73 lines
2 KiB
C
73 lines
2 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* SGI IP27 specific setup.
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*
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* Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
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* Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
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*/
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#ifndef _ASM_SN_SN0_ARCH_H
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#define _ASM_SN_SN0_ARCH_H
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#include <linux/config.h>
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#ifndef SN0XXL /* 128 cpu SMP max */
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/*
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* This is the maximum number of nodes that can be part of a kernel.
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* Effectively, it's the maximum number of compact node ids (cnodeid_t).
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*/
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#define MAX_COMPACT_NODES 64
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/*
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* MAXCPUS refers to the maximum number of CPUs in a single kernel.
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* This is not necessarily the same as MAXNODES * CPUS_PER_NODE
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*/
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#define MAXCPUS 128
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#else /* SN0XXL system */
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#define MAX_COMPACT_NODES 128
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#define MAXCPUS 256
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#endif /* SN0XXL */
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/*
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* This is the maximum number of NASIDS that can be present in a system.
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* (Highest NASID plus one.)
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*/
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#define MAX_NASIDS 256
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/*
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* MAX_REGIONS refers to the maximum number of hardware partitioned regions.
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*/
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#define MAX_REGIONS 64
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#define MAX_NONPREMIUM_REGIONS 16
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#define MAX_PREMIUM_REGIONS MAX_REGIONS
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/*
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* MAX_PARITIONS refers to the maximum number of logically defined
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* partitions the system can support.
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*/
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#define MAX_PARTITIONS MAX_REGIONS
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#define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8)
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/*
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* Slot constants for SN0
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*/
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#ifdef CONFIG_SGI_SN0_N_MODE
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#define MAX_MEM_SLOTS 16 /* max slots per node */
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#else /* !CONFIG_SGI_SN0_N_MODE, assume M_MODE */
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#define MAX_MEM_SLOTS 32 /* max slots per node */
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#endif /* defined(N_MODE) */
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#define SLOT_SHIFT (27)
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#define SLOT_MIN_MEM_SIZE (32*1024*1024)
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#define CPUS_PER_NODE 2 /* CPUs on a single hub */
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#define CPUS_PER_NODE_SHFT 1 /* Bits to shift in the node number */
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#define CPUS_PER_SUBNODE 2 /* CPUs on a single hub PI */
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#endif /* _ASM_SN_SN0_ARCH_H */
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