include/asm-ia64/sn/nodepda.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, 2000-2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8 #ifndef _ASM_IA64_SN_NODEPDA_H
   9 #define _ASM_IA64_SN_NODEPDA_H
  10
  11
  12 #include <asm/semaphore.h>
  13 #include <asm/irq.h>
  14 #include <asm/sn/arch.h>
  15 #include <asm/sn/intr.h>
  16 #include <asm/sn/pda.h>
  17 #include <asm/sn/bte.h>
  18
  19 /*
  20  * NUMA Node-Specific Data structures are defined in this file.
  21  * In particular, this is the location of the node PDA.
  22  * A pointer to the right node PDA is saved in each CPU PDA.
  23  */
  24
  25 /*
  26  * Node-specific data structure.
  27  *
  28  * One of these structures is allocated on each node of a NUMA system.
  29  *
  30  * This structure provides a convenient way of keeping together
  31  * all per-node data structures.
  32  */
  33 struct phys_cpuid {
  34         short                   nasid;
  35         char                    subnode;
  36         char                    slice;
  37 };
  38
  39 struct nodepda_s {
  40         void            *pdinfo;        /* Platform-dependent per-node info */
  41         spinlock_t              bist_lock;
  42
  43         /*
  44          * The BTEs on this node are shared by the local cpus
  45          */
  46         struct bteinfo_s        bte_if[BTES_PER_NODE];  /* Virtual Interface */
  47         struct timer_list       bte_recovery_timer;
  48         spinlock_t              bte_recovery_lock;
  49
  50         /*
  51          * Array of pointers to the nodepdas for each node.
  52          */
  53         struct nodepda_s        *pernode_pdaindr[MAX_COMPACT_NODES];
  54
  55         /*
  56          * Array of physical cpu identifiers. Indexed by cpuid.
  57          */
  58         struct phys_cpuid       phys_cpuid[NR_CPUS];
  59 };
  60
  61 typedef struct nodepda_s nodepda_t;
  62
  63 /*
  64  * Access Functions for node PDA.
  65  * Since there is one nodepda for each node, we need a convenient mechanism
  66  * to access these nodepdas without cluttering code with #ifdefs.
  67  * The next set of definitions provides this.
  68  * Routines are expected to use
  69  *
  70  *      nodepda                 -> to access node PDA for the node on which code is running
  71  *      subnodepda              -> to access subnode PDA for the subnode on which code is running
  72  *
  73  *      NODEPDA(cnode)          -> to access node PDA for cnodeid
  74  *      SUBNODEPDA(cnode,sn)    -> to access subnode PDA for cnodeid/subnode
  75  */
  76
  77 #define nodepda         pda->p_nodepda          /* Ptr to this node's PDA */
  78 #define NODEPDA(cnode)          (nodepda->pernode_pdaindr[cnode])
  79
  80 /*
  81  * Check if given a compact node id the corresponding node has all the
  82  * cpus disabled.
  83  */
  84 #define is_headless_node(cnode)         (nr_cpus_node(cnode) == 0)
  85
  86 #endif /* _ASM_IA64_SN_NODEPDA_H */