linux/arch/powerpc/include/asm/abs_addr.h
Stephen Rothwell b8b572e101 powerpc: Move include files to arch/powerpc/include/asm
from include/asm-powerpc.  This is the result of a

mkdir arch/powerpc/include/asm
git mv include/asm-powerpc/* arch/powerpc/include/asm

Followed by a few documentation/comment fixups and a couple of places
where <asm-powepc/...> was being used explicitly.  Of the latter only
one was outside the arch code and it is a driver only built for powerpc.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-04 12:02:00 +10:00

75 lines
1.8 KiB
C

#ifndef _ASM_POWERPC_ABS_ADDR_H
#define _ASM_POWERPC_ABS_ADDR_H
#ifdef __KERNEL__
/*
* 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 <linux/lmb.h>
#include <asm/types.h>
#include <asm/page.h>
#include <asm/prom.h>
#include <asm/firmware.h>
struct mschunks_map {
unsigned long num_chunks;
unsigned long chunk_size;
unsigned long chunk_shift;
unsigned long chunk_mask;
u32 *mapping;
};
extern struct mschunks_map mschunks_map;
/* Chunks are 256 KB */
#define MSCHUNKS_CHUNK_SHIFT (18)
#define MSCHUNKS_CHUNK_SIZE (1UL << MSCHUNKS_CHUNK_SHIFT)
#define MSCHUNKS_OFFSET_MASK (MSCHUNKS_CHUNK_SIZE - 1)
static inline unsigned long chunk_to_addr(unsigned long chunk)
{
return chunk << MSCHUNKS_CHUNK_SHIFT;
}
static inline unsigned long addr_to_chunk(unsigned long addr)
{
return addr >> MSCHUNKS_CHUNK_SHIFT;
}
static inline unsigned long phys_to_abs(unsigned long pa)
{
unsigned long chunk;
/* This is a no-op on non-iSeries */
if (!firmware_has_feature(FW_FEATURE_ISERIES))
return pa;
chunk = addr_to_chunk(pa);
if (chunk < mschunks_map.num_chunks)
chunk = mschunks_map.mapping[chunk];
return chunk_to_addr(chunk) + (pa & MSCHUNKS_OFFSET_MASK);
}
/* Convenience macros */
#define virt_to_abs(va) phys_to_abs(__pa(va))
#define abs_to_virt(aa) __va(aa)
/*
* Converts Virtual Address to Real Address for
* Legacy iSeries Hypervisor calls
*/
#define iseries_hv_addr(virtaddr) \
(0x8000000000000000 | virt_to_abs(virtaddr))
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_ABS_ADDR_H */