Logo Search packages:      
Sourcecode: linux version File versions

irq.c

/*
 *  arch/mips/emma2rh/common/irq.c
 *      This file is common irq dispatcher.
 *
 *  Copyright (C) NEC Electronics Corporation 2005-2006
 *
 *  This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c
 *
 *    Copyright 2001 MontaVista Software Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/types.h>

#include <asm/system.h>
#include <asm/mipsregs.h>
#include <asm/debug.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>

#include <asm/emma2rh/emma2rh.h>

/*
 * the first level int-handler will jump here if it is a emma2rh irq
 */
void emma2rh_irq_dispatch(void)
{
      u32 intStatus;
      u32 bitmask;
      u32 i;

      intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_0)
          & emma2rh_in32(EMMA2RH_BHIF_INT_EN_0);

#ifdef EMMA2RH_SW_CASCADE
      if (intStatus &
          (1 << ((EMMA2RH_SW_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
            u32 swIntStatus;
            swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT)
                & emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
            for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
                  if (swIntStatus & bitmask) {
                        do_IRQ(EMMA2RH_SW_IRQ_BASE + i);
                        return;
                  }
            }
      }
#endif

      for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
            if (intStatus & bitmask) {
                  do_IRQ(EMMA2RH_IRQ_BASE + i);
                  return;
            }
      }

      intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_1)
          & emma2rh_in32(EMMA2RH_BHIF_INT_EN_1);

#ifdef EMMA2RH_GPIO_CASCADE
      if (intStatus &
          (1 << ((EMMA2RH_GPIO_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
            u32 gpioIntStatus;
            gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST)
                & emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
            for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
                  if (gpioIntStatus & bitmask) {
                        do_IRQ(EMMA2RH_GPIO_IRQ_BASE + i);
                        return;
                  }
            }
      }
#endif

      for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) {
            if (intStatus & bitmask) {
                  do_IRQ(EMMA2RH_IRQ_BASE + i);
                  return;
            }
      }

      intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_2)
          & emma2rh_in32(EMMA2RH_BHIF_INT_EN_2);

      for (i = 64, bitmask = 1; i < 96; i++, bitmask <<= 1) {
            if (intStatus & bitmask) {
                  do_IRQ(EMMA2RH_IRQ_BASE + i);
                  return;
            }
      }
}

Generated by  Doxygen 1.6.0   Back to index