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 /*
  16  * MAXCPUS refers to the maximum number of CPUs in a single kernel.
  17  * This is not necessarily the same as MAXNODES * CPUS_PER_NODE
  18  */
  19 #define MAXCPUS                 (MAX_NUMNODES * CPUS_PER_NODE)
  20
  21 /*
  22  * This is the maximum number of NASIDS that can be present in a system.
  23  * (Highest NASID plus one.)
  24  */
  25 #define MAX_NASIDS              256
  26
  27 /*
  28  * MAX_REGIONS refers to the maximum number of hardware partitioned regions.
  29  */
  30 #define MAX_REGIONS             64
  31 #define MAX_NONPREMIUM_REGIONS  16
  32 #define MAX_PREMIUM_REGIONS     MAX_REGIONS
  33
  34 /*
  35  * MAX_PARITIONS refers to the maximum number of logically defined
  36  * partitions the system can support.
  37  */
  38 #define MAX_PARTITIONS          MAX_REGIONS
  39
  40 #define NASID_MASK_BYTES        ((MAX_NASIDS + 7) / 8)
  41
  42 /*
  43  * Slot constants for SN0
  44  */
  45 #ifdef CONFIG_SGI_SN_N_MODE
  46 #define MAX_MEM_SLOTS   16                      /* max slots per node */
  47 #else /* !CONFIG_SGI_SN_N_MODE, assume CONFIG_SGI_SN_M_MODE */
  48 #define MAX_MEM_SLOTS   32                      /* max slots per node */
  49 #endif /* CONFIG_SGI_SN_M_MODE */
  50
  51 #define SLOT_SHIFT              (27)
  52 #define SLOT_MIN_MEM_SIZE       (32*1024*1024)
  53
  54 #define CPUS_PER_NODE           2       /* CPUs on a single hub */
  55
  56 #endif /* _ASM_SN_SN0_ARCH_H */