1 /* 2 * FreeRTOS Kernel V10.6.2 3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved. 4 * 5 * SPDX-License-Identifier: MIT 6 * 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: 13 * 14 * The above copyright notice and this permission notice shall be included in all 15 * copies or substantial portions of the Software. 16 * 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. 23 * 24 * https://www.FreeRTOS.org 25 * https://github.com/FreeRTOS 26 * 27 */ 28 29 30 #ifndef PORTMACRO_H 31 #define PORTMACRO_H 32 33 /* *INDENT-OFF* */ 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 /* *INDENT-ON* */ 38 39 /*----------------------------------------------------------- 40 * Port specific definitions. 41 * 42 * The settings in this file configure FreeRTOS correctly for the 43 * given hardware and compiler. 44 * 45 * These settings should not be altered. 46 *----------------------------------------------------------- 47 */ 48 49 /* Type definitions. */ 50 #define portCHAR char 51 #define portFLOAT float 52 #define portDOUBLE double 53 #define portLONG long 54 #define portSHORT short 55 #define portSTACK_TYPE uint8_t 56 #define portBASE_TYPE char 57 58 typedef portSTACK_TYPE StackType_t; 59 typedef signed char BaseType_t; 60 typedef unsigned char UBaseType_t; 61 62 63 #if( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS ) 64 typedef uint16_t TickType_t; 65 #define portMAX_DELAY ( TickType_t ) 0xffff 66 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS ) 67 typedef uint32_t TickType_t; 68 #define portMAX_DELAY ( TickType_t ) ( 0xFFFFFFFFUL ) 69 #else 70 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width. 71 #endif 72 /*-----------------------------------------------------------*/ 73 74 /* Hardware specifics. */ 75 #define portBYTE_ALIGNMENT 1 76 #define portSTACK_GROWTH ( -1 ) 77 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ ) 78 #define portYIELD() __asm( "swi" ); 79 /*-----------------------------------------------------------*/ 80 81 /* Critical section handling. */ 82 #define portENABLE_INTERRUPTS() __asm( "cli" ) 83 #define portDISABLE_INTERRUPTS() __asm( "sei" ) 84 85 /* 86 * Disable interrupts before incrementing the count of critical section nesting. 87 * The nesting count is maintained so we know when interrupts should be 88 * re-enabled. Once interrupts are disabled the nesting count can be accessed 89 * directly. Each task maintains its own nesting count. 90 */ 91 #define portENTER_CRITICAL() \ 92 { \ 93 extern volatile UBaseType_t uxCriticalNesting; \ 94 \ 95 portDISABLE_INTERRUPTS(); \ 96 uxCriticalNesting++; \ 97 } 98 99 /* 100 * Interrupts are disabled so we can access the nesting count directly. If the 101 * nesting is found to be 0 (no nesting) then we are leaving the critical 102 * section and interrupts can be re-enabled. 103 */ 104 #define portEXIT_CRITICAL() \ 105 { \ 106 extern volatile UBaseType_t uxCriticalNesting; \ 107 \ 108 uxCriticalNesting--; \ 109 if( uxCriticalNesting == 0 ) \ 110 { \ 111 portENABLE_INTERRUPTS(); \ 112 } \ 113 } 114 /*-----------------------------------------------------------*/ 115 116 /* Task utilities. */ 117 118 /* 119 * These macros are very simple as the processor automatically saves and 120 * restores its registers as interrupts are entered and exited. In 121 * addition to the (automatically stacked) registers we also stack the 122 * critical nesting count. Each task maintains its own critical nesting 123 * count as it is legitimate for a task to yield from within a critical 124 * section. If the banked memory model is being used then the PPAGE 125 * register is also stored as part of the tasks context. 