diff options
Diffstat (limited to 'arch/mips/txx9/generic/irq_tx4927.c')
| -rw-r--r-- | arch/mips/txx9/generic/irq_tx4927.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/irq_tx4927.c b/arch/mips/txx9/generic/irq_tx4927.c new file mode 100644 index 0000000..685ecc2 --- /dev/null +++ b/arch/mips/txx9/generic/irq_tx4927.c @@ -0,0 +1,64 @@ +/* + * Common tx4927 irq handler + * + * Author: MontaVista Software, Inc. + * source@mvista.com + * + * 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/init.h> +#include <linux/interrupt.h> +#include <asm/irq_cpu.h> +#include <asm/mipsregs.h> +#ifdef CONFIG_TOSHIBA_RBTX4927 +#include <asm/txx9/rbtx4927.h> +#endif + +void __init tx4927_irq_init(void) +{ + mips_cpu_irq_init(); + txx9_irq_init(TX4927_IRC_REG); + set_irq_chained_handler(TX4927_IRQ_NEST_PIC_ON_CP0, handle_simple_irq); +} + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; + + if (pending & STATUSF_IP7) /* cpu timer */ + do_IRQ(TX4927_IRQ_CPU_TIMER); + else if (pending & STATUSF_IP2) { /* tx4927 pic */ + int irq = txx9_irq(); +#ifdef CONFIG_TOSHIBA_RBTX4927 + if (irq == TX4927_IRQ_NEST_EXT_ON_PIC) + irq = toshiba_rbtx4927_irq_nested(irq); +#endif + if (unlikely(irq < 0)) { + spurious_interrupt(); + return; + } + do_IRQ(irq); + } else if (pending & STATUSF_IP0) /* user line 0 */ + do_IRQ(TX4927_IRQ_USER0); + else if (pending & STATUSF_IP1) /* user line 1 */ + do_IRQ(TX4927_IRQ_USER1); + else + spurious_interrupt(); +} |
