microblaze: use the generic ack_bad_irq implementation
[linux-2.6.git] / arch / microblaze / kernel / irq.c
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                 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                 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
93         }
94         return 0;
95 }