mirror of
https://github.com/espressif/esp-idf.git
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9b3796d2f1
Add TRY_ENTRY_CRITICAL() API to all for timeouts when entering critical sections. The following port API were added: - portTRY_ENTER_CRITICAL() - portTRY_ENTER_CRITICAL_ISR() - portTRY_ENTER_CRITICAL_SAFE() Deprecated legacy spinlock API in favor of spinlock.h. The following API were deprecated: - vPortCPUInitializeMutex() - vPortCPUAcquireMutex() - vPortCPUAcquireMutexTimeout() - vPortCPUReleaseMutex() Other Changes: - Added portMUX_INITIALIZE() to replace vPortCPUInitializeMutex() - The assembly of the critical section functions ends up being about 50 instructions longer, thus the spinlock test pass threshold had to be increased to account for the extra runtime. Closes https://github.com/espressif/esp-idf/issues/5301
500 lines
19 KiB
C
500 lines
19 KiB
C
/*
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* FreeRTOS Kernel V10.4.3
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* Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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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. If you wish to use our Amazon
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* FreeRTOS name, please do so in a fair use way that does not cause confusion.
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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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* 1 tab == 4 spaces!
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*/
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/*
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* Copyright (c) 2015-2019 Cadence Design Systems, Inc.
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*
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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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*
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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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*
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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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#include "sdkconfig.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <xtensa/config/core.h>
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#include <xtensa/xtensa_context.h>
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#include "soc/soc_caps.h"
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#include "esp_private/crosscore_int.h"
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#include "esp_system.h"
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#include "esp_log.h"
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#include "esp_int_wdt.h"
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#include "esp_app_trace.h" /* Required for esp_apptrace_init. [refactor-todo] */
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#include "FreeRTOS.h" /* This pulls in portmacro.h */
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#include "task.h" /* Required for TaskHandle_t, tskNO_AFFINITY, and vTaskStartScheduler */
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#include "port_systick.h"
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_Static_assert(tskNO_AFFINITY == CONFIG_FREERTOS_NO_AFFINITY, "incorrect tskNO_AFFINITY value");
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/* ---------------------------------------------------- Variables ------------------------------------------------------
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*
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* ------------------------------------------------------------------------------------------------------------------ */
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static const char *TAG = "cpu_start"; /* [refactor-todo]: might be appropriate to change in the future, but for now maintain the same log output */
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extern volatile int port_xSchedulerRunning[portNUM_PROCESSORS];
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unsigned port_interruptNesting[portNUM_PROCESSORS] = {0}; // Interrupt nesting level. Increased/decreased in portasm.c, _frxt_int_enter/_frxt_int_exit
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BaseType_t port_uxCriticalNesting[portNUM_PROCESSORS] = {0};
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BaseType_t port_uxOldInterruptState[portNUM_PROCESSORS] = {0};
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/* ------------------------------------------------ FreeRTOS Portable --------------------------------------------------
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* - Provides implementation for functions required by FreeRTOS
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* - Declared in portable.h
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* ------------------------------------------------------------------------------------------------------------------ */
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// ----------------- Scheduler Start/End -------------------
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/* Defined in xtensa_context.S */
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extern void _xt_coproc_init(void);
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BaseType_t xPortStartScheduler( void )
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{
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// Interrupts are disabled at this point and stack contains PS with enabled interrupts when task context is restored
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#if XCHAL_CP_NUM > 0
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/* Initialize co-processor management for tasks. Leave CPENABLE alone. */
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_xt_coproc_init();
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#endif
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/* Setup the hardware to generate the tick. */
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vPortSetupTimer();
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port_xSchedulerRunning[xPortGetCoreID()] = 1;
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// Cannot be directly called from C; never returns
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__asm__ volatile ("call0 _frxt_dispatch\n");
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/* Should not get here. */
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return pdTRUE;
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}
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void vPortEndScheduler( void )
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{
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/* It is unlikely that the Xtensa port will get stopped. If required simply
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disable the tick interrupt here. */
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abort();
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}
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// ------------------------ Stack --------------------------
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// User exception dispatcher when exiting
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void _xt_user_exit(void);
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#if CONFIG_FREERTOS_TASK_FUNCTION_WRAPPER
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// Wrapper to allow task functions to return (increases stack overhead by 16 bytes)
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static void vPortTaskWrapper(TaskFunction_t pxCode, void *pvParameters)
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{
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pxCode(pvParameters);
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//FreeRTOS tasks should not return. Log the task name and abort.
