arch.h (1496B)
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/* 16 * MAXCPUS refers to the maximum number of CPUs in a single kernel. 17 * This is not necessarily the same as MAXNODES * CPUS_PER_NODE 18 */ 19#define MAXCPUS (MAX_NUMNODES * CPUS_PER_NODE) 20 21/* 22 * This is the maximum number of NASIDS that can be present in a system. 23 * (Highest NASID plus one.) 24 */ 25#define MAX_NASIDS 256 26 27/* 28 * MAX_REGIONS refers to the maximum number of hardware partitioned regions. 29 */ 30#define MAX_REGIONS 64 31#define MAX_NONPREMIUM_REGIONS 16 32#define MAX_PREMIUM_REGIONS MAX_REGIONS 33 34/* 35 * MAX_PARITIONS refers to the maximum number of logically defined 36 * partitions the system can support. 37 */ 38#define MAX_PARTITIONS MAX_REGIONS 39 40#define NASID_MASK_BYTES ((MAX_NASIDS + 7) / 8) 41 42/* 43 * Slot constants for SN0 44 */ 45#ifdef CONFIG_SGI_SN_N_MODE 46#define MAX_MEM_SLOTS 16 /* max slots per node */ 47#else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */ 48#define MAX_MEM_SLOTS 32 /* max slots per node */ 49#endif /* CONFIG_SGI_SN_M_MODE */ 50 51#define SLOT_SHIFT (27) 52#define SLOT_MIN_MEM_SIZE (32*1024*1024) 53 54#define CPUS_PER_NODE 2 /* CPUs on a single hub */ 55 56#endif /* _ASM_SN_SN0_ARCH_H */