- #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];
- }
- static inline unsigned long
- phys_to_absolute(unsigned long pa)
- {
- return 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_absolute(pa);
- return (aa >> PAGE_SHIFT);
- }
- static inline unsigned long
- absolute_to_phys(unsigned long aa)
- {
- return lmb_abs_to_phys(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_absolute(pa) (pa)
- #define physRpn_to_absRpn(rpn) (rpn)
- #define absolute_to_phys(aa) (aa)
- #endif /* !CONFIG_MSCHUNKS */
- static inline unsigned long
- virt_to_absolute(unsigned long ea)
- {
- return phys_to_absolute(__pa(ea));
- }
- static inline unsigned long
- absolute_to_virt(unsigned long aa)
- {
- return (unsigned long)__va(absolute_to_phys(aa));
- }
- #endif /* _ABS_ADDR_H */