| #ifndef _ASM_POWERPC_ABS_ADDR_H |
| #define _ASM_POWERPC_ABS_ADDR_H |
| #ifdef __KERNEL__ |
| |
| |
| /* |
| * 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 <linux/memblock.h> |
| |
| #include <asm/types.h> |
| #include <asm/page.h> |
| #include <asm/prom.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) |
| |
| /* |
| * Converts Virtual Address to Real Address for |
| * Legacy iSeries Hypervisor calls |
| */ |
| #define iseries_hv_addr(virtaddr) \ |
| (0x8000000000000000 | virt_to_abs(virtaddr)) |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_ABS_ADDR_H */ |
