projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8882a4da DG |
1 | #ifndef _ASM_POWERPC_ABS_ADDR_H |
| 2 | #define _ASM_POWERPC_ABS_ADDR_H | |
| 88ced031 | 3 | #ifdef __KERNEL__ |
| 1da177e4 | 4 | |
| 1da177e4 LT |
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> | |
| bef56862 | 19 | #include <asm/firmware.h> |
| 56e97b71 ME |
20 | |
| 21 | struct mschunks_map { | |
| 1da177e4 LT |
22 | unsigned long num_chunks; |
| 23 | unsigned long chunk_size; | |
| 24 | unsigned long chunk_shift; | |
| 25 | unsigned long chunk_mask; | |
| 56e97b71 | 26 | u32 *mapping; |
| 1da177e4 LT |
27 | }; |
| 28 | ||
| 56e97b71 | 29 | extern struct mschunks_map mschunks_map; |
| 1da177e4 | 30 | |
| 34c8f696 ME |
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 | ||
| 38e85dc1 | 36 | static inline unsigned long chunk_to_addr(unsigned long chunk) |
| 1da177e4 | 37 | { |
| 34c8f696 | 38 | return chunk << MSCHUNKS_CHUNK_SHIFT; |
| 1da177e4 LT |
39 | } |
| 40 | ||
| 38e85dc1 | 41 | static inline unsigned long addr_to_chunk(unsigned long addr) |
| 1da177e4 | 42 | { |
| 34c8f696 | 43 | return addr >> MSCHUNKS_CHUNK_SHIFT; |
| 1da177e4 LT |
44 | } |
| 45 | ||
| ce217952 | 46 | static inline unsigned long phys_to_abs(unsigned long pa) |
| 1da177e4 | 47 | { |
| ce217952 | 48 | unsigned long chunk; |
| 1da177e4 | 49 | |
| bef56862 ME |
50 | /* This is a no-op on non-iSeries */ |
| 51 | if (!firmware_has_feature(FW_FEATURE_ISERIES)) | |
| 52 | return pa; | |
| 53 | ||
| ce217952 | 54 | chunk = addr_to_chunk(pa); |
| 38e85dc1 | 55 | |
| ce217952 ME |
56 | if (chunk < mschunks_map.num_chunks) |
| 57 | chunk = mschunks_map.mapping[chunk]; | |
| 1da177e4 | 58 | |
| ce217952 ME |
59 | return chunk_to_addr(chunk) + (pa & MSCHUNKS_OFFSET_MASK); |
| 60 | } | |
| 1da177e4 | 61 | |
| 1da177e4 LT |
62 | /* Convenience macros */ |
| 63 | #define virt_to_abs(va) phys_to_abs(__pa(va)) | |
| e88bcd1b | 64 | #define abs_to_virt(aa) __va(aa) |
| 1da177e4 | 65 | |
| 426c1a11 SR |
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 | ||
| 88ced031 | 73 | #endif /* __KERNEL__ */ |
| 8882a4da | 74 | #endif /* _ASM_POWERPC_ABS_ADDR_H */ |