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/* * 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 (ralf@gnu.org) */ #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 */