root/arch/sh/kernel/cpu/sh4a/intc-shx3.c

DEFINITIONS

1. irq_lookup
2. irq_finish
3. shx3_irq_setup

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Shared support for SH-X3 interrupt controllers.
   4  *
   5  *  Copyright (C) 2009 - 2010  Paul Mundt
   6  */
   7 #include <linux/irq.h>
   8 #include <linux/io.h>
   9 #include <linux/init.h>
  10 
  11 #define INTACK          0xfe4100b8
  12 #define INTACKCLR       0xfe4100bc
  13 #define INTC_USERIMASK  0xfe411000
  14 
  15 #ifdef CONFIG_INTC_BALANCING
  16 unsigned int irq_lookup(unsigned int irq)
  17 {
  18         return __raw_readl(INTACK) & 1 ? irq : NO_IRQ_IGNORE;
  19 }
  20 
  21 void irq_finish(unsigned int irq)
  22 {
  23         __raw_writel(irq2evt(irq), INTACKCLR);
  24 }
  25 #endif
  26 
  27 static int __init shx3_irq_setup(void)
  28 {
  29         return register_intc_userimask(INTC_USERIMASK);
  30 }
  31 arch_initcall(shx3_irq_setup);