arch/arm: Move sysFatalErrorHandler.c from 'bsp' to 'core'

Moves (and renames) sysFatalErrorHandler.c out of the 'bsp' directory and
into 'core' as a step towards removing the directory 'arch/arm/bsp'.

Change-Id: Ie10aa2099f07380e4583dbbd32cdda917b4999ba
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>

arch/arm/core/Makefile

@@ -8,6 +8,6 @@ obj-y = atomic.o exc_exit.o ffs.o irq_init.o \
 	fault.o gdb_stub_irq_vector_table.o \
 	irq_manage.o context.o cpu_idle.o \
 	fault_s.o gdb_stub.o isr_wrapper.o \
-	fatal.o
+	fatal.o sys_fatal_error_handler.o
 
 obj-$(CONFIG_MICROKERNEL) += task_abort.o

arch/arm/core/sys_fatal_error_handler.c

@@ -0,0 +1,110 @@
+/* sysFatalErrorHandler - ARM Cortex-M system fatal error handler */
+
+/*
+ * Copyright (c) 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 for Cortex-M 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
+
+#ifdef CONFIG_MICROKERNEL
+extern void _TaskAbort(void);
+static inline void nonEssentialTaskAbort(void)
+{
+	PRINTK("Fatal fault in task ! Aborting task.\n");
+	_TaskAbort();
+}
+#define NON_ESSENTIAL_TASK_ABORT() nonEssentialTaskAbort()
+#else
+#define NON_ESSENTIAL_TASK_ABORT() \
+	do {/* nothing */          \
+	} while ((0))
+#endif
+
+/**
+ *
+ * @brief 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.
+ *
+ * @return N/A
+ *
+ * \NOMANUAL
+ */
+
+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)) {
+		PRINTK("Fatal fault in %s ! Spinning...\n",
+		       NANO_CTX_ISR == curCtx
+			       ? "ISR"
+			       : NANO_CTX_FIBER == curCtx ? "essential fiber"
+							  : "essential task");
+		for (;;)
+			; /* spin forever */
+	}
+
+	if (NANO_CTX_FIBER == curCtx) {
+		PRINTK("Fatal fault in fiber ! Aborting fiber.\n");
+		fiber_abort();
+		return;
+	}
+
+	NON_ESSENTIAL_TASK_ABORT();
+}