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 #ifdef CONFIG_MSCHUNKS
23 unsigned long num_chunks;
24 unsigned long chunk_size;
25 unsigned long chunk_shift;
26 unsigned long chunk_mask;
30 extern struct mschunks_map mschunks_map;
32 /* Chunks are 256 KB */
33 #define MSCHUNKS_CHUNK_SHIFT (18)
34 #define MSCHUNKS_CHUNK_SIZE (1UL << MSCHUNKS_CHUNK_SHIFT)
35 #define MSCHUNKS_OFFSET_MASK (MSCHUNKS_CHUNK_SIZE - 1)
37 static inline unsigned long chunk_to_addr(unsigned long chunk)
39 return chunk << MSCHUNKS_CHUNK_SHIFT;
42 static inline unsigned long addr_to_chunk(unsigned long addr)
44 return addr >> MSCHUNKS_CHUNK_SHIFT;
47 static inline unsigned long chunk_offset(unsigned long addr)
49 return addr & MSCHUNKS_OFFSET_MASK;
52 static inline unsigned long abs_chunk(unsigned long pchunk)
54 if (pchunk >= mschunks_map.num_chunks)
57 return mschunks_map.mapping[pchunk];
60 /* A macro so it can take pointers or unsigned long. */
61 #define phys_to_abs(pa) \
62 ({ unsigned long _pa = (unsigned long)(pa); \
63 chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \
66 static inline unsigned long
67 physRpn_to_absRpn(unsigned long rpn)
69 unsigned long pa = rpn << PAGE_SHIFT;
70 unsigned long aa = phys_to_abs(pa);
71 return (aa >> PAGE_SHIFT);
74 /* A macro so it can take pointers or unsigned long. */
75 #define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa))
77 #else /* !CONFIG_MSCHUNKS */
79 #define chunk_to_addr(chunk) ((unsigned long)(chunk))
80 #define addr_to_chunk(addr) (addr)
81 #define chunk_offset(addr) (0)
82 #define abs_chunk(pchunk) (pchunk)
84 #define phys_to_abs(pa) (pa)
85 #define physRpn_to_absRpn(rpn) (rpn)
86 #define abs_to_phys(aa) (aa)
88 #endif /* !CONFIG_MSCHUNKS */
90 /* Convenience macros */
91 #define virt_to_abs(va) phys_to_abs(__pa(va))
92 #define abs_to_virt(aa) __va(abs_to_phys(aa))
94 #endif /* _ABS_ADDR_H */