1 files changed, 74 insertions, 0 deletions
diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c
new file mode 100644
index 000000000..2d2a7509b
--- /dev/null
+++ b/arch/sh/kernel/topology.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/topology.c
+ *
+ *  Copyright (C) 2007  Paul Mundt
+ */
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+#include <linux/topology.h>
+#include <linux/node.h>
+#include <linux/nodemask.h>
+#include <linux/export.h>
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+cpumask_t cpu_core_map[NR_CPUS];
+EXPORT_SYMBOL(cpu_core_map);
+
+static cpumask_t cpu_coregroup_map(int cpu)
+{
+	/*
+	 * Presently all SH-X3 SMP cores are multi-cores, so just keep it
+	 * simple until we have a method for determining topology..
+	 */
+	return *cpu_possible_mask;
+}
+
+const struct cpumask *cpu_coregroup_mask(int cpu)
+{
+	return &cpu_core_map[cpu];
+}
+
+int arch_update_cpu_topology(void)
+{
+	unsigned int cpu;
+
+	for_each_possible_cpu(cpu)
+		cpu_core_map[cpu] = cpu_coregroup_map(cpu);
+
+	return 0;
+}
+
+static int __init topology_init(void)
+{
+	int i, ret;
+
+	for_each_present_cpu(i) {
+		struct cpu *c = &per_cpu(cpu_devices, i);
+
+		c->hotpluggable = 1;
+
+		ret = register_cpu(c, i);
+		if (unlikely(ret))
+			printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
+			       __func__, i, ret);
+	}
+
+#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
+	/*
+	 * In the UP case, make sure the CPU association is still
+	 * registered under each node. Without this, sysfs fails
+	 * to make the connection between nodes other than node0
+	 * and cpu0.
+	 */
+	for_each_online_node(i)
+		if (i != numa_node_id())
+			register_cpu_under_node(raw_smp_processor_id(), i);
+#endif
+
+	return 0;
+}
+subsys_initcall(topology_init);