| /* |
| * FreeRTOS Kernel <DEVELOPMENT BRANCH> |
| * Copyright (C) 2006-2015 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 interrupt and exception functions for RTOS ports. |
| * Also see xtensa_intr_asm.S. |
| ******************************************************************************/ |
| |
| #include <stdlib.h> |
| |
| #include <xtensa/config/core.h> |
| |
| #include "freertos/FreeRTOS.h" |
| #include "freertos/xtensa_api.h" |
| #include "freertos/portable.h" |
| #include "esp_idf_version.h" |
| |
| #if (ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4, 2, 0)) |
| #include "rom/ets_sys.h" |
| #else |
| #if CONFIG_IDF_TARGET_ESP32S2 |
| #include "esp32s2/rom/ets_sys.h" |
| #elif CONFIG_IDF_TARGET_ESP32 |
| #include "esp32/rom/ets_sys.h" |
| #endif |
| #endif /* ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4, 2, 0) */ |
| |
| #if XCHAL_HAVE_EXCEPTIONS |
| |
| /* Handler table is in xtensa_intr_asm.S */ |
| |
| extern xt_exc_handler _xt_exception_table[ XCHAL_EXCCAUSE_NUM * portNUM_PROCESSORS ]; |
| |
| |
| /* |
| * Default handler for unhandled exceptions. |
| * CHANGED: We do this in panic.c now |
| */ |
| |
| /*void xt_unhandled_exception(XtExcFrame *frame) */ |
| /*{ */ |
| /*exit(-1); */ |
| /*} */ |
| extern void xt_unhandled_exception( XtExcFrame * frame ); |
| |
| |
| /* |
| * This function registers a handler for the specified exception. |
| * The function returns the address of the previous handler. |
| * On error, it returns 0. |
| */ |
| xt_exc_handler xt_set_exception_handler( int n, |
| xt_exc_handler f ) |
| { |
| xt_exc_handler old; |
| |
| if( ( n < 0 ) || ( n >= XCHAL_EXCCAUSE_NUM ) ) |
| { |
| return 0; /* invalid exception number */ |
| } |
| |
| /* Convert exception number to _xt_exception_table name */ |
| n = n * portNUM_PROCESSORS + xPortGetCoreID(); |
| old = _xt_exception_table[ n ]; |
| |
| if( f ) |
| { |
| _xt_exception_table[ n ] = f; |
| } |
| else |
| { |
| _xt_exception_table[ n ] = &xt_unhandled_exception; |
| } |
| |
| return( ( old == &xt_unhandled_exception ) ? 0 : old ); |
| } |
| |
| #endif /* if XCHAL_HAVE_EXCEPTIONS */ |
| |
| #if XCHAL_HAVE_INTERRUPTS |
| |
| /* Handler table is in xtensa_intr_asm.S */ |
| |
| typedef struct xt_handler_table_entry |
| { |
| void * handler; |
| void * arg; |
| } xt_handler_table_entry; |
| |
| extern xt_handler_table_entry _xt_interrupt_table[ XCHAL_NUM_INTERRUPTS * portNUM_PROCESSORS ]; |
| |
| |
| /* |
| * Default handler for unhandled interrupts. |
| */ |
| void xt_unhandled_interrupt( void * arg ) |
| { |
| ets_printf( "Unhandled interrupt %d on cpu %d!\n", ( int ) arg, xPortGetCoreID() ); |
| } |
| |
| |
| /* |
| * This function registers a handler for the specified interrupt. The "arg" |
| * parameter specifies the argument to be passed to the handler when it is |
| * invoked. The function returns the address of the previous handler. |
| * On error, it returns 0. |
| */ |
| xt_handler xt_set_interrupt_handler( int n, |
| xt_handler f, |
| void * arg ) |
| { |
| xt_handler_table_entry * entry; |
| xt_handler old; |
| |
| if( ( n < 0 ) || ( n >= XCHAL_NUM_INTERRUPTS ) ) |
| { |
| return 0; /* invalid interrupt number */ |
| } |
| |
| if( Xthal_intlevel[ n ] > XCHAL_EXCM_LEVEL ) |
| { |
| return 0; /* priority level too high to safely handle in C */ |
| } |
| |
| /* Convert exception number to _xt_exception_table name */ |
| n = n * portNUM_PROCESSORS + xPortGetCoreID(); |
| |
| entry = _xt_interrupt_table + n; |
| old = entry->handler; |
| |
| if( f ) |
| { |
| entry->handler = f; |
| entry->arg = arg; |
| } |
| else |
| { |
| entry->handler = &xt_unhandled_interrupt; |
| entry->arg = ( void * ) n; |
| } |
| |
| return( ( old == &xt_unhandled_interrupt ) ? 0 : old ); |
| } |
| |
| #if CONFIG_SYSVIEW_ENABLE |
| void * xt_get_interrupt_handler_arg( int n ) |
| { |
| xt_handler_table_entry * entry; |
| |
| if( ( n < 0 ) || ( n >= XCHAL_NUM_INTERRUPTS ) ) |
| { |
| return 0; /* invalid interrupt number */ |
| } |
| |
| /* Convert exception number to _xt_exception_table name */ |
| n = n * portNUM_PROCESSORS + xPortGetCoreID(); |
| |
| entry = _xt_interrupt_table + n; |
| return entry->arg; |
| } |
| #endif /* if CONFIG_SYSVIEW_ENABLE */ |
| |
| #endif /* XCHAL_HAVE_INTERRUPTS */ |