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1da177e4 LT |
1 | #ifndef __VIRT_CONVERT__ |
2 | #define __VIRT_CONVERT__ | |
3 | ||
4 | /* | |
5 | * Macros used for converting between virtual and physical mappings. | |
6 | */ | |
7 | ||
8 | #ifdef __KERNEL__ | |
9 | ||
1da177e4 LT |
10 | #include <linux/compiler.h> |
11 | #include <asm/setup.h> | |
12 | #include <asm/page.h> | |
13 | ||
14 | #ifdef CONFIG_AMIGA | |
15 | #include <asm/amigahw.h> | |
16 | #endif | |
17 | ||
18 | /* | |
19 | * Change virtual addresses to physical addresses and vv. | |
20 | */ | |
21 | #ifndef CONFIG_SUN3 | |
22 | extern unsigned long mm_vtop(unsigned long addr) __attribute_const__; | |
23 | extern unsigned long mm_ptov(unsigned long addr) __attribute_const__; | |
24 | #else | |
25 | static inline unsigned long mm_vtop(unsigned long vaddr) | |
26 | { | |
27 | return __pa(vaddr); | |
28 | } | |
29 | ||
30 | static inline unsigned long mm_ptov(unsigned long paddr) | |
31 | { | |
32 | return (unsigned long)__va(paddr); | |
33 | } | |
34 | #endif | |
35 | ||
36 | #ifdef CONFIG_SINGLE_MEMORY_CHUNK | |
37 | static inline unsigned long virt_to_phys(void *vaddr) | |
38 | { | |
39 | return (unsigned long)vaddr - PAGE_OFFSET + m68k_memory[0].addr; | |
40 | } | |
41 | ||
42 | static inline void * phys_to_virt(unsigned long paddr) | |
43 | { | |
44 | return (void *)(paddr - m68k_memory[0].addr + PAGE_OFFSET); | |
45 | } | |
46 | #else | |
47 | static inline unsigned long virt_to_phys(void *address) | |
48 | { | |
49 | return mm_vtop((unsigned long)address); | |
50 | } | |
51 | ||
52 | static inline void *phys_to_virt(unsigned long address) | |
53 | { | |
54 | return (void *) mm_ptov(address); | |
55 | } | |
56 | #endif | |
57 | ||
58 | /* Permanent address of a page. */ | |
59 | #define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) | |
60 | #define page_to_phys(page) virt_to_phys((void *)__page_address(page)) | |
61 | ||
62 | /* | |
63 | * IO bus memory addresses are 1:1 with the physical address, | |
64 | * except on the PCI bus of the Hades. | |
65 | */ | |
66 | #ifdef CONFIG_HADES | |
67 | #define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0)) | |
68 | #define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0))) | |
69 | #else | |
70 | #define virt_to_bus virt_to_phys | |
71 | #define bus_to_virt phys_to_virt | |
72 | #endif | |
73 | ||
74 | #endif | |
75 | #endif |