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[/] [ao486/] [trunk/] [syn/] [soc/] [firmware/] [exe_bsp/] [HAL/] [src/] [alt_ecc_fatal_exception.c] - Rev 2
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/****************************************************************************** * * * License Agreement * * * * Copyright (c) 2013 Altera Corporation, San Jose, California, USA. * * All rights reserved. * * * * 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. * * * * This agreement shall be governed in all respects by the laws of the State * * of California and by the laws of the United States of America. * * * * Altera does not recommend, suggest or require that this reference design * * file be used in conjunction or combination with any other product. * ******************************************************************************/ #include "io.h" #include "sys/alt_exceptions.h" /* * This file implements support for calling a user-registered handler * when a likely fatal ECC error exception occurs. */ /* * Global variable containing address to jump to when likely fatal * ECC error exception occurs. */ alt_u32 alt_exception_ecc_fatal_handler = 0x0; /* * Pull in the exception entry assembly code. This will not be linked in * unless this object is linked into the executable (i.e. only if * alt_ecc_fatal_exception_register() is called). */ __asm__( "\n\t.globl alt_exception" ); /* * alt_ecc_fatal_exception_register() is called to register a handler to * service likely fatal ECC error exceptions. * * Passing null (0x0) in the handler argument will disable a previously- * registered handler. * * Note that if no handler is registered, just normal exception processing * occurs on a likely fatal ECC exception and the exception processing * code might trigger an infinite exception loop. */ void alt_ecc_fatal_exception_register(alt_u32 handler) { /* * Use IOWR to make sure this bypasses the data cache. * This is required because the exception handler uses ldwio * to read this value. */ IOWR(&alt_exception_ecc_fatal_handler, 0, handler); }