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