feat: initial

include/picolibc-freertos.h

@@ -0,0 +1,91 @@
+/*
+ * FreeRTOS Kernel V11.1.0
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef INC_PICOLIBC_FREERTOS_H
+#define INC_PICOLIBC_FREERTOS_H
+
+/* Use picolibc TLS support to allocate space for __thread variables,
+ * initialize them at thread creation and set the TLS context at
+ * thread switch time.
+ *
+ * See the picolibc TLS docs:
+ * https://github.com/picolibc/picolibc/blob/main/doc/tls.md
+ * for additional information. */
+
+#include <picotls.h>
+
+#define configUSE_C_RUNTIME_TLS_SUPPORT    1
+
+#define configTLS_BLOCK_TYPE               void *
+
+#define picolibcTLS_SIZE                   ( ( portPOINTER_SIZE_TYPE ) _tls_size() )
+#define picolibcSTACK_ALIGNMENT_MASK       ( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK )
+
+#if __PICOLIBC_MAJOR__ > 1 || __PICOLIBC_MINOR__ >= 8
+
+/* Picolibc 1.8 and newer have explicit alignment values provided
+ * by the _tls_align() inline */
+    #define picolibcTLS_ALIGNMENT_MASK    ( ( portPOINTER_SIZE_TYPE ) ( _tls_align() - 1 ) )
+#else
+
+/* For older Picolibc versions, use the general port alignment value */
+    #define picolibcTLS_ALIGNMENT_MASK    ( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK )
+#endif
+
+/* Allocate thread local storage block off the end of the
+ * stack. The picolibcTLS_SIZE macro returns the size (in
+ * bytes) of the total TLS area used by the application.
+ * Calculate the top of stack address. */
+#if ( portSTACK_GROWTH < 0 )
+
+    #define configINIT_TLS_BLOCK( xTLSBlock, pxTopOfStack )                                  \
+    do {                                                                                     \
+        xTLSBlock = ( void * ) ( ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack ) -              \
+                                   picolibcTLS_SIZE ) &                                      \
+                                 ~picolibcTLS_ALIGNMENT_MASK );                              \
+        pxTopOfStack = ( StackType_t * ) ( ( ( ( portPOINTER_SIZE_TYPE ) xTLSBlock ) - 1 ) & \
+                                           ~picolibcSTACK_ALIGNMENT_MASK );                  \
+        _init_tls( xTLSBlock );                                                              \
+    } while( 0 )
+#else /* portSTACK_GROWTH */
+    #define configINIT_TLS_BLOCK( xTLSBlock, pxTopOfStack )                                          \
+    do {                                                                                             \
+        xTLSBlock = ( void * ) ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack +                          \
+                                   picolibcTLS_ALIGNMENT_MASK ) & ~picolibcTLS_ALIGNMENT_MASK );     \
+        pxTopOfStack = ( StackType_t * ) ( ( ( ( ( portPOINTER_SIZE_TYPE ) xTLSBlock ) +             \
+                                               picolibcTLS_SIZE ) + picolibcSTACK_ALIGNMENT_MASK ) & \
+                                           ~picolibcSTACK_ALIGNMENT_MASK );                          \
+        _init_tls( xTLSBlock );                                                                      \
+    } while( 0 )
+#endif /* portSTACK_GROWTH */
+
+#define configSET_TLS_BLOCK( xTLSBlock )    _set_tls( xTLSBlock )
+
+#define configDEINIT_TLS_BLOCK( xTLSBlock )
+
+#endif /* INC_PICOLIBC_FREERTOS_H */