1 files changed, 114 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
new file mode 100644
index 00000000..884b001b
--- /dev/null
+++ b/arch/powerpc/include/asm/topology.h
@@ -0,0 +1,114 @@
+#ifndef _ASM_POWERPC_TOPOLOGY_H
+#define _ASM_POWERPC_TOPOLOGY_H
+#ifdef __KERNEL__
+
+
+struct device;
+struct device_node;
+
+#ifdef CONFIG_NUMA
+
+/*
+ * Before going off node we want the VM to try and reclaim from the local
+ * node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
+ * With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
+ * 20, we never reclaim and go off node straight away.
+ *
+ * To fix this we choose a smaller value of RECLAIM_DISTANCE.
+ */
+#define RECLAIM_DISTANCE 10
+
+#include <asm/mmzone.h>
+
+static inline int cpu_to_node(int cpu)
+{
+	int nid;
+
+	nid = numa_cpu_lookup_table[cpu];
+
+	/*
+	 * During early boot, the numa-cpu lookup table might not have been
+	 * setup for all CPUs yet. In such cases, default to node 0.
+	 */
+	return (nid < 0) ? 0 : nid;
+}
+
+#define parent_node(node)	(node)
+
+#define cpumask_of_node(node) ((node) == -1 ?				\
+			       cpu_all_mask :				\
+			       node_to_cpumask_map[node])
+
+struct pci_bus;
+#ifdef CONFIG_PCI
+extern int pcibus_to_node(struct pci_bus *bus);
+#else
+static inline int pcibus_to_node(struct pci_bus *bus)
+{
+	return -1;
+}
+#endif
+
+#define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
+				 cpu_all_mask :				\
+				 cpumask_of_node(pcibus_to_node(bus)))
+
+extern int __node_distance(int, int);
+#define node_distance(a, b) __node_distance(a, b)
+
+extern void __init dump_numa_cpu_topology(void);
+
+extern int sysfs_add_device_to_node(struct device *dev, int nid);
+extern void sysfs_remove_device_from_node(struct device *dev, int nid);
+
+#else
+
+static inline void dump_numa_cpu_topology(void) {}
+
+static inline int sysfs_add_device_to_node(struct device *dev, int nid)
+{
+	return 0;
+}
+
+static inline void sysfs_remove_device_from_node(struct device *dev,
+						int nid)
+{
+}
+#endif /* CONFIG_NUMA */
+
+#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
+extern int start_topology_update(void);
+extern int stop_topology_update(void);
+extern int prrn_is_enabled(void);
+#else
+static inline int start_topology_update(void)
+{
+	return 0;
+}
+static inline int stop_topology_update(void)
+{
+	return 0;
+}
+static inline int prrn_is_enabled(void)
+{
+	return 0;
+}
+#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
+
+#include <asm-generic/topology.h>
+
+#ifdef CONFIG_SMP
+#include <asm/cputable.h>
+#define smt_capable()		(cpu_has_feature(CPU_FTR_SMT))
+
+#ifdef CONFIG_PPC64
+#include <asm/smp.h>
+
+#define topology_thread_cpumask(cpu)	(per_cpu(cpu_sibling_map, cpu))
+#define topology_core_cpumask(cpu)	(per_cpu(cpu_core_map, cpu))
+#define topology_core_id(cpu)		(cpu_to_core_id(cpu))
+#endif
+#endif
+
+#endif /* __KERNEL__ */
+#endif	/* _ASM_POWERPC_TOPOLOGY_H */