Cregit: Linux 5.13: virtconvert.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Linus Torvalds (pre-git)	61	68.54%	2	20.00%
Geert Uytterhoeven	13	14.61%	4	40.00%
Greg Ungerer	8	8.99%	1	10.00%
Roman Zippel	5	5.62%	1	10.00%
Adrian Bunk	1	1.12%	1	10.00%
Greg Kroah-Hartman	1	1.12%	1	10.00%
Total	89		10

/* SPDX-License-Identifier: GPL-2.0 */
#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.
 */
#define virt_to_phys virt_to_phys
static inline unsigned long virt_to_phys(void *address)
{
	return __pa(address);
}

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

/* Permanent address of a page. */
#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)

/*
 * 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