Hexagon: Add SMP support

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Linas Vepstas <linas@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/hexagon/kernel/topology.c b/arch/hexagon/kernel/topology.c
new file mode 100644
index 000000000000..ba4475184432
--- /dev/null
+++ b/arch/hexagon/kernel/topology.c
@@ -0,0 +1,52 @@
+/*
+ * CPU topology for Hexagon
+ *
+ * Copyright (c) 2010-2011, Code Aurora Forum. 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 version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.  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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/node.h>
+#include <linux/nodemask.h>
+#include <linux/percpu.h>
+
+/*  Swiped from MIPS.  */
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+static int __init topology_init(void)
+{
+        int i, ret;
+
+        for_each_present_cpu(i) {
+
+                /*
+                 * register_cpu takes a per_cpu pointer and
+                 * just points it at another per_cpu struct...
+                 */
+
+                ret = register_cpu(&per_cpu(cpu_devices, i), i);
+                if (ret)
+                        printk(KERN_WARNING "topology_init: register_cpu %d "
+                               "failed (%d)\n", i, ret);
+        }
+
+        return 0;
+}
+
+subsys_initcall(topology_init);