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author | David S. Miller <davem@davemloft.net> | 2008-10-11 12:39:35 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-10-11 12:39:35 -0700 |
commit | 56c5d900dbb8e042bfad035d18433476931d8f93 (patch) | |
tree | 00b793965beeef10db03e0ff021d2d965c410759 /arch/mips/include/asm/prefetch.h | |
parent | 4dd95b63ae25c5cad6986829b5e8788e9faa0330 (diff) | |
parent | ead9d23d803ea3a73766c3cb27bf7563ac8d7266 (diff) | |
download | op-kernel-dev-56c5d900dbb8e042bfad035d18433476931d8f93.zip op-kernel-dev-56c5d900dbb8e042bfad035d18433476931d8f93.tar.gz |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
sound/core/memalloc.c
Diffstat (limited to 'arch/mips/include/asm/prefetch.h')
-rw-r--r-- | arch/mips/include/asm/prefetch.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/mips/include/asm/prefetch.h b/arch/mips/include/asm/prefetch.h new file mode 100644 index 0000000..1785083 --- /dev/null +++ b/arch/mips/include/asm/prefetch.h @@ -0,0 +1,87 @@ +/* + * 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 and Pref_PrepareForStore is broken in + * current versions due to erratum G105. + * + * 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 + +#ifdef __ASSEMBLY__ + + .macro __pref hint addr +#ifdef CONFIG_CPU_HAS_PREFETCH + pref \hint, \addr +#endif + .endm + + .macro pref_load addr + __pref Pref_Load, \addr + .endm + + .macro pref_store addr + __pref Pref_Store, \addr + .endm + + .macro pref_load_streamed addr + __pref Pref_LoadStreamed, \addr + .endm + + .macro pref_store_streamed addr + __pref Pref_StoreStreamed, \addr + .endm + + .macro pref_load_retained addr + __pref Pref_LoadRetained, \addr + .endm + + .macro pref_store_retained addr + __pref Pref_StoreRetained, \addr + .endm + + .macro pref_wback_inv addr + __pref Pref_WriteBackInvalidate, \addr + .endm + + .macro pref_prepare_for_store addr + __pref Pref_PrepareForStore, \addr + .endm + +#endif + +#endif /* __ASM_PREFETCH_H */ |