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char *pcTaskName = pcTaskGetTaskName(NULL);
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ESP_LOGE("FreeRTOS", "FreeRTOS Task \"%s\" should not return, Aborting now!", pcTaskName);
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abort();
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}
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#endif
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#if portUSING_MPU_WRAPPERS
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged )
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#else
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StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
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#endif
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{
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StackType_t *sp, *tp;
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XtExcFrame *frame;
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#if XCHAL_CP_NUM > 0
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uint32_t *p;
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#endif
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uint32_t *threadptr;
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void *task_thread_local_start;
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extern int _thread_local_start, _thread_local_end, _flash_rodata_start, _flash_rodata_align;
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// TODO: check that TLS area fits the stack
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uint32_t thread_local_sz = (uint8_t *)&_thread_local_end - (uint8_t *)&_thread_local_start;
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thread_local_sz = ALIGNUP(0x10, thread_local_sz);
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/* Initialize task's stack so that we have the following structure at the top:
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----LOW ADDRESSES ----------------------------------------HIGH ADDRESSES----------
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task stack | interrupt stack frame | thread local vars | co-processor save area |
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----------------------------------------------------------------------------------
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SP pxTopOfStack
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All parts are aligned to 16 byte boundary. */
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sp = (StackType_t *) (((UBaseType_t)pxTopOfStack - XT_CP_SIZE - thread_local_sz - XT_STK_FRMSZ) & ~0xf);
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/* Clear the entire frame (do not use memset() because we don't depend on C library) */
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for (tp = sp; tp <= pxTopOfStack; ++tp) {
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*tp = 0;
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}
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frame = (XtExcFrame *) sp;
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/* Explicitly initialize certain saved registers */
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#if CONFIG_FREERTOS_TASK_FUNCTION_WRAPPER
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frame->pc = (UBaseType_t) vPortTaskWrapper; /* task wrapper */
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#else
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frame->pc = (UBaseType_t) pxCode; /* task entrypoint */
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#endif
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frame->a0 = 0; /* to terminate GDB backtrace */
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frame->a1 = (UBaseType_t) sp + XT_STK_FRMSZ; /* physical top of stack frame */
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frame->exit = (UBaseType_t) _xt_user_exit; /* user exception exit dispatcher */
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/* Set initial PS to int level 0, EXCM disabled ('rfe' will enable), user mode. */
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/* Also set entry point argument parameter. */
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#ifdef __XTENSA_CALL0_ABI__
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#if CONFIG_FREERTOS_TASK_FUNCTION_WRAPPER
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frame->a2 = (UBaseType_t) pxCode;
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frame->a3 = (UBaseType_t) pvParameters;
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#else
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frame->a2 = (UBaseType_t) pvParameters;
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#endif
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frame->ps = PS_UM | PS_EXCM;
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#else /* __XTENSA_CALL0_ABI__ */
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/* + for windowed ABI also set WOE and CALLINC (pretend task was 'call4'd). */
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#if CONFIG_FREERTOS_TASK_FUNCTION_WRAPPER
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frame->a6 = (UBaseType_t) pxCode;
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frame->a7 = (UBaseType_t) pvParameters;
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#else
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frame->a6 = (UBaseType_t) pvParameters;
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#endif
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frame->ps = PS_UM | PS_EXCM | PS_WOE | PS_CALLINC(1);
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#endif /* __XTENSA_CALL0_ABI__ */
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#ifdef XT_USE_SWPRI
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/* Set the initial virtual priority mask value to all 1's. */
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frame->vpri = 0xFFFFFFFF;
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#endif
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/* Init threadptr register and set up TLS run-time area.
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* The diagram in port/riscv/port.c illustrates the calculations below.
