1#ifndef _ABS_ADDR_H
2#define _ABS_ADDR_H
3
4#include <linux/config.h>
5
6/*
7 * c 2001 PPC 64 Team, IBM Corp
8 *
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.
13 */
14
15#include <asm/types.h>
16#include <asm/page.h>
17#include <asm/prom.h>
18#include <asm/lmb.h>
19
20typedef u32 msChunks_entry;
21struct msChunks {
22        unsigned long num_chunks;
23        unsigned long chunk_size;
24        unsigned long chunk_shift;
25        unsigned long chunk_mask;
26        msChunks_entry *abs;
27};
28
29extern struct msChunks msChunks;
30
31extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long);
32extern unsigned long reloc_offset(void);
33
34#ifdef CONFIG_MSCHUNKS
35
36static inline unsigned long
37chunk_to_addr(unsigned long chunk)
38{
39	unsigned long offset = reloc_offset();
40	struct msChunks *_msChunks = PTRRELOC(&msChunks);
41
42	return chunk << _msChunks->chunk_shift;
43}
44
45static inline unsigned long
46addr_to_chunk(unsigned long addr)
47{
48	unsigned long offset = reloc_offset();
49	struct msChunks *_msChunks = PTRRELOC(&msChunks);
50
51	return addr >> _msChunks->chunk_shift;
52}
53
54static inline unsigned long
55chunk_offset(unsigned long addr)
56{
57	unsigned long offset = reloc_offset();
58	struct msChunks *_msChunks = PTRRELOC(&msChunks);
59
60	return addr & _msChunks->chunk_mask;
61}
62
63static inline unsigned long
64abs_chunk(unsigned long pchunk)
65{
66	unsigned long offset = reloc_offset();
67	struct msChunks *_msChunks = PTRRELOC(&msChunks);
68	if ( pchunk >= _msChunks->num_chunks ) {
69		return pchunk;
70	}
71	return PTRRELOC(_msChunks->abs)[pchunk];
72}
73
74
75static inline unsigned long
76phys_to_absolute(unsigned long pa)
77{
78	return chunk_to_addr(abs_chunk(addr_to_chunk(pa))) + chunk_offset(pa);
79}
80
81static inline unsigned long
82physRpn_to_absRpn(unsigned long rpn)
83{
84	unsigned long pa = rpn << PAGE_SHIFT;
85	unsigned long aa = phys_to_absolute(pa);
86	return (aa >> PAGE_SHIFT);
87}
88
89static inline unsigned long
90absolute_to_phys(unsigned long aa)
91{
92	return lmb_abs_to_phys(aa);
93}
94
95#else  /* !CONFIG_MSCHUNKS */
96
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)
101
102#define phys_to_absolute(pa) (pa)
103#define physRpn_to_absRpn(rpn) (rpn)
104#define absolute_to_phys(aa) (aa)
105
106#endif /* !CONFIG_MSCHUNKS */
107
108
109static inline unsigned long
110virt_to_absolute(unsigned long ea)
111{
112	return phys_to_absolute(__pa(ea));
113}
114
115static inline unsigned long
116absolute_to_virt(unsigned long aa)
117{
118	return (unsigned long)__va(absolute_to_phys(aa));
119}
120
121#endif /* _ABS_ADDR_H */
122