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/******************************************************************************
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*                                                                             *
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* License Agreement                                                           *
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*                                                                             *
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* Copyright (c) 2008 Altera Corporation, San Jose, California, USA.           *
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* All rights reserved.                                                        *
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*                                                                             *
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* Permission is hereby granted, free of charge, to any person obtaining a     *
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* copy of this software and associated documentation files (the "Software"),  *
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* to deal in the Software without restriction, including without limitation   *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,    *
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* and/or sell copies of the Software, and to permit persons to whom the       *
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* Software is furnished to do so, subject to the following conditions:        *
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*                                                                             *
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* The above copyright notice and this permission notice shall be included in  *
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* all copies or substantial portions of the Software.                         *
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*                                                                             *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *
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* DEALINGS IN THE SOFTWARE.                                                   *
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*                                                                             *
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* This agreement shall be governed in all respects by the laws of the State   *
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* of California and by the laws of the United States of America.              *
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*                                                                             *
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* Altera does not recommend, suggest or require that this reference design    *
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* file be used in conjunction or combination with any other product.          *
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******************************************************************************/
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#include "sys/alt_exceptions.h"
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#include "alt_types.h"
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#include "system.h"
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/*
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 * This file implements support for calling user-registered handlers for
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 * instruction-generated exceptions.
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 *
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 * The registry API is optionally enabled through the "Enable
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 * Instruction-related Exception API" HAL BSP setting, which will
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 * define the macro below.
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 */
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#ifdef ALT_INCLUDE_INSTRUCTION_RELATED_EXCEPTION_API
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/*
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 * The header, alt_exception_handler_registry.h contains a struct describing
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 * the registered exception handler
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 */
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#include "priv/alt_exception_handler_registry.h"
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/*
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 * Pull in the exception entry assembly code. This will not be linked in
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 * unless this object is linked into the executable (i.e. only if
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 * alt_instruction_exception_register() is called).
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 */
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__asm__( "\n\t.globl alt_exception" );
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/*
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 * alt_instruction_exception_register() is called to register a handler to
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 * service instruction-generated exceptions that are not handled by the
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 * default exception handler code (interrupts, and optionally unimplemented
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 * instructions and traps).
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 *
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 * Passing null (0x0) in the handler argument will disable a previously-
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 * registered handler.
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 *
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 * Note that if no handler is registered, exceptions that are not processed
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 * using the built-in handler (interrupts, and optionally unimplemented
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 * instructions and traps) are treated as unknown exceptions, resulting
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 * in either a break or an infinite loop.
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 */
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void alt_instruction_exception_register (
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  alt_exception_result (*exception_handler)(
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    alt_exception_cause cause,
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    alt_u32 exception_pc,
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    alt_u32 bad_addr) )
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{
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  alt_instruction_exception_handler = exception_handler;
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}
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#endif /* ALT_INCLUDE_INSTRUCTION_RELATED_EXCEPTION_API */

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