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*/
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task_thread_local_start = (void *)(((uint32_t)pxTopOfStack - XT_CP_SIZE - thread_local_sz) & ~0xf);
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memcpy(task_thread_local_start, &_thread_local_start, thread_local_sz);
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threadptr = (uint32_t *)(sp + XT_STK_EXTRA);
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/* Calculate THREADPTR value.
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* The generated code will add THREADPTR value to a constant value determined at link time,
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* to get the address of the TLS variable.
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* The constant value is calculated by the linker as follows
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* (search for 'tpoff' in elf32-xtensa.c in BFD):
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* offset = address - tls_section_vma + align_up(TCB_SIZE, tls_section_alignment)
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* where TCB_SIZE is hardcoded to 8.
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* Note this is slightly different compared to the RISC-V port, where offset = address - tls_section_vma.
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*/
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const uint32_t tls_section_alignment = (uint32_t) &_flash_rodata_align; /* ALIGN value of .flash.rodata section */
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const uint32_t tcb_size = 8; /* Unrelated to FreeRTOS, this is the constant from BFD */
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const uint32_t base = (tcb_size + tls_section_alignment - 1) & (~(tls_section_alignment - 1));
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*threadptr = (uint32_t)task_thread_local_start - ((uint32_t)&_thread_local_start - (uint32_t)&_flash_rodata_start) - base;
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#if XCHAL_CP_NUM > 0
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/* Init the coprocessor save area (see xtensa_context.h) */
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/* No access to TCB here, so derive indirectly. Stack growth is top to bottom.
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* //p = (uint32_t *) xMPUSettings->coproc_area;
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*/
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p = (uint32_t *)(((uint32_t) pxTopOfStack - XT_CP_SIZE) & ~0xf);
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configASSERT( ( uint32_t ) p >= frame->a1 );
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p[0] = 0;
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p[1] = 0;
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p[2] = (((uint32_t) p) + 12 + XCHAL_TOTAL_SA_ALIGN - 1) & -XCHAL_TOTAL_SA_ALIGN;
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#endif /* XCHAL_CP_NUM */
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return sp;
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}
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/* ---------------------------------------------- Port Implementations -------------------------------------------------
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*
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* ------------------------------------------------------------------------------------------------------------------ */
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// --------------------- Interrupts ------------------------
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BaseType_t xPortInIsrContext(void)
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{
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unsigned int irqStatus;
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BaseType_t ret;
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irqStatus = portSET_INTERRUPT_MASK_FROM_ISR();
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ret = (port_interruptNesting[xPortGetCoreID()] != 0);
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portCLEAR_INTERRUPT_MASK_FROM_ISR(irqStatus);
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return ret;
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}
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void vPortAssertIfInISR(void)
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{
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configASSERT(xPortInIsrContext());
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}
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BaseType_t IRAM_ATTR xPortInterruptedFromISRContext(void)
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{
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return (port_interruptNesting[xPortGetCoreID()] != 0);
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}
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// ------------------ Critical Sections --------------------
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BaseType_t __attribute__((optimize("-O3"))) xPortEnterCriticalTimeout(portMUX_TYPE *mux, BaseType_t timeout)
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{
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/* Interrupts may already be disabled (if this function is called in nested
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* manner). However, there's no atomic operation that will allow us to check,
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* thus we have to disable interrupts again anyways.
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*
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* However, if this is call is NOT nested (i.e., the first call to enter a
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* critical section), we will save the previous interrupt level so that the
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* saved level can be restored on the last call to exit the critical.
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*/
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BaseType_t xOldInterruptLevel = portSET_INTERRUPT_MASK_FROM_ISR();
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if (!spinlock_acquire(mux, timeout)) {
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//Timed out attempting to get spinlock. Restore previous interrupt level and return
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portCLEAR_INTERRUPT_MASK_FROM_ISR(xOldInterruptLevel);
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return pdFAIL;
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}
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//Spinlock acquired. Increment the critical nesting count.
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BaseType_t coreID = xPortGetCoreID();
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BaseType_t newNesting = port_uxCriticalNesting[coreID] + 1;
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port_uxCriticalNesting[coreID] = newNesting;
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//If this is the first entry to a critical section. Save the old interrupt level.
