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#include <linux/irqchip.h>
21#include <linux/of_irq.h>
22
 
 
23static u32 concurrent_irq;
24
25void __irq_entry do_IRQ(struct pt_regs *regs)
26{
27	unsigned int irq;
28	struct pt_regs *old_regs = set_irq_regs(regs);
29	trace_hardirqs_off();
30
31	irq_enter();
32	irq = xintc_get_irq();
33next_irq:
34	BUG_ON(!irq);
35	generic_handle_irq(irq);
36
37	irq = xintc_get_irq();
38	if (irq != -1U) {
39		pr_debug("next irq: %d\n", irq);
40		++concurrent_irq;
41		goto next_irq;
42	}
43
44	irq_exit();
45	set_irq_regs(old_regs);
46	trace_hardirqs_on();
47}
48
49void __init init_IRQ(void)
 
 
 
 
 
 
 
 
 
50{
51	/* process the entire interrupt tree in one go */
52	irqchip_init();
53}

 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#include <linux/of_irq.h>
21
22#include <asm/prom.h>
23
24static u32 concurrent_irq;
25
26void __irq_entry do_IRQ(struct pt_regs *regs)
27{
28	unsigned int irq;
29	struct pt_regs *old_regs = set_irq_regs(regs);
30	trace_hardirqs_off();
31
32	irq_enter();
33	irq = get_irq(regs);
34next_irq:
35	BUG_ON(irq == -1U);
36	generic_handle_irq(irq);
37
38	irq = get_irq(regs);
39	if (irq != -1U) {
40		pr_debug("next irq: %d\n", irq);
41		++concurrent_irq;
42		goto next_irq;
43	}
44
45	irq_exit();
46	set_irq_regs(old_regs);
47	trace_hardirqs_on();
48}
49
50/* MS: There is no any advance mapping mechanism. We are using simple 32bit
51  intc without any cascades or any connection that's why mapping is 1:1 */
52unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
53{
54	return hwirq;
55}
56EXPORT_SYMBOL_GPL(irq_create_mapping);
57
58unsigned int irq_create_of_mapping(struct device_node *controller,
59				   const u32 *intspec, unsigned int intsize)
60{
61	return intspec[0];
 
62}
63EXPORT_SYMBOL_GPL(irq_create_of_mapping);