1 files changed, 123 insertions, 0 deletions
diff --git a/sys/powerpc/aim/interrupt.c b/sys/powerpc/aim/interrupt.c
new file mode 100644
index 0000000..491f53d
--- /dev/null
+++ b/sys/powerpc/aim/interrupt.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2002 by Peter Grehan. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Interrupts are dispatched to here from locore asm
+ */
+
+#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/interrupt.h>
+#include <sys/kernel.h>
+#include <sys/kthread.h>
+#include <sys/ktr.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/mutex.h>
+#include <sys/proc.h>
+#include <sys/smp.h>
+#include <sys/unistd.h>
+#include <sys/vmmeter.h>
+
+#include <machine/cpu.h>
+#include <machine/db_machdep.h>
+#include <machine/fpu.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
+#include <machine/psl.h>
+#include <machine/trap.h>
+#include <machine/spr.h>
+#include <machine/sr.h>
+#include <machine/interruptvar.h>
+
+void powerpc_interrupt(struct trapframe *);
+
+u_long intrcnt[1];
+u_long eintrcnt[1];
+
+char intrnames[1];
+char eintrnames[1];
+
+/*
+ * External interrupt install routines
+ */
+static void (*powerpc_extintr_handler)(void);
+
+void
+ext_intr_install(void (*new_extint)(void))
+{
+	powerpc_extintr_handler = new_extint;
+}
+
+extern void	decr_intr(struct clockframe *);
+extern void	trap(struct trapframe *);
+
+/*
+ * A very short dispatch, to try and maximise assembler code use
+ * between all exception types. Maybe 'true' interrupts should go
+ * here, and the trap code can come in separately
+ */
+void
+powerpc_interrupt(struct trapframe *framep)
+{
+        struct thread *td;
+	struct clockframe ckframe;
+
+	td = curthread;
+
+	switch (framep->exc) {
+	case EXC_EXI:
+		atomic_add_int(&td->td_intr_nesting_level, 1);
+		(*powerpc_extintr_handler)();
+		atomic_subtract_int(&td->td_intr_nesting_level, 1);	
+		break;
+
+	case EXC_DECR:
+		atomic_add_int(&td->td_intr_nesting_level, 1);
+		ckframe.srr0 = framep->srr0;
+		ckframe.srr1 = framep->srr1;
+		decr_intr(&ckframe);
+		atomic_subtract_int(&td->td_intr_nesting_level, 1);	
+		break;
+
+	default:
+		/*
+		 * Re-enable interrupts and call the generic trap code
+		 */
+#if 0
+		printf("powerpc_interrupt: got trap\n");
+#endif
+		mtmsr(mfmsr() | PSL_EE);
+		isync();
+		trap(framep);
+	}	        
+}