rtai-core/include/asm-arm/rtai_shm.h

00001 /*
00002 COPYRIGHT (C) 2000  Paolo Mantegazza (mantegazza@aero.polimi.it)
00003 
00004 Port to ARM Copyright (c) 2001 Alex Züpke, SYSGO RTS GmbH (azu@sysgo.de)
00005 
00006 This library is free software; you can redistribute it and/or
00007 modify it under the terms of the GNU Lesser General Public
00008 License as published by the Free Software Foundation; either
00009 version 2 of the License, or (at your option) any later version.
00010 
00011 This library is distributed in the hope that it will be useful,
00012 but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 Lesser General Public License for more details.
00015 
00016 You should have received a copy of the GNU Lesser General Public
00017 License along with this library; if not, write to the Free Software
00018 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
00019 */
00020 
00021 
00022 #ifndef RTAI_SHM_ASM_H
00023 #define RTAI_SHM_ASM_H
00024 
00025 #undef __SHM_USE_VECTOR // until we implement it for arm...
00026 #define RTAI_SHM_VECTOR      0xFD
00027 
00028 #ifndef __KERNEL__
00029 
00030 #define RTAI_SRQ_MAGIC  "0x404404"
00031 
00032 #ifdef __SHM_USE_VECTOR
00033 static inline long long rtai_shmrq(unsigned long srq, unsigned long whatever)
00034 {
00035         long long retval;
00036         register unsigned long __sc_0 __asm__ ("r0") = srq | (RTAI_SHM_VECTOR << 24);
00037         register unsigned long __sc_1 __asm__ ("r1") = whatever;
00038 
00039         __asm__ __volatile__ (
00040         "swi\t" RTAI_SRQ_MAGIC "\n\t"
00041                 : "=&r" (__sc_0), "=&r" (__sc_1)
00042                 : "0" (__sc_0), "1" (__sc_1)
00043                 : "r0", "r1");
00044         ((unsigned long *)&retval)[0] = __sc_0;
00045         ((unsigned long *)&retval)[1] = __sc_1;
00046         return retval;
00047 }
00048 #endif
00049 
00050 #else
00051 
00052 #define RTAI_SHM_HANDLER shm_handler
00053 
00054 #define DEFINE_SHM_HANDLER
00055 
00056 #endif 
00057 
00058 #endif 

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