52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqchip.h>
|
|
#include <asm/mach_desc.h>
|
|
|
|
#include <asm/irq_regs.h>
|
|
#include <asm/smp.h>
|
|
|
|
/*
|
|
* Late Interrupt system init called from start_kernel for Boot CPU only
|
|
*
|
|
* Since slab must already be initialized, platforms can start doing any
|
|
* needed request_irq( )s
|
|
*/
|
|
void __init init_IRQ(void)
|
|
{
|
|
/*
|
|
* process the entire interrupt tree in one go
|
|
* Any external intc will be setup provided DT chains them
|
|
* properly
|
|
*/
|
|
irqchip_init();
|
|
|
|
#ifdef CONFIG_SMP
|
|
/* a SMP H/w block could do IPI IRQ request here */
|
|
if (plat_smp_ops.init_per_cpu)
|
|
plat_smp_ops.init_per_cpu(smp_processor_id());
|
|
#endif
|
|
|
|
if (machine_desc->init_per_cpu)
|
|
machine_desc->init_per_cpu(smp_processor_id());
|
|
}
|
|
|
|
/*
|
|
* "C" Entry point for any ARC ISR, called from low level vector handler
|
|
* @irq is the vector number read from ICAUSE reg of on-chip intc
|
|
*/
|
|
void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
|
|
{
|
|
struct pt_regs *old_regs;
|
|
|
|
irq_enter();
|
|
old_regs = set_irq_regs(regs);
|
|
generic_handle_domain_irq(NULL, hwirq);
|
|
set_irq_regs(old_regs);
|
|
irq_exit();
|
|
}
|