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#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 */
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