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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | #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> typedef u32 msChunks_entry; struct msChunks { unsigned long num_chunks; unsigned long chunk_size; unsigned long chunk_shift; unsigned long chunk_mask; msChunks_entry *abs; }; extern struct msChunks msChunks; extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long); extern unsigned long reloc_offset(void); #ifdef CONFIG_MSCHUNKS static inline unsigned long chunk_to_addr(unsigned long chunk) { unsigned long offset = reloc_offset(); struct msChunks *_msChunks = PTRRELOC(&msChunks); return chunk << _msChunks->chunk_shift; } static inline unsigned long addr_to_chunk(unsigned long addr) { unsigned long offset = reloc_offset(); struct msChunks *_msChunks = PTRRELOC(&msChunks); return addr >> _msChunks->chunk_shift; } static inline unsigned long chunk_offset(unsigned long addr) { unsigned long offset = reloc_offset(); struct msChunks *_msChunks = PTRRELOC(&msChunks); return addr & _msChunks->chunk_mask; } static inline unsigned long abs_chunk(unsigned long pchunk) { unsigned long offset = reloc_offset(); struct msChunks *_msChunks = PTRRELOC(&msChunks); if ( pchunk >= _msChunks->num_chunks ) { return pchunk; } return PTRRELOC(_msChunks->abs)[pchunk]; } /* A macro so it can take pointers or unsigned long. */ #define phys_to_abs(pa) \ ({ unsigned long _pa = (unsigned long)(pa); \ chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \ }) static inline unsigned long physRpn_to_absRpn(unsigned long rpn) { unsigned long pa = rpn << PAGE_SHIFT; unsigned long aa = phys_to_abs(pa); return (aa >> PAGE_SHIFT); } /* A macro so it can take pointers or unsigned long. */ #define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa)) #else /* !CONFIG_MSCHUNKS */ #define chunk_to_addr(chunk) ((unsigned long)(chunk)) #define addr_to_chunk(addr) (addr) #define chunk_offset(addr) (0) #define abs_chunk(pchunk) (pchunk) #define phys_to_abs(pa) (pa) #define physRpn_to_absRpn(rpn) (rpn) #define abs_to_phys(aa) (aa) #endif /* !CONFIG_MSCHUNKS */ /* Convenience macros */ #define virt_to_abs(va) phys_to_abs(__pa(va)) #define abs_to_virt(aa) __va(abs_to_phys(aa)) #endif /* _ABS_ADDR_H */ |