arch/m68k/include/asm/virtconvert.h

   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 static inline unsigned long virt_to_phys(void *address)
  20 {
  21         return __pa(address);
  22 }
  23
  24 static inline void *phys_to_virt(unsigned long address)
  25 {
  26         return __va(address);
  27 }
  28
  29 /* Permanent address of a page. */
  30 #if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK)
  31 #define page_to_phys(page) \
  32         __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
  33 #else
  34 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
  35 #endif
  36
  37 /*
  38  * IO bus memory addresses are 1:1 with the physical address,
  39  */
  40 #define virt_to_bus virt_to_phys
  41 #define bus_to_virt phys_to_virt
  42
  43 #endif
  44 #endif