Commit | Line | Data |
---|---|---|
fb9bd7d6 MZ |
1 | /* |
2 | * Based on arch/arm/kernel/irq.c | |
3 | * | |
4 | * Copyright (C) 1992 Linus Torvalds | |
5 | * Modifications for ARM processor Copyright (C) 1995-2000 Russell King. | |
6 | * Support for Dynamic Tick Timer Copyright (C) 2004-2005 Nokia Corporation. | |
7 | * Dynamic Tick Timer written by Tony Lindgren <tony@atomide.com> and | |
8 | * Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>. | |
9 | * Copyright (C) 2012 ARM Ltd. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
24 | #include <linux/kernel_stat.h> | |
25 | #include <linux/irq.h> | |
26 | #include <linux/smp.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/of_irq.h> | |
29 | #include <linux/seq_file.h> | |
30 | #include <linux/ratelimit.h> | |
31 | ||
32 | unsigned long irq_err_count; | |
33 | ||
34 | int arch_show_interrupts(struct seq_file *p, int prec) | |
35 | { | |
36 | #ifdef CONFIG_SMP | |
37 | show_ipi_list(p, prec); | |
38 | #endif | |
39 | seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count); | |
40 | return 0; | |
41 | } | |
42 | ||
43 | /* | |
44 | * handle_IRQ handles all hardware IRQ's. Decoded IRQs should | |
45 | * not come via this function. Instead, they should provide their | |
46 | * own 'handler'. Used by platform code implementing C-based 1st | |
47 | * level decoding. | |
48 | */ | |
49 | void handle_IRQ(unsigned int irq, struct pt_regs *regs) | |
50 | { | |
51 | struct pt_regs *old_regs = set_irq_regs(regs); | |
52 | ||
53 | irq_enter(); | |
54 | ||
55 | /* | |
56 | * Some hardware gives randomly wrong interrupts. Rather | |
57 | * than crashing, do something sensible. | |
58 | */ | |
59 | if (unlikely(irq >= nr_irqs)) { | |
60 | pr_warn_ratelimited("Bad IRQ%u\n", irq); | |
61 | ack_bad_irq(irq); | |
62 | } else { | |
63 | generic_handle_irq(irq); | |
64 | } | |
65 | ||
66 | irq_exit(); | |
67 | set_irq_regs(old_regs); | |
68 | } | |
69 | ||
70 | /* | |
71 | * Interrupt controllers supported by the kernel. | |
72 | */ | |
73 | static const struct of_device_id intctrl_of_match[] __initconst = { | |
74 | /* IRQ controllers { .compatible, .data } info to go here */ | |
75 | {} | |
76 | }; | |
77 | ||
78 | void __init init_IRQ(void) | |
79 | { | |
80 | of_irq_init(intctrl_of_match); | |
81 | ||
82 | if (!handle_arch_irq) | |
83 | panic("No interrupt controller found."); | |
84 | } |