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/* $Id: arch.h,v 1.1 2002/02/28 17:31:25 marcelo Exp $
*
* 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.
*
* Copyright (C) 1992 - 1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_IA64_SN_SN2_ARCH_H
#define _ASM_IA64_SN_SN2_ARCH_H
#include <asm/types.h>
#define CPUS_PER_NODE 4 /* CPUs on a single hub */
#define CPUS_PER_SUBNODE 4 /* CPUs on a single hub PI */
/*
* This is the maximum number of NASIDS that can be present in a system.
* (Highest NASID plus one.)
*/
#define MAX_NASIDS 2048
/*
* 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).
* This is not necessarily the same as MAX_NASIDS.
*/
#define MAX_COMPACT_NODES 128
/*
* 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)
/*
* 1 FSB per SHUB, with up to 4 cpus per FSB.
*/
#define NUM_SUBNODES 1
#define SUBNODE_SHFT 0
#define SUBNODE_MASK (0x0 << SUBNODE_SHFT)
#define LOCALCPU_SHFT 0
#define LOCALCPU_MASK (0x3 << LOCALCPU_SHFT)
#define SUBNODE(slice) (((slice) & SUBNODE_MASK) >> SUBNODE_SHFT)
#define LOCALCPU(slice) (((slice) & LOCALCPU_MASK) >> LOCALCPU_SHFT)
#define TO_SLICE(subn, local) (((subn) << SUBNODE_SHFT) | \
((local) << LOCALCPU_SHFT))
#endif /* _ASM_IA64_SN_SN2_ARCH_H */
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