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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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