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 */
52struct 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};
59DECLARE_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 */
74DECLARE_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
78extern u8 sn_partition_id;
79extern u8 sn_system_size;
80extern u8 sn_sharing_domain_size;
81extern u8 sn_region_size;
82
83extern void sn_flush_all_caches(long addr, long bytes);
84
85#endif /* _ASM_IA64_SN_ARCH_H */
86