| #ifndef _ABS_ADDR_H | |
| #define _ABS_ADDR_H | |
| #include <linux/config.h> | |
| /* | |
| * c 2001 PPC 64 Team, IBM Corp | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation; either version | |
| * 2 of the License, or (at your option) any later version. | |
| */ | |
| #include <asm/types.h> | |
| #include <asm/page.h> | |
| #include <asm/prom.h> | |
| #include <asm/lmb.h> | |
| #include <asm/firmware.h> | |
| struct mschunks_map { | |
| unsigned long num_chunks; | |
| unsigned long chunk_size; | |
| unsigned long chunk_shift; | |
| unsigned long chunk_mask; | |
| u32 *mapping; | |
| }; | |
| extern struct mschunks_map mschunks_map; | |
| /* Chunks are 256 KB */ | |
| #define MSCHUNKS_CHUNK_SHIFT (18) | |
| #define MSCHUNKS_CHUNK_SIZE (1UL << MSCHUNKS_CHUNK_SHIFT) | |
| #define MSCHUNKS_OFFSET_MASK (MSCHUNKS_CHUNK_SIZE - 1) | |
| static inline unsigned long chunk_to_addr(unsigned long chunk) | |
| { | |
| return chunk << MSCHUNKS_CHUNK_SHIFT; | |
| } | |
| static inline unsigned long addr_to_chunk(unsigned long addr) | |
| { | |
| return addr >> MSCHUNKS_CHUNK_SHIFT; | |
| } | |
| static inline unsigned long phys_to_abs(unsigned long pa) | |
| { | |
| unsigned long chunk; | |
| /* This is a no-op on non-iSeries */ | |
| if (!firmware_has_feature(FW_FEATURE_ISERIES)) | |
| return pa; | |
| chunk = addr_to_chunk(pa); | |
| if (chunk < mschunks_map.num_chunks) | |
| chunk = mschunks_map.mapping[chunk]; | |
| return chunk_to_addr(chunk) + (pa & MSCHUNKS_OFFSET_MASK); | |
| } | |
| /* Convenience macros */ | |
| #define virt_to_abs(va) phys_to_abs(__pa(va)) | |
| #define abs_to_virt(aa) __va(aa) | |
| #endif /* _ABS_ADDR_H */ |