/* 
 * Copyright (c) 2000 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 or object form under this license must not be reverse 
 *      engineered, decompiled, modified and/or disassembled. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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\"")   \
  __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__
