arch/mips/include/asm/sn/sn0/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 IP27 specific setup.
   7  *
   8  * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.
   9  * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
  10  */
  11 #ifndef _ASM_SN_SN0_ARCH_H
  12 #define _ASM_SN_SN0_ARCH_H
  13
  14
  15 #ifndef SN0XXL  /* 128 cpu SMP max */
  16 /*
  17  * This is the maximum number of nodes that can be part of a kernel.
  18  * Effectively, it's the maximum number of compact node ids (cnodeid_t).
  19  */
  20 #define MAX_COMPACT_NODES       64
  21
  22 /*
  23  * MAXCPUS refers to the maximum number of CPUs in a single kernel.
  24  * This is not necessarily the same as MAXNODES * CPUS_PER_NODE
  25  */
  26 #define MAXCPUS                 128
  27
  28 #else /* SN0XXL system */
  29
  30 #define MAX_COMPACT_NODES       128
  31 #define MAXCPUS                 256
  32
  33 #endif /* SN0XXL */
  34
  35 /*
  36  * This is the maximum number of NASIDS that can be present in a system.
  37  * (Highest NASID plus one.)
  38  */
  39 #define MAX_NASIDS              256
  40
  41 /*
  42  * MAX_REGIONS refers to the maximum number of hardware partitioned regions.
  43  */
  44 #define MAX_REGIONS             64
  45 #define MAX_NONPREMIUM_REGIONS  16
  46 #define MAX_PREMIUM_REGIONS     MAX_REGIONS
  47
  48 /*
  49  * MAX_PARITIONS refers to the maximum number of logically defined
  50  * partitions the system can support.
  51  */
  52 #define MAX_PARTITIONS          MAX_REGIONS
  53
  54 #define NASID_MASK_BYTES        ((MAX_NASIDS + 7) / 8)
  55
  56 /*
  57  * Slot constants for SN0
  58  */
  59 #ifdef CONFIG_SGI_SN_N_MODE
  60 #define MAX_MEM_SLOTS   16                      /* max slots per node */
  61 #else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */
  62 #define MAX_MEM_SLOTS   32                      /* max slots per node */
  63 #endif /* CONFIG_SGI_SN_M_MODE */
  64
  65 #define SLOT_SHIFT              (27)
  66 #define SLOT_MIN_MEM_SIZE       (32*1024*1024)
  67
  68 #define CPUS_PER_NODE           2       /* CPUs on a single hub */
  69 #define CPUS_PER_NODE_SHFT      1       /* Bits to shift in the node number */
  70 #define CPUS_PER_SUBNODE        2       /* CPUs on a single hub PI */
  71
  72 #endif /* _ASM_SN_SN0_ARCH_H */