memory.h

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/*
 *  linux/include/asm-arm/arch-arc/memory.h
 *
 *  Copyright (C) 1996-1999 Russell King.
 *
 * 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.
 *
 * Changelog:
 *  22-Nov-1996	RMK	Created
 *  21-Mar-1999	RMK	Renamed to memory.h
 *		RMK	Moved PAGE_OFFSET and TASK_SIZE here
 */
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H

/*
 * User space: 26MB
 */
#define TASK_SIZE	(0x01a00000UL)
#define TASK_SIZE_26	(0x01a00000UL)

/*
 * This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)

/*
 * Page offset: 32MB
 */
#define PAGE_OFFSET	(0x02000000UL)
#define PHYS_OFFSET	(0x02000000UL)

#define __virt_to_phys__is_a_macro
#define __virt_to_phys(vpage) vpage
#define __phys_to_virt__is_a_macro
#define __phys_to_virt(ppage) ppage

/*
 * 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)
#define __bus_to_virt__is_a_macro
#define __bus_to_virt(x)	(x)

#define PHYS_TO_NID(addr)	(0)

#endif