include/asm-mips/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 #include <linux/config.h>
  15
  16 #ifndef SABLE
  17
  18 #ifndef SN0XXL  /* 128 cpu SMP max */
  19 /*
  20  * This is the maximum number of nodes that can be part of a kernel.
  21  * Effectively, it's the maximum number of compact node ids (cnodeid_t).
  22  */
  23 #define MAX_COMPACT_NODES       64
  24
  25 /*
  26  * MAXCPUS refers to the maximum number of CPUs in a single kernel.
  27  * This is not necessarily the same as MAXNODES * CPUS_PER_NODE
  28  */
  29 #define MAXCPUS                 128
  30
  31 #else /* SN0XXL system */
  32
  33 #define MAX_COMPACT_NODES       128
  34 #define MAXCPUS                 256
  35
  36 #endif /* SN0XXL */
  37
  38 /*
  39  * This is the maximum number of NASIDS that can be present in a system.
  40  * (Highest NASID plus one.)
  41  */
  42 #define MAX_NASIDS              256
  43
  44 /*
  45  * MAX_REGIONS refers to the maximum number of hardware partitioned regions.
  46  */
  47 #define MAX_REGIONS             64
  48 #define MAX_NONPREMIUM_REGIONS  16
  49 #define MAX_PREMIUM_REGIONS     MAX_REGIONS
  50
  51 /*
  52  * MAX_PARITIONS refers to the maximum number of logically defined
  53  * partitions the system can support.
  54  */
  55 #define MAX_PARTITIONS          MAX_REGIONS
  56
  57
  58 #else
  59
  60 #define MAX_COMPACT_NODES       4
  61 #define MAX_NASIDS              4
  62 #define MAXCPUS                 8
  63
  64 #endif
  65
  66 #define NASID_MASK_BYTES        ((MAX_NASIDS + 7) / 8)
  67
  68 /*
  69  * Slot constants for SN0
  70  */
  71 #ifdef CONFIG_SGI_SN0_N_MODE
  72 #define MAX_MEM_SLOTS   16                      /* max slots per node */
  73 #else /* !CONFIG_SGI_SN0_N_MODE, assume M_MODE */
  74 #define MAX_MEM_SLOTS   32                      /* max slots per node */
  75 #endif /* defined(N_MODE) */
  76
  77 #if SABLE_RTL
  78 #define SLOT_SHIFT              (28)
  79 #define SLOT_MIN_MEM_SIZE       (16*1024*1024)
  80 #else
  81 #define SLOT_SHIFT              (27)
  82 #define SLOT_MIN_MEM_SIZE       (32*1024*1024)
  83 #endif
  84
  85 #define CPUS_PER_NODE           2       /* CPUs on a single hub */
  86 #define CPUS_PER_NODE_SHFT      1       /* Bits to shift in the node number */
  87 #define CPUS_PER_SUBNODE        2       /* CPUs on a single hub PI */
  88
  89 #endif /* _ASM_SN_SN0_ARCH_H */