diff options
Diffstat (limited to 'arch/arc/plat-arcfpga/include/plat/dma_addr.h')
| -rw-r--r-- | arch/arc/plat-arcfpga/include/plat/dma_addr.h | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/arch/arc/plat-arcfpga/include/plat/dma_addr.h b/arch/arc/plat-arcfpga/include/plat/dma_addr.h deleted file mode 100644 index 0e963431b72..00000000000 --- a/arch/arc/plat-arcfpga/include/plat/dma_addr.h +++ /dev/null @@ -1,45 +0,0 @@ -/* - * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * vineetg: Feb 2009 - * -For AA4 board, kernel to DMA address APIs - */ - -/* - * kernel addresses are 0x800_000 based, while Bus addr are 0 based - */ - -#ifndef __PLAT_DMA_ADDR_H -#define __PLAT_DMA_ADDR_H - -#include <linux/device.h> - -static inline unsigned long plat_dma_addr_to_kernel(struct device *dev, - dma_addr_t dma_addr) -{ - return dma_addr + PAGE_OFFSET; -} - -static inline dma_addr_t plat_kernel_addr_to_dma(struct device *dev, void *ptr) -{ - unsigned long addr = (unsigned long)ptr; - /* - * To Catch buggy drivers which can call DMA map API with kernel vaddr - * i.e. for buffers alloc via vmalloc or ioremap which are not - * gaurnateed to be PHY contiguous and hence unfit for DMA anyways. - * On ARC kernel virtual address is 0x7000_0000 to 0x7FFF_FFFF, so - * ideally we want to check this range here, but our implementation is - * better as it checks for even worse user virtual address as well. - */ - if (likely(addr >= PAGE_OFFSET)) - return addr - PAGE_OFFSET; - - BUG(); - return addr; -} - -#endif |