| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/m32r/kernel/irq.c |
| 3 | * |
| 4 | * Copyright (c) 2003, 2004 Hitoshi Yamamoto |
| 5 | * Copyright (c) 2004 Hirokazu Takata <takata at linux-m32r.org> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * linux/arch/i386/kernel/irq.c |
| 10 | * |
| 11 | * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar |
| 12 | * |
| 13 | * This file contains the lowest level m32r-specific interrupt |
| 14 | * entry and irq statistics code. All the remaining irq logic is |
| 15 | * done by the generic kernel/irq/ code and in the |
| 16 | * m32r-specific irq controller code. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/kernel_stat.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/seq_file.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <asm/uaccess.h> |
| 24 | |
| 25 | atomic_t irq_err_count; |
| 26 | atomic_t irq_mis_count; |
| 27 | |
| 28 | /* |
| 29 | * Generic, controller-independent functions: |
| 30 | */ |
| 31 | |
| 32 | int show_interrupts(struct seq_file *p, void *v) |
| 33 | { |
| 34 | int i = *(loff_t *) v, j; |
| 35 | struct irqaction * action; |
| 36 | unsigned long flags; |
| 37 | |
| 38 | if (i == 0) { |
| 39 | seq_printf(p, " "); |
| 40 | for (j=0; j<NR_CPUS; j++) |
| 41 | if (cpu_online(j)) |
| 42 | seq_printf(p, "CPU%d ",j); |
| 43 | seq_putc(p, '\n'); |
| 44 | } |
| 45 | |
| 46 | if (i < NR_IRQS) { |
| 47 | spin_lock_irqsave(&irq_desc[i].lock, flags); |
| 48 | action = irq_desc[i].action; |
| 49 | if (!action) |
| 50 | goto skip; |
| 51 | seq_printf(p, "%3d: ",i); |
| 52 | #ifndef CONFIG_SMP |
| 53 | seq_printf(p, "%10u ", kstat_irqs(i)); |
| 54 | #else |
| 55 | for (j = 0; j < NR_CPUS; j++) |
| 56 | if (cpu_online(j)) |
| 57 | seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); |
| 58 | #endif |
| 59 | seq_printf(p, " %14s", irq_desc[i].handler->typename); |
| 60 | seq_printf(p, " %s", action->name); |
| 61 | |
| 62 | for (action=action->next; action; action = action->next) |
| 63 | seq_printf(p, ", %s", action->name); |
| 64 | |
| 65 | seq_putc(p, '\n'); |
| 66 | skip: |
| 67 | spin_unlock_irqrestore(&irq_desc[i].lock, flags); |
| 68 | } else if (i == NR_IRQS) { |
| 69 | seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count)); |
| 70 | seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count)); |
| 71 | } |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * do_IRQ handles all normal device IRQ's (the special |
| 77 | * SMP cross-CPU interrupts have their own specific |
| 78 | * handlers). |
| 79 | */ |
| 80 | asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs) |
| 81 | { |
| 82 | irq_enter(); |
| 83 | |
| 84 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
| 85 | /* FIXME M32R */ |
| 86 | #endif |
| 87 | __do_IRQ(irq, regs); |
| 88 | irq_exit(); |
| 89 | |
| 90 | return 1; |
| 91 | } |