Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 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> |
Steven J. Magnani | e6d7961 | 2010-04-12 16:01:36 -0500 | [diff] [blame] | 12 | #include <linux/ftrace.h> |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 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> |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 20 | #include <linux/of_irq.h> |
Paul Gortmaker | 66421a6 | 2011-09-22 11:22:55 -0400 | [diff] [blame] | 21 | #include <linux/export.h> |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 22 | |
| 23 | #include <asm/prom.h> |
| 24 | |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 25 | static u32 concurrent_irq; |
| 26 | |
Steven J. Magnani | e6d7961 | 2010-04-12 16:01:36 -0500 | [diff] [blame] | 27 | void __irq_entry do_IRQ(struct pt_regs *regs) |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 28 | { |
| 29 | unsigned int irq; |
| 30 | struct pt_regs *old_regs = set_irq_regs(regs); |
Michal Simek | 0d9ec76 | 2010-05-25 13:44:38 +0200 | [diff] [blame] | 31 | trace_hardirqs_off(); |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 32 | |
| 33 | irq_enter(); |
Grant Likely | 2462bac | 2012-01-26 14:10:13 -0700 | [diff] [blame] | 34 | irq = get_irq(); |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 35 | next_irq: |
Michal Simek | 6c7a267 | 2011-12-09 10:45:20 +0100 | [diff] [blame] | 36 | BUG_ON(!irq); |
Grant Likely | 2462bac | 2012-01-26 14:10:13 -0700 | [diff] [blame] | 37 | generic_handle_irq(irq); |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 38 | |
Grant Likely | 2462bac | 2012-01-26 14:10:13 -0700 | [diff] [blame] | 39 | irq = get_irq(); |
| 40 | if (irq != -1U) { |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 41 | pr_debug("next irq: %d\n", irq); |
| 42 | ++concurrent_irq; |
| 43 | goto next_irq; |
| 44 | } |
| 45 | |
| 46 | irq_exit(); |
| 47 | set_irq_regs(old_regs); |
Michal Simek | 0d9ec76 | 2010-05-25 13:44:38 +0200 | [diff] [blame] | 48 | trace_hardirqs_on(); |
Michal Simek | eedbdab | 2009-03-27 14:25:49 +0100 | [diff] [blame] | 49 | } |