1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __VIRT_CONVERT__ 3#define __VIRT_CONVERT__ 4 5/* 6 * Macros used for converting between virtual and physical mappings. 7 */ 8 9#ifdef __KERNEL__ 10 11#include <linux/compiler.h> 12#include <linux/mmzone.h> 13#include <asm/setup.h> 14#include <asm/page.h> 15 16/* 17 * Change virtual addresses to physical addresses and vv. 18 */ 19#define virt_to_phys virt_to_phys 20static inline unsigned long virt_to_phys(void *address) 21{ 22 return __pa(address); 23} 24 25#define phys_to_virt phys_to_virt 26static inline void *phys_to_virt(unsigned long address) 27{ 28 return __va(address); 29} 30 31/* Permanent address of a page. */ 32#if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK) 33#define page_to_phys(page) \ 34 __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) 35#else 36#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 37#endif 38 39/* 40 * IO bus memory addresses are 1:1 with the physical address, 41 */ 42#define virt_to_bus virt_to_phys 43#define bus_to_virt phys_to_virt 44 45#endif 46#endif 47