1 /* 2 * FreeRTOS Kernel V11.1.0 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 #ifndef INC_PICOLIBC_FREERTOS_H 30 #define INC_PICOLIBC_FREERTOS_H 31 32 /* Use picolibc TLS support to allocate space for __thread variables, 33 * initialize them at thread creation and set the TLS context at 34 * thread switch time. 35 * 36 * See the picolibc TLS docs: 37 * https://github.com/picolibc/picolibc/blob/main/doc/tls.md 38 * for additional information. */ 39 40 #include <picotls.h> 41 42 #define configUSE_C_RUNTIME_TLS_SUPPORT 1 43 44 #define configTLS_BLOCK_TYPE void * 45 46 #define picolibcTLS_SIZE ( ( portPOINTER_SIZE_TYPE ) _tls_size() ) 47 #define picolibcSTACK_ALIGNMENT_MASK ( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) 48 49 #if __PICOLIBC_MAJOR__ > 1 || __PICOLIBC_MINOR__ >= 8 50 51 /* Picolibc 1.8 and newer have explicit alignment values provided 52 * by the _tls_align() inline */ 53 #define picolibcTLS_ALIGNMENT_MASK ( ( portPOINTER_SIZE_TYPE ) ( _tls_align() - 1 ) ) 54 #else 55 56 /* For older Picolibc versions, use the general port alignment value */ 57 #define picolibcTLS_ALIGNMENT_MASK ( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) 58 #endif 59 60 /* Allocate thread local storage block off the end of the 61 * stack. The picolibcTLS_SIZE macro returns the size (in 62 * bytes) of the total TLS area used by the application. 63 * Calculate the top of stack address. */ 64 #if ( portSTACK_GROWTH < 0 ) 65 66 #define configINIT_TLS_BLOCK( xTLSBlock, pxTopOfStack ) \ 67 do { \ 68 xTLSBlock = ( void * ) ( ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack ) - \ 69 picolibcTLS_SIZE ) & \ 70 ~picolibcTLS_ALIGNMENT_MASK ); \ 71 pxTopOfStack = ( StackType_t * ) ( ( ( ( portPOINTER_SIZE_TYPE ) xTLSBlock ) - 1 ) & \ 72 ~picolibcSTACK_ALIGNMENT_MASK ); \ 73 _init_tls( xTLSBlock ); \ 74 } while( 0 ) 75 #else /* portSTACK_GROWTH */ 76 #define configINIT_TLS_BLOCK( xTLSBlock, pxTopOfStack ) \ 77 do { \ 78 xTLSBlock = ( void * ) ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack + \ 79 picolibcTLS_ALIGNMENT_MASK ) & ~picolibcTLS_ALIGNMENT_MASK ); \ 80 pxTopOfStack = ( StackType_t * ) ( ( ( ( ( portPOINTER_SIZE_TYPE ) xTLSBlock ) + \ 81 picolibcTLS_SIZE ) + picolibcSTACK_ALIGNMENT_MASK ) & \ 82 ~picolibcSTACK_ALIGNMENT_MASK ); \ 83 _init_tls( xTLSBlock ); \ 84 } while( 0 ) 85 #endif /* portSTACK_GROWTH */ 86 87 #define configSET_TLS_BLOCK( xTLSBlock ) _set_tls( xTLSBlock ) 88 89 #define configDEINIT_TLS_BLOCK( xTLSBlock ) 90 91 #endif /* INC_PICOLIBC_FREERTOS_H */ 92
