Staging
v0.5.2
swh:1:snp:a902887e4be9191b7c6c4406aa06b31c1ce2c7cc
Raw File
Tip revision: 519d81956ee277b4419c723adfb154603c2565ba authored by Linus Torvalds on 18 October 2021, 06:00:13 UTC
Linux 5.15-rc6
Tip revision: 519d819
virtconvert.h
/* 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
back to top