1/*
 2 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License version 2 as
 6 * published by the Free Software Foundation.
 7 *
 8 */
 9
10#include <linux/interrupt.h>
11#include <linux/irqchip.h>
12#include <asm/mach_desc.h>
13#include <asm/smp.h>
14
15/*
16 * Late Interrupt system init called from start_kernel for Boot CPU only
17 *
18 * Since slab must already be initialized, platforms can start doing any
19 * needed request_irq( )s
20 */
21void __init init_IRQ(void)
22{
23	/*
24	 * process the entire interrupt tree in one go
25	 * Any external intc will be setup provided DT chains them
26	 * properly
27	 */
28	irqchip_init();
29
30#ifdef CONFIG_SMP
31	/* a SMP H/w block could do IPI IRQ request here */
32	if (plat_smp_ops.init_per_cpu)
33		plat_smp_ops.init_per_cpu(smp_processor_id());
34
35	if (machine_desc->init_per_cpu)
36		machine_desc->init_per_cpu(smp_processor_id());
37#endif
38}
39
40/*
41 * "C" Entry point for any ARC ISR, called from low level vector handler
42 * @irq is the vector number read from ICAUSE reg of on-chip intc
43 */
44void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
45{
46	handle_domain_irq(NULL, hwirq, regs);
47}