rtai_shm.h

rtai-3.1-test3的源代码(Real-Time Application Interface )

/*
COPYRIGHT (C) 2000  Paolo Mantegazza ([e-mail])

Port to ARM Copyright (c) 2001 Alex Z黳ke, SYSGO RTS GmbH ([e-mail])

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
*/


#ifndef RTAI_SHM_ASM_H
#define RTAI_SHM_ASM_H

#undef __SHM_USE_VECTOR // until we implement it for arm...
#define RTAI_SHM_VECTOR      0xFD

#ifndef __KERNEL__

#define RTAI_SRQ_MAGIC	"0x404404"

#ifdef __SHM_USE_VECTOR
static inline long long rtai_shmrq(unsigned long srq, unsigned long whatever)
{
	long long retval;
	register unsigned long __sc_0 __asm__ ("r0") = srq | (RTAI_SHM_VECTOR << 24);
	register unsigned long __sc_1 __asm__ ("r1") = whatever;

	__asm__ __volatile__ (
	"swi\t" RTAI_SRQ_MAGIC "\n\t"
		: "=&r" (__sc_0), "=&r" (__sc_1)
		: "0" (__sc_0), "1" (__sc_1)
		: "r0", "r1");
	((unsigned long *)&retval)[0] = __sc_0;
	((unsigned long *)&retval)[1] = __sc_1;
	return retval;
}
#endif

#else

#define RTAI_SHM_HANDLER shm_handler

#define DEFINE_SHM_HANDLER

#endif 

#endif