| 1 | /* |
| 2 | * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved. |
| 3 | */ |
| 4 | #ifndef __CF_VIRTCONVERT__ |
| 5 | #define __CF_VIRTCONVERT__ |
| 6 | |
| 7 | /* |
| 8 | * Macros used for converting between virtual and physical mappings. |
| 9 | * |
| 10 | * Coldfire Specific |
| 11 | */ |
| 12 | |
| 13 | #ifdef __KERNEL__ |
| 14 | |
| 15 | #include <linux/compiler.h> |
| 16 | #include <linux/mmzone.h> |
| 17 | #include <asm/setup.h> |
| 18 | #include <asm/page.h> |
| 19 | |
| 20 | /* |
| 21 | * Change virtual addresses to physical addresses and vv. |
| 22 | */ |
| 23 | static inline unsigned long virt_to_phys(void *address) |
| 24 | { |
| 25 | return __pa(address); |
| 26 | } |
| 27 | |
| 28 | static inline void *phys_to_virt(unsigned long address) |
| 29 | { |
| 30 | return __va(address); |
| 31 | } |
| 32 | |
| 33 | /* Permanent address of a page. */ |
| 34 | #ifdef CONFIG_SINGLE_MEMORY_CHUNK |
| 35 | #define page_to_phys(page) \ |
| 36 | __pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT)) |
| 37 | #else |
| 38 | #define page_to_phys(_page) ({ \ |
| 39 | struct page *__page = _page; \ |
| 40 | struct pglist_data *pgdat; \ |
| 41 | pgdat = pg_data_table[page_to_nid(__page)]; \ |
| 42 | page_to_pfn(__page) << PAGE_SHIFT; \ |
| 43 | }) |
| 44 | #endif |
| 45 | |
| 46 | /* |
| 47 | * IO bus memory addresses are 1:1 with the physical address, |
| 48 | */ |
| 49 | #ifdef CONFIG_PCI |
| 50 | #define virt_to_bus(a) (a + PCI_DMA_BASE) |
| 51 | #define bus_to_virt(a) (a - PCI_DMA_BASE) |
| 52 | #else |
| 53 | #define virt_to_bus(a) (a) |
| 54 | #define bus_to_virt(a) (a) |
| 55 | #endif |
| 56 | |
| 57 | #endif /* __KERNEL__ */ |
| 58 | #endif /* __CF_VIRTCONVERT__ */ |
| 59 | |
