include/asm-ia64/sn/arch.h

   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 <asm/types.h>
  15 #include <asm/percpu.h>
  16 #include <asm/sn/types.h>
  17 #include <asm/sn/sn_cpuid.h>
  18
  19 /*
  20  * The following defines attributes of the HUB chip. These attributes are
  21  * frequently referenced. They are kept in the per-cpu data areas of each cpu.
  22  * They are kept together in a struct to minimize cache misses.
  23  */
  24 struct sn_hub_info_s {
  25         u8 shub2;
  26         u8 nasid_shift;
  27         u8 as_shift;
  28         u8 shub_1_1_found;
  29         u16 nasid_bitmask;
  30 };
  31 DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
  32 #define sn_hub_info     (&__get_cpu_var(__sn_hub_info))
  33 #define is_shub2()      (sn_hub_info->shub2)
  34 #define is_shub1()      (sn_hub_info->shub2 == 0)
  35
  36 /*
  37  * Use this macro to test if shub 1.1 wars should be enabled
  38  */
  39 #define enable_shub_wars_1_1()  (sn_hub_info->shub_1_1_found)
  40
  41
  42 /*
  43  * This is the maximum number of nodes that can be part of a kernel.
  44  * Effectively, it's the maximum number of compact node ids (cnodeid_t).
  45  * This is not necessarily the same as MAX_NASIDS.
  46  */
  47 #define MAX_COMPACT_NODES       2048
  48 #define CPUS_PER_NODE           4
  49
  50
  51 /*
  52  * Compact node ID to nasid mappings kept in the per-cpu data areas of each
  53  * cpu.
  54  */
  55 DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
  56 #define sn_cnodeid_to_nasid     (&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
  57
  58
  59
  60 extern u8 sn_partition_id;
  61 extern u8 sn_system_size;
  62 extern u8 sn_sharing_domain_size;
  63 extern u8 sn_region_size;
  64
  65 extern void sn_flush_all_caches(long addr, long bytes);
  66
  67 #endif /* _ASM_IA64_SN_ARCH_H */