2 * FreeRTOS Kernel V10.4.4
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
36 /*-----------------------------------------------------------
37 * Port specific definitions.
39 * The settings in this file configure FreeRTOS correctly for the given hardware
42 * These settings should not be altered.
43 *-----------------------------------------------------------
46 /* Type definitions. */
48 #define portFLOAT float
49 #define portDOUBLE double
51 #define portSHORT short
52 #define portSTACK_TYPE uint32_t
53 #define portBASE_TYPE long
55 typedef portSTACK_TYPE StackType_t;
56 typedef long BaseType_t;
57 typedef unsigned long UBaseType_t;
59 typedef uint32_t TickType_t;
60 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
62 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
63 not need to be guarded with a critical section. */
64 #define portTICK_TYPE_IS_ATOMIC 1
66 /*-----------------------------------------------------------*/
68 /* Hardware specifics. */
69 #define portSTACK_GROWTH ( -1 )
70 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
71 #define portBYTE_ALIGNMENT 8
73 /*-----------------------------------------------------------*/
77 /* Called at the end of an ISR that can cause a context switch. */
78 #define portEND_SWITCHING_ISR( xSwitchRequired )\
80 extern volatile uint32_t ulPortYieldRequired; \
82 if( xSwitchRequired != pdFALSE ) \
84 ulPortYieldRequired = pdTRUE; \
88 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
89 #define portYIELD() __asm volatile ( "SWI 0 \n" \
90 "ISB " ::: "memory" );
93 /*-----------------------------------------------------------
94 * Critical section control
95 *----------------------------------------------------------*/
97 extern void vPortEnterCritical( void );
98 extern void vPortExitCritical( void );
99 extern uint32_t ulPortSetInterruptMask( void );
100 extern void vPortClearInterruptMask( uint32_t ulNewMaskValue );
101 extern void vPortInstallFreeRTOSVectorTable( void );
103 /* The I bit within the CPSR. */
104 #define portINTERRUPT_ENABLE_BIT ( 1 << 7 )
106 /* In the absence of a priority mask register, these functions and macros
107 globally enable and disable interrupts. */
108 #define portENTER_CRITICAL() vPortEnterCritical();
109 #define portEXIT_CRITICAL() vPortExitCritical();
110 #define portENABLE_INTERRUPTS() __asm volatile ( "CPSIE i \n" ::: "memory" );
111 #define portDISABLE_INTERRUPTS() __asm volatile ( "CPSID i \n" \
113 "ISB " ::: "memory" );
115 __attribute__( ( always_inline ) ) static __inline uint32_t portINLINE_SET_INTERRUPT_MASK_FROM_ISR( void )
117 volatile uint32_t ulCPSR;
119 __asm volatile ( "MRS %0, CPSR" : "=r" (ulCPSR) :: "memory" );
120 ulCPSR &= portINTERRUPT_ENABLE_BIT;
121 portDISABLE_INTERRUPTS();
125 #define portSET_INTERRUPT_MASK_FROM_ISR() portINLINE_SET_INTERRUPT_MASK_FROM_ISR()
126 #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) do { if( x == 0 ) portENABLE_INTERRUPTS(); } while( 0 )
128 /*-----------------------------------------------------------*/
130 /* Task function macros as described on the FreeRTOS.org WEB site. These are
131 not required for this port but included in case common demo code that uses these
133 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
134 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
136 /* Tickless idle/low power functionality. */
137 #ifndef portSUPPRESS_TICKS_AND_SLEEP
138 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
139 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
142 /* Prototype of the FreeRTOS tick handler. This must be installed as the
143 handler for whichever peripheral is used to generate the RTOS tick. */
144 void FreeRTOS_Tick_Handler( void );
146 /* Any task that uses the floating point unit MUST call vPortTaskUsesFPU()
147 before any floating point instructions are executed. */
148 void vPortTaskUsesFPU( void );
149 #define portTASK_USES_FLOATING_POINT() vPortTaskUsesFPU()
151 #define portLOWEST_INTERRUPT_PRIORITY ( ( ( uint32_t ) configUNIQUE_INTERRUPT_PRIORITIES ) - 1UL )
152 #define portLOWEST_USABLE_INTERRUPT_PRIORITY ( portLOWEST_INTERRUPT_PRIORITY - 1UL )
154 /* Architecture specific optimisations. */
155 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
156 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
159 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
161 /* Store/clear the ready priorities in a bit map. */
162 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
163 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
165 /*-----------------------------------------------------------*/
167 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) __builtin_clz( uxReadyPriorities ) )
169 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
171 #define portNOP() __asm volatile( "NOP" )
172 #define portINLINE __inline
174 #define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )
181 #endif /* PORTMACRO_H */