include/asm-ia64/sn/sn2/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  * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
   7  */
   8 #ifndef _ASM_IA64_SN_SN2_ARCH_H
   9 #define _ASM_IA64_SN_SN2_ARCH_H
  10
  11 #define CPUS_PER_NODE           4       /* CPUs on a single hub */
  12 #define CPUS_PER_SUBNODE        4       /* CPUs on a single hub PI */
  13
  14
  15 /*
  16  * This is the maximum number of NASIDS that can be present in a system.
  17  * (Highest NASID plus one.)
  18  */
  19 #define MAX_NASIDS              2048
  20
  21
  22 /*
  23  * This is the maximum number of nodes that can be part of a kernel.
  24  * Effectively, it's the maximum number of compact node ids (cnodeid_t).
  25  * This is not necessarily the same as MAX_NASIDS.
  26  */
  27 #define MAX_COMPACT_NODES       2048
  28
  29 /*
  30  * MAX_REGIONS refers to the maximum number of hardware partitioned regions.
  31  */
  32 #define MAX_REGIONS             64
  33 #define MAX_NONPREMIUM_REGIONS  16
  34 #define MAX_PREMIUM_REGIONS     MAX_REGIONS
  35
  36
  37 /*
  38  * MAX_PARITIONS refers to the maximum number of logically defined
  39  * partitions the system can support.
  40  */
  41 #define MAX_PARTITIONS          MAX_REGIONS
  42
  43
  44 #define NASID_MASK_BYTES        ((MAX_NASIDS + 7) / 8)
  45 #define CNASID_MASK_BYTES       (NASID_MASK_BYTES / 2)
  46
  47
  48 /*
  49  * 1 FSB per SHUB, with up to 4 cpus per FSB.
  50  */
  51 #define NUM_SUBNODES    1
  52 #define SUBNODE_SHFT    0
  53 #define SUBNODE_MASK    (0x0 << SUBNODE_SHFT)
  54 #define LOCALCPU_SHFT   0
  55 #define LOCALCPU_MASK   (0x3 << LOCALCPU_SHFT)
  56 #define SUBNODE(slice)  (((slice) & SUBNODE_MASK) >> SUBNODE_SHFT)
  57 #define LOCALCPU(slice) (((slice) & LOCALCPU_MASK) >> LOCALCPU_SHFT)
  58 #define TO_SLICE(subn, local)   (((subn) << SUBNODE_SHFT) | \
  59                                  ((local) << LOCALCPU_SHFT))
  60
  61 #endif /* _ASM_IA64_SN_SN2_ARCH_H */