arch/ia64/include/asm/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, 2000-2005 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/irq.h>
  13 #include <asm/sn/arch.h>
  14 #include <asm/sn/intr.h>
  15 #include <asm/sn/bte.h>
  16
  17 /*
  18  * NUMA Node-Specific Data structures are defined in this file.
  19  * In particular, this is the location of the node PDA.
  20  * A pointer to the right node PDA is saved in each CPU PDA.
  21  */
  22
  23 /*
  24  * Node-specific data structure.
  25  *
  26  * One of these structures is allocated on each node of a NUMA system.
  27  *
  28  * This structure provides a convenient way of keeping together
  29  * all per-node data structures.
  30  */
  31 struct phys_cpuid {
  32         short                   nasid;
  33         char                    subnode;
  34         char                    slice;
  35 };
  36
  37 struct nodepda_s {
  38         void            *pdinfo;        /* Platform-dependent per-node info */
  39
  40         /*
  41          * The BTEs on this node are shared by the local cpus
  42          */
  43         struct bteinfo_s        bte_if[MAX_BTES_PER_NODE];      /* Virtual Interface */
  44         struct timer_list       bte_recovery_timer;
  45         spinlock_t              bte_recovery_lock;
  46
  47         /*
  48          * Array of pointers to the nodepdas for each node.
  49          */
  50         struct nodepda_s        *pernode_pdaindr[MAX_COMPACT_NODES];
  51
  52         /*
  53          * Array of physical cpu identifiers. Indexed by cpuid.
  54          */
  55         struct phys_cpuid       phys_cpuid[NR_CPUS];
  56         spinlock_t              ptc_lock ____cacheline_aligned_in_smp;
  57 };
  58
  59 typedef struct nodepda_s nodepda_t;
  60
  61 /*
  62  * Access Functions for node PDA.
  63  * Since there is one nodepda for each node, we need a convenient mechanism
  64  * to access these nodepdas without cluttering code with #ifdefs.
  65  * The next set of definitions provides this.
  66  * Routines are expected to use
  67  *
  68  *      sn_nodepda   - to access node PDA for the node on which code is running
  69  *      NODEPDA(cnodeid)   - to access node PDA for cnodeid
  70  */
  71
  72 DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
  73 #define sn_nodepda              __this_cpu_read(__sn_nodepda)
  74 #define NODEPDA(cnodeid)        (sn_nodepda->pernode_pdaindr[cnodeid])
  75
  76 /*
  77  * Check if given a compact node id the corresponding node has all the
  78  * cpus disabled.
  79  */
  80 #define is_headless_node(cnodeid)       (nr_cpus_node(cnodeid) == 0)
  81
  82 #endif /* _ASM_IA64_SN_NODEPDA_H */