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 #include <intrinsics.h>
41 /*-----------------------------------------------------------
42 * Port specific definitions.
44 * The settings in this file configure FreeRTOS correctly for the
45 * given hardware and compiler.
47 * These settings should not be altered.
48 *-----------------------------------------------------------
51 /* Type definitions - these are a bit legacy and not really used now, other than
52 * portSTACK_TYPE and portBASE_TYPE. */
54 #define portFLOAT float
55 #define portDOUBLE double
57 #define portSHORT short
58 #define portSTACK_TYPE uint32_t
59 #define portBASE_TYPE long
61 typedef portSTACK_TYPE StackType_t;
62 typedef long BaseType_t;
63 typedef unsigned long UBaseType_t;
66 #if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
67 typedef uint16_t TickType_t;
68 #define portMAX_DELAY ( TickType_t ) 0xffff
69 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
70 typedef uint32_t TickType_t;
71 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
73 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
74 * not need to be guarded with a critical section. */
75 #define portTICK_TYPE_IS_ATOMIC 1
77 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
79 /*-----------------------------------------------------------*/
81 /* Hardware specifics. */
82 #define portBYTE_ALIGNMENT 8 /* Could make four, according to manual. */
83 #define portSTACK_GROWTH -1
84 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
85 #define portNOP() __no_operation()
87 /* Yield equivalent to "*portITU_SWINTR = 0x01; ( void ) *portITU_SWINTR;"
88 * where portITU_SWINTR is the location of the software interrupt register
89 * (0x000872E0). Don't rely on the assembler to select a register, so instead
90 * save and restore clobbered registers manually. */
95 "MOV.L #0x872E0, R10 \n" \
96 "MOV.B #0x1, [R10] \n" \
97 "MOV.L [R10], R10 \n" \
101 #define portYIELD_FROM_ISR( x ) do { if( ( x ) != pdFALSE ) portYIELD( ); } while( 0 )
103 /* These macros should not be called directly, but through the
104 * taskENTER_CRITICAL() and taskEXIT_CRITICAL() macros. An extra check is
105 * performed if configASSERT() is defined to ensure an assertion handler does not
106 * inadvertently attempt to lower the IPL when the call to assert was triggered
107 * because the IPL value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY
108 * when an ISR safe FreeRTOS API function was executed. ISR safe FreeRTOS API
109 * functions are those that end in FromISR. FreeRTOS maintains a separate
110 * interrupt API to ensure API function and interrupt entry is as fast and as
111 * simple as possible. */
112 #define portENABLE_INTERRUPTS() __set_interrupt_level( ( uint8_t ) 0 )
113 #if ( configASSERT_DEFINED == 1 )
114 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() configASSERT( ( __get_interrupt_level() <= configMAX_SYSCALL_INTERRUPT_PRIORITY ) )
115 #define portDISABLE_INTERRUPTS() if( __get_interrupt_level() < configMAX_SYSCALL_INTERRUPT_PRIORITY ) __set_interrupt_level( ( uint8_t ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
117 #define portDISABLE_INTERRUPTS() __set_interrupt_level( ( uint8_t ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
120 /* Critical nesting counts are stored in the TCB. */
121 #define portCRITICAL_NESTING_IN_TCB ( 1 )
123 /* The critical nesting functions defined within tasks.c. */
124 extern void vTaskEnterCritical( void );
125 extern void vTaskExitCritical( void );
126 #define portENTER_CRITICAL() vTaskEnterCritical()
127 #define portEXIT_CRITICAL() vTaskExitCritical()
129 /* As this port allows interrupt nesting... */
130 #define portSET_INTERRUPT_MASK_FROM_ISR() __get_interrupt_level(); portDISABLE_INTERRUPTS()
131 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ) __set_interrupt_level( ( uint8_t ) ( uxSavedInterruptStatus ) )
133 /*-----------------------------------------------------------*/
135 /* Task function macros as described on the FreeRTOS.org WEB site. */
136 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
137 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
139 /* Prevent warnings of undefined behaviour: the order of volatile accesses is
140 * undefined - all warnings have been manually checked and are not an issue, and
141 * the warnings cannot be prevent by code changes without undesirable effects. */
142 #pragma diag_suppress=Pa082
150 #endif /* PORTMACRO_H */