altivec_dy4.h

Curtiss-Wright Controls Embedded Computing公司的cw183板bsp源代码

/* altivec_dy4.h - DY 4 VME-182 board series vxWorks file. */

/**********************************************************************
 *
 *   Copyright (c) 2003-2004, Dy 4 Systems All rights reserved.
 *   This Source Code is the Property of Dy 4 Systems Inc. and can
 *   only be used in accordance with Source Code License
 *   Agreement of Dy 4 Systems Inc. dba (doing business as) 
 *   CURTISS-WRIGHT CONTROLS EMBEDDED COMPUTING, "CWCEC".
 *
 **********************************************************************/

/* Copyright 1984 - 1997 Wind River Systems, Inc. */

/*
modification history
--------------------
01c,02jun03, rgs        Changed file name from altivec.h to altivec_dy4.h.
01b,28may03, rgs        Standard file header added.
01a,17oct00, trc        Initial release.
*/

/*
DESCRIPTION:
Prototypes and constants related to Altivec multi-tasking support.

INCLUDE FILES:

SEE ALSO: altivec.c
*/


#ifndef __ALTIVEC_H__
#define __ALTIVEC_H__


/*
 *  New task create option bit:  this will be superseded 
 *  when wind river supports the Altivec.
 */

#ifndef VX_ALTIVEC
#define VX_ALTIVEC		0x02000000	/* tspawn option	*/
#endif



/*
 *  Save the address of the register save area within
 *  the ALTIVEC_RSAVE field of the TCB.  The register 
 *  save area will be RSAVE_SIZE longwords in length:
 *  32 vector registers, + 4 for vscr, +1 for vrsave.
 */

#define ALTIVEC_RSAVE		spare1
#define ALTIVEC_RSAVE_SIZE	(32*4 + 4 + 1)



/*
 *  Altivec Init function must be called during BSP initialization,
 *  after malloc's are allowed.  This function has no effect when
 *  called from a non-Altivec processor.
 */
void sysAltivecInit (void);



/*
 *  Altivec enable function must be called from tasks wishing to use
 *  the Altivec (unless those tasks were created with the Altivec
 *  option).
 */

int sysAltivecEnable (void);




/*
 *  Context save/restore functions
 */ 

void sysAltivecLoad (void *);
void sysAltivecStore (void *);

#endif