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);
33 #ifdef CONFIG_MSCHUNKS
35 static inline unsigned long chunk_to_addr(unsigned long chunk)
37 return chunk << msChunks.chunk_shift;
40 static inline unsigned long addr_to_chunk(unsigned long addr)
42 return addr >> msChunks.chunk_shift;
45 static inline unsigned long chunk_offset(unsigned long addr)
47 return addr & msChunks.chunk_mask;
50 static inline unsigned long abs_chunk(unsigned long pchunk)
52 if (pchunk >= msChunks.num_chunks)
55 return msChunks.abs[pchunk];
58 /* A macro so it can take pointers or unsigned long. */
59 #define phys_to_abs(pa) \
60 ({ unsigned long _pa = (unsigned long)(pa); \
61 chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \
64 static inline unsigned long
65 physRpn_to_absRpn(unsigned long rpn)
67 unsigned long pa = rpn << PAGE_SHIFT;
68 unsigned long aa = phys_to_abs(pa);
69 return (aa >> PAGE_SHIFT);
72 /* A macro so it can take pointers or unsigned long. */
73 #define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa))
75 #else /* !CONFIG_MSCHUNKS */
77 #define chunk_to_addr(chunk) ((unsigned long)(chunk))
78 #define addr_to_chunk(addr) (addr)
79 #define chunk_offset(addr) (0)
80 #define abs_chunk(pchunk) (pchunk)
82 #define phys_to_abs(pa) (pa)
83 #define physRpn_to_absRpn(rpn) (rpn)
84 #define abs_to_phys(aa) (aa)
86 #endif /* !CONFIG_MSCHUNKS */
88 /* Convenience macros */
89 #define virt_to_abs(va) phys_to_abs(__pa(va))
90 #define abs_to_virt(aa) __va(abs_to_phys(aa))
92 #endif /* _ABS_ADDR_H */