include/asm-mips/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 Silcon Graphics, Inc.
   9  * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
  10  */
  11 #ifndef _ASM_SN_ARCH_H
  12 #define _ASM_SN_ARCH_H
  13
  14 #include <linux/types.h>
  15 #include <asm/sn/types.h>
  16 #ifdef CONFIG_SGI_IP27
  17 #include <asm/sn/sn0/arch.h>
  18 #endif
  19
  20 typedef u64     hubreg_t;
  21
  22 #define cputonasid(cpu)         (sn_cpu_info[(cpu)].p_nasid)
  23 #define cputoslice(cpu)         (sn_cpu_info[(cpu)].p_slice)
  24 #define makespnum(_nasid, _slice)                                       \
  25                 (((_nasid) << CPUS_PER_NODE_SHFT) | (_slice))
  26
  27 #define INVALID_NASID           (nasid_t)-1
  28 #define INVALID_CNODEID         (cnodeid_t)-1
  29 #define INVALID_PNODEID         (pnodeid_t)-1
  30 #define INVALID_MODULE          (moduleid_t)-1
  31 #define INVALID_PARTID          (partid_t)-1
  32
  33 extern nasid_t get_nasid(void);
  34 extern cnodeid_t get_cpu_cnode(cpuid_t);
  35 extern int get_cpu_slice(cpuid_t);
  36
  37 /*
  38  * NO ONE should access these arrays directly.  The only reason we refer to
  39  * them here is to avoid the procedure call that would be required in the
  40  * macros below.  (Really want private data members here :-)
  41  */
  42 extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
  43 extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
  44
  45 /*
  46  * These macros are used by various parts of the kernel to convert
  47  * between the three different kinds of node numbering.   At least some
  48  * of them may change to procedure calls in the future, but the macros
  49  * will continue to work.  Don't use the arrays above directly.
  50  */
  51
  52 #define NASID_TO_REGION(nnode)          \
  53     ((nnode) >> \
  54      (is_fine_dirmode() ? NASID_TO_FINEREG_SHFT : NASID_TO_COARSEREG_SHFT))
  55
  56 extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];
  57 extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
  58 extern cnodeid_t cpuid_to_compact_node[MAXCPUS];
  59
  60 #define NASID_TO_COMPACT_NODEID(nnode)  (nasid_to_compact_node[nnode])
  61 #define COMPACT_TO_NASID_NODEID(cnode)  (compact_to_nasid_node[cnode])
  62 #define CPUID_TO_COMPACT_NODEID(cpu)    (cpuid_to_compact_node[(cpu)])
  63
  64 #endif /* _ASM_SN_ARCH_H */