arch/riscv/kernel/irq.c

   1 /*
   2  * Copyright (C) 2012 Regents of the University of California
   3  * Copyright (C) 2017 SiFive
   4  *
   5  *   This program is free software; you can redistribute it and/or
   6  *   modify it under the terms of the GNU General Public License
   7  *   as published by the Free Software Foundation, version 2.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  */
  14
  15 #include <linux/interrupt.h>
  16 #include <linux/irqchip.h>
  17 #include <linux/irqdomain.h>
  18
  19 #ifdef CONFIG_RISCV_INTC
  20 #include <linux/irqchip/irq-riscv-intc.h>
  21 #endif
  22
  23 void __init init_IRQ(void)
  24 {
  25         irqchip_init();
  26 }
  27
  28 asmlinkage void __irq_entry do_IRQ(unsigned int cause, struct pt_regs *regs)
  29 {
  30 #ifdef CONFIG_RISCV_INTC
  31         /*
  32          * FIXME: We don't want a direct call to riscv_intc_irq here.  The plan
  33          * is to put an IRQ domain here and let the interrupt controller
  34          * register with that, but I poked around the arm64 code a bit and
  35          * there might be a better way to do it (ie, something fully generic).
  36          */
  37         riscv_intc_irq(cause, regs);
  38 #endif
  39 }