Subversion Repositories or1k

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2003 by Ralf Baechle

 */

#ifndef __ASM_PREFETCH_H

#define __ASM_PREFETCH_H

/*

 * R5000 and RM5200 implements pref and prefx instructions but they're nops, so

 * rather than wasting time we pretend these processors don't support

 * prefetching at all.

 *

 * R5432 implements Load, Store, LoadStreamed, StoreStreamed, LoadRetained,

 * StoreRetained and WriteBackInvalidate but not Pref_PrepareForStore.

 *

 * Hell (and the book on my shelf I can't open ...) know what the R8000 does.

 *

 * RM7000 version 1.0 interprets all hints as Pref_Load; version 2.0 implements

 * Pref_PrepareForStore also.

 *

 * RM9000 is MIPS IV but implements prefetching like MIPS32/MIPS64;

 * it's Pref_WriteBackInvalidate is a nop.

 *

 * VR7701 only implements the Load prefetch.

 *

 * Finally MIPS32 and MIPS64 implement all of the following hints.

 */

#define Pref_Load                       0

#define Pref_Store                      1

                                                /* 2 and 3 are reserved */

#define Pref_LoadStreamed               4

#define Pref_StoreStreamed              5

#define Pref_LoadRetained               6

#define Pref_StoreRetained              7

                                                /* 8 ... 24 are reserved */

#define Pref_WriteBackInvalidate        25

#define Pref_PrepareForStore            30

#endif /* __ASM_PREFETCH_H */