LXR linux/arch/arc/kernel/irq.c

   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}
  44