arch/openrisc/kernel/irq.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * OpenRISC irq.c
   4  *
   5  * Linux architectural port borrowing liberally from similar works of
   6  * others.  All original copyrights apply as per the original source
   7  * declaration.
   8  *
   9  * Modifications for the OpenRISC architecture:
  10  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11  */
  12
  13 #include <linux/interrupt.h>
  14 #include <linux/init.h>
  15 #include <linux/ftrace.h>
  16 #include <linux/irq.h>
  17 #include <linux/irqchip.h>
  18 #include <linux/export.h>
  19 #include <linux/irqflags.h>
  20
  21 /* read interrupt enabled status */
  22 unsigned long arch_local_save_flags(void)
  23 {
  24         return mfspr(SPR_SR) & (SPR_SR_IEE|SPR_SR_TEE);
  25 }
  26 EXPORT_SYMBOL(arch_local_save_flags);
  27
  28 /* set interrupt enabled status */
  29 void arch_local_irq_restore(unsigned long flags)
  30 {
  31         mtspr(SPR_SR, ((mfspr(SPR_SR) & ~(SPR_SR_IEE|SPR_SR_TEE)) | flags));
  32 }
  33 EXPORT_SYMBOL(arch_local_irq_restore);
  34
  35 void __init init_IRQ(void)
  36 {
  37         irqchip_init();
  38 }
  39
  40 void __irq_entry do_IRQ(struct pt_regs *regs)
  41 {
  42         handle_arch_irq(regs);
  43 }