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
36 /*-----------------------------------------------------------
37 * Port specific definitions.
39 * The settings in this file configure FreeRTOS correctly for the
40 * given hardware and compiler.
42 * These settings should not be altered.
43 *-----------------------------------------------------------
46 /* The compiler needs to be told functions that are only referenced by pointer
47 * are to be included in the build. NOTE: Omitting these lines will result in a
48 * run-time crash, not a linker error! */
49 #pragma funcall vTaskStartScheduler prvIdleTask
50 #pragma funcall xTimerCreateTimerTask prvTimerTask
52 /* Type definitions. */
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 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
78 /*-----------------------------------------------------------*/
80 /* Architecture specifics. */
81 #define portSTACK_GROWTH ( -1 )
82 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
83 #define portBYTE_ALIGNMENT 8
84 /*-----------------------------------------------------------*/
86 /* Scheduler utilities. */
89 /* Set a PendSV to request a context switch. */ \
90 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
92 /* Barriers are normally not required but do ensure the code is completely \
93 * within the specified behaviour for the architecture. */ \
98 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
99 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
100 #define portEND_SWITCHING_ISR( xSwitchRequired ) do { if( xSwitchRequired != pdFALSE ) portYIELD(); } while( 0 )
101 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
102 /*-----------------------------------------------------------*/
104 /* Critical section management. */
105 extern void vPortEnterCritical( void );
106 extern void vPortExitCritical( void );
107 #define portDISABLE_INTERRUPTS() CPU_REG_SET( CPU_BASEPRI, configMAX_SYSCALL_INTERRUPT_PRIORITY ); __asm{ dsb }; __asm{ isb }
108 #define portENABLE_INTERRUPTS() CPU_REG_SET( CPU_BASEPRI, 0 );
109 #define portENTER_CRITICAL() vPortEnterCritical()
110 #define portEXIT_CRITICAL() vPortExitCritical()
111 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
112 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) CPU_REG_SET( CPU_BASEPRI, x ); /* Barrier instructions not used as this is only used to lower the basepri. */
114 /*-----------------------------------------------------------*/
116 /* Task function macros as described on the FreeRTOS.org WEB site. These are
117 * not necessary for to use this port. They are defined so the common demo files
118 * (which build with all the ports) will build. */
119 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
120 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
121 /*-----------------------------------------------------------*/
123 /* Tickless idle/low power functionality. */
124 #ifndef portSUPPRESS_TICKS_AND_SLEEP
125 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
126 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
128 /*-----------------------------------------------------------*/
130 /* Architecture specific optimisations. */
131 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
132 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
135 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
137 /* Generic helper function. */
138 __attribute__( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )
142 __asm volatile ( "clz %0, %1" : "=r" ( ucReturn ) : "r" ( ulBitmap ) );
147 /* Check the configuration. */
148 #if ( configMAX_PRIORITIES > 32 )
149 #error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32. It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
152 /* Store/clear the ready priorities in a bit map. */
153 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
154 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
156 /*-----------------------------------------------------------*/
158 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) ucPortCountLeadingZeros( ( uxReadyPriorities ) ) )
160 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
162 /*-----------------------------------------------------------*/
165 void vPortValidateInterruptPriority( void );
166 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
169 /* portNOP() is not required by this port. */
172 BaseType_t xPortIsInsideInterrupt( void );
174 /*-----------------------------------------------------------*/
176 static inline uint32_t ulPortRaiseBASEPRI( void )
178 uint32_t ulOriginalBASEPRI;
180 ulOriginalBASEPRI = CPU_REG_GET( CPU_BASEPRI );
181 CPU_REG_SET( CPU_BASEPRI, configMAX_SYSCALL_INTERRUPT_PRIORITY );
184 return ulOriginalBASEPRI;
186 /*-----------------------------------------------------------*/
192 #endif /* PORTMACRO_H */