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
20 static inline unsigned long virt_to_phys(void *address)
21 {
22 return __pa(address);
23 }
24
25 #define phys_to_virt phys_to_virt
26 static inline void *phys_to_virt(unsigned long address)
27 {
28 return __va(address);
29 }
30
31 /* Permanent address of a page. */
32 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
33
34 /*
35 * IO bus memory addresses are 1:1 with the physical address,
36 * deprecated globally but still used on two machines.
37 */
38 #if defined(CONFIG_AMIGA) || defined(CONFIG_VME)
39 #define virt_to_bus virt_to_phys
40 #endif
41
42 #endif
43 #endif
44
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