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/ftrace.h> 13#include <linux/kernel.h> 14#include <linux/hardirq.h> 15#include <linux/interrupt.h> 16#include <linux/irqflags.h> 17#include <linux/seq_file.h> 18#include <linux/kernel_stat.h> 19#include <linux/irq.h> 20#include <linux/of_irq.h> 21 22#include <asm/prom.h> 23 24static u32 concurrent_irq; 25 26void __irq_entry do_IRQ(struct pt_regs *regs) 27{ 28 unsigned int irq; 29 struct pt_regs *old_regs = set_irq_regs(regs); 30 trace_hardirqs_off(); 31 32 irq_enter(); 33 irq = get_irq(regs); 34next_irq: 35 BUG_ON(irq == -1U); 36 generic_handle_irq(irq); 37 38 irq = get_irq(regs); 39 if (irq != -1U) { 40 pr_debug("next irq: %d\n", irq); 41 ++concurrent_irq; 42 goto next_irq; 43 } 44 45 irq_exit(); 46 set_irq_regs(old_regs); 47 trace_hardirqs_on(); 48} 49 50int show_interrupts(struct seq_file *p, void *v) 51{ 52 int i = *(loff_t *) v, j; 53 struct irqaction *action; 54 unsigned long flags; 55 56 if (i == 0) { 57 seq_printf(p, " "); 58 for_each_online_cpu(j) 59 seq_printf(p, "CPU%-8d", j); 60 seq_putc(p, '\n'); 61 } 62 63 if (i < nr_irq) { 64 raw_spin_lock_irqsave(&irq_desc[i].lock, flags); 65 action = irq_desc[i].action; 66 if (!action) 67 goto skip; 68 seq_printf(p, "%3d: ", i); 69#ifndef CONFIG_SMP 70 seq_printf(p, "%10u ", kstat_irqs(i)); 71#else 72 for_each_online_cpu(j) 73 seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); 74#endif 75 seq_printf(p, " %8s", irq_desc[i].status & 76 IRQ_LEVEL ? "level" : "edge"); 77 seq_printf(p, " %8s", irq_desc[i].chip->name); 78 seq_printf(p, " %s", action->name); 79 80 for (action = action->next; action; action = action->next) 81 seq_printf(p, ", %s", action->name); 82 83 seq_putc(p, '\n'); 84skip: 85 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); 86 } 87 return 0; 88} 89 90/* MS: There is no any advance mapping mechanism. We are using simple 32bit 91 intc without any cascades or any connection that's why mapping is 1:1 */ 92unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq) 93{ 94 return hwirq; 95} 96EXPORT_SYMBOL_GPL(irq_create_mapping); 97 98unsigned int irq_create_of_mapping(struct device_node *controller, 99 const u32 *intspec, unsigned int intsize) 100{ 101 return intspec[0]; 102} 103EXPORT_SYMBOL_GPL(irq_create_of_mapping); 104