#include <asm/system.h>
#include <asm/uaccess.h>
+static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
+
+int __devinit allocate_irqno(void)
+{
+ int irq;
+
+again:
+ irq = find_first_zero_bit(irq_map, NR_IRQS);
+
+ if (irq >= NR_IRQS)
+ return -ENOSPC;
+
+ if (test_and_set_bit(irq, irq_map))
+ goto again;
+
+ return irq;
+}
+
+EXPORT_SYMBOL_GPL(allocate_irqno);
+
+/*
+ * Allocate the 16 legacy interrupts for i8259 devices. This happens early
+ * in the kernel initialization so treating allocation failure as BUG() is
+ * ok.
+ */
+void __init alloc_legacy_irqno(void)
+{
+ int i;
+
+ for (i = 0; i <= 16; i++)
+ BUG_ON(test_and_set_bit(i, irq_map));
+}
+
+void __devinit free_irqno(unsigned int irq)
+{
+ smp_mb__before_clear_bit();
+ clear_bit(irq, irq_map);
+ smp_mb__after_clear_bit();
+}
+
+EXPORT_SYMBOL_GPL(free_irqno);
+
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
* each architecture has to answer this themselves.
unsigned long irq_hwmask[NR_IRQS];
#endif /* CONFIG_MIPS_MT_SMTC */
-#undef do_IRQ
-
-/*
- * do_IRQ handles all normal device IRQ's (the special
- * SMP cross-CPU interrupts have their own specific
- * handlers).
- */
-asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
-{
- irq_enter();
-
- __DO_IRQ_SMTC_HOOK();
- __do_IRQ(irq, regs);
-
- irq_exit();
-
- return 1;
-}
-
/*
* Generic, controller-independent functions:
*/
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %14s", irq_desc[i].chip->name);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
return 0;
}
-asmlinkage void spurious_interrupt(struct pt_regs *regs)
+asmlinkage void spurious_interrupt(void)
{
atomic_inc(&irq_err_count);
}
void __init init_IRQ(void)
{
- int i;
-
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = NULL;
- irq_desc[i].depth = 1;
- irq_desc[i].chip = &no_irq_chip;
- spin_lock_init(&irq_desc[i].lock);
-#ifdef CONFIG_MIPS_MT_SMTC
- irq_hwmask[i] = 0;
-#endif /* CONFIG_MIPS_MT_SMTC */
- }
-
arch_init_irq();
#ifdef CONFIG_KGDB