memory.h

来自「linux 内核源代码」· C头文件 代码 · 共 37 行

/*
 *  linux/include/asm-arm/arch-netx/memory.h
 *
 * Copyright (C) 2005 Sascha Hauer <[e-mail]>, Pengutronix
 *
 * 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.
 *
 * 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_MEMORY_H
#define __ASM_ARCH_MEMORY_H

#define PHYS_OFFSET UL(0x80000000)

/*
 * 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(x)         __virt_to_phys(x)
#define __bus_to_virt(x)         __phys_to_virt(x)

#endif