arch/alpha/include/asm/topology.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_ALPHA_TOPOLOGY_H
   3 #define _ASM_ALPHA_TOPOLOGY_H
   4
   5 #include <linux/smp.h>
   6 #include <linux/threads.h>
   7 #include <asm/machvec.h>
   8
   9 #ifdef CONFIG_NUMA
  10 static inline int cpu_to_node(int cpu)
  11 {
  12         int node;
  13
  14         if (!alpha_mv.cpuid_to_nid)
  15                 return 0;
  16
  17         node = alpha_mv.cpuid_to_nid(cpu);
  18
  19 #ifdef DEBUG_NUMA
  20         BUG_ON(node < 0);
  21 #endif
  22
  23         return node;
  24 }
  25
  26 extern struct cpumask node_to_cpumask_map[];
  27 /* FIXME: This is dumb, recalculating every time.  But simple. */
  28 static const struct cpumask *cpumask_of_node(int node)
  29 {
  30         int cpu;
  31
  32         if (node == -1)
  33                 return cpu_all_mask;
  34
  35         cpumask_clear(&node_to_cpumask_map[node]);
  36
  37         for_each_online_cpu(cpu) {
  38                 if (cpu_to_node(cpu) == node)
  39                         cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
  40         }
  41
  42         return &node_to_cpumask_map[node];
  43 }
  44
  45 #define cpumask_of_pcibus(bus)  (cpu_online_mask)
  46
  47 #endif /* !CONFIG_NUMA */
  48 # include <asm-generic/topology.h>
  49
  50 #endif /* _ASM_ALPHA_TOPOLOGY_H */