This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / i386 / kernel / topology.c

diff --git a/arch/i386/kernel/topology.c b/arch/i386/kernel/topology.c
new file mode 100644 (file)
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+++ b/arch/i386/kernel/topology.c
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+/*
+ * arch/i386/kernel/topology.c - Populate driverfs with topology information
+ *
+ * Written by: Matthew Dobson, IBM Corporation
+ * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL
+ *
+ * Copyright (C) 2002, IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <colpatch@us.ibm.com>
+ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/nodemask.h>
+#include <asm/cpu.h>
+
+static struct i386_cpu cpu_devices[NR_CPUS];
+
+int arch_register_cpu(int num){
+       struct node *parent = NULL;
+
+#ifdef CONFIG_NUMA
+       int node = cpu_to_node(num);
+       if (node_online(node))
+               parent = &node_devices[node].node;
+#endif /* CONFIG_NUMA */
+
+       /*
+        * CPU0 cannot be offlined due to several
+        * restrictions and assumptions in kernel. This basically
+        * doesnt add a control file, one cannot attempt to offline
+        * BSP.
+        */
+       if (!num)
+               cpu_devices[num].cpu.no_control = 1;
+
+       return register_cpu(&cpu_devices[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);
+       if (node_online(node))
+               parent = &node_devices[node].node;
+#endif /* CONFIG_NUMA */
+
+       return unregister_cpu(&cpu_devices[num].cpu, parent);
+}
+EXPORT_SYMBOL(arch_register_cpu);
+EXPORT_SYMBOL(arch_unregister_cpu);
+#endif /*CONFIG_HOTPLUG_CPU*/
+
+
+
+#ifdef CONFIG_NUMA
+#include <linux/mmzone.h>
+#include <asm/node.h>
+
+struct i386_node node_devices[MAX_NUMNODES];
+
+static int __init topology_init(void)
+{
+       int i;
+
+       for_each_online_node(i)
+               arch_register_node(i);
+
+       for_each_present_cpu(i)
+               arch_register_cpu(i);
+       return 0;
+}
+
+#else /* !CONFIG_NUMA */
+
+static int __init topology_init(void)
+{
+       int i;
+
+       for_each_present_cpu(i)
+               arch_register_cpu(i);
+       return 0;
+}
+
+#endif /* CONFIG_NUMA */
+
+subsys_initcall(topology_init);