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 specific setup. 7 * 8 * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc. All rights reserved. 9 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org) 10 */ 11 #ifndef _ASM_IA64_SN_ARCH_H 12 #define _ASM_IA64_SN_ARCH_H 13 14 #include <linux/numa.h> 15 #include <asm/types.h> 16 #include <asm/percpu.h> 17 #include <asm/sn/types.h> 18 #include <asm/sn/sn_cpuid.h> 19 20 /* 21 * This is the maximum number of NUMALINK nodes that can be part of a single 22 * SSI kernel. This number includes C-brick, M-bricks, and TIOs. Nodes in 23 * remote partitions are NOT included in this number. 24 * The number of compact nodes cannot exceed size of a coherency domain. 25 * The purpose of this define is to specify a node count that includes 26 * all C/M/TIO nodes in an SSI system. 27 * 28 * SGI system can currently support up to 256 C/M nodes plus additional TIO nodes. 29 * 30 * Note: ACPI20 has an architectural limit of 256 nodes. When we upgrade 31 * to ACPI3.0, this limit will be removed. The notion of "compact nodes" 32 * should be deleted and TIOs should be included in MAX_NUMNODES. 33 */ 34 #define MAX_TIO_NODES MAX_NUMNODES 35 #define MAX_COMPACT_NODES (MAX_NUMNODES + MAX_TIO_NODES) 36 37 /* 38 * Maximum number of nodes in all partitions and in all coherency domains. 39 * This is the total number of nodes accessible in the numalink fabric. It 40 * includes all C & M bricks, plus all TIOs. 41 * 42 * This value is also the value of the maximum number of NASIDs in the numalink 43 * fabric. 44 */ 45 #define MAX_NUMALINK_NODES 16384 46 47 /* 48 * The following defines attributes of the HUB chip. These attributes are 49 * frequently referenced. They are kept in the per-cpu data areas of each cpu. 50 * They are kept together in a struct to minimize cache misses. 51 */ 52 struct sn_hub_info_s { 53 u8 shub2; 54 u8 nasid_shift; 55 u8 as_shift; 56 u8 shub_1_1_found; 57 u16 nasid_bitmask; 58 }; 59 DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info); 60 #define sn_hub_info (&__get_cpu_var(__sn_hub_info)) 61 #define is_shub2() (sn_hub_info->shub2) 62 #define is_shub1() (sn_hub_info->shub2 == 0) 63 64 /* 65 * Use this macro to test if shub 1.1 wars should be enabled 66 */ 67 #define enable_shub_wars_1_1() (sn_hub_info->shub_1_1_found) 68 69 70 /* 71 * Compact node ID to nasid mappings kept in the per-cpu data areas of each 72 * cpu. 73 */ 74 DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]); 75 #define sn_cnodeid_to_nasid (&__get_cpu_var(__sn_cnodeid_to_nasid[0])) 76 77 78 extern u8 sn_partition_id; 79 extern u8 sn_system_size; 80 extern u8 sn_sharing_domain_size; 81 extern u8 sn_region_size; 82 83 extern void sn_flush_all_caches(long addr, long bytes); 84 extern bool sn_cpu_disable_allowed(int cpu); 85 86 #endif /* _ASM_IA64_SN_ARCH_H */ 87