struct thread_info *curtp, *irqtp;
#endif
- irq_enter();
+ irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 2KB free? */
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
- irq_exit();
+ irq_exit();
set_irq_regs(old_regs);
#ifdef CONFIG_PPC_ISERIES
void __init init_IRQ(void)
{
- ppc_md.init_IRQ();
+ if (ppc_md.init_IRQ)
+ ppc_md.init_IRQ();
#ifdef CONFIG_PPC64
irq_ctx_init();
#endif
static unsigned int irq_virq_count = NR_IRQS;
static struct irq_host *irq_default_host;
-struct irq_host *irq_alloc_host(unsigned int revmap_type,
+irq_hw_number_t virq_to_hw(unsigned int virq)
+{
+ return irq_map[virq].hwirq;
+}
+EXPORT_SYMBOL_GPL(virq_to_hw);
+
+__init_refok struct irq_host *irq_alloc_host(struct device_node *of_node,
+ unsigned int revmap_type,
unsigned int revmap_arg,
struct irq_host_ops *ops,
irq_hw_number_t inval_irq)
host->revmap_type = revmap_type;
host->inval_irq = inval_irq;
host->ops = ops;
+ host->of_node = of_node;
spin_lock_irqsave(&irq_big_lock, flags);
local_irq_restore(flags);
}
+static int irq_setup_virq(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ /* Clear IRQ_NOREQUEST flag */
+ get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
+
+ /* map it */
+ smp_wmb();
+ irq_map[virq].hwirq = hwirq;
+ smp_mb();
+
+ if (host->ops->map(host, virq, hwirq)) {
+ pr_debug("irq: -> mapping failed, freeing\n");
+ irq_free_virt(virq, 1);
+ return -1;
+ }
+
+ return 0;
+}
+
+unsigned int irq_create_direct_mapping(struct irq_host *host)
+{
+ unsigned int virq;
+
+ if (host == NULL)
+ host = irq_default_host;
+
+ BUG_ON(host == NULL);
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP);
+
+ virq = irq_alloc_virt(host, 1, 0);
+ if (virq == NO_IRQ) {
+ pr_debug("irq: create_direct virq allocation failed\n");
+ return NO_IRQ;
+ }
+
+ pr_debug("irq: create_direct obtained virq %d\n", virq);
+
+ if (irq_setup_virq(host, virq, virq))
+ return NO_IRQ;
+
+ return virq;
+}
unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq)
}
pr_debug("irq: -> obtained virq %d\n", virq);
- /* Clear IRQ_NOREQUEST flag */
- get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
-
- /* map it */
- smp_wmb();
- irq_map[virq].hwirq = hwirq;
- smp_mb();
- if (host->ops->map(host, virq, hwirq)) {
- pr_debug("irq: -> mapping failed, freeing\n");
- irq_free_virt(virq, 1);
+ if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
- }
+
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);