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if ( newNesting == 1 ) {
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port_uxOldInterruptState[coreID] = xOldInterruptLevel;
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}
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return pdPASS;
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}
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void __attribute__((optimize("-O3"))) vPortExitCritical(portMUX_TYPE *mux)
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{
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/* This function may be called in a nested manner. Therefore, we only need
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* to reenable interrupts if this is the last call to exit the critical. We
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* can use the nesting count to determine whether this is the last exit call.
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*/
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spinlock_release(mux);
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BaseType_t coreID = xPortGetCoreID();
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BaseType_t nesting = port_uxCriticalNesting[coreID];
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if (nesting > 0) {
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nesting--;
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port_uxCriticalNesting[coreID] = nesting;
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//This is the last exit call, restore the saved interrupt level
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if ( nesting == 0 ) {
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portCLEAR_INTERRUPT_MASK_FROM_ISR(port_uxOldInterruptState[coreID]);
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}
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}
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}
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BaseType_t xPortEnterCriticalTimeoutCompliance(portMUX_TYPE *mux, BaseType_t timeout)
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{
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BaseType_t ret;
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if (!xPortInIsrContext()) {
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ret = xPortEnterCriticalTimeout(mux, timeout);
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} else {
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esp_rom_printf("port*_CRITICAL called from ISR context. Aborting!\n");
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abort();
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ret = pdFAIL;
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}
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return ret;
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}
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void vPortExitCriticalCompliance(portMUX_TYPE *mux)
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{
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if (!xPortInIsrContext()) {
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vPortExitCritical(mux);
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} else {
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esp_rom_printf("port*_CRITICAL called from ISR context. Aborting!\n");
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abort();
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}
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}
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// ---------------------- Yielding -------------------------
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void vPortYieldOtherCore( BaseType_t coreid )
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{
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esp_crosscore_int_send_yield( coreid );
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}
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extern void _frxt_setup_switch( void ); //Defined in portasm.S
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void IRAM_ATTR vPortEvaluateYieldFromISR(int argc, ...)
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{
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BaseType_t xYield;
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va_list ap;
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va_start(ap, argc);
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if (argc) {
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xYield = (BaseType_t)va_arg(ap, int);
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va_end(ap);
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} else {
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//it is a empty parameter vPortYieldFromISR macro call:
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va_end(ap);
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traceISR_EXIT_TO_SCHEDULER();
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_frxt_setup_switch();
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return;
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}
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//Yield exists, so need evaluate it first then switch:
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if (xYield == pdTRUE) {
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traceISR_EXIT_TO_SCHEDULER();
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_frxt_setup_switch();
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}
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}
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// ------------------- Hook Functions ----------------------
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void __attribute__((weak)) vApplicationStackOverflowHook( TaskHandle_t xTask, char *pcTaskName )
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{
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#define ERR_STR1 "***ERROR*** A stack overflow in task "
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#define ERR_STR2 " has been detected."
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const char *str[] = {ERR_STR1, pcTaskName, ERR_STR2};
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char buf[sizeof(ERR_STR1) + CONFIG_FREERTOS_MAX_TASK_NAME_LEN + sizeof(ERR_STR2) + 1 /* null char */] = { 0 };
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char *dest = buf;
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for (size_t i = 0 ; i < sizeof(str) / sizeof(str[0]); i++) {
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dest = strcat(dest, str[i]);
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}
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esp_system_abort(buf);
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}
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// ----------------------- System --------------------------
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uint32_t xPortGetTickRateHz(void)
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{
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return (uint32_t)configTICK_RATE_HZ;
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}
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#define STACK_WATCH_AREA_SIZE 32
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#define STACK_WATCH_POINT_NUMBER (SOC_CPU_WATCHPOINTS_NUM - 1)
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void vPortSetStackWatchpoint( void *pxStackStart )
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{
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//Set watchpoint 1 to watch the last 32 bytes of the stack.
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//Unfortunately, the Xtensa watchpoints can't set a watchpoint on a random [base - base+n] region because
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//the size works by masking off the lowest address bits. For that reason, we futz a bit and watch the lowest 32
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//bytes of the stack we can actually watch. In general, this can cause the watchpoint to be triggered at most
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//28 bytes early. The value 32 is chosen because it's larger than the stack canary, which in FreeRTOS is 20 bytes.