126 */ 127 128 #ifdef BANKED_MODEL 129 /* 130 * Load the stack pointer for the task, then pull the critical nesting 131 * count and PPAGE register from the stack. The remains of the 132 * context are restored by the RTI instruction. 133 */ 134 #define portRESTORE_CONTEXT() \ 135 { \ 136 __asm( " \n\ 137 .globl pxCurrentTCB ; void * \n\ 138 .globl uxCriticalNesting ; char \n\ 139 \n\ 140 ldx pxCurrentTCB \n\ 141 lds 0,x ; Stack \n\ 142 \n\ 143 movb 1,sp+,uxCriticalNesting \n\ 144 movb 1,sp+,0x30 ; PPAGE \n\ 145 " ); \ 146 } 147 148 /* 149 * By the time this macro is called the processor has already stacked the 150 * registers. Simply stack the nesting count and PPAGE value, then save 151 * the task stack pointer. 152 */ 153 #define portSAVE_CONTEXT() \ 154 { \ 155 __asm( " \n\ 156 .globl pxCurrentTCB ; void * \n\ 157 .globl uxCriticalNesting ; char \n\ 158 \n\ 159 movb 0x30, 1,-sp ; PPAGE \n\ 160 movb uxCriticalNesting, 1,-sp \n\ 161 \n\ 162 ldx pxCurrentTCB \n\ 163 sts 0,x ; Stack \n\ 164 " ); \ 165 } 166 #else 167 168 /* 169 * These macros are as per the BANKED versions above, but without saving 170 * and restoring the PPAGE register. 171 */ 172 173 #define portRESTORE_CONTEXT() \ 174 { \ 175 __asm( " \n\ 176 .globl pxCurrentTCB ; void * \n\ 177 .globl uxCriticalNesting ; char \n\ 178 \n\ 179 ldx pxCurrentTCB \n\ 180 lds 0,x ; Stack \n\ 181 \n\ 182 movb 1,sp+,uxCriticalNesting \n\ 183 " ); \ 184 } 185 186 #define portSAVE_CONTEXT() \ 187 { \ 188 __asm( " \n\ 189 .globl pxCurrentTCB ; void * \n\ 190 .globl uxCriticalNesting ; char \n\ 191 \n\ 192 movb uxCriticalNesting, 1,-sp \n\ 193 \n\ 194 ldx pxCurrentTCB \n\ 195 sts 0,x ; Stack \n\ 196 " ); \ 197 } 198 #endif 199 200 /* 201 * Utility macros to save/restore correct software registers for GCC. This is 202 * useful when GCC does not generate appropriate ISR head/tail code. 203 */ 204 #define portISR_HEAD() \ 205 { \ 206 __asm(" \n\ 207 movw _.frame, 2,-sp \n\ 208 movw _.tmp, 2,-sp \n\ 209 movw _.z, 2,-sp \n\ 210 movw _.xy, 2,-sp \n\ 211 ;movw _.d2, 2,-sp \n\ 212 ;movw _.d1, 2,-sp \n\ 213 "); \ 214 } 215 216 #define portISR_TAIL() \ 217 { \ 218 __asm(" \n\ 219 movw 2,sp+, _.xy \n\ 220 movw 2,sp+, _.z \n\ 221 movw 2,sp+, _.tmp \n\ 222 movw 2,sp+, _.frame \n\ 223 ;movw 2,sp+, _.d1 \n\ 224 ;movw 2,sp+, _.d2 \n\ 225 rti \n\ 226 "); \ 227 } 228 229 /* 230 * Utility macro to call macros above in correct order in order to perform a 231 * task switch from within a standard ISR. This macro can only be used if 232 * the ISR does not use any local (stack) variables. If the ISR uses stack 233 * variables portYIELD() should be used in it's place. 234 */ 235 236 #define portTASK_SWITCH_FROM_ISR() \ 237 portSAVE_CONTEXT(); \ 238 vTaskSwitchContext(); \ 239 portRESTORE_CONTEXT(); 240 241 242 /* Task function macros as described on the FreeRTOS.org WEB site. */ 243 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) 244 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) 245 246 /* *INDENT-OFF* */ 247 #ifdef __cplusplus 248 } 249 #endif 250 /* *INDENT-ON* */ 251 252 #endif /* PORTMACRO_H */ 253
