1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __VIRT_CONVERT__ 3*4882a593Smuzhiyun #define __VIRT_CONVERT__ 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * Macros used for converting between virtual and physical mappings. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifdef __KERNEL__ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <linux/compiler.h> 12*4882a593Smuzhiyun #include <linux/mmzone.h> 13*4882a593Smuzhiyun #include <asm/setup.h> 14*4882a593Smuzhiyun #include <asm/page.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * Change virtual addresses to physical addresses and vv. 18*4882a593Smuzhiyun */ 19*4882a593Smuzhiyun #define virt_to_phys virt_to_phys virt_to_phys(void * address)20*4882a593Smuzhiyunstatic inline unsigned long virt_to_phys(void *address) 21*4882a593Smuzhiyun { 22*4882a593Smuzhiyun return __pa(address); 23*4882a593Smuzhiyun } 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #define phys_to_virt phys_to_virt phys_to_virt(unsigned long address)26*4882a593Smuzhiyunstatic inline void *phys_to_virt(unsigned long address) 27*4882a593Smuzhiyun { 28*4882a593Smuzhiyun return __va(address); 29*4882a593Smuzhiyun } 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /* Permanent address of a page. */ 32*4882a593Smuzhiyun #if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK) 33*4882a593Smuzhiyun #define page_to_phys(page) \ 34*4882a593Smuzhiyun __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) 35*4882a593Smuzhiyun #else 36*4882a593Smuzhiyun #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 37*4882a593Smuzhiyun #endif 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* 40*4882a593Smuzhiyun * IO bus memory addresses are 1:1 with the physical address, 41*4882a593Smuzhiyun */ 42*4882a593Smuzhiyun #define virt_to_bus virt_to_phys 43*4882a593Smuzhiyun #define bus_to_virt phys_to_virt 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #endif 46*4882a593Smuzhiyun #endif 47