From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ww0-f49.google.com ([74.125.82.49]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PvHUV-0003S6-H1 for barebox@lists.infradead.org; Thu, 03 Mar 2011 22:59:36 +0000 Received: by mail-ww0-f49.google.com with SMTP id 40so1440274wwj.18 for ; Thu, 03 Mar 2011 14:59:27 -0800 (PST) From: franck.jullien@gmail.com Date: Thu, 3 Mar 2011 23:58:44 +0100 Message-Id: <4d701d43.9009d80a.2cd3.5e91@mx.google.com> In-Reply-To: References: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 30/54] Add arch/nios2/include/asm/dma-mapping.h To: barebox@lists.infradead.org From: Franck JULLIEN Add arch/nios2/include/asm/dma-mapping.h --- arch/nios2/include/asm/dma-mapping.h | 25 +++++++++++++++++++++++++ 1 files changed, 25 insertions(+), 0 deletions(-) create mode 100644 arch/nios2/include/asm/dma-mapping.h diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h new file mode 100644 index 0000000..f9159c5 --- /dev/null +++ b/arch/nios2/include/asm/dma-mapping.h @@ -0,0 +1,25 @@ +#ifndef __ASM_NIOS2_DMA_MAPPING_H +#define __ASM_NIOS2_DMA_MAPPING_H + +#include + +/* dma_alloc_coherent() return cache-line aligned allocation which is mapped + * to uncached io region. + * + * IO_REGION_BASE should be defined in board config header file + * 0x80000000 for nommu, 0xe0000000 for mmu + */ + +static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) +{ + void *addr = malloc(len + DCACHE_LINE_SIZE); + if (!addr) + return 0; + flush_dcache((unsigned long)addr, len + DCACHE_LINE_SIZE); + *handle = ((unsigned long)addr + + (DCACHE_LINE_SIZE - 1)) & + ~(DCACHE_LINE_SIZE - 1) & ~(IO_REGION_BASE); + return (void *)(*handle | IO_REGION_BASE); +} + +#endif /* __ASM_NIOS2_DMA_MAPPING_H */ -- 1.7.3.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox