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

   1/*
   2 * OpenRISC irq.c
   3 *
   4 * Linux architectural port borrowing liberally from similar works of
   5 * others.  All original copyrights apply as per the original source
   6 * declaration.
   7 *
   8 * Modifications for the OpenRISC architecture:
   9 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  10 *
  11 *      This program is free software; you can redistribute it and/or
  12 *      modify it under the terms of the GNU General Public License
  13 *      as published by the Free Software Foundation; either version
  14 *      2 of the License, or (at your option) any later version.
  15 */
  16
  17#include <linux/interrupt.h>
  18#include <linux/init.h>
  19#include <linux/ftrace.h>
  20#include <linux/irq.h>
  21#include <linux/irqchip.h>
  22#include <linux/export.h>
  23#include <linux/irqflags.h>
  24
  25/* read interrupt enabled status */
  26unsigned long arch_local_save_flags(void)
  27{
  28        return mfspr(SPR_SR) & (SPR_SR_IEE|SPR_SR_TEE);
  29}
  30EXPORT_SYMBOL(arch_local_save_flags);
  31
  32/* set interrupt enabled status */
  33void arch_local_irq_restore(unsigned long flags)
  34{
  35        mtspr(SPR_SR, ((mfspr(SPR_SR) & ~(SPR_SR_IEE|SPR_SR_TEE)) | flags));
  36}
  37EXPORT_SYMBOL(arch_local_irq_restore);
  38
  39void __init init_IRQ(void)
  40{
  41        irqchip_init();
  42}
  43
  44static void (*handle_arch_irq)(struct pt_regs *);
  45
  46void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
  47{
  48        handle_arch_irq = handle_irq;
  49}
  50
  51void __irq_entry do_IRQ(struct pt_regs *regs)
  52{
  53        handle_arch_irq(regs);
  54}
  55