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 21 #include <asm/prom.h> 22 23 unsigned int irq_of_parse_and_map(struct device_node *dev, int index) 24 { 25 struct of_irq oirq; 26 27 if (of_irq_map_one(dev, index, &oirq)) 28 return NO_IRQ; 29 30 return oirq.specifier[0]; 31 } 32 EXPORT_SYMBOL_GPL(irq_of_parse_and_map); 33 34 static u32 concurrent_irq; 35 36 void __irq_entry do_IRQ(struct pt_regs *regs) 37 { 38 unsigned int irq; 39 struct pt_regs *old_regs = set_irq_regs(regs); 40 41 irq_enter(); 42 irq = get_irq(regs); 43 next_irq: 44 BUG_ON(irq == -1U); 45 generic_handle_irq(irq); 46 47 irq = get_irq(regs); 48 if (irq != -1U) { 49 pr_debug("next irq: %d\n", irq); 50 ++concurrent_irq; 51 goto next_irq; 52 } 53 54 irq_exit(); 55 set_irq_regs(old_regs); 56 } 57 58 int show_interrupts(struct seq_file *p, void *v) 59 { 60 int i = *(loff_t *) v, j; 61 struct irqaction *action; 62 unsigned long flags; 63 64 if (i == 0) { 65 seq_printf(p, " "); 66 for_each_online_cpu(j) 67 seq_printf(p, "CPU%-8d", j); 68 seq_putc(p, '\n'); 69 } 70 71 if (i < nr_irq) { 72 raw_spin_lock_irqsave(&irq_desc[i].lock, flags); 73 action = irq_desc[i].action; 74 if (!action) 75 goto skip; 76 seq_printf(p, "%3d: ", i); 77 #ifndef CONFIG_SMP 78 seq_printf(p, "%10u ", kstat_irqs(i)); 79 #else 80 for_each_online_cpu(j) 81 seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); 82 #endif 83 seq_printf(p, " %8s", irq_desc[i].status & 84 IRQ_LEVEL ? "level" : "edge"); 85 seq_printf(p, " %8s", irq_desc[i].chip->name); 86 seq_printf(p, " %s", action->name); 87 88 for (action = action->next; action; action = action->next) 89 seq_printf(p, ", %s", action->name); 90 91 seq_putc(p, '\n'); 92 skip: 93 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); 94 } 95 return 0; 96 } 97 98 /* MS: There is no any advance mapping mechanism. We are using simple 32bit 99 intc without any cascades or any connection that's why mapping is 1:1 */ 100 unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq) 101 { 102 return hwirq; 103 } 104 EXPORT_SYMBOL_GPL(irq_create_mapping); 105 106 unsigned int irq_create_of_mapping(struct device_node *controller, 107 u32 *intspec, unsigned int intsize) 108 { 109 return intspec[0]; 110 } 111 EXPORT_SYMBOL_GPL(irq_create_of_mapping); 112