memory.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * linux/include/asm-arm/arch-pxa/memory.h
- *
- * Author: Nicolas Pitre
- * Copyright: (C) 2001 MontaVista Software Inc.
- *
- * 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_MEMORY_H
- #define __ASM_ARCH_MEMORY_H
- /*
- * Task size: 3GB
- */
- #define TASK_SIZE (0xc0000000UL)
- #define TASK_SIZE_26 (0x04000000UL)
- /*
- * 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: 3GB
- */
- #define PAGE_OFFSET (0xc0000000UL)
- /*
- * Physical DRAM offset.
- */
- #define PHYS_OFFSET (0xa0000000UL)
- #define PHYS_TO_NID(addr) (0)
- /*
- * physical vs virtual ram conversion
- */
- #define __virt_to_phys__is_a_macro
- #define __phys_to_virt__is_a_macro
- #define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
- #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
- /*
- * 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 __bus_to_virt__is_a_macro
- #define __virt_to_bus(x) __virt_to_phys(x)
- #define __bus_to_virt(x) __phys_to_virt(x)
- #endif