rtai-core/include/asm-arm/rtai_srq.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_SRQ_H_
00023 #define _RTAI_SRQ_H_
00024 
00025 #define RTAI_SRQ_MAGIC  "0x404404"
00026 
00027 static inline long long rtai_srq(unsigned long srq, unsigned long whatever)
00028 {
00029         long long retval;
00030         register unsigned long __sc_0 __asm__ ("r0") = srq;
00031         register unsigned long __sc_1 __asm__ ("r1") = whatever;
00032 
00033         __asm__ __volatile__ (
00034         "swi\t" RTAI_SRQ_MAGIC "\n\t"
00035                 : "=r" (__sc_0), "=r" (__sc_1)
00036                 : "0" (__sc_0), "1" (__sc_1)
00037                 );
00038         ((unsigned long *)&retval)[0] = __sc_0;
00039         ((unsigned long *)&retval)[1] = __sc_1;
00040         return retval;
00041 }
00042 
00043 static inline int rtai_open_srq(unsigned int label)
00044 {
00045         return (int)rtai_srq(0, label);
00046 }
00047 #endif

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