265 lines
8.4 KiB
C
265 lines
8.4 KiB
C
/*
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FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS provides completely free yet professionally developed, *
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* robust, strictly quality controlled, supported, and cross *
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* platform software that has become a de facto standard. *
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* *
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* Help yourself get started quickly and support the FreeRTOS *
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* project by purchasing a FreeRTOS tutorial book, reference *
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* manual, or both from: http://www.FreeRTOS.org/Documentation *
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* *
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* Thank you! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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>>! NOTE: The modification to the GPL is included to allow you to distribute
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>>! a combined work that includes FreeRTOS without being obliged to provide
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>>! the source code for proprietary components outside of the FreeRTOS
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>>! kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. Full license text is available from the following
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link: http://www.freertos.org/a00114.html
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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compatible FAT file system, and our tiny thread aware UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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licenses offer ticketed support, indemnification and middleware.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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1 tab == 4 spaces!
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*/
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for ESP8266
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*
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* This is based on the version supplied in esp_iot_rtos_sdk,
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* which is in turn based on the ARM CM3 port.
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*----------------------------------------------------------*/
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/* Scheduler includes. */
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#include <xtensa/config/core.h>
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#include "FreeRTOS.h"
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#include "task.h"
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#include "xtensa_rtos.h"
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unsigned cpu_sr;
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char level1_int_disabled;
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/*
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* Stack initialization
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*/
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portSTACK_TYPE *
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pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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#define SET_STKREG(r,v) sp[(r) >> 2] = (portSTACK_TYPE)(v)
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portSTACK_TYPE *sp, *tp;
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/* Create interrupt stack frame aligned to 16 byte boundary */
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sp = (portSTACK_TYPE*) (((uint32_t)(pxTopOfStack+1) - XT_CP_SIZE - 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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/* Explicitly initialize certain saved registers */
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SET_STKREG( XT_STK_PC, pxCode ); /* task entrypoint */
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SET_STKREG( XT_STK_A0, 0 ); /* to terminate GDB backtrace */
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SET_STKREG( XT_STK_A1, (uint32_t)sp + XT_STK_FRMSZ ); /* physical top of stack frame */
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SET_STKREG( XT_STK_A2, pvParameters ); /* parameters */
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SET_STKREG( XT_STK_EXIT, _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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SET_STKREG( XT_STK_PS, PS_UM | PS_EXCM );
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return sp;
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}
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enum SVC_ReqType {
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SVC_Software = 1,
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SVC_MACLayer = 2,
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};
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static int pending_soft_sv;
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static int pending_maclayer_sv;
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/* PendSV is called in place of vPortYield() to request a supervisor
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call.
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The portYIELD macro calls pendSV if it's a software request.
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The libpp and libudhcp libraries also call this function, assuming
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always with arg==2 (but maybe sometimes with arg==1?)
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In the original esp_iot_rtos_sdk implementation, arg was a char. Using an
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enum is ABI-compatible, though.
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*/
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void PendSV( char req )
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{
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vPortEnterCritical();
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if(req == SVC_Software)
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{
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pending_soft_sv = 1;
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}
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else if(req == SVC_MACLayer)
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pending_maclayer_sv= 1;
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xthal_set_intset(1<<ETS_SOFT_INUM);
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vPortExitCritical();
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}
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/* This MAC layer ISR handler is defined in libpp.a, and is called
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* after a Blob SV requests a soft interrupt by calling
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* PendSV(SVC_MACLayer).
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*/
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extern portBASE_TYPE MacIsrSigPostDefHdl(void);
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void SV_ISR(void)
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{
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portBASE_TYPE xHigherPriorityTaskWoken=pdFALSE ;
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if(pending_maclayer_sv)
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{
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xHigherPriorityTaskWoken = MacIsrSigPostDefHdl();
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pending_maclayer_sv = 0;
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}
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if( xHigherPriorityTaskWoken || pending_soft_sv)
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{
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_xt_timer_int1();
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pending_soft_sv = 0;
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}
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}
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void xPortSysTickHandle (void)
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{
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//CloseNMI();
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{
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if(xTaskIncrementTick() !=pdFALSE )
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{
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//GPIO_REG_WRITE(GPIO_STATUS_W1TS_ADDRESS, 0x40);
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vTaskSwitchContext();
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}
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}
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//OpenNMI();
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}
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/*
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* See header file for description.
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*/
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portBASE_TYPE ICACHE_FLASH_ATTR
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xPortStartScheduler( void )
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{
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//set SV and systemtick as lowest priority ISR.
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_xt_isr_attach(ETS_SOFT_INUM, SV_ISR);
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_xt_isr_unmask(1<<ETS_SOFT_INUM);
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/* Initialize system tick timer interrupt and schedule the first tick. */
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_xt_tick_timer_init();
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printf("xPortStartScheduler\n");
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vTaskSwitchContext();
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// REG_SET_BIT(0x3ff2006c, BIT(4));
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/* Restore the context of the first task that is going to run. */
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XT_RTOS_INT_EXIT();
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/* Should not get here as the tasks are now running! */
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return pdTRUE;
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}
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void ICACHE_FLASH_ATTR
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vPortEndScheduler( void )
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{
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/* It is unlikely that the CM3 port will require this function as there
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is nothing to return to. */
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}
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/*-----------------------------------------------------------*/
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/*-----------------------------------------------------------*/
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/* Each task maintains its own interrupt status in the critical nesting
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variable. */
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static unsigned portBASE_TYPE uxCriticalNesting = 0;
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void vPortEnterCritical( void )
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{
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portDISABLE_INTERRUPTS();
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uxCriticalNesting++;
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}
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/*-----------------------------------------------------------*/
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void vPortExitCritical( void )
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{
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uxCriticalNesting--;
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if( uxCriticalNesting == 0 )
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portENABLE_INTERRUPTS();
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}
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/*-----------------------------------------------------------*/
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_xt_isr isr[16];
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void _xt_isr_attach(uint8_t i, _xt_isr func)
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{
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isr[i] = func;
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}
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uint16_t _xt_isr_handler(uint16_t i)
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{
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uint8_t index;
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if (i & (1 << ETS_WDT_INUM)) {
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// printf("i %x %u\n", i, REG_READ(0x3ff20c00));
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index = ETS_WDT_INUM;
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}
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else if (i & (1 << ETS_GPIO_INUM)) {
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index = ETS_GPIO_INUM;
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}else {
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index = __builtin_ffs(i) - 1;
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if (index == ETS_MAX_INUM) {
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i &= ~(1 << ETS_MAX_INUM);
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index = __builtin_ffs(i) - 1;
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}
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}
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_xt_clear_ints(1<<index);
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isr[index]();
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return i & ~(1 << index);
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}
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