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131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* Copyright (C) 2015-2019 Cadence Design Systems, Inc.
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* 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 all
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* 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, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/*
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* Xtensa-specific API for RTOS ports.
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*/
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#ifndef __XTENSA_API_H__
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#define __XTENSA_API_H__
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#include <xtensa/hal.h>
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#include "xtensa_context.h"
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/* Typedef for C-callable interrupt handler function */
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typedef void (* xt_handler)( void * );
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/* Typedef for C-callable exception handler function */
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typedef void (* xt_exc_handler)( XtExcFrame * );
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/*
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* -------------------------------------------------------------------------------
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* Call this function to set a handler for the specified exception.
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*
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* n - Exception number (type)
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* f - Handler function address, NULL to uninstall handler.
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*
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* The handler will be passed a pointer to the exception frame, which is created
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* on the stack of the thread that caused the exception.
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*
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* If the handler returns, the thread context will be restored and the faulting
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* instruction will be retried. Any values in the exception frame that are
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* modified by the handler will be restored as part of the context. For details
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* of the exception frame structure see xtensa_context.h.
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* -------------------------------------------------------------------------------
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*/
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extern xt_exc_handler xt_set_exception_handler( int n,
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xt_exc_handler f );
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/*
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* -------------------------------------------------------------------------------
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* Call this function to set a handler for the specified interrupt.
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*
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* n - Interrupt number.
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* f - Handler function address, NULL to uninstall handler.
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* arg - Argument to be passed to handler.
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* -------------------------------------------------------------------------------
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*/
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extern xt_handler xt_set_interrupt_handler( int n,
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xt_handler f,
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void * arg );
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/*
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* -------------------------------------------------------------------------------
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* Call this function to enable the specified interrupts.
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*
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* mask - Bit mask of interrupts to be enabled.
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*
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* Returns the previous state of the interrupt enables.
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* -------------------------------------------------------------------------------
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*/
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extern unsigned int xt_ints_on( unsigned int mask );
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/*
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* -------------------------------------------------------------------------------
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* Call this function to disable the specified interrupts.
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*
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* mask - Bit mask of interrupts to be disabled.
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*
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* Returns the previous state of the interrupt enables.
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* -------------------------------------------------------------------------------
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*/
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extern unsigned int xt_ints_off( unsigned int mask );
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/*
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* -------------------------------------------------------------------------------
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* Call this function to set the specified (s/w) interrupt.
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* -------------------------------------------------------------------------------
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*/
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static inline void xt_set_intset( unsigned int arg )
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{
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xthal_set_intset( arg );
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}
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/*
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* -------------------------------------------------------------------------------
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* Call this function to clear the specified (s/w or edge-triggered)
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* interrupt.
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* -------------------------------------------------------------------------------
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*/
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static inline void xt_set_intclear( unsigned int arg )
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{
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xthal_set_intclear( arg );
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}
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#endif /* __XTENSA_API_H__ */
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