From: Anton Staaf Date: Mon, 17 Oct 2011 23:46:12 +0000 (-0700) Subject: x86: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment X-Git-Tag: v2011.12-rc1~465 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=3620f860eff02722aa559e568f4ca87f4c304901;p=oweals%2Fu-boot.git x86: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment Signed-off-by: Anton Staaf Cc: Mike Frysinger Cc: Lukasz Majewski Cc: Graeme Russ --- diff --git a/arch/x86/include/asm/cache.h b/arch/x86/include/asm/cache.h new file mode 100644 index 0000000000..87c9e0be42 --- /dev/null +++ b/arch/x86/include/asm/cache.h @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __X86_CACHE_H__ +#define __X86_CACHE_H__ + +/* + * If CONFIG_SYS_CACHELINE_SIZE is defined use it for DMA alignment. Otherwise + * use 64-bytes, a safe default for x86. + */ +#ifdef CONFIG_SYS_CACHELINE_SIZE +#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE +#else +#define ARCH_DMA_MINALIGN 64 +#endif + +#endif /* __X86_CACHE_H__ */