53 lines
1.5 KiB
C
53 lines
1.5 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) 1995-1997,1999,2001-2004 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 <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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* 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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* This is the maximum number of nodes that can be part of a kernel.
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* Effectively, it's the maximum number of compact node ids (cnodeid_t).
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* This is not necessarily the same as MAX_NASIDS.
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*/
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#define MAX_COMPACT_NODES 2048
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#define CPUS_PER_NODE 4
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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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