| /* |
| * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> |
| * Copyright (C) 2007-2009 PetaLogix |
| * Copyright (C) 2006 Atmark Techno, Inc. |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/ftrace.h> |
| #include <linux/kernel.h> |
| #include <linux/hardirq.h> |
| #include <linux/interrupt.h> |
| #include <linux/irqflags.h> |
| #include <linux/seq_file.h> |
| #include <linux/kernel_stat.h> |
| #include <linux/irq.h> |
| #include <linux/of_irq.h> |
| |
| #include <asm/prom.h> |
| |
| static u32 concurrent_irq; |
| |
| void __irq_entry do_IRQ(struct pt_regs *regs) |
| { |
| unsigned int irq; |
| struct pt_regs *old_regs = set_irq_regs(regs); |
| trace_hardirqs_off(); |
| |
| irq_enter(); |
| irq = get_irq(regs); |
| next_irq: |
| BUG_ON(irq == -1U); |
| generic_handle_irq(irq); |
| |
| irq = get_irq(regs); |
| if (irq != -1U) { |
| pr_debug("next irq: %d\n", irq); |
| ++concurrent_irq; |
| goto next_irq; |
| } |
| |
| irq_exit(); |
| set_irq_regs(old_regs); |
| trace_hardirqs_on(); |
| } |
| |
| /* MS: There is no any advance mapping mechanism. We are using simple 32bit |
| intc without any cascades or any connection that's why mapping is 1:1 */ |
| unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq) |
| { |
| return hwirq; |
| } |
| EXPORT_SYMBOL_GPL(irq_create_mapping); |
| |
| unsigned int irq_create_of_mapping(struct device_node *controller, |
| const u32 *intspec, unsigned int intsize) |
| { |
| return intspec[0]; |
| } |
| EXPORT_SYMBOL_GPL(irq_create_of_mapping); |
