4 #include <linux/config.h>
7 * c 2001 PPC 64 Team, IBM Corp
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
15 #include <asm/types.h>
20 typedef u32 msChunks_entry;
22 unsigned long num_chunks;
23 unsigned long chunk_size;
24 unsigned long chunk_shift;
25 unsigned long chunk_mask;
29 extern struct msChunks msChunks;
31 extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long);
32 extern unsigned long reloc_offset(void);
34 #ifdef CONFIG_MSCHUNKS
36 static inline unsigned long
37 chunk_to_addr(unsigned long chunk)
39 unsigned long offset = reloc_offset();
40 struct msChunks *_msChunks = PTRRELOC(&msChunks);
42 return chunk << _msChunks->chunk_shift;
45 static inline unsigned long
46 addr_to_chunk(unsigned long addr)
48 unsigned long offset = reloc_offset();
49 struct msChunks *_msChunks = PTRRELOC(&msChunks);
51 return addr >> _msChunks->chunk_shift;
54 static inline unsigned long
55 chunk_offset(unsigned long addr)
57 unsigned long offset = reloc_offset();
58 struct msChunks *_msChunks = PTRRELOC(&msChunks);
60 return addr & _msChunks->chunk_mask;
63 static inline unsigned long
64 abs_chunk(unsigned long pchunk)
66 unsigned long offset = reloc_offset();
67 struct msChunks *_msChunks = PTRRELOC(&msChunks);
68 if ( pchunk >= _msChunks->num_chunks ) {
71 return PTRRELOC(_msChunks->abs)[pchunk];
75 static inline unsigned long
76 phys_to_absolute(unsigned long pa)
78 return chunk_to_addr(abs_chunk(addr_to_chunk(pa))) + chunk_offset(pa);
81 static inline unsigned long
82 physRpn_to_absRpn(unsigned long rpn)
84 unsigned long pa = rpn << PAGE_SHIFT;
85 unsigned long aa = phys_to_absolute(pa);
86 return (aa >> PAGE_SHIFT);
89 static inline unsigned long
90 absolute_to_phys(unsigned long aa)
92 return lmb_abs_to_phys(aa);
95 #else /* !CONFIG_MSCHUNKS */
97 #define chunk_to_addr(chunk) ((unsigned long)(chunk))
98 #define addr_to_chunk(addr) (addr)
99 #define chunk_offset(addr) (0)
100 #define abs_chunk(pchunk) (pchunk)
102 #define phys_to_absolute(pa) (pa)
103 #define physRpn_to_absRpn(rpn) (rpn)
104 #define absolute_to_phys(aa) (aa)
106 #endif /* !CONFIG_MSCHUNKS */
109 static inline unsigned long
110 virt_to_absolute(unsigned long ea)
112 return phys_to_absolute(__pa(ea));
115 static inline unsigned long
116 absolute_to_virt(unsigned long aa)
118 return (unsigned long)__va(absolute_to_phys(aa));
121 #endif /* _ABS_ADDR_H */