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