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
8 * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
9 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
11 #ifndef _ASM_IA64_SN_ARCH_H
12 #define _ASM_IA64_SN_ARCH_H
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>
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.
28 * SGI system can currently support up to 256 C/M nodes plus additional TIO nodes.
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.
34 #define MAX_TIO_NODES MAX_NUMNODES
35 #define MAX_COMPACT_NODES (MAX_NUMNODES + MAX_TIO_NODES)
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.
42 * This value is also the value of the maximum number of NASIDs in the numalink
45 #define MAX_NUMALINK_NODES 16384
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.
52 struct sn_hub_info_s {
59 DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
60 #define sn_hub_info this_cpu_ptr(&__sn_hub_info)
61 #define is_shub2() (sn_hub_info->shub2)
62 #define is_shub1() (sn_hub_info->shub2 == 0)
65 * Use this macro to test if shub 1.1 wars should be enabled
67 #define enable_shub_wars_1_1() (sn_hub_info->shub_1_1_found)
71 * Compact node ID to nasid mappings kept in the per-cpu data areas of each
74 DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
75 #define sn_cnodeid_to_nasid this_cpu_ptr(&__sn_cnodeid_to_nasid[0])
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;
83 extern void sn_flush_all_caches(long addr, long bytes);
84 extern bool sn_cpu_disable_allowed(int cpu);
86 #endif /* _ASM_IA64_SN_ARCH_H */