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//This way, we make sure we trigger before/when the stack canary is corrupted, not after.
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int addr = (int)pxStackStart;
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addr = (addr + 31) & (~31);
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esp_cpu_set_watchpoint(STACK_WATCH_POINT_NUMBER, (char *)addr, 32, ESP_WATCHPOINT_STORE);
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}
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/* ---------------------------------------------- Misc Implementations -------------------------------------------------
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*
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* ------------------------------------------------------------------------------------------------------------------ */
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// -------------------- Co-Processor -----------------------
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/*
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* Used to set coprocessor area in stack. Current hack is to reuse MPU pointer for coprocessor area.
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*/
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#if portUSING_MPU_WRAPPERS
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void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION *const xRegions, StackType_t *pxBottomOfStack, uint32_t usStackDepth )
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{
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#if XCHAL_CP_NUM > 0
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xMPUSettings->coproc_area = ( StackType_t * ) ( ( uint32_t ) ( pxBottomOfStack + usStackDepth - 1 ));
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xMPUSettings->coproc_area = ( StackType_t * ) ( ( ( portPOINTER_SIZE_TYPE ) xMPUSettings->coproc_area ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
|
|
xMPUSettings->coproc_area = ( StackType_t * ) ( ( ( uint32_t ) xMPUSettings->coproc_area - XT_CP_SIZE ) & ~0xf );
|
|
|
|
|
|
/* NOTE: we cannot initialize the coprocessor save area here because FreeRTOS is going to
|
|
* clear the stack area after we return. This is done in pxPortInitialiseStack().
|
|
*/
|
|
#endif
|
|
}
|
|
|
|
void vPortReleaseTaskMPUSettings( xMPU_SETTINGS *xMPUSettings )
|
|
{
|
|
/* If task has live floating point registers somewhere, release them */
|
|
_xt_coproc_release( xMPUSettings->coproc_area );
|
|
}
|
|
#endif /* portUSING_MPU_WRAPPERS */
|
|
|
|
// --------------------- App Start-up ----------------------
|
|
|
|
#if !CONFIG_FREERTOS_UNICORE
|
|
void esp_startup_start_app_other_cores(void)
|
|
{
|
|
// For now, we only support up to two core: 0 and 1.
|
|
if (xPortGetCoreID() >= 2) {
|
|
abort();
|
|
}
|
|
|
|
// Wait for FreeRTOS initialization to finish on PRO CPU
|
|
while (port_xSchedulerRunning[0] == 0) {
|
|
;
|
|
}
|
|
|
|
#if CONFIG_APPTRACE_ENABLE
|
|
// [refactor-todo] move to esp_system initialization
|
|
esp_err_t err = esp_apptrace_init();
|
|
assert(err == ESP_OK && "Failed to init apptrace module on APP CPU!");
|
|
#endif
|
|
|
|
#if CONFIG_ESP_INT_WDT
|
|
//Initialize the interrupt watch dog for CPU1.
|
|
esp_int_wdt_cpu_init();
|
|
#endif
|
|
|
|
esp_crosscore_int_init();
|
|
|
|
ESP_EARLY_LOGI(TAG, "Starting scheduler on APP CPU.");
|
|
xPortStartScheduler();
|
|
abort(); /* Only get to here if FreeRTOS somehow very broken */
|
|
}
|
|
#endif // !CONFIG_FREERTOS_UNICORE
|
|
|
|
extern void esp_startup_start_app_common(void);
|
|
|
|
void esp_startup_start_app(void)
|
|
{
|
|
#if !CONFIG_ESP_INT_WDT
|
|
#if CONFIG_ESP32_ECO3_CACHE_LOCK_FIX
|
|
assert(!soc_has_cache_lock_bug() && "ESP32 Rev 3 + Dual Core + PSRAM requires INT WDT enabled in project config!");
|
|
#endif
|
|
#endif
|
|
|
|
esp_startup_start_app_common();
|
|
|
|
ESP_LOGI(TAG, "Starting scheduler on PRO CPU.");
|
|
vTaskStartScheduler();
|
|
}
|