- desc->cpu = cpu;
- desc->chip->set_cpu(desc, irq, cpu);
- spin_unlock_irq(&irq_controller_lock);
-}
-
-#ifdef CONFIG_PROC_FS
-static int
-irq_affinity_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
-{
- struct irqdesc *desc = irq_desc + ((int)data);
- int len = cpumask_scnprintf(page, count, desc->affinity);
-
- if (count - len < 2)
- return -EINVAL;
- page[len++] = '\n';
- page[len] = '\0';
-
- return len;
-}
-
-static int
-irq_affinity_write_proc(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
-{
- unsigned int irq = (unsigned int)data;
- struct irqdesc *desc = irq_desc + irq;
- cpumask_t affinity, tmp;
- int ret = -EIO;
-
- if (!desc->chip->set_cpu)
- goto out;
-
- ret = cpumask_parse(buffer, count, affinity);
- if (ret)
- goto out;
-
- cpus_and(tmp, affinity, cpu_online_map);
- if (cpus_empty(tmp)) {
- ret = -EINVAL;
- goto out;
- }
-
- desc->affinity = affinity;
- route_irq(desc, irq, first_cpu(tmp));
- ret = count;
-
- out:
- return ret;
-}
-#endif
-#endif
-
-void __init init_irq_proc(void)
-{
-#if defined(CONFIG_SMP) && defined(CONFIG_PROC_FS)
- struct proc_dir_entry *dir;
- int irq;
-
- dir = proc_mkdir("irq", NULL);
- if (!dir)
- return;
-
- for (irq = 0; irq < NR_IRQS; irq++) {
- struct proc_dir_entry *entry;
- struct irqdesc *desc;
- char name[16];
-
- desc = irq_desc + irq;
- memset(name, 0, sizeof(name));
- snprintf(name, sizeof(name) - 1, "%u", irq);
-
- desc->procdir = proc_mkdir(name, dir);
- if (!desc->procdir)
- continue;
-
- entry = create_proc_entry("smp_affinity", 0600, desc->procdir);
- if (entry) {
- entry->nlink = 1;
- entry->data = (void *)irq;
- entry->read_proc = irq_affinity_read_proc;
- entry->write_proc = irq_affinity_write_proc;
- }
- }
-#endif
+ spin_lock_irqsave(&desc->lock, flags);
+ desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
+ if (iflags & IRQF_VALID)
+ desc->status &= ~IRQ_NOREQUEST;
+ if (iflags & IRQF_PROBE)
+ desc->status &= ~IRQ_NOPROBE;
+ if (!(iflags & IRQF_NOAUTOEN))
+ desc->status &= ~IRQ_NOAUTOEN;
+ spin_unlock_irqrestore(&desc->lock, flags);
}
void __init init_IRQ(void)
{
- struct irqdesc *desc;
int irq;
+ for (irq = 0; irq < NR_IRQS; irq++)
+ irq_desc[irq].status |= IRQ_NOREQUEST | IRQ_DELAYED_DISABLE |
+ IRQ_NOPROBE;
+
#ifdef CONFIG_SMP
bad_irq_desc.affinity = CPU_MASK_ALL;
bad_irq_desc.cpu = smp_processor_id();
#endif
-
- for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) {
- *desc = bad_irq_desc;
- INIT_LIST_HEAD(&desc->pend);
- }
-
init_arch_irq();
}
-static int __init noirqdebug_setup(char *str)
-{
- noirqdebug = 1;
- return 1;
-}
-
-__setup("noirqdebug", noirqdebug_setup);
-
#ifdef CONFIG_HOTPLUG_CPU
/*
* The CPU has been marked offline. Migrate IRQs off this CPU. If
diff --git a/include/asm-arm/dyntick.h b/include/asm-arm/dyntick.h
new file mode 100644
index 000000000000..19fab2d2b760
--- /dev/null
+++ b/include/asm-arm/dyntick.h
@@ -0,0 +1,6 @@
+#ifndef _ASMARM_DYNTICK_H
+#define _ASMARM_DYNTICK_H
+
+#include <asm/mach/time.h>
+
+#endif /* _ASMARM_DYNTICK_H */
diff --git a/include/asm-arm/hw_irq.h b/include/asm-arm/hw_irq.h
new file mode 100644
index 000000000000..f1a08a500604
--- /dev/null
+++ b/include/asm-arm/hw_irq.h
@@ -0,0 +1,9 @@
+/*
+ * Nothing to see here yet
+ */
+#ifndef _ARCH_ARM_HW_IRQ_H
+#define _ARCH_ARM_HW_IRQ_H
+
+#include <asm/mach/irq.h>
+
+#endif
diff --git a/include/asm-arm/irq.h b/include/asm-arm/irq.h
index 66e67e60bc56..283af50a16cb 100644
--- a/include/asm-arm/irq.h
+++ b/include/asm-arm/irq.h
@@ -21,18 +21,13 @@
struct irqaction;
-extern void disable_irq_nosync(unsigned int);
-extern void disable_irq(unsigned int);
-extern void enable_irq(unsigned int);
-
/*
- * These correspond with the SA_TRIGGER_* defines, and therefore the
- * IORESOURCE_IRQ_* defines.
