mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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756c9ef1aa
Keep the per-task FPU context allocation reachable, avoid replacing an existing task tag buffer, and free the allocation from portCLEAN_UP_TCB using the saved buffer end pointer. Signed-off-by: Old-Ding <ai.neo.ae86@gmail.com>
165 lines
6.6 KiB
C
165 lines
6.6 KiB
C
/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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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.
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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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*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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#include <machine.h>
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/* *INDENT-OFF* */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* *INDENT-ON* */
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/*-----------------------------------------------------------
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* Port specific definitions.
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*
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* The settings in this file configure FreeRTOS correctly for the
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* given hardware and compiler.
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*
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* These settings should not be altered.
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*-----------------------------------------------------------
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*/
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/* Type definitions - these are a bit legacy and not really used now, other than
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* portSTACK_TYPE and portBASE_TYPE. */
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#define portCHAR char
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#define portFLOAT float
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#define portDOUBLE double
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#define portLONG long
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#define portSHORT short
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#define portSTACK_TYPE uint32_t
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#define portBASE_TYPE long
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typedef portSTACK_TYPE StackType_t;
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typedef long BaseType_t;
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typedef unsigned long UBaseType_t;
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#if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
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typedef uint16_t TickType_t;
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#define portMAX_DELAY ( TickType_t ) 0xffff
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#elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
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typedef uint32_t TickType_t;
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#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
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/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
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* not need to be guarded with a critical section. */
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#define portTICK_TYPE_IS_ATOMIC 1
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#endif
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/*-----------------------------------------------------------*/
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/* Hardware specifics. */
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#define portBYTE_ALIGNMENT 8
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#define portSTACK_GROWTH -1
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#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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#define portNOP() nop()
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#define portSTART_SCHEDULER_TRAP_NO ( 32 )
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#define portYIELD_TRAP_NO ( 33 )
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#define portKERNEL_INTERRUPT_PRIORITY ( 1 )
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/* Dimensions the array into which the floating point context is saved.
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* Allocate enough space for FPR0 to FPR15, FPUL and FPSCR, each of which is 4
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* bytes big. If this number is changed then the 72 in portasm.src also needs
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* changing. */
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#define portFLOP_REGISTERS_TO_STORE ( 18 )
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#define portFLOP_STORAGE_SIZE ( portFLOP_REGISTERS_TO_STORE * 4 )
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void vPortYield( void );
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#define portYIELD() vPortYield()
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extern void vTaskSwitchContext( void );
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#define portYIELD_FROM_ISR( x ) do { if( x != pdFALSE ) vTaskSwitchContext( ); } while( 0 )
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/*
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* This function tells the kernel that the task referenced by xTask is going to
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* use the floating point registers and therefore requires the floating point
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* registers saved as part of its context.
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*/
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BaseType_t xPortUsesFloatingPoint( void * xTask );
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/*
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* The flop save and restore functions are defined in portasm.src and called by
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* the trace "task switched in" and "trace task switched out" macros.
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*/
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void vPortSaveFlopRegisters( void * pulBuffer );
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void vPortRestoreFlopRegisters( void * pulBuffer );
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/*
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* pxTaskTag is used to point to the buffer into which the floating point
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* context should be saved. If pxTaskTag is NULL then the task does not use
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* a floating point context.
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*/
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#define traceTASK_SWITCHED_OUT() do { if( pxCurrentTCB->pxTaskTag != NULL ) vPortSaveFlopRegisters( pxCurrentTCB->pxTaskTag ); } while( 0 )
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#define traceTASK_SWITCHED_IN() do { if( pxCurrentTCB->pxTaskTag != NULL ) vPortRestoreFlopRegisters( pxCurrentTCB->pxTaskTag ); } while( 0 )
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/* pxTaskTag points just above the FPU context buffer because the save routine
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* uses a pre-decrement. Recover the allocation base before freeing it. */
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#define portCLEAN_UP_TCB( pxTCB ) \
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do \
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{ \
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if( ( pxTCB )->pxTaskTag != NULL ) \
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{ \
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uint32_t * pulFlopBufferEnd = \
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( uint32_t * ) ( pxTCB )->pxTaskTag; \
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vPortFree( ( void * ) ( pulFlopBufferEnd - \
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portFLOP_REGISTERS_TO_STORE ) ); \
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( pxTCB )->pxTaskTag = NULL; \
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} \
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} while( 0 )
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/*
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* These macros should be called directly, but through the taskENTER_CRITICAL()
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* and taskEXIT_CRITICAL() macros.
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*/
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#define portENABLE_INTERRUPTS() set_imask( 0x00 )
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#define portDISABLE_INTERRUPTS() set_imask( portKERNEL_INTERRUPT_PRIORITY )
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/* Critical nesting counts are stored in the TCB. */
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#define portCRITICAL_NESTING_IN_TCB ( 1 )
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/* The critical nesting functions defined within tasks.c. */
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extern void vTaskEnterCritical( void );
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extern void vTaskExitCritical( void );
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#define portENTER_CRITICAL() vTaskEnterCritical();
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#define portEXIT_CRITICAL() vTaskExitCritical();
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/*-----------------------------------------------------------*/
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/* Task function macros as described on the FreeRTOS.org WEB site. */
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
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#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
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/* *INDENT-OFF* */
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#ifdef __cplusplus
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}
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#endif
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/* *INDENT-ON* */
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#endif /* PORTMACRO_H */
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