[mirror_ubuntu-artful-kernel.git] / arch / m68k / include / asm / virtconvert.h

#ifndef __VIRT_CONVERT__
#define __VIRT_CONVERT__

/*
 * Macros used for converting between virtual and physical mappings.
 */

#ifdef __KERNEL__

#include <linux/compiler.h>
#include <linux/mmzone.h>
#include <asm/setup.h>
#include <asm/page.h>

/*
 * Change virtual addresses to physical addresses and vv.
 */
static inline unsigned long virt_to_phys(void *address)
{
	return __pa(address);
}

static inline void *phys_to_virt(unsigned long address)
{
	return __va(address);
}

/* Permanent address of a page. */
#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
#define page_to_phys(page) \
	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
#else
#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
#endif

/*
 * IO bus memory addresses are 1:1 with the physical address,
 */
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt

#endif
#endif
Commit	Line	Data
1da177e4 LT	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
1da177e4	10	#include <linux/compiler.h>
12d810c1	11	#include <linux/mmzone.h>
1da177e4 LT	12	#include <asm/setup.h>
	13	#include <asm/page.h>
	14
1da177e4 LT	15	/*
	16	* Change virtual addresses to physical addresses and vv.
	17	*/
1da177e4 LT	18	static inline unsigned long virt_to_phys(void *address)
1da177e4 LT	19	{
12d810c1	20	return __pa(address);
1da177e4 LT	21	}
	22
	23	static inline void *phys_to_virt(unsigned long address)
	24	{
12d810c1	25	return __va(address);
1da177e4	26	}
1da177e4 LT	27
1da177e4 LT	28	/* Permanent address of a page. */
817f72d6	29	#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
12d810c1 RZ	30	#define page_to_phys(page) \
	31	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
	32	#else
f54bcdc2	33	#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
12d810c1	34	#endif
1da177e4 LT	35
	36	/*
	37	* IO bus memory addresses are 1:1 with the physical address,
1da177e4	38	*/
1da177e4 LT	39	#define virt_to_bus virt_to_phys
1da177e4 LT	40	#define bus_to_virt phys_to_virt
1da177e4 LT	41
	42	#endif
	43	#endif