+// int-vector.S - Interrupt Vector Template (for levels > 1)
+// $Id: //depot/rel/Cottonwood/Xtensa/OS/xtos/int-vector.S#3 $
+
+// Copyright (c) 2003-2004, 2006, 2010 Tensilica Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+// To use this template file, define a macro called _INTERRUPT_LEVEL
+// to be the interrupt level of the vector, include "xtos-internal.h",
+// then include this file. We use the same template for both high-level
+// and medium-level interrupts, but not debug level.
+
+
+#define _ASMLANGUAGE
+#include "xtos-internal.h"
+#include <xtensa/config/system.h>
+
+
+#if XCHAL_HAVE_INTERRUPTS && (_INTERRUPT_LEVEL <= XCHAL_NUM_INTLEVELS) && (_INTERRUPT_LEVEL != XCHAL_DEBUGLEVEL)
+
+ .begin literal_prefix LABEL(.Level,InterruptVector)
+ .section LABEL(.Level,InterruptVector.text), "ax"
+ .align 4
+ .global LABEL(_Level,Vector)
+LABEL(_Level,Vector):
+ // Medium and high priority interrupt vector:
+
+# if HAVE_XSR
+ // With XSR, we can use this vector which has the advantage of being ROMable
+ // without requiring the handler to also be in ROM; however, it requires
+ // initializing the EXCSAVEn register (see ResetEpilog.S) and a slightly
+ // different save/restore sequence in the handler:
+ xsr a2, EXCSAVE_LEVEL
+ jx a2
+
+ // Pull-in the real handler by reference, to ensure the reset epilog gets it:
+ .global LABEL(_Level,FromVector)
+
+# else
+ wsr a2, EXCSAVE_LEVEL
+ movi a2, LABEL(_Level,FromVector)
+ jx a2
+# endif
+
+ .size LABEL(_Level,Vector), . - LABEL(_Level,Vector)
+ .text
+ .end literal_prefix
+
+#endif /* interrupt at that level */
+