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
37 /* Hardware specifics. */
40 /*-----------------------------------------------------------
41 * Port specific definitions.
43 * The settings in this file configure FreeRTOS correctly for the
44 * given hardware and compiler.
46 * These settings should not be altered.
47 *-----------------------------------------------------------
50 /* When the FIT configurator or the Smart Configurator is used, platform.h has to be
52 #ifndef configINCLUDE_PLATFORM_H_INSTEAD_OF_IODEFINE_H
53 #define configINCLUDE_PLATFORM_H_INSTEAD_OF_IODEFINE_H 0
56 /* If configUSE_TASK_DPFPU_SUPPORT is set to 1 (or undefined) then each task will
57 * be created without a DPFPU context, and a task must call vTaskUsesDPFPU() before
58 * making use of any DPFPU registers. If configUSE_TASK_DPFPU_SUPPORT is set to 2 then
59 * tasks are created with a DPFPU context by default, and calling vTaskUsesDPFPU() has
60 * no effect. If configUSE_TASK_DPFPU_SUPPORT is set to 0 then tasks never take care
61 * of any DPFPU context (even if DPFPU registers are used). */
62 #ifndef configUSE_TASK_DPFPU_SUPPORT
63 #define configUSE_TASK_DPFPU_SUPPORT 1
66 /*-----------------------------------------------------------*/
68 /* Type definitions - these are a bit legacy and not really used now, other than
69 * portSTACK_TYPE and portBASE_TYPE. */
71 #define portFLOAT float
72 #define portDOUBLE double
74 #define portSHORT short
75 #define portSTACK_TYPE uint32_t
76 #define portBASE_TYPE long
78 typedef portSTACK_TYPE StackType_t;
79 typedef long BaseType_t;
80 typedef unsigned long UBaseType_t;
82 #if ( configUSE_16_BIT_TICKS == 1 )
83 typedef uint16_t TickType_t;
84 #define portMAX_DELAY ( TickType_t ) 0xffff
86 typedef uint32_t TickType_t;
87 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
89 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
90 * not need to be guarded with a critical section. */
91 #define portTICK_TYPE_IS_ATOMIC 1
94 /*-----------------------------------------------------------*/
96 /* Hardware specifics. */
97 #define portBYTE_ALIGNMENT 8 /* Could make four, according to manual. */
98 #define portSTACK_GROWTH -1
99 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
100 #define portNOP() nop()
102 /* Yield equivalent to "*portITU_SWINTR = 0x01; ( void ) *portITU_SWINTR;"
103 * where portITU_SWINTR is the location of the software interrupt register
104 * (0x000872E0). Don't rely on the assembler to select a register, so instead
105 * save and restore clobbered registers manually. */
106 #pragma inline_asm vPortYield
107 static void vPortYield( void )
109 #ifndef __CDT_PARSER__
110 /* Save clobbered register - may not actually be necessary if inline asm
111 * functions are considered to use the same rules as function calls by the
114 /* Set ITU SWINTR. */
115 MOV.L # 000872E0H, R5
117 /* Read back to ensure the value is taken before proceeding. */
119 /* Restore clobbered register to its previous value. */
124 #define portYIELD() vPortYield()
125 #define portYIELD_FROM_ISR( x ) do { if( ( x ) != pdFALSE ) portYIELD(); } while( 0 )
127 /* These macros should not be called directly, but through the
128 * taskENTER_CRITICAL() and taskEXIT_CRITICAL() macros. An extra check is
129 * performed if configASSERT() is defined to ensure an assertion handler does not
130 * inadvertently attempt to lower the IPL when the call to assert was triggered
131 * because the IPL value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY
132 * when an ISR safe FreeRTOS API function was executed. ISR safe FreeRTOS API
133 * functions are those that end in FromISR. FreeRTOS maintains a separate
134 * interrupt API to ensure API function and interrupt entry is as fast and as
135 * simple as possible. */
136 #define portENABLE_INTERRUPTS() set_ipl( ( long ) 0 )
138 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() configASSERT( ( get_ipl() <= configMAX_SYSCALL_INTERRUPT_PRIORITY ) )
139 #define portDISABLE_INTERRUPTS() if( get_ipl() < configMAX_SYSCALL_INTERRUPT_PRIORITY ) set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
141 #define portDISABLE_INTERRUPTS() set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
144 /* Critical nesting counts are stored in the TCB. */
145 #define portCRITICAL_NESTING_IN_TCB ( 1 )
147 /* The critical nesting functions defined within tasks.c. */
148 extern void vTaskEnterCritical( void );
149 extern void vTaskExitCritical( void );
150 #define portENTER_CRITICAL() vTaskEnterCritical()
151 #define portEXIT_CRITICAL() vTaskExitCritical()
153 /* As this port allows interrupt nesting... */
154 #define portSET_INTERRUPT_MASK_FROM_ISR() ( UBaseType_t ) get_ipl(); set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
155 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ) set_ipl( ( long ) uxSavedInterruptStatus )
157 /*-----------------------------------------------------------*/
159 /* Task function macros as described on the FreeRTOS.org WEB site. */
160 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
161 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
163 /*-----------------------------------------------------------*/
165 /* If configUSE_TASK_DPFPU_SUPPORT is set to 1 (or left undefined) then tasks are
166 * created without a DPFPU context and must call vPortTaskUsesDPFPU() to give
167 * themselves a DPFPU context before using any DPFPU instructions. If
168 * configUSE_TASK_DPFPU_SUPPORT is set to 2 then all tasks will have a DPFPU context
170 #if( configUSE_TASK_DPFPU_SUPPORT == 1 )
171 void vPortTaskUsesDPFPU( void );
173 /* Each task has a DPFPU context already, so define this function away to
174 * nothing to prevent it being called accidentally. */
175 #define vPortTaskUsesDPFPU()
177 #define portTASK_USES_DPFPU() vPortTaskUsesDPFPU()
179 /* Definition to allow compatibility with existing FreeRTOS Demo using flop.c. */
180 #define portTASK_USES_FLOATING_POINT() vPortTaskUsesDPFPU()
186 #endif /* PORTMACRO_H */