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/*
* Copyright (c) 2012 - 2019, Nordic Semiconductor ASA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef NRF_SVC__
#define NRF_SVC__
#include "stdint.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @brief Supervisor call declaration.
*
* A call to a function marked with @ref SVCALL, will trigger a Supervisor Call (SVC) Exception.
* The SVCs with SVC numbers 0x00-0x0F are forwared to the application. All other SVCs are handled by the SoftDevice.
*
* @param[in] number The SVC number to be used.
* @param[in] return_type The return type of the SVC function.
* @param[in] signature Function signature. The function can have at most four arguments.
*/
#ifdef SVCALL_AS_NORMAL_FUNCTION
#define SVCALL(number, return_type, signature) return_type signature
#else
#ifndef SVCALL
#if defined (__CC_ARM)
#define SVCALL(number, return_type, signature) return_type __svc(number) signature
#elif defined (__GNUC__)
#ifdef __cplusplus
#define GCC_CAST_CPP (uint16_t)
#else
#define GCC_CAST_CPP
#endif
#define SVCALL(number, return_type, signature) \
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wreturn-type\"") \
__attribute__((naked)) \
__attribute__((unused)) \
static return_type signature \
{ \
__asm( \
"svc %0\n" \
"bx r14" : : "I" (GCC_CAST_CPP number) : "r0" \
); \
} \
_Pragma("GCC diagnostic pop")
#elif defined (__ICCARM__)
#define PRAGMA(x) _Pragma(#x)
#define SVCALL(number, return_type, signature) \
PRAGMA(swi_number = (number)) \
__swi return_type signature;
#else
#define SVCALL(number, return_type, signature) return_type signature
#endif
#endif // SVCALL
#endif // SVCALL_AS_NORMAL_FUNCTION
#ifdef __cplusplus
}
#endif
#endif // NRF_SVC__
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