1#ifndef __VIRT_CONVERT__
2#define __VIRT_CONVERT__
3
4/*
5 * Macros used for converting between virtual and physical mappings.
6 */
7
8#ifdef __KERNEL__
9
10#include <linux/compiler.h>
11#include <linux/mmzone.h>
12#include <asm/setup.h>
13#include <asm/page.h>
14
15/*
16 * Change virtual addresses to physical addresses and vv.
17 */
18static inline unsigned long virt_to_phys(void *address)
19{
20	return __pa(address);
21}
22
23static inline void *phys_to_virt(unsigned long address)
24{
25	return __va(address);
26}
27
28/* Permanent address of a page. */
29#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
30#define page_to_phys(page) \
31	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
32#else
33#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
34#endif
35
36/*
37 * IO bus memory addresses are 1:1 with the physical address,
38 */
39#define virt_to_bus virt_to_phys
40#define bus_to_virt phys_to_virt
41
42#endif
43#endif
44