/* sysFatalErrorHandler - common system fatal error handler */

/*
 * Copyright (c) 2013-2014 Wind River Systems, Inc.
 *
 * 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) Neither the name of Wind River Systems nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
 */

/*
DESCRIPTION
This module provides the _SysFatalErrorHandler() routine which is common to
supported BSPs.
*/

#include <nanokernel.h>
#include <toolchain.h>
#include <sections.h>

#ifdef CONFIG_PRINTK
#include <misc/printk.h>
#define PRINTK(...) printk(__VA_ARGS__)
#else
#define PRINTK(...)
#endif /* CONFIG_PRINTK */

/*******************************************************************************
*
* _SysFatalErrorHandler - fatal error handler
*
* This routine implements the corrective action to be taken when the system
* detects a fatal error.
*
* This sample implementation attempts to abort the current context and allow
* the system to continue executing, which may permit the system to continue
* functioning with degraded capabilities.
*
* System designers may wish to enhance or substitute this sample
* implementation to take other actions, such as logging error (or debug)
* information to a persistent repository and/or rebooting the system.
*
* RETURNS: This function does not return.
*
* \NOMANUAL
*/

FUNC_NORETURN void _SysFatalErrorHandler(
	unsigned int reason, /* fatal error reason */
	const NANO_ESF * pEsf /* pointer to exception stack frame */
	)
{
	nano_context_type_t curCtx = context_type_get();

	ARG_UNUSED(reason);
	ARG_UNUSED(pEsf);

	if ((curCtx != NANO_CTX_ISR) && !_context_essential_check(NULL)) {
#ifdef CONFIG_MICROKERNEL
		if (curCtx == NANO_CTX_TASK) {
			extern FUNC_NORETURN void _TaskAbort(void);
			PRINTK("Fatal task error! Aborting task.\n");
			_TaskAbort();
		} else
#endif /* CONFIG_MICROKERNEL */
		{
			PRINTK("Fatal fiber error! Aborting fiber.\n");
			fiber_abort();
		}
	} else {
#ifdef CONFIG_PRINTK
		/*
		 * Conditionalize the ctxText[] definition to prevent an "unused
		 * variable" warning when the PRINTK kconfig option is disabled.
		 */

		static char *ctxText[] = {"ISR", "essential fiber",
					  "essential task"};

		PRINTK("Fatal %s error! Spinning...\n", ctxText[curCtx]);
#endif /* CONFIG_PRINTK */
	}

	do {
	} while (1);
}