96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief NMI handler infrastructure
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*
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* Provides a boot time handler that simply hangs in a sleep loop, and a run
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* time handler that resets the CPU. Also provides a mechanism for hooking a
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* custom run time handler.
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*/
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#include <kernel.h>
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#include <arch/cpu.h>
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#include <misc/printk.h>
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#include <misc/reboot.h>
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#include <toolchain.h>
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#include <sections.h>
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extern void _SysNmiOnReset(void);
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#if !defined(CONFIG_RUNTIME_NMI)
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#define handler _SysNmiOnReset
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#endif
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#ifdef CONFIG_RUNTIME_NMI
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typedef void (*_NmiHandler_t)(void);
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static _NmiHandler_t handler = _SysNmiOnReset;
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/**
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*
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* @brief Default NMI handler installed when kernel is up
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*
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* The default handler outputs a error message and reboots the target. It is
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* installed by calling _NmiInit();
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*
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* @return N/A
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*/
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static void _DefaultHandler(void)
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{
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printk("NMI received! Rebooting...\n");
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/* In ARM implementation sys_reboot ignores the parameter */
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sys_reboot(0);
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}
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/**
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*
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* @brief Install default runtime NMI handler
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*
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* Meant to be called by platform code if they want to install a simple NMI
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* handler that reboots the target. It should be installed after the console is
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* initialized.
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*
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* @return N/A
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*/
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void _NmiInit(void)
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{
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handler = _DefaultHandler;
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}
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/**
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*
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* @brief Install a custom runtime NMI handler
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*
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* Meant to be called by platform code if they want to install a custom NMI
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* handler that reboots. It should be installed after the console is
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* initialized if it is meant to output to the console.
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*
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* @return N/A
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*/
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void _NmiHandlerSet(void (*pHandler)(void))
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{
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handler = pHandler;
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}
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#endif /* CONFIG_RUNTIME_NMI */
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/**
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*
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* @brief Handler installed in the vector table
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*
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* Simply call what is installed in 'static void(*handler)(void)'.
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*
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* @return N/A
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*/
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void __nmi(void)
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{
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handler();
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_ExcExit();
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}
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