diff options
Diffstat (limited to 'arch/avr32/include/asm')
| -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 0000000..3b2b032 --- /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__ */ |