#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
+#include <linux/kgdb.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/uaccess.h>
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
+#ifdef CONFIG_KGDB
+int kgdb_early_setup;
+#endif
+
+static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
+
+int allocate_irqno(void)
{
- printk("unexpected IRQ # %d\n", irq);
-}
+ int irq;
-atomic_t irq_err_count;
+again:
+ irq = find_first_zero_bit(irq_map, NR_IRQS);
-#ifdef CONFIG_MIPS_MT_SMTC
-/*
- * SMTC Kernel needs to manipulate low-level CPU interrupt mask
- * in do_IRQ. These are passed in setup_irq_smtc() and stored
- * in this table.
- */
-unsigned long irq_hwmask[NR_IRQS];
-#endif /* CONFIG_MIPS_MT_SMTC */
+ if (irq >= NR_IRQS)
+ return -ENOSPC;
+
+ if (test_and_set_bit(irq, irq_map))
+ goto again;
-#undef do_IRQ
+ return irq;
+}
/*
- * do_IRQ handles all normal device IRQ's (the special
- * SMP cross-CPU interrupts have their own specific
- * handlers).
+ * Allocate the 16 legacy interrupts for i8259 devices. This happens early
+ * in the kernel initialization so treating allocation failure as BUG() is
+ * ok.
*/
-asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
+void __init alloc_legacy_irqno(void)
{
- irq_enter();
+ int i;
- __DO_IRQ_SMTC_HOOK();
- __do_IRQ(irq, regs);
+ for (i = 0; i <= 16; i++)
+ BUG_ON(test_and_set_bit(i, irq_map));
+}
- irq_exit();
+void free_irqno(unsigned int irq)
+{
+ smp_mb__before_clear_bit();
+ clear_bit(irq, irq_map);
+ smp_mb__after_clear_bit();
+}
- return 1;
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+ smtc_im_ack_irq(irq);
+ printk("unexpected IRQ # %d\n", irq);
}
+atomic_t irq_err_count;
+
/*
* Generic, controller-independent functions:
*/
if (i == 0) {
seq_printf(p, " ");
for_each_online_cpu(j)
- seq_printf(p, "CPU%d ",j);
+ seq_printf(p, "CPU%d ", j);
seq_putc(p, '\n');
}
action = irq_desc[i].action;
if (!action)
goto skip;
- seq_printf(p, "%3d: ",i);
+ seq_printf(p, "%3d: ", i);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
#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);
}
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
- kgdb_flag = 0;
- return 1;
-}
-__setup("nokgdb", nokgdb);
-#endif
-
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 */
- }
+#ifdef CONFIG_KGDB
+ if (kgdb_early_setup)
+ return;
+#endif
+
+ for (i = 0; i < NR_IRQS; i++)
+ set_irq_noprobe(i);
arch_init_irq();
#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- printk("Wait for gdb client connection ...\n");
- set_debug_traps();
- breakpoint();
- }
+ if (!kgdb_early_setup)
+ kgdb_early_setup = 1;
#endif
}