
/*====================================================================
 * os_convert.h
 *
 * Copyright 1995, Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
 * Inc.; the contents of this file may not be disclosed to third
 * parties, copied or duplicated in any form, in whole or in part,
 * without the prior written permission of Silicon Graphics, Inc.
 *
 * RESTRICTED RIGHTS LEGEND:
 * Use, duplication or disclosure by the Government is subject to
 * restrictions as set forth in subdivision (c)(1)(ii) of the Rights
 * in Technical Data and Computer Software clause at DFARS
 * 252.227-7013, and/or in similar or successor clauses in the FAR,
 * DOD or NASA FAR Supplement. Unpublished - rights reserved under the
 * Copyright Laws of the United States.
 *====================================================================*/

/*---------------------------------------------------------------------*
        Copyright (C) 1998 Nintendo. (Originated by SGI)
        
        $RCSfile: os_convert.h,v $
        $Revision: 1.2 $
        $Date: 1999/04/21 02:53:11 $
 *---------------------------------------------------------------------*/

#ifndef _OS_CONVERT_H_
#define	_OS_CONVERT_H_

#ifdef _LANGUAGE_C_PLUS_PLUS
extern "C" {
#endif

#include <PR/ultratypes.h>
#include <PR/os_version.h>

#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

/**************************************************************************
 *
 * Type definitions
 *
 */


#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

/**************************************************************************
 *
 * Global definitions
 *
 */

#define	OS_CLOCK_RATE		62500000LL
#define	OS_CPU_COUNTER		(OS_CLOCK_RATE*3/4)


#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

/**************************************************************************
 *
 * Macro definitions
 *
 */

#if LIBULTRA_VERSION > OS_VER_H
#define OS_NSEC_TO_CYCLES(n)	(((u64)(n)*(OS_CPU_COUNTER/15625000LL))/(1000000000LL/15625000LL))
#define OS_USEC_TO_CYCLES(n)	(((u64)(n)*(OS_CPU_COUNTER/15625LL))/(1000000LL/15625LL))
#define OS_CYCLES_TO_NSEC(c)	(((u64)(c)*(1000000000LL/15625000LL))/(OS_CPU_COUNTER/15625000LL))
#define OS_CYCLES_TO_USEC(c)	(((u64)(c)*(1000000LL/15625LL))/(OS_CPU_COUNTER/15625LL))
#else
#define OS_NSEC_TO_CYCLES(n)	(((u64)(n)*(osClockRate))/(1000000000LL))
#define OS_USEC_TO_CYCLES(n)	(((u64)(n)*(osClockRate))/(1000000LL))
#define OS_CYCLES_TO_NSEC(c)	(((u64)(c)*(1000000000LL))/(osClockRate))
#define OS_CYCLES_TO_USEC(c)	(((u64)(c)*(1000000LL))/(osClockRate))
#endif

/* OS_K?_TO_PHYSICAL macro bug fix for CodeWarrior */
#ifndef __MWERKS__
#define	OS_K0_TO_PHYSICAL(x)	(u32)(((char *)(x)-0x80000000))
#define	OS_K1_TO_PHYSICAL(x)	(u32)(((char *)(x)-0xa0000000))
#else
#define	OS_K0_TO_PHYSICAL(x)	((char *)(x)-0x80000000)
#define	OS_K1_TO_PHYSICAL(x)	((char *)(x)-0xa0000000)
#endif

#define	OS_PHYSICAL_TO_K0(x)	(void *)(((u32)(x)+0x80000000))
#define	OS_PHYSICAL_TO_K1(x)	(void *)(((u32)(x)+0xa0000000))


/**************************************************************************
 *
 * Extern variables
 *
 */


/**************************************************************************
 *
 * Function prototypes
 *
 */

/* Address translation routines and macros */

extern uintptr_t	osVirtualToPhysical(void *);
extern void *		 osPhysicalToVirtual(u32);


#endif  /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

#ifdef _LANGUAGE_C_PLUS_PLUS
}
#endif

#endif /* !_OS_CONVERT_H_ */
