2 * FreeRTOS SMP Kernel V202110.00
3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * https://www.FreeRTOS.org
23 * https://github.com/FreeRTOS
35 /*-----------------------------------------------------------
36 * Port specific definitions.
38 * The settings in this file configure FreeRTOS correctly for the given hardware
41 * These settings should not be altered.
42 *-----------------------------------------------------------
45 /* Type definitions. */
47 #define portFLOAT float
48 #define portDOUBLE double
50 #define portSHORT short
51 #define portSTACK_TYPE uint32_t
52 #define portBASE_TYPE long
54 typedef portSTACK_TYPE StackType_t;
55 typedef long BaseType_t;
56 typedef unsigned long UBaseType_t;
58 typedef uint32_t TickType_t;
59 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
61 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
62 not need to be guarded with a critical section. */
63 #define portTICK_TYPE_IS_ATOMIC 1
65 /*-----------------------------------------------------------*/
67 /* Hardware specifics. */
68 #define portSTACK_GROWTH ( -1 )
69 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
70 #define portBYTE_ALIGNMENT 8
72 /*-----------------------------------------------------------*/
76 /* Called at the end of an ISR that can cause a context switch. */
77 #define portEND_SWITCHING_ISR( xSwitchRequired )\
79 extern volatile uint32_t ulPortYieldRequired; \
81 if( xSwitchRequired != pdFALSE ) \
83 ulPortYieldRequired = pdTRUE; \
87 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
88 #define portYIELD() __asm volatile ( "SWI 0 \n" \
89 "ISB " ::: "memory" );
92 /*-----------------------------------------------------------
93 * Critical section control
94 *----------------------------------------------------------*/
96 extern void vPortEnterCritical( void );
97 extern void vPortExitCritical( void );
98 extern uint32_t ulPortSetInterruptMask( void );
99 extern void vPortClearInterruptMask( uint32_t ulNewMaskValue );
100 extern void vPortInstallFreeRTOSVectorTable( void );
102 /* The I bit within the CPSR. */
103 #define portINTERRUPT_ENABLE_BIT ( 1 << 7 )
105 /* In the absence of a priority mask register, these functions and macros
106 globally enable and disable interrupts. */
107 #define portENTER_CRITICAL() vPortEnterCritical();
108 #define portEXIT_CRITICAL() vPortExitCritical();
109 #define portENABLE_INTERRUPTS() __asm volatile ( "CPSIE i \n" ::: "memory" );
110 #define portDISABLE_INTERRUPTS() __asm volatile ( "CPSID i \n" \
112 "ISB " ::: "memory" );
114 __attribute__( ( always_inline ) ) static __inline uint32_t portINLINE_SET_INTERRUPT_MASK_FROM_ISR( void )
116 volatile uint32_t ulCPSR;
118 __asm volatile ( "MRS %0, CPSR" : "=r" (ulCPSR) :: "memory" );
119 ulCPSR &= portINTERRUPT_ENABLE_BIT;
120 portDISABLE_INTERRUPTS();
124 #define portSET_INTERRUPT_MASK_FROM_ISR() portINLINE_SET_INTERRUPT_MASK_FROM_ISR()
125 #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) if( x == 0 ) portENABLE_INTERRUPTS()
127 /*-----------------------------------------------------------*/
129 /* Task function macros as described on the FreeRTOS.org WEB site. These are
130 not required for this port but included in case common demo code that uses these
132 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
133 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
135 /* Tickless idle/low power functionality. */
136 #ifndef portSUPPRESS_TICKS_AND_SLEEP
137 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
138 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
141 /* Prototype of the FreeRTOS tick handler. This must be installed as the
142 handler for whichever peripheral is used to generate the RTOS tick. */
143 void FreeRTOS_Tick_Handler( void );
145 /* Any task that uses the floating point unit MUST call vPortTaskUsesFPU()
146 before any floating point instructions are executed. */
147 void vPortTaskUsesFPU( void );
148 #define portTASK_USES_FLOATING_POINT() vPortTaskUsesFPU()
150 #define portLOWEST_INTERRUPT_PRIORITY ( ( ( uint32_t ) configUNIQUE_INTERRUPT_PRIORITIES ) - 1UL )
151 #define portLOWEST_USABLE_INTERRUPT_PRIORITY ( portLOWEST_INTERRUPT_PRIORITY - 1UL )
153 /* Architecture specific optimisations. */
154 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
155 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
158 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
160 /* Store/clear the ready priorities in a bit map. */
161 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
162 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
164 /*-----------------------------------------------------------*/
166 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) __builtin_clz( uxReadyPriorities ) )
168 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
170 #define portNOP() __asm volatile( "NOP" )
171 #define portINLINE __inline
173 #define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )
180 #endif /* PORTMACRO_H */