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131 lines
4.8 KiB
C
131 lines
4.8 KiB
C
/*******************************************************************************
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Copyright (c) 2006-2015 Cadence Design Systems Inc.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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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. The handler
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will be installed on the core that calls this function.
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n - Exception number (type)
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f - Handler function address, NULL to uninstall handler.
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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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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, 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. The handler
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will be installed on the core that calls this function.
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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, xt_handler f, void * arg);
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/*
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-------------------------------------------------------------------------------
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Call this function to enable the specified interrupts on the core that runs
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this code.
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mask - Bit mask of interrupts to be enabled.
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-------------------------------------------------------------------------------
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*/
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extern void 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 on the core that runs
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this code.
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mask - Bit mask of interrupts to be disabled.
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-------------------------------------------------------------------------------
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*/
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extern void 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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/*
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-------------------------------------------------------------------------------
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Call this function to get handler's argument for the specified interrupt.
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n - Interrupt number.
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-------------------------------------------------------------------------------
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*/
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extern void * xt_get_interrupt_handler_arg(int n);
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#endif /* __XTENSA_API_H__ */
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