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Diffstat (limited to 'arch/mips/txx9/generic/irq_tx4927.c')
-rw-r--r--arch/mips/txx9/generic/irq_tx4927.c64
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 000000000000..685ecc2ed551
--- /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();
+}
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