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- #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. */
- #if defined(CONFIG_MMU) && defined(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) (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
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