nrf_svc.h

00001 /*
00002  * Copyright (c) Nordic Semiconductor ASA
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without modification,
00006  * are permitted provided that the following conditions are met:
00007  *
00008  *   1. Redistributions of source code must retain the above copyright notice, this
00009  *   list of conditions and the following disclaimer.
00010  *
00011  *   2. Redistributions in binary form must reproduce the above copyright notice, this
00012  *   list of conditions and the following disclaimer in the documentation and/or
00013  *   other materials provided with the distribution.
00014  *
00015  *   3. Neither the name of Nordic Semiconductor ASA nor the names of other
00016  *   contributors to this software may be used to endorse or promote products
00017  *   derived from this software without specific prior written permission.
00018  *
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
00021  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00022  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00023  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00024  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00025  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00026  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
00027  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00028  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030  *
00031  */
00032  
00033 #ifndef NRF_SVC__
00034 #define NRF_SVC__
00035 
00036 #ifdef SVCALL_AS_NORMAL_FUNCTION
00037 #define SVCALL(number, return_type, signature) return_type signature
00038 #else
00039 
00040 #ifndef SVCALL
00041 #if defined (__CC_ARM)
00042 #define SVCALL(number, return_type, signature) return_type __svc(number) signature
00043 #elif defined (__GNUC__)
00044 #define SVCALL(number, return_type, signature) \
00045   _Pragma("GCC diagnostic ignored \"-Wunused-function\"") \
00046   _Pragma("GCC diagnostic push") \
00047   _Pragma("GCC diagnostic ignored \"-Wreturn-type\"") \
00048   __attribute__((naked)) static return_type signature \
00049   { \
00050     __asm( \
00051         "svc %0\n" \
00052         "bx r14" : : "I" ((uint32_t)number) : "r0" \
00053     ); \
00054   }    \
00055   _Pragma("GCC diagnostic pop")
00056 #elif defined (__ICCARM__)
00057 #define PRAGMA(x) _Pragma(#x)
00058 #define SVCALL(number, return_type, signature) \
00059 PRAGMA(swi_number = number) \
00060  __swi return_type signature;
00061 #else
00062 #define SVCALL(number, return_type, signature) return_type signature  
00063 #endif
00064 #endif  // SVCALL
00065 
00066 #endif  // SVCALL_AS_NORMAL_FUNCTION
00067 #endif  // NRF_SVC__