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-rw-r--r--arch/ia64/kernel/topology.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
new file mode 100644
index 000000000000..f1aafd4c05f9
--- /dev/null
+++ b/arch/ia64/kernel/topology.c
@@ -0,0 +1,92 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * This file contains NUMA specific variables and functions which can
+ * be split away from DISCONTIGMEM and are used on NUMA machines with
+ * contiguous memory.
+ * 2002/08/07 Erich Focht <efocht@ess.nec.de>
+ * Populate cpu entries in sysfs for non-numa systems as well
+ * Intel Corporation - Ashok Raj
+ */
+
+#include <linux/config.h>
+#include <linux/cpu.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/node.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/nodemask.h>
+#include <asm/mmzone.h>
+#include <asm/numa.h>
+#include <asm/cpu.h>
+
+#ifdef CONFIG_NUMA
+static struct node *sysfs_nodes;
+#endif
+static struct ia64_cpu *sysfs_cpus;
+
+int arch_register_cpu(int num)
+{
+ struct node *parent = NULL;
+
+#ifdef CONFIG_NUMA
+ parent = &sysfs_nodes[cpu_to_node(num)];
+#endif /* CONFIG_NUMA */
+
+ return register_cpu(&sysfs_cpus[num].cpu, num, parent);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+
+void arch_unregister_cpu(int num)
+{
+ struct node *parent = NULL;
+
+#ifdef CONFIG_NUMA
+ int node = cpu_to_node(num);
+ parent = &sysfs_nodes[node];
+#endif /* CONFIG_NUMA */
+
+ return unregister_cpu(&sysfs_cpus[num].cpu, parent);
+}
+EXPORT_SYMBOL(arch_register_cpu);
+EXPORT_SYMBOL(arch_unregister_cpu);
+#endif /*CONFIG_HOTPLUG_CPU*/
+
+
+static int __init topology_init(void)
+{
+ int i, err = 0;
+
+#ifdef CONFIG_NUMA
+ sysfs_nodes = kmalloc(sizeof(struct node) * MAX_NUMNODES, GFP_KERNEL);
+ if (!sysfs_nodes) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memset(sysfs_nodes, 0, sizeof(struct node) * MAX_NUMNODES);
+
+ /* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? */
+ for_each_online_node(i)
+ if ((err = register_node(&sysfs_nodes[i], i, 0)))
+ goto out;
+#endif
+
+ sysfs_cpus = kmalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
+ if (!sysfs_cpus) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memset(sysfs_cpus, 0, sizeof(struct ia64_cpu) * NR_CPUS);
+
+ for_each_present_cpu(i)
+ if((err = arch_register_cpu(i)))
+ goto out;
+out:
+ return err;
+}
+
+__initcall(topology_init);