| /* |
| * FreeRTOS Kernel <DEVELOPMENT BRANCH> |
| * Copyright (C) 2015-2019 Cadence Design Systems, Inc. |
| * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of |
| * this software and associated documentation files (the "Software"), to deal in |
| * the Software without restriction, including without limitation the rights to |
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of |
| * the Software, and to permit persons to whom the Software is furnished to do so, |
| * subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS |
| * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR |
| * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER |
| * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * https://www.FreeRTOS.org |
| * https://github.com/FreeRTOS |
| * |
| */ |
| |
| /* |
| * Xtensa-specific API for RTOS ports. |
| */ |
| |
| #ifndef __XTENSA_API_H__ |
| #define __XTENSA_API_H__ |
| |
| #include <xtensa/hal.h> |
| |
| #include "xtensa_context.h" |
| |
| |
| /* Typedef for C-callable interrupt handler function */ |
| typedef void (*xt_handler)(void *); |
| |
| /* Typedef for C-callable exception handler function */ |
| typedef void (*xt_exc_handler)(XtExcFrame *); |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to set a handler for the specified exception. |
| |
| n - Exception number (type) |
| f - Handler function address, NULL to uninstall handler. |
| |
| The handler will be passed a pointer to the exception frame, which is created |
| on the stack of the thread that caused the exception. |
| |
| If the handler returns, the thread context will be restored and the faulting |
| instruction will be retried. Any values in the exception frame that are |
| modified by the handler will be restored as part of the context. For details |
| of the exception frame structure see xtensa_context.h. |
| ------------------------------------------------------------------------------- |
| */ |
| extern xt_exc_handler xt_set_exception_handler(int n, xt_exc_handler f); |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to set a handler for the specified interrupt. |
| |
| n - Interrupt number. |
| f - Handler function address, NULL to uninstall handler. |
| arg - Argument to be passed to handler. |
| ------------------------------------------------------------------------------- |
| */ |
| extern xt_handler xt_set_interrupt_handler(int n, xt_handler f, void * arg); |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to enable the specified interrupts. |
| |
| mask - Bit mask of interrupts to be enabled. |
| |
| Returns the previous state of the interrupt enables. |
| ------------------------------------------------------------------------------- |
| */ |
| extern unsigned int xt_ints_on(unsigned int mask); |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to disable the specified interrupts. |
| |
| mask - Bit mask of interrupts to be disabled. |
| |
| Returns the previous state of the interrupt enables. |
| ------------------------------------------------------------------------------- |
| */ |
| extern unsigned int xt_ints_off(unsigned int mask); |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to set the specified (s/w) interrupt. |
| ------------------------------------------------------------------------------- |
| */ |
| static inline void xt_set_intset(unsigned int arg) |
| { |
| xthal_set_intset(arg); |
| } |
| |
| |
| /* |
| ------------------------------------------------------------------------------- |
| Call this function to clear the specified (s/w or edge-triggered) |
| interrupt. |
| ------------------------------------------------------------------------------- |
| */ |
| static inline void xt_set_intclear(unsigned int arg) |
| { |
| xthal_set_intclear(arg); |
| } |
| |
| |
| #endif /* __XTENSA_API_H__ */ |