/*
* 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 IP27 specific setup.
*
* Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
* Copyright (C) 1999 Ralf Baechle ([email protected])
*/
#ifndef _ASM_SN_SN0_ARCH_H
#define _ASM_SN_SN0_ARCH_H


#ifndef SN0XXL /* 128 cpu SMP max */
/*
* This is the maximum number of nodes that can be part of a kernel.
* Effectively, it's the maximum number of compact node ids (cnodeid_t).
*/
#define MAX_COMPACT_NODES 64

/*
* MAXCPUS refers to the maximum number of CPUs in a single kernel.
* This is not necessarily the same as MAXNODES * CPUS_PER_NODE
*/
#define MAXCPUS 128

#else /* SN0XXL system */

#define MAX_COMPACT_NODES 128
#define MAXCPUS 256

#endif /* SN0XXL */

/*
* This is the maximum number of NASIDS that can be present in a system.
* (Highest NASID plus one.)
*/
#define MAX_NASIDS 256

/*
* MAX_REGIONS refers to the maximum number of hardware partitioned regions.
*/
#define MAX_REGIONS 64
#define MAX_NONPREMIUM_REGIONS 16
#define MAX_PREMIUM_REGIONS MAX_REGIONS

/*
* MAX_PARITIONS refers to the maximum number of logically defined
* partitions the system can support.
*/
#define MAX_PARTITIONS MAX_REGIONS

#define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8)

/*
* Slot constants for SN0
*/
#ifdef CONFIG_SGI_SN_N_MODE
#define MAX_MEM_SLOTS 16 /* max slots per node */
#else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */
#define MAX_MEM_SLOTS 32 /* max slots per node */
#endif /* CONFIG_SGI_SN_M_MODE */

#define SLOT_SHIFT (27)
#define SLOT_MIN_MEM_SIZE (32*1024*1024)

#define CPUS_PER_NODE 2 /* CPUs on a single hub */
#define CPUS_PER_NODE_SHFT 1 /* Bits to shift in the node number */
#define CPUS_PER_SUBNODE 2 /* CPUs on a single hub PI */

#endif /* _ASM_SN_SN0_ARCH_H */