mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
#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 */
|