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a6eb9fe105
Now each architecture has the own dma_get_cache_alignment implementation. dma_get_cache_alignment returns the minimum DMA alignment. Architectures define it as ARCH_KMALLOC_MINALIGN (it's used to make sure that malloc'ed buffer is DMA-safe; the buffer doesn't share a cache with the others). So we can unify dma_get_cache_alignment implementations. This patch: dma_get_cache_alignment() needs to know if an architecture defines ARCH_KMALLOC_MINALIGN or not (needs to know if architecture has DMA alignment restriction). However, slab.h define ARCH_KMALLOC_MINALIGN if architectures doesn't define it. Let's rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN. ARCH_KMALLOC_MINALIGN is used only in the internals of slab/slob/slub (except for crypto). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
56 lines
2 KiB
C
56 lines
2 KiB
C
/* MN10300 cache management registers
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_CACHE_H
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#define _ASM_CACHE_H
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#include <asm/cpu-regs.h>
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#include <proc/cache.h>
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#ifndef __ASSEMBLY__
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#define L1_CACHE_DISPARITY (L1_CACHE_NENTRIES * L1_CACHE_BYTES)
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#else
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#define L1_CACHE_DISPARITY L1_CACHE_NENTRIES * L1_CACHE_BYTES
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#endif
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#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
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/* data cache purge registers
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* - read from the register to unconditionally purge that cache line
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* - write address & 0xffffff00 to conditionally purge that cache line
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* - clear LSB to request invalidation as well
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*/
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#define DCACHE_PURGE(WAY, ENTRY) \
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__SYSREG(0xc8400000 + (WAY) * L1_CACHE_WAYDISP + \
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(ENTRY) * L1_CACHE_BYTES, u32)
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#define DCACHE_PURGE_WAY0(ENTRY) \
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__SYSREG(0xc8400000 + 0 * L1_CACHE_WAYDISP + (ENTRY) * L1_CACHE_BYTES, u32)
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#define DCACHE_PURGE_WAY1(ENTRY) \
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__SYSREG(0xc8400000 + 1 * L1_CACHE_WAYDISP + (ENTRY) * L1_CACHE_BYTES, u32)
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#define DCACHE_PURGE_WAY2(ENTRY) \
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__SYSREG(0xc8400000 + 2 * L1_CACHE_WAYDISP + (ENTRY) * L1_CACHE_BYTES, u32)
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#define DCACHE_PURGE_WAY3(ENTRY) \
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__SYSREG(0xc8400000 + 3 * L1_CACHE_WAYDISP + (ENTRY) * L1_CACHE_BYTES, u32)
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/* instruction cache access registers */
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#define ICACHE_DATA(WAY, ENTRY, OFF) \
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__SYSREG(0xc8000000 + (WAY) * L1_CACHE_WAYDISP + (ENTRY) * 0x10 + (OFF) * 4, u32)
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#define ICACHE_TAG(WAY, ENTRY) \
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__SYSREG(0xc8100000 + (WAY) * L1_CACHE_WAYDISP + (ENTRY) * 0x10, u32)
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/* instruction cache access registers */
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#define DCACHE_DATA(WAY, ENTRY, OFF) \
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__SYSREG(0xc8200000 + (WAY) * L1_CACHE_WAYDISP + (ENTRY) * 0x10 + (OFF) * 4, u32)
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#define DCACHE_TAG(WAY, ENTRY) \
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__SYSREG(0xc8300000 + (WAY) * L1_CACHE_WAYDISP + (ENTRY) * 0x10, u32)
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#endif /* _ASM_CACHE_H */
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