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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:01 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:01 +0200
commit9a163ed8e0552fdcffe405d2ea7134819a81456e (patch)
treeb322fd2afbb812ba7ddfd22f3734aaab007c2aa5 /arch/x86/kernel/topology.c
parentf7627e2513987bb5d4e8cb13c4e0a478352141ac (diff)
i386: move kernel
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/topology.c')
-rw-r--r--arch/x86/kernel/topology.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
new file mode 100644
index 00000000000..45782356a61
--- /dev/null
+++ b/arch/x86/kernel/topology.c
@@ -0,0 +1,77 @@
+/*
+ * arch/i386/kernel/topology.c - Populate sysfs 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 <linux/mmzone.h>
+#include <asm/cpu.h>
+
+static struct i386_cpu cpu_devices[NR_CPUS];
+
+int arch_register_cpu(int num)
+{
+ /*
+ * 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.
+ *
+ * Also certain PCI quirks require not to enable hotplug control
+ * for all CPU's.
+ */
+ if (num && enable_cpu_hotplug)
+ cpu_devices[num].cpu.hotpluggable = 1;
+
+ return register_cpu(&cpu_devices[num].cpu, num);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+int enable_cpu_hotplug = 1;
+
+void arch_unregister_cpu(int num) {
+ return unregister_cpu(&cpu_devices[num].cpu);
+}
+EXPORT_SYMBOL(arch_register_cpu);
+EXPORT_SYMBOL(arch_unregister_cpu);
+#endif /*CONFIG_HOTPLUG_CPU*/
+
+static int __init topology_init(void)
+{
+ int i;
+
+#ifdef CONFIG_NUMA
+ for_each_online_node(i)
+ register_one_node(i);
+#endif /* CONFIG_NUMA */
+
+ for_each_present_cpu(i)
+ arch_register_cpu(i);
+ return 0;
+}
+
+subsys_initcall(topology_init);