| #ifndef __VIRT_CONVERT__ |
| #define __VIRT_CONVERT__ |
| |
| /* |
| * Macros used for converting between virtual and physical mappings. |
| */ |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/compiler.h> |
| #include <linux/mmzone.h> |
| #include <asm/setup.h> |
| #include <asm/page.h> |
| |
| /* |
| * Change virtual addresses to physical addresses and vv. |
| */ |
| static inline unsigned long virt_to_phys(void *address) |
| { |
| return __pa(address); |
| } |
| |
| static inline void *phys_to_virt(unsigned long address) |
| { |
| return __va(address); |
| } |
| |
| /* Permanent address of a page. */ |
| #ifdef CONFIG_SINGLE_MEMORY_CHUNK |
| #define page_to_phys(page) \ |
| __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) |
| #else |
| #define page_to_phys(_page) ({ \ |
| struct page *__page = _page; \ |
| struct pglist_data *pgdat; \ |
| pgdat = pg_data_table[page_to_nid(__page)]; \ |
| page_to_pfn(__page) << PAGE_SHIFT; \ |
| }) |
| #endif |
| |
| /* |
| * IO bus memory addresses are 1:1 with the physical address, |
| */ |
| #define virt_to_bus virt_to_phys |
| #define bus_to_virt phys_to_virt |
| |
| #endif |
| #endif |
