From: Anton Staaf Date: Mon, 17 Oct 2011 23:46:11 +0000 (-0700) Subject: mips: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=72d4dd4159c4f3978c20c04f78fe6aa02450da1a;p=project%2Fbcm63xx%2Fu-boot.git mips: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment Signed-off-by: Anton Staaf Cc: Mike Frysinger Cc: Lukasz Majewski Cc: Shinya Kuribayashi --- diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h new file mode 100644 index 0000000000..5406d5d46a --- /dev/null +++ b/arch/mips/include/asm/cache.h @@ -0,0 +1,36 @@ +/* + * 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 __MIPS_CACHE_H__ +#define __MIPS_CACHE_H__ + +/* + * The maximum L1 data cache line size on MIPS seems to be 128 bytes. We use + * that as a default for aligning DMA buffers unless the board config has + * specified another cache line size. + */ +#ifdef CONFIG_SYS_CACHELINE_SIZE +#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE +#else +#define ARCH_DMA_MINALIGN 128 +#endif + +#endif /* __MIPS_CACHE_H__ */