24ee0a6d7b
Some of the SN code & #defines related to compact nodes & IO discovery have gotten stale over the years. This patch attempts to clean them up. Some of the various SN MAX_xxx #defines were also unclear & misused. The primary changes are: - use MAX_NUMNODES. This is the generic linux #define for the number of nodes that are known to the generic kernel. Arrays & loops for constructs that are 1:1 with linux-defined nodes should use the linux #define - not an SN equivalent. - use MAX_COMPACT_NODES for MAX_NUMNODES + NUM_TIOS. This is the number of nodes in the SSI system. Compact nodes are a hack to get around the IA64 architectural limit of 256 nodes. Large SGI systems have more than 256 nodes. When we upgrade to ACPI3.0, I _hope_ that all nodes will be real nodes that are known to the generic kernel. That will allow us to delete the notion of "compact nodes". - add MAX_NUMALINK_NODES for the total number of nodes that are in the numalink domain - all partitions. - simplified (understandable) scan_for_ionodes() - small amount of cleanup related to cnodes Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* SGI specific setup.
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*
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* Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
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* Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
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*/
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#ifndef _ASM_IA64_SN_ARCH_H
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#define _ASM_IA64_SN_ARCH_H
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#include <linux/numa.h>
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#include <asm/types.h>
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#include <asm/percpu.h>
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#include <asm/sn/types.h>
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#include <asm/sn/sn_cpuid.h>
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/*
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* This is the maximum number of NUMALINK nodes that can be part of a single
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* SSI kernel. This number includes C-brick, M-bricks, and TIOs. Nodes in
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* remote partitions are NOT included in this number.
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* The number of compact nodes cannot exceed size of a coherency domain.
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* The purpose of this define is to specify a node count that includes
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* all C/M/TIO nodes in an SSI system.
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*
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* SGI system can currently support up to 256 C/M nodes plus additional TIO nodes.
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*
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* Note: ACPI20 has an architectural limit of 256 nodes. When we upgrade
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* to ACPI3.0, this limit will be removed. The notion of "compact nodes"
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* should be deleted and TIOs should be included in MAX_NUMNODES.
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*/
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#define MAX_COMPACT_NODES 512
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/*
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* Maximum number of nodes in all partitions and in all coherency domains.
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* This is the total number of nodes accessible in the numalink fabric. It
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* includes all C & M bricks, plus all TIOs.
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*
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* This value is also the value of the maximum number of NASIDs in the numalink
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* fabric.
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*/
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#define MAX_NUMALINK_NODES 2048
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/*
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* The following defines attributes of the HUB chip. These attributes are
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* frequently referenced. They are kept in the per-cpu data areas of each cpu.
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* They are kept together in a struct to minimize cache misses.
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*/
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struct sn_hub_info_s {
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u8 shub2;
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u8 nasid_shift;
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u8 as_shift;
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u8 shub_1_1_found;
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u16 nasid_bitmask;
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};
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DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
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#define sn_hub_info (&__get_cpu_var(__sn_hub_info))
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#define is_shub2() (sn_hub_info->shub2)
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#define is_shub1() (sn_hub_info->shub2 == 0)
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/*
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* Use this macro to test if shub 1.1 wars should be enabled
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*/
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#define enable_shub_wars_1_1() (sn_hub_info->shub_1_1_found)
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/*
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* Compact node ID to nasid mappings kept in the per-cpu data areas of each
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* cpu.
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*/
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DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
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#define sn_cnodeid_to_nasid (&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
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extern u8 sn_partition_id;
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extern u8 sn_system_size;
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extern u8 sn_sharing_domain_size;
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extern u8 sn_region_size;
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extern void sn_flush_all_caches(long addr, long bytes);
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#endif /* _ASM_IA64_SN_ARCH_H */
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