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#include <linux/config.h> 15 16#ifndef SABLE 17 18#ifndef SN0XXL /* 128 cpu SMP max */ 19/* 20 * This is the maximum number of nodes that can be part of a kernel. 21 * Effectively, it's the maximum number of compact node ids (cnodeid_t). 22 */ 23#define MAX_COMPACT_NODES 64 24 25/* 26 * MAXCPUS refers to the maximum number of CPUs in a single kernel. 27 * This is not necessarily the same as MAXNODES * CPUS_PER_NODE 28 */ 29#define MAXCPUS 128 30 31#else /* SN0XXL system */ 32 33#define MAX_COMPACT_NODES 128 34#define MAXCPUS 256 35 36#endif /* SN0XXL */ 37 38/* 39 * This is the maximum number of NASIDS that can be present in a system. 40 * (Highest NASID plus one.) 41 */ 42#define MAX_NASIDS 256 43 44/* 45 * MAX_REGIONS refers to the maximum number of hardware partitioned regions. 46 */ 47#define MAX_REGIONS 64 48#define MAX_NONPREMIUM_REGIONS 16 49#define MAX_PREMIUM_REGIONS MAX_REGIONS 50 51/* 52 * MAX_PARITIONS refers to the maximum number of logically defined 53 * partitions the system can support. 54 */ 55#define MAX_PARTITIONS MAX_REGIONS 56 57 58#else 59 60#define MAX_COMPACT_NODES 4 61#define MAX_NASIDS 4 62#define MAXCPUS 8 63 64#endif 65 66#define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8) 67 68/* 69 * Slot constants for SN0 70 */ 71#ifdef CONFIG_SGI_SN0_N_MODE 72#define MAX_MEM_SLOTS 16 /* max slots per node */ 73#else /* !CONFIG_SGI_SN0_N_MODE, assume M_MODE */ 74#define MAX_MEM_SLOTS 32 /* max slots per node */ 75#endif /* defined(N_MODE) */ 76 77#if SABLE_RTL 78#define SLOT_SHIFT (28) 79#define SLOT_MIN_MEM_SIZE (16*1024*1024) 80#else 81#define SLOT_SHIFT (27) 82#define SLOT_MIN_MEM_SIZE (32*1024*1024) 83#endif 84 85#endif /* _ASM_SN_SN0_ARCH_H */ 86