irq.c

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/*
 *  Copyright (C) 2004 Florian Schirmer <[email protected]>
 *
 *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/irq_cpu.h>
#include <bcm47xx.h>

void plat_irq_dispatch(void)
{
    u32 cause;

    cause = read_c0_cause() & read_c0_status() & CAUSEF_IP;

    clear_c0_status(cause);

    if (cause & CAUSEF_IP7)
        do_IRQ(7);
    if (cause & CAUSEF_IP2)
        do_IRQ(2);
    if (cause & CAUSEF_IP3)
        do_IRQ(3);
    if (cause & CAUSEF_IP4)
        do_IRQ(4);
    if (cause & CAUSEF_IP5)
        do_IRQ(5);
    if (cause & CAUSEF_IP6)
        do_IRQ(6);
}

void __init arch_init_irq(void)
{
#ifdef CONFIG_BCM47XX_BCMA
    if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
        bcma_write32(bcm47xx_bus.bcma.bus.drv_mips.core,
                 BCMA_MIPS_MIPS74K_INTMASK(5), 1 << 31);
        /*
         * the kernel reads the timer irq from some register and thinks
         * it's #5, but we offset it by 2 and route to #7
         */
        cp0_compare_irq = 7;
    }
#endif
    mips_cpu_irq_init();
}