memory.h

来自「linux 内核源代码」· C头文件 代码 · 共 37 行

/*
 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * 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.
 */

#ifndef __ASM_ARCH_MXC_MEMORY_H__
#define __ASM_ARCH_MXC_MEMORY_H__

#include <asm/hardware.h>

/*!
 * @file memory.h
 * @brief This file contains macros needed by the Linux kernel and drivers.
 *
 * @ingroup Memory
 */

/*!
 * Virtual view <-> DMA view memory address translations
 * This macro is used to translate the virtual address to an address
 * suitable to be passed to set_dma_addr()
 */
#define __virt_to_bus(a)	__virt_to_phys(a)

/*!
 * Used to convert an address for DMA operations to an address that the
 * kernel can use.
 */
#define __bus_to_virt(a)	__phys_to_virt(a)

#endif				/* __ASM_ARCH_MXC_MEMORY_H__ */