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 */
  26 unsigned long arch_local_save_flags(void)
  27 {
  28         return mfspr(SPR_SR) & (SPR_SR_IEE|SPR_SR_TEE);
  29 }
  30 EXPORT_SYMBOL(arch_local_save_flags);
  31
  32 /* set interrupt enabled status */
  33 void arch_local_irq_restore(unsigned long flags)
  34 {
  35         mtspr(SPR_SR, ((mfspr(SPR_SR) & ~(SPR_SR_IEE|SPR_SR_TEE)) | flags));
  36 }
  37 EXPORT_SYMBOL(arch_local_irq_restore);
  38
  39 void __init init_IRQ(void)
  40 {
  41         irqchip_init();
  42 }
  43
  44 static void (*handle_arch_irq)(struct pt_regs *);
  45
  46 void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
  47 {
  48         handle_arch_irq = handle_irq;
  49 }
  50
  51 void __irq_entry do_IRQ(struct pt_regs *regs)
  52 {
  53         handle_arch_irq(regs);
  54 }