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109 lines
2.6 KiB
109 lines
2.6 KiB
20 years ago
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#ifndef _ABS_ADDR_H
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#define _ABS_ADDR_H
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#include <linux/config.h>
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/*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/types.h>
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#include <asm/page.h>
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#include <asm/prom.h>
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#include <asm/lmb.h>
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typedef u32 msChunks_entry;
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struct msChunks {
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unsigned long num_chunks;
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unsigned long chunk_size;
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unsigned long chunk_shift;
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unsigned long chunk_mask;
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msChunks_entry *abs;
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};
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extern struct msChunks msChunks;
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extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long);
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extern unsigned long reloc_offset(void);
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#ifdef CONFIG_MSCHUNKS
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static inline unsigned long
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chunk_to_addr(unsigned long chunk)
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{
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unsigned long offset = reloc_offset();
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struct msChunks *_msChunks = PTRRELOC(&msChunks);
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return chunk << _msChunks->chunk_shift;
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}
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static inline unsigned long
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addr_to_chunk(unsigned long addr)
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{
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unsigned long offset = reloc_offset();
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struct msChunks *_msChunks = PTRRELOC(&msChunks);
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return addr >> _msChunks->chunk_shift;
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}
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static inline unsigned long
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chunk_offset(unsigned long addr)
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{
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unsigned long offset = reloc_offset();
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struct msChunks *_msChunks = PTRRELOC(&msChunks);
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return addr & _msChunks->chunk_mask;
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}
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static inline unsigned long
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abs_chunk(unsigned long pchunk)
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{
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unsigned long offset = reloc_offset();
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struct msChunks *_msChunks = PTRRELOC(&msChunks);
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if ( pchunk >= _msChunks->num_chunks ) {
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return pchunk;
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}
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return PTRRELOC(_msChunks->abs)[pchunk];
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}
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/* A macro so it can take pointers or unsigned long. */
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#define phys_to_abs(pa) \
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({ unsigned long _pa = (unsigned long)(pa); \
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chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \
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})
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static inline unsigned long
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physRpn_to_absRpn(unsigned long rpn)
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{
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unsigned long pa = rpn << PAGE_SHIFT;
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unsigned long aa = phys_to_abs(pa);
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return (aa >> PAGE_SHIFT);
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}
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/* A macro so it can take pointers or unsigned long. */
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#define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa))
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#else /* !CONFIG_MSCHUNKS */
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#define chunk_to_addr(chunk) ((unsigned long)(chunk))
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#define addr_to_chunk(addr) (addr)
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#define chunk_offset(addr) (0)
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#define abs_chunk(pchunk) (pchunk)
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#define phys_to_abs(pa) (pa)
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#define physRpn_to_absRpn(rpn) (rpn)
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#define abs_to_phys(aa) (aa)
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#endif /* !CONFIG_MSCHUNKS */
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/* Convenience macros */
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#define virt_to_abs(va) phys_to_abs(__pa(va))
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#define abs_to_virt(aa) __va(abs_to_phys(aa))
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#endif /* _ABS_ADDR_H */
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