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

   1 /*
   2  * Shared support for SH-X3 interrupt controllers.
   3  *
   4  *  Copyright (C) 2009 - 2010  Paul Mundt
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10 #include <linux/irq.h>
  11 #include <linux/io.h>
  12 #include <linux/init.h>
  13
  14 #define INTACK          0xfe4100b8
  15 #define INTACKCLR       0xfe4100bc
  16 #define INTC_USERIMASK  0xfe411000
  17
  18 #ifdef CONFIG_INTC_BALANCING
  19 unsigned int irq_lookup(unsigned int irq)
  20 {
  21         return __raw_readl(INTACK) & 1 ? irq : NO_IRQ_IGNORE;
  22 }
  23
  24 void irq_finish(unsigned int irq)
  25 {
  26         __raw_writel(irq2evt(irq), INTACKCLR);
  27 }
  28 #endif
  29
  30 static int __init shx3_irq_setup(void)
  31 {
  32         return register_intc_userimask(INTC_USERIMASK);
  33 }
  34 arch_initcall(shx3_irq_setup);