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review.evervolv.com / android_kernel_htc_msm8960 / 9b823b43ff308c914530ec7fde5e2d79cb37b51a / . / include / asm-powerpc / abs_addr.h
blob: 4aa220718b19a09b00cd137ca384bc4a7fa9f292 [file] [log] [blame]
David Gibson8882a4d2005-11-09 13:38:01 +1100[diff] [blame]1#ifndef _ASM_POWERPC_ABS_ADDR_H
2#define _ASM_POWERPC_ABS_ADDR_H
Arnd Bergmann88ced032005-12-16 22:43:46 +0100[diff] [blame]3#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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 +1000[diff] [blame]19#include <asm/firmware.h>
Michael Ellerman56e97b72005-08-03 20:21:23 +1000[diff] [blame]20
21struct mschunks_map {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22 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 +1000[diff] [blame]26 u32 *mapping;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]27};
28
Michael Ellerman56e97b72005-08-03 20:21:23 +1000[diff] [blame]29extern struct mschunks_map mschunks_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]30
Michael Ellerman34c8f692005-08-03 20:21:23 +1000[diff] [blame]31/* 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 +1000[diff] [blame]36static inline unsigned long chunk_to_addr(unsigned long chunk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]37{
Michael Ellerman34c8f692005-08-03 20:21:23 +1000[diff] [blame]38 return chunk << MSCHUNKS_CHUNK_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]39}
40
Michael Ellerman38e85dc2005-08-03 20:21:23 +1000[diff] [blame]41static inline unsigned long addr_to_chunk(unsigned long addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]42{
Michael Ellerman34c8f692005-08-03 20:21:23 +1000[diff] [blame]43 return addr >> MSCHUNKS_CHUNK_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]44}
45
Michael Ellermance217952005-08-03 20:21:23 +1000[diff] [blame]46static inline unsigned long phys_to_abs(unsigned long pa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]47{
Michael Ellermance217952005-08-03 20:21:23 +1000[diff] [blame]48 unsigned long chunk;
49
Michael Ellermanbef56862005-08-03 20:21:26 +1000[diff] [blame]50 /* 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 +1000[diff] [blame]54 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 -0700[diff] [blame]60}
61
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]62/* Convenience macros */
63#define virt_to_abs(va) phys_to_abs(__pa(va))
Michael Ellermane88bcd12005-08-03 20:21:25 +1000[diff] [blame]64#define abs_to_virt(aa) __va(aa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]65
Stephen Rothwell426c1a12005-10-14 14:51:42 +1000[diff] [blame]66/*
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
Arnd Bergmann88ced032005-12-16 22:43:46 +0100[diff] [blame]73#endif /* __KERNEL__ */
David Gibson8882a4d2005-11-09 13:38:01 +1100[diff] [blame]74#endif /* _ASM_POWERPC_ABS_ADDR_H */