memory.h
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上传日期:2009-04-28
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- /*
- * linux/include/asm-arm/arch-imx/memory.h
- *
- * Copyright (C) 1999 ARM Limited
- * Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *
- * 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 __ASM_ARCH_MMU_H
- #define __ASM_ARCH_MMU_H
- #define PHYS_OFFSET (0x08000000UL)
- /*
- * Virtual view <-> DMA view memory address translations
- * virt_to_bus: Used to translate the virtual address to an
- * address suitable to be passed to set_dma_addr
- * bus_to_virt: Used to convert an address for DMA operations
- * to an address that the kernel can use.
- */
- #define __virt_to_bus__is_a_macro
- #define __virt_to_bus(x) (x - PAGE_OFFSET + PHYS_OFFSET)
- #define __bus_to_virt__is_a_macro
- #define __bus_to_virt(x) (x - PHYS_OFFSET + PAGE_OFFSET)
- #endif