nrf_svc.h

/*
 * Copyright (c) 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
 
#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\"")      \
  _Pragma("GCC diagnostic ignored \"-Wunused-parameter\"") \
  __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__