1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
 4 */
 5
 6#include <linux/interrupt.h>
 7#include <linux/irqchip.h>
 8#include <asm/mach_desc.h>
 9#include <asm/smp.h>
10
11/*
12 * Late Interrupt system init called from start_kernel for Boot CPU only
13 *
14 * Since slab must already be initialized, platforms can start doing any
15 * needed request_irq( )s
16 */
17void __init init_IRQ(void)
18{
19	/*
20	 * process the entire interrupt tree in one go
21	 * Any external intc will be setup provided DT chains them
22	 * properly
23	 */
24	irqchip_init();
25
26#ifdef CONFIG_SMP
27	/* a SMP H/w block could do IPI IRQ request here */
28	if (plat_smp_ops.init_per_cpu)
29		plat_smp_ops.init_per_cpu(smp_processor_id());
30#endif
31
32	if (machine_desc->init_per_cpu)
33		machine_desc->init_per_cpu(smp_processor_id());
34}
35
36/*
37 * "C" Entry point for any ARC ISR, called from low level vector handler
38 * @irq is the vector number read from ICAUSE reg of on-chip intc
39 */
40void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
41{
42	handle_domain_irq(NULL, hwirq, regs);
43}