+ * Migration helpers
*/
-#define __IRQT_RISEDGE (1 << 0)
-#define __IRQT_FALEDGE (1 << 1)
-#define __IRQT_HIGHLVL (1 << 2)
-#define __IRQT_LOWLVL (1 << 3)
+#define __IRQT_FALEDGE IRQ_TYPE_EDGE_FALLING
+#define __IRQT_RISEDGE IRQ_TYPE_EDGE_RISING
+#define __IRQT_LOWLVL IRQ_TYPE_LEVEL_LOW
+#define __IRQT_HIGHLVL IRQ_TYPE_LEVEL_HIGH
#define IRQT_NOEDGE (0)
#define IRQT_RISING (__IRQT_RISEDGE)
@@ -40,12 +35,7 @@ extern void enable_irq(unsigned int);
#define IRQT_BOTHEDGE (__IRQT_RISEDGE|__IRQT_FALEDGE)
#define IRQT_LOW (__IRQT_LOWLVL)
#define IRQT_HIGH (__IRQT_HIGHLVL)
-#define IRQT_PROBE (1 << 4)
-
-int set_irq_type(unsigned int irq, unsigned int type);
-void disable_irq_wake(unsigned int irq);
-void enable_irq_wake(unsigned int irq);
-int setup_irq(unsigned int, struct irqaction *);
+#define IRQT_PROBE IRQ_TYPE_PROBE
extern void migrate_irqs(void);
#endif
diff --git a/include/asm-arm/mach/irq.h b/include/asm-arm/mach/irq.h
index d4d420ecf3a8..131f33733d25 100644
--- a/include/asm-arm/mach/irq.h
+++ b/include/asm-arm/mach/irq.h
@@ -10,95 +10,9 @@
#ifndef __ASM_ARM_MACH_IRQ_H
#define __ASM_ARM_MACH_IRQ_H
-struct irqdesc;
-struct pt_regs;
-struct seq_file;
-
-typedef void (*irq_handler_t)(unsigned int, struct irqdesc *, struct pt_regs *);
-typedef void (*irq_control_t)(unsigned int);
-
-struct irqchip {
- /*
- * Acknowledge the IRQ.
- * If this is a level-based IRQ, then it is expected to mask the IRQ
- * as well.
- */
- void (*ack)(unsigned int);
- /*
- * Mask the IRQ in hardware.
- */
- void (*mask)(unsigned int);
- /*
- * Unmask the IRQ in hardware.
- */
- void (*unmask)(unsigned int);
- /*
- * Ask the hardware to re-trigger the IRQ.
- * Note: This method _must_ _not_ call the interrupt handler.
- * If you are unable to retrigger the interrupt, do not
- * provide a function, or if you do, return non-zero.
- */
- int (*retrigger)(unsigned int);
- /*
- * Set the type of the IRQ.
