#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 <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) /* * 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 */