diff options
| author | Anton Staaf <robotboy@chromium.org> | 2011-10-17 16:46:09 -0700 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-10-23 20:50:42 +0200 |
| commit | 75ff24be4799d99bb29a154f0205dbc0a12affde (patch) | |
| tree | 101cba9ab44115f4a44be4d413db54a27c73fd2f /arch/avr32/include | |
| parent | 3c3f8a7f3e58a9dbf6c2f3e462ad503eae35852a (diff) | |
avr32: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Reinhard Meyer <u-boot@emk-elektronik.de>
Diffstat (limited to 'arch/avr32/include')
| -rw-r--r-- | arch/avr32/include/asm/cache.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/cache.h b/arch/avr32/include/asm/cache.h new file mode 100644 index 0000000000..3b2b032ef7 --- /dev/null +++ b/arch/avr32/include/asm/cache.h @@ -0,0 +1,40 @@ +/* + * 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 __AVR32_CACHE_H__ +#define __AVR32_CACHE_H__ + +/* + * Since the AVR32 architecture has a queryable cacheline size with a maximum + * value of 256 we set the DMA buffer alignemnt requirement to this maximum + * value. The board config can override this if it knows that the cacheline + * size is a smaller value. AVR32 boards use the CONFIG_SYS_DCACHE_LINESZ + * macro to specify cache line size, so if it is set we use it instead. + */ +#ifdef CONFIG_SYS_CACHELINE_SIZE +#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE +#elif defined(CONFIG_SYS_DCACHE_LINESZ) +#define ARCH_DMA_MINALIGN CONFIG_SYS_DCACHE_LINESZ +#else +#define ARCH_DMA_MINALIGN 256 +#endif + +#endif /* __AVR32_CACHE_H__ */ |