- */
- int (*set_type)(unsigned int, unsigned int);
- /*
- * Set wakeup-enable on the selected IRQ
- */
- int (*set_wake)(unsigned int, unsigned int);
-
-#ifdef CONFIG_SMP
- /*
- * Route an interrupt to a CPU
- */
- void (*set_cpu)(struct irqdesc *desc, unsigned int irq, unsigned int cpu);
-#endif
-};
-
-struct irqdesc {
- irq_handler_t handle;
- struct irqchip *chip;
- struct irqaction *action;
- struct list_head pend;
- void __iomem *base;
- void *data;
- unsigned int disable_depth;
-
- unsigned int triggered: 1; /* IRQ has occurred */
- unsigned int running : 1; /* IRQ is running */
- unsigned int pending : 1; /* IRQ is pending */
- unsigned int probing : 1; /* IRQ in use for a probe */
- unsigned int probe_ok : 1; /* IRQ can be used for probe */
- unsigned int valid : 1; /* IRQ claimable */
- unsigned int noautoenable : 1; /* don't automatically enable IRQ */
- unsigned int unused :25;
-
- unsigned int irqs_unhandled;
- struct proc_dir_entry *procdir;
-
-#ifdef CONFIG_SMP
- cpumask_t affinity;
- unsigned int cpu;
-#endif
-
- /*
- * IRQ lock detection
- */
- unsigned int lck_cnt;
- unsigned int lck_pc;
- unsigned int lck_jif;
-};
-
-extern struct irqdesc irq_desc[];
+#include <linux/irq.h>
-/*
- * Helpful inline function for calling irq descriptor handlers.
- */
-static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
-{
- desc->handle(irq, desc, regs);
-}
+struct seq_file;
/*
* This is internal. Do not use it.
@@ -106,18 +20,22 @@ static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struc
extern void (*init_arch_irq)(void);
extern void init_FIQ(void);
extern int show_fiq_list(struct seq_file *, void *);
-void __set_irq_handler(unsigned int irq, irq_handler_t, int);
/*
- * External stuff.
+ * Function wrappers
+ */
+#define set_irq_chipdata(irq, d) set_irq_chip_data(irq, d)
+#define get_irq_chipdata(irq) get_irq_chip_data(irq)
+
+/*
+ * Obsolete inline function for calling irq descriptor handlers.
*/
-#define set_irq_handler(irq,handler) __set_irq_handler(irq,handler,0)
-#define set_irq_chained_handler(irq,handler) __set_irq_handler(irq,handler,1)
-#define set_irq_data(irq,d) do { irq_desc[irq].data = d; } while (0)
-#define set_irq_chipdata(irq,d) do { irq_desc[irq].base = d; } while (0)
-#define get_irq_chipdata(irq) (irq_desc[irq].base)
+static inline void desc_handle_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs)
+{
+ desc->handle_irq(irq, desc, regs);
+}
-void set_irq_chip(unsigned int irq, struct irqchip *);
void set_irq_flags(unsigned int irq, unsigned int flags);
#define IRQF_VALID (1 << 0)
@@ -125,12 +43,25 @@ void set_irq_flags(unsigned int irq, unsigned int flags);
#define IRQF_NOAUTOEN (1 << 2)
/*
- * Built-in IRQ handlers.
+ * This is for easy migration, but should be changed in the source
*/
-void do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs);
-void dummy_mask_unmask_irq(unsigned int irq);
+#define do_level_IRQ handle_level_irq
+#define do_edge_IRQ handle_edge_irq
+#define do_simple_IRQ handle_simple_irq
+#define irqdesc irq_desc
+#define irqchip irq_chip
+
+#define do_bad_IRQ(irq,desc,regs) \
+do { \
+ spin_lock(&desc->lock); \
+ handle_bad_irq(irq, desc, regs); \
+ spin_unlock(&desc->lock); \
+} while(0)
+
+extern unsigned long irq_err_count;
+static inline void ack_bad_irq(int irq)
+{
+ irq_err_count++;
+}
#endif
OpenPOWER on IntegriCloud