kernel-ark/include/asm-ppc64/abs_addr.h
Stephen Rothwell 426c1a11a6 powerpc: move iSeries/iSeries_pci.h to platforms/iseries
The only real user of this file outside platforms/iseries was
drivers/net/iseries_veth.c but all it wanted was ISERIES_HV_ADDR()
so we move that to abs_addr.h (and lowercase it).

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-10-14 14:51:42 +10:00

74 lines
1.7 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>
#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 /* _ABS_ADDR_H */