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
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;
65 #if( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
66 typedef uint16_t TickType_t;
67 #define portMAX_DELAY ( TickType_t ) 0xffff
68 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
69 typedef uint32_t TickType_t;
70 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
72 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
73 not need to be guarded with a critical section. */
74 #define portTICK_TYPE_IS_ATOMIC 1
76 /*-----------------------------------------------------------*/
78 /* Hardware specifics. */
79 #define portBYTE_ALIGNMENT 8
80 #define portSTACK_GROWTH -1
81 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
82 #define portNOP() nop()
83 #define portSTART_SCHEDULER_TRAP_NO ( 32 )
84 #define portYIELD_TRAP_NO ( 33 )
85 #define portKERNEL_INTERRUPT_PRIORITY ( 1 )
87 void vPortYield( void );
88 #define portYIELD() vPortYield()
90 extern void vTaskSwitchContext( void );
91 #define portYIELD_FROM_ISR( x ) do { if( x != pdFALSE ) vTaskSwitchContext(); } while( 0 )
94 * This function tells the kernel that the task referenced by xTask is going to
95 * use the floating point registers and therefore requires the floating point
96 * registers saved as part of its context.
98 BaseType_t xPortUsesFloatingPoint( void* xTask );
101 * The flop save and restore functions are defined in portasm.src and called by
102 * the trace "task switched in" and "trace task switched out" macros.
104 void vPortSaveFlopRegisters( void *pulBuffer );
105 void vPortRestoreFlopRegisters( void *pulBuffer );
108 * pxTaskTag is used to point to the buffer into which the floating point
109 * context should be saved. If pxTaskTag is NULL then the task does not use
110 * a floating point context.
112 #define traceTASK_SWITCHED_OUT() do { if( pxCurrentTCB->pxTaskTag != NULL ) vPortSaveFlopRegisters( pxCurrentTCB->pxTaskTag ); } while( 0 )
113 #define traceTASK_SWITCHED_IN() do { if( pxCurrentTCB->pxTaskTag != NULL ) vPortRestoreFlopRegisters( pxCurrentTCB->pxTaskTag ); } while( 0 )
116 * These macros should be called directly, but through the taskENTER_CRITICAL()
117 * and taskEXIT_CRITICAL() macros.
119 #define portENABLE_INTERRUPTS() set_imask( 0x00 )
120 #define portDISABLE_INTERRUPTS() set_imask( portKERNEL_INTERRUPT_PRIORITY )
122 /* Critical nesting counts are stored in the TCB. */
123 #define portCRITICAL_NESTING_IN_TCB ( 1 )
125 /* The critical nesting functions defined within tasks.c. */
126 extern void vTaskEnterCritical( void );
127 extern void vTaskExitCritical( void );
128 #define portENTER_CRITICAL() vTaskEnterCritical();
129 #define portEXIT_CRITICAL() vTaskExitCritical();
131 /*-----------------------------------------------------------*/
133 /* Task function macros as described on the FreeRTOS.org WEB site. */
134 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
135 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
143 #endif /* PORTMACRO_H */