/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* SGI specific setup.
*
* Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
* Copyright (C) 1999 Ralf Baechle ([email protected])
*/
#ifndef _ASM_SN_ARCH_H
#define _ASM_SN_ARCH_H

#include <linux/types.h>
#include <asm/sn/types.h>
#ifdef CONFIG_SGI_IP27
#include <asm/sn/sn0/arch.h>
#endif

typedef u64 hubreg_t;

#define cputonasid(cpu) (sn_cpu_info[(cpu)].p_nasid)
#define cputoslice(cpu) (sn_cpu_info[(cpu)].p_slice)
#define makespnum(_nasid, _slice) \
(((_nasid) << CPUS_PER_NODE_SHFT) | (_slice))

#define INVALID_NASID (nasid_t)-1
#define INVALID_CNODEID (cnodeid_t)-1
#define INVALID_PNODEID (pnodeid_t)-1
#define INVALID_MODULE (moduleid_t)-1
#define INVALID_PARTID (partid_t)-1

extern nasid_t get_nasid(void);
extern cnodeid_t get_cpu_cnode(cpuid_t);
extern int get_cpu_slice(cpuid_t);

/*
* NO ONE should access these arrays directly. The only reason we refer to
* them here is to avoid the procedure call that would be required in the
* macros below. (Really want private data members here :-)
*/
extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];

/*
* These macros are used by various parts of the kernel to convert
* between the three different kinds of node numbering. At least some
* of them may change to procedure calls in the future, but the macros
* will continue to work. Don't use the arrays above directly.
*/

#define NASID_TO_REGION(nnode) \
((nnode) >> \
(is_fine_dirmode() ? NASID_TO_FINEREG_SHFT : NASID_TO_COARSEREG_SHFT))

extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
extern cnodeid_t cpuid_to_compact_node[MAXCPUS];

#define NASID_TO_COMPACT_NODEID(nnode) (nasid_to_compact_node[nnode])
#define COMPACT_TO_NASID_NODEID(cnode) (compact_to_nasid_node[cnode])
#define CPUID_TO_COMPACT_NODEID(cpu) (cpuid_to_compact_node[(cpu)])

#endif /* _ASM_SN_ARCH_H */