2 * Common tx4927 irq handler
4 * Author: MontaVista Software, Inc.
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
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14 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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20 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/init.h>
27 #include <linux/interrupt.h>
28 #include <asm/irq_cpu.h>
29 #include <asm/mipsregs.h>
30 #ifdef CONFIG_TOSHIBA_RBTX4927
31 #include <asm/txx9/rbtx4927.h>
34 void __init tx4927_irq_init(void)
37 txx9_irq_init(TX4927_IRC_REG);
38 set_irq_chained_handler(TX4927_IRQ_NEST_PIC_ON_CP0, handle_simple_irq);
41 asmlinkage void plat_irq_dispatch(void)
43 unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
45 if (pending & STATUSF_IP7) /* cpu timer */
46 do_IRQ(TX4927_IRQ_CPU_TIMER);
47 else if (pending & STATUSF_IP2) { /* tx4927 pic */
49 #ifdef CONFIG_TOSHIBA_RBTX4927
50 if (irq == TX4927_IRQ_NEST_EXT_ON_PIC)
51 irq = toshiba_rbtx4927_irq_nested(irq);
53 if (unlikely(irq < 0)) {
58 } else if (pending & STATUSF_IP0) /* user line 0 */
59 do_IRQ(TX4927_IRQ_USER0);
60 else if (pending & STATUSF_IP1) /* user line 1 */
61 do_IRQ(TX4927_IRQ_USER1);