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David Gibson8882a4d2005-11-09 13:38:01 +11001#ifndef _ASM_POWERPC_ABS_ADDR_H
2#define _ASM_POWERPC_ABS_ADDR_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
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>
Michael Ellermanbef56862005-08-03 20:21:26 +100019#include <asm/firmware.h>
Michael Ellerman56e97b72005-08-03 20:21:23 +100020
21struct mschunks_map {
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 unsigned long num_chunks;
23 unsigned long chunk_size;
24 unsigned long chunk_shift;
25 unsigned long chunk_mask;
Michael Ellerman56e97b72005-08-03 20:21:23 +100026 u32 *mapping;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027};
28
Michael Ellerman56e97b72005-08-03 20:21:23 +100029extern struct mschunks_map mschunks_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Michael Ellerman34c8f692005-08-03 20:21:23 +100031/* Chunks are 256 KB */
32#define MSCHUNKS_CHUNK_SHIFT (18)
33#define MSCHUNKS_CHUNK_SIZE (1UL << MSCHUNKS_CHUNK_SHIFT)
34#define MSCHUNKS_OFFSET_MASK (MSCHUNKS_CHUNK_SIZE - 1)
35
Michael Ellerman38e85dc2005-08-03 20:21:23 +100036static inline unsigned long chunk_to_addr(unsigned long chunk)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
Michael Ellerman34c8f692005-08-03 20:21:23 +100038 return chunk << MSCHUNKS_CHUNK_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039}
40
Michael Ellerman38e85dc2005-08-03 20:21:23 +100041static inline unsigned long addr_to_chunk(unsigned long addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070042{
Michael Ellerman34c8f692005-08-03 20:21:23 +100043 return addr >> MSCHUNKS_CHUNK_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044}
45
Michael Ellermance217952005-08-03 20:21:23 +100046static inline unsigned long phys_to_abs(unsigned long pa)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Michael Ellermance217952005-08-03 20:21:23 +100048 unsigned long chunk;
49
Michael Ellermanbef56862005-08-03 20:21:26 +100050 /* This is a no-op on non-iSeries */
51 if (!firmware_has_feature(FW_FEATURE_ISERIES))
52 return pa;
53
Michael Ellermance217952005-08-03 20:21:23 +100054 chunk = addr_to_chunk(pa);
55
56 if (chunk < mschunks_map.num_chunks)
57 chunk = mschunks_map.mapping[chunk];
58
59 return chunk_to_addr(chunk) + (pa & MSCHUNKS_OFFSET_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060}
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062/* Convenience macros */
63#define virt_to_abs(va) phys_to_abs(__pa(va))
Michael Ellermane88bcd12005-08-03 20:21:25 +100064#define abs_to_virt(aa) __va(aa)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Stephen Rothwell426c1a12005-10-14 14:51:42 +100066/*
67 * Converts Virtual Address to Real Address for
68 * Legacy iSeries Hypervisor calls
69 */
70#define iseries_hv_addr(virtaddr) \
71 (0x8000000000000000 | virt_to_abs(virtaddr))
72
David Gibson8882a4d2005-11-09 13:38:01 +110073#endif /* _ASM_POWERPC_ABS_ADDR_H */