192 lines
6.7 KiB
C
192 lines
6.7 KiB
C
/**
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* Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NRF_SECTION_H__
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#define NRF_SECTION_H__
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#include "nordic_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup section_vars Section variables
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* @ingroup app_common
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* @{
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*
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* @brief Section variables.
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*/
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//lint -save -e27 -esym(526,*)
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#if defined(__ICCARM__)
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// Enable IAR language extensions
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#pragma language=extended
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#endif
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/**@brief Macro for obtaining the address of the beginning of a section.
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*
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* param[in] section_name Name of the section.
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* @hideinitializer
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*/
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#if defined(__CC_ARM)
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#define NRF_SECTION_START_ADDR(section_name) &CONCAT_2(section_name, $$Base)
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#elif defined(__GNUC__)
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#define NRF_SECTION_START_ADDR(section_name) &CONCAT_2(__start_, section_name)
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#elif defined(__ICCARM__)
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#define NRF_SECTION_START_ADDR(section_name) __section_begin(STRINGIFY(section_name))
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#endif
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/**@brief Macro for obtaining the address of the end of a section.
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*
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* @param[in] section_name Name of the section.
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* @hideinitializer
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*/
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#if defined(__CC_ARM)
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#define NRF_SECTION_END_ADDR(section_name) &CONCAT_2(section_name, $$Limit)
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#elif defined(__GNUC__)
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#define NRF_SECTION_END_ADDR(section_name) &CONCAT_2(__stop_, section_name)
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#elif defined(__ICCARM__)
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#define NRF_SECTION_END_ADDR(section_name) __section_end(STRINGIFY(section_name))
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#endif
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/**@brief Macro for retrieving the length of a given section, in bytes.
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*
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* @param[in] section_name Name of the section.
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* @hideinitializer
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*/
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#define NRF_SECTION_LENGTH(section_name) \
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((size_t)NRF_SECTION_END_ADDR(section_name) - \
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(size_t)NRF_SECTION_START_ADDR(section_name))
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/**@brief Macro for creating a section.
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*
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* @param[in] section_name Name of the section.
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* @param[in] data_type Data type of the variables to be registered in the section.
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*
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* @warning Data type must be word aligned to prevent padding.
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* @hideinitializer
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*/
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#if defined(__CC_ARM)
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#define NRF_SECTION_DEF(section_name, data_type) \
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extern data_type * CONCAT_2(section_name, $$Base); \
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extern void * CONCAT_2(section_name, $$Limit)
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#elif defined(__GNUC__)
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#define NRF_SECTION_DEF(section_name, data_type) \
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extern data_type * CONCAT_2(__start_, section_name); \
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extern void * CONCAT_2(__stop_, section_name)
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#elif defined(__ICCARM__)
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#define NRF_SECTION_DEF(section_name, data_type) \
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_Pragma(STRINGIFY(section = STRINGIFY(section_name)));
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#endif
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/**@brief Macro for declaring a variable and registering it in a section.
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*
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* @details Declares a variable and registers it in a named section. This macro ensures that the
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* variable is not stripped away when using optimizations.
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*
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* @note The order in which variables are placed in a section is dependent on the order in
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* which the linker script encounters the variables during linking.
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*
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* @param[in] section_name Name of the section.
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* @param[in] section_var Variable to register in the given section.
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* @hideinitializer
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*/
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#if defined(__CC_ARM)
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#define NRF_SECTION_ITEM_REGISTER(section_name, section_var) \
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section_var __attribute__ ((section(STRINGIFY(section_name)))) __attribute__((used))
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#elif defined(__GNUC__)
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#define NRF_SECTION_ITEM_REGISTER(section_name, section_var) \
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section_var __attribute__ ((section("." STRINGIFY(section_name)))) __attribute__((used))
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#elif defined(__ICCARM__)
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#define NRF_SECTION_ITEM_REGISTER(section_name, section_var) \
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__root section_var @ STRINGIFY(section_name)
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#endif
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/**@brief Macro for retrieving a variable from a section.
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*
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* @warning The stored symbol can only be resolved using this macro if the
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* type of the data is word aligned. The operation of acquiring
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* the stored symbol relies on the size of the stored type. No
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* padding can exist in the named section in between individual
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* stored items or this macro will fail.
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*
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* @param[in] section_name Name of the section.
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* @param[in] data_type Data type of the variable.
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* @param[in] i Index of the variable in section.
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* @hideinitializer
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*/
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#define NRF_SECTION_ITEM_GET(section_name, data_type, i) \
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((data_type*)NRF_SECTION_START_ADDR(section_name) + (i))
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/**@brief Macro for getting the number of variables in a section.
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*
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* @param[in] section_name Name of the section.
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* @param[in] data_type Data type of the variables in the section.
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* @hideinitializer
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*/
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#define NRF_SECTION_ITEM_COUNT(section_name, data_type) \
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NRF_SECTION_LENGTH(section_name) / sizeof(data_type)
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/** @} */
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//lint -restore
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#ifdef __cplusplus
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}
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#endif
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#endif // NRF_SECTION_H__
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