| /* |
| * 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> |
| #include <asm/tx4927/tx4927.h> |
| #ifdef CONFIG_TOSHIBA_RBTX4927 |
| #include <asm/tx4927/toshiba_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(); |
| } |