| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | #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 |