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| author | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-01-15 18:16:59 +0800 |
|---|---|---|
| committer | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-03-17 09:19:08 +0800 |
| commit | b50f1704e9c441c58cf6dc05e72953ca30e1d4d2 (patch) | |
| tree | bfd7f81c849aa42f6355d9fb383f2167c5f0e087 /arch/unicore32/include/asm/cache.h | |
| parent | f73670e8a55c11d47c28dca35dc4bc7dfbd4e6eb (diff) | |
| download | linux-b50f1704e9c441c58cf6dc05e72953ca30e1d4d2.tar.bz2 | |
unicore32 core architecture: mm related: generic codes
This patch includes generic codes for memory management.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/unicore32/include/asm/cache.h')
| -rw-r--r-- | arch/unicore32/include/asm/cache.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/cache.h b/arch/unicore32/include/asm/cache.h new file mode 100644 index 000000000000..ad8f795d86ca --- /dev/null +++ b/arch/unicore32/include/asm/cache.h @@ -0,0 +1,27 @@ +/* + * linux/arch/unicore32/include/asm/cache.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __UNICORE_CACHE_H__ +#define __UNICORE_CACHE_H__ + +#define L1_CACHE_SHIFT (5) +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +/* + * Memory returned by kmalloc() may be used for DMA, so we must make + * sure that all such allocations are cache aligned. Otherwise, + * unrelated code may cause parts of the buffer to be read into the + * cache before the transfer is done, causing old data to be seen by + * the CPU. + */ +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES + +#endif |