1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * SGI IP27 specific setup. 7 * 8 * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc. 9 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org) 10 */ 11#ifndef _ASM_SN_SN0_ARCH_H 12#define _ASM_SN_SN0_ARCH_H 13 14 15#ifndef SN0XXL /* 128 cpu SMP max */ 16/* 17 * This is the maximum number of nodes that can be part of a kernel. 18 * Effectively, it's the maximum number of compact node ids (cnodeid_t). 19 */ 20#define MAX_COMPACT_NODES 64 21 22/* 23 * MAXCPUS refers to the maximum number of CPUs in a single kernel. 24 * This is not necessarily the same as MAXNODES * CPUS_PER_NODE 25 */ 26#define MAXCPUS 128 27 28#else /* SN0XXL system */ 29 30#define MAX_COMPACT_NODES 128 31#define MAXCPUS 256 32 33#endif /* SN0XXL */ 34 35/* 36 * This is the maximum number of NASIDS that can be present in a system. 37 * (Highest NASID plus one.) 38 */ 39#define MAX_NASIDS 256 40 41/* 42 * MAX_REGIONS refers to the maximum number of hardware partitioned regions. 43 */ 44#define MAX_REGIONS 64 45#define MAX_NONPREMIUM_REGIONS 16 46#define MAX_PREMIUM_REGIONS MAX_REGIONS 47 48/* 49 * MAX_PARITIONS refers to the maximum number of logically defined 50 * partitions the system can support. 51 */ 52#define MAX_PARTITIONS MAX_REGIONS 53 54#define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8) 55 56/* 57 * Slot constants for SN0 58 */ 59#ifdef CONFIG_SGI_SN_N_MODE 60#define MAX_MEM_SLOTS 16 /* max slots per node */ 61#else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */ 62#define MAX_MEM_SLOTS 32 /* max slots per node */ 63#endif /* CONFIG_SGI_SN_M_MODE */ 64 65#define SLOT_SHIFT (27) 66#define SLOT_MIN_MEM_SIZE (32*1024*1024) 67 68#define CPUS_PER_NODE 2 /* CPUs on a single hub */ 69#define CPUS_PER_NODE_SHFT 1 /* Bits to shift in the node number */ 70#define CPUS_PER_SUBNODE 2 /* CPUs on a single hub PI */ 71 72#endif /* _ASM_SN_SN0_ARCH_H */ 73