2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
33 /* Hardware specifics. */
34 #include <intrinsics.h>
42 /*-----------------------------------------------------------
43 * Port specific definitions.
45 * The settings in this file configure FreeRTOS correctly for the
46 * given hardware and compiler.
48 * These settings should not be altered.
49 *-----------------------------------------------------------
52 /* When the FIT configurator or the Smart Configurator is used, platform.h has to be
54 #ifndef configINCLUDE_PLATFORM_H_INSTEAD_OF_IODEFINE_H
55 #define configINCLUDE_PLATFORM_H_INSTEAD_OF_IODEFINE_H 0
58 /* If configUSE_TASK_DPFPU_SUPPORT is set to 1 (or undefined) then each task will
59 * be created without a DPFPU context, and a task must call vTaskUsesDPFPU() before
60 * making use of any DPFPU registers. If configUSE_TASK_DPFPU_SUPPORT is set to 2 then
61 * tasks are created with a DPFPU context by default, and calling vTaskUsesDPFPU() has
62 * no effect. If configUSE_TASK_DPFPU_SUPPORT is set to 0 then tasks never take care
63 * of any DPFPU context (even if DPFPU registers are used). */
64 #ifndef configUSE_TASK_DPFPU_SUPPORT
65 #define configUSE_TASK_DPFPU_SUPPORT 1
68 /*-----------------------------------------------------------*/
70 /* Type definitions - these are a bit legacy and not really used now, other than
71 * portSTACK_TYPE and portBASE_TYPE. */
73 #define portFLOAT float
74 #define portDOUBLE double
76 #define portSHORT short
77 #define portSTACK_TYPE uint32_t
78 #define portBASE_TYPE long
80 typedef portSTACK_TYPE StackType_t;
81 typedef long BaseType_t;
82 typedef unsigned long UBaseType_t;
84 #if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
85 typedef uint16_t TickType_t;
86 #define portMAX_DELAY ( TickType_t ) 0xffff
87 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
88 typedef uint32_t TickType_t;
89 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
91 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
92 * not need to be guarded with a critical section. */
93 #define portTICK_TYPE_IS_ATOMIC 1
95 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
98 /*-----------------------------------------------------------*/
100 /* Hardware specifics. */
101 #define portBYTE_ALIGNMENT 8 /* Could make four, according to manual. */
102 #define portSTACK_GROWTH -1
103 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
104 #define portNOP() __no_operation()
106 /* Yield equivalent to "*portITU_SWINTR = 0x01; ( void ) *portITU_SWINTR;"
107 * where portITU_SWINTR is the location of the software interrupt register
108 * (0x000872E0). Don't rely on the assembler to select a register, so instead
109 * save and restore clobbered registers manually. */
110 #define portYIELD() \
114 "MOV.L #0x872E0, R10 \n" \
115 "MOV.B #0x1, [R10] \n" \
116 "CMP [R10].UB, R10 \n" \
118 portCDT_NO_PARSE( ::: ) "cc" \
121 #define portYIELD_FROM_ISR( x ) do { if( ( x ) != pdFALSE ) portYIELD( ); } while( 0 )
123 /* Workaround to reduce errors/warnings caused by e2 studio CDT's INDEXER and CODAN. */
124 #ifdef __CDT_PARSER__
128 #ifndef __attribute__
129 #define __attribute__( ... )
131 #define portCDT_NO_PARSE( token )
133 #define portCDT_NO_PARSE( token ) token
136 /* These macros should not be called directly, but through the
137 * taskENTER_CRITICAL() and taskEXIT_CRITICAL() macros. An extra check is
138 * performed if configASSERT() is defined to ensure an assertion handler does not
139 * inadvertently attempt to lower the IPL when the call to assert was triggered
140 * because the IPL value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY
141 * when an ISR safe FreeRTOS API function was executed. ISR safe FreeRTOS API
142 * functions are those that end in FromISR. FreeRTOS maintains a separate
143 * interrupt API to ensure API function and interrupt entry is as fast and as
144 * simple as possible. */
145 #define portENABLE_INTERRUPTS() __set_interrupt_level( ( uint8_t ) 0 )
146 #if ( configASSERT_DEFINED == 1 )
147 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() configASSERT( ( __get_interrupt_level() <= configMAX_SYSCALL_INTERRUPT_PRIORITY ) )
148 #define portDISABLE_INTERRUPTS() if( __get_interrupt_level() < configMAX_SYSCALL_INTERRUPT_PRIORITY ) __set_interrupt_level( ( uint8_t ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
150 #define portDISABLE_INTERRUPTS() __set_interrupt_level( ( uint8_t ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
153 /* Critical nesting counts are stored in the TCB. */
154 #define portCRITICAL_NESTING_IN_TCB ( 1 )
156 /* The critical nesting functions defined within tasks.c. */
157 extern void vTaskEnterCritical( void );
158 extern void vTaskExitCritical( void );
159 #define portENTER_CRITICAL() vTaskEnterCritical()
160 #define portEXIT_CRITICAL() vTaskExitCritical()
162 /* As this port allows interrupt nesting... */
163 #define portSET_INTERRUPT_MASK_FROM_ISR() __get_interrupt_level(); portDISABLE_INTERRUPTS()
164 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ) __set_interrupt_level( ( uint8_t ) ( uxSavedInterruptStatus ) )
166 /*-----------------------------------------------------------*/
168 /* Task function macros as described on the FreeRTOS.org WEB site. */
169 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
170 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
172 /*-----------------------------------------------------------*/
174 /* If configUSE_TASK_DPFPU_SUPPORT is set to 1 (or left undefined) then tasks are
175 * created without a DPFPU context and must call vPortTaskUsesDPFPU() to give
176 * themselves a DPFPU context before using any DPFPU instructions. If
177 * configUSE_TASK_DPFPU_SUPPORT is set to 2 then all tasks will have a DPFPU context
179 #if ( configUSE_TASK_DPFPU_SUPPORT == 1 )
180 void vPortTaskUsesDPFPU( void );
183 /* Each task has a DPFPU context already, so define this function away to
184 * nothing to prevent it being called accidentally. */
185 #define vPortTaskUsesDPFPU()
187 #define portTASK_USES_DPFPU() vPortTaskUsesDPFPU()
189 /* Definition to allow compatibility with existing FreeRTOS Demo using flop.c. */
190 #define portTASK_USES_FLOATING_POINT() vPortTaskUsesDPFPU()
192 /* Prevent warnings of undefined behaviour: the order of volatile accesses is
193 * undefined - all warnings have been manually checked and are not an issue, and
194 * the warnings cannot be prevent by code changes without undesirable effects. */
195 #pragma diag_suppress=Pa082
203 #endif /* PORTMACRO_H */