1 /* 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 3 * Copyright (C) 2007-2009 PetaLogix 4 * Copyright (C) 2006 Atmark Techno, Inc. 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/hardirq.h> 14 #include <linux/interrupt.h> 15 #include <linux/irqflags.h> 16 #include <linux/seq_file.h> 17 #include <linux/kernel_stat.h> 18 #include <linux/irq.h> 19 20 #include <asm/prom.h> 21 22 unsigned int irq_of_parse_and_map(struct device_node *dev, int index) 23 { 24 struct of_irq oirq; 25 26 if (of_irq_map_one(dev, index, &oirq)) 27 return NO_IRQ; 28 29 return oirq.specifier[0]; 30 } 31 EXPORT_SYMBOL_GPL(irq_of_parse_and_map); 32 33 static u32 concurrent_irq; 34 35 void do_IRQ(struct pt_regs *regs) 36 { 37 unsigned int irq; 38 struct pt_regs *old_regs = set_irq_regs(regs); 39 40 irq_enter(); 41 irq = get_irq(regs); 42 next_irq: 43 BUG_ON(irq == -1U); 44 generic_handle_irq(irq); 45 46 irq = get_irq(regs); 47 if (irq != -1U) { 48 pr_debug("next irq: %d\n", irq); 49 ++concurrent_irq; 50 goto next_irq; 51 } 52 53 irq_exit(); 54 set_irq_regs(old_regs); 55 } 56 57 int show_interrupts(struct seq_file *p, void *v) 58 { 59 int i = *(loff_t *) v, j; 60 struct irqaction *action; 61 unsigned long flags; 62 63 if (i == 0) { 64 seq_printf(p, " "); 65 for_each_online_cpu(j) 66 seq_printf(p, "CPU%-8d", j); 67 seq_putc(p, '\n'); 68 } 69 70 if (i < nr_irq) { 71 raw_spin_lock_irqsave(&irq_desc[i].lock, flags); 72 action = irq_desc[i].action; 73 if (!action) 74 goto skip; 75 seq_printf(p, "%3d: ", i); 76 #ifndef CONFIG_SMP 77 seq_printf(p, "%10u ", kstat_irqs(i)); 78 #else 79 for_each_online_cpu(j) 80 seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); 81 #endif 82 seq_printf(p, " %8s", irq_desc[i].status & 83 IRQ_LEVEL ? "level" : "edge"); 84 seq_printf(p, " %8s", irq_desc[i].chip->name); 85 seq_printf(p, " %s", action->name); 86 87 for (action = action->next; action; action = action->next) 88 seq_printf(p, ", %s", action->name); 89 90 seq_putc(p, '\n'); 91 skip: 92 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); 93 } 94 return 0; 95 } 96