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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | ||
1da177e4 | 11 | #include <linux/compiler.h> |
12d810c1 | 12 | #include <linux/mmzone.h> |
1da177e4 LT |
13 | #include <asm/setup.h> |
14 | #include <asm/page.h> | |
15 | ||
1da177e4 LT |
16 | /* |
17 | * Change virtual addresses to physical addresses and vv. | |
18 | */ | |
1da177e4 LT |
19 | static inline unsigned long virt_to_phys(void *address) |
20 | { | |
12d810c1 | 21 | return __pa(address); |
1da177e4 LT |
22 | } |
23 | ||
24 | static inline void *phys_to_virt(unsigned long address) | |
25 | { | |
12d810c1 | 26 | return __va(address); |
1da177e4 | 27 | } |
1da177e4 LT |
28 | |
29 | /* Permanent address of a page. */ | |
817f72d6 | 30 | #if defined(CONFIG_MMU) && defined(CONFIG_SINGLE_MEMORY_CHUNK) |
12d810c1 RZ |
31 | #define page_to_phys(page) \ |
32 | __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) | |
33 | #else | |
f54bcdc2 | 34 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
12d810c1 | 35 | #endif |
1da177e4 LT |
36 | |
37 | /* | |
38 | * IO bus memory addresses are 1:1 with the physical address, | |
1da177e4 | 39 | */ |
1da177e4 LT |
40 | #define virt_to_bus virt_to_phys |
41 | #define bus_to_virt phys_to_virt | |
1da177e4 LT |
42 | |
43 | #endif | |
44 | #endif |