/* *  linux/include/asm-arm26/memory.h * *  Copyright (C) 2000-2002 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. * *  Note: this file should not be included by non-asm/.h files */#ifndef __ASM_ARM_MEMORY_H#define __ASM_ARM_MEMORY_H /* * User space: 26MB */#define TASK_SIZE       (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 PHYS_TO_NID(addr)       (0) /* * PFNs are used to describe any physical page; this means * PFN 0 == physical address 0. * * This is the PFN of the first RAM page in the kernel * direct-mapped view.  We assume this is the first page * of RAM in the mem_map as well. */#define PHYS_PFN_OFFSET	(PHYS_OFFSET >> PAGE_SHIFT) /* * These are *only* valid on the kernel direct mapped RAM memory. */static inline unsigned long virt_to_phys(void *x){	return (unsigned long)x;} static inline void *phys_to_virt(unsigned long x){	return (void *)((unsigned long)x);} #define __pa(x)			(unsigned long)(x)#define __va(x)			((void *)(unsigned long)(x)) /* * Virtual <-> DMA view memory address translations * Again, these are *only* valid on the kernel direct mapped RAM * memory.  Use of these is *depreciated*. */#define virt_to_bus(x)		((unsigned long)(x))#define bus_to_virt(x)		((void *)((unsigned long)(x))) /* * Conversion between a struct page and a physical address. * * Note: when converting an unknown physical address to a * struct page, the resulting pointer must be validated * using VALID_PAGE().  It must return an invalid struct page * for any physical address not corresponding to a system * RAM address. * *  page_to_pfn(page)	convert a struct page * to a PFN number *  pfn_to_page(pfn)	convert a _valid_ PFN number to struct page * *  pfn_valid(pfn)	indicates whether a PFN number is valid * *  virt_to_page(k)	convert a _valid_ virtual address to struct page * *  virt_addr_valid(k)	indicates whether a virtual address is valid */#define ARCH_PFN_OFFSET		(PHYS_PFN_OFFSET)#define pfn_valid(pfn)		((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) #define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))#define virt_addr_valid(kaddr)	((int)(kaddr) >= PAGE_OFFSET && (int)(kaddr) < (unsigned long)high_memory) /* * For BIO.  "will die".  Kill me when bio_to_phys() and bvec_to_phys() die. */#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT) /* * We should really eliminate virt_to_bus() here - it's depreciated. */#define page_to_bus(page)	(page_address(page)) #include <asm-generic/memory_model.h>#endif