1#ifndef _ABS_ADDR_H 2#define _ABS_ADDR_H 3 4#include <linux/config.h> 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> 19 20typedef u32 msChunks_entry; 21struct msChunks { 22 unsigned long num_chunks; 23 unsigned long chunk_size; 24 unsigned long chunk_shift; 25 unsigned long chunk_mask; 26 msChunks_entry *abs; 27}; 28 29extern struct msChunks msChunks; 30 31extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long); 32extern unsigned long reloc_offset(void); 33 34#ifdef CONFIG_MSCHUNKS 35 36static inline unsigned long 37chunk_to_addr(unsigned long chunk) 38{ 39 unsigned long offset = reloc_offset(); 40 struct msChunks *_msChunks = PTRRELOC(&msChunks); 41 42 return chunk << _msChunks->chunk_shift; 43} 44 45static inline unsigned long 46addr_to_chunk(unsigned long addr) 47{ 48 unsigned long offset = reloc_offset(); 49 struct msChunks *_msChunks = PTRRELOC(&msChunks); 50 51 return addr >> _msChunks->chunk_shift; 52} 53 54static inline unsigned long 55chunk_offset(unsigned long addr) 56{ 57 unsigned long offset = reloc_offset(); 58 struct msChunks *_msChunks = PTRRELOC(&msChunks); 59 60 return addr & _msChunks->chunk_mask; 61} 62 63static inline unsigned long 64abs_chunk(unsigned long pchunk) 65{ 66 unsigned long offset = reloc_offset(); 67 struct msChunks *_msChunks = PTRRELOC(&msChunks); 68 if ( pchunk >= _msChunks->num_chunks ) { 69 return pchunk; 70 } 71 return PTRRELOC(_msChunks->abs)[pchunk]; 72} 73 74 75static inline unsigned long 76phys_to_absolute(unsigned long pa) 77{ 78 return chunk_to_addr(abs_chunk(addr_to_chunk(pa))) + chunk_offset(pa); 79} 80 81static inline unsigned long 82physRpn_to_absRpn(unsigned long rpn) 83{ 84 unsigned long pa = rpn << PAGE_SHIFT; 85 unsigned long aa = phys_to_absolute(pa); 86 return (aa >> PAGE_SHIFT); 87} 88 89static inline unsigned long 90absolute_to_phys(unsigned long aa) 91{ 92 return lmb_abs_to_phys(aa); 93} 94 95#else /* !CONFIG_MSCHUNKS */ 96 97#define chunk_to_addr(chunk) ((unsigned long)(chunk)) 98#define addr_to_chunk(addr) (addr) 99#define chunk_offset(addr) (0) 100#define abs_chunk(pchunk) (pchunk) 101 102#define phys_to_absolute(pa) (pa) 103#define physRpn_to_absRpn(rpn) (rpn) 104#define absolute_to_phys(aa) (aa) 105 106#endif /* !CONFIG_MSCHUNKS */ 107 108 109static inline unsigned long 110virt_to_absolute(unsigned long ea) 111{ 112 return phys_to_absolute(__pa(ea)); 113} 114 115static inline unsigned long 116absolute_to_virt(unsigned long aa) 117{ 118 return (unsigned long)__va(absolute_to_phys(aa)); 119} 120 121#endif /* _ABS_ADDR_H */ 122