1 files changed, 68 insertions, 0 deletions
diff --git a/include/asm-x86_64/topology.h b/include/asm-x86_64/topology.h
new file mode 100644
index 000000000000..67f24e0ea819
--- /dev/null
+++ b/include/asm-x86_64/topology.h
@@ -0,0 +1,68 @@
+#ifndef _ASM_X86_64_TOPOLOGY_H
+#define _ASM_X86_64_TOPOLOGY_H
+
+#include <linux/config.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+
+#include <asm/mpspec.h>
+#include <asm/bitops.h>
+
+/* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
+
+extern cpumask_t cpu_online_map;
+
+extern unsigned char cpu_to_node[];
+extern cpumask_t     node_to_cpumask[];
+extern cpumask_t pci_bus_to_cpumask[];
+
+#ifdef CONFIG_ACPI_NUMA
+extern int __node_distance(int, int);
+#define node_distance(a,b) __node_distance(a,b)
+/* #else fallback version */
+#endif
+
+#define cpu_to_node(cpu)		(cpu_to_node[cpu])
+#define parent_node(node)		(node)
+#define node_to_first_cpu(node) 	(__ffs(node_to_cpumask[node]))
+#define node_to_cpumask(node)		(node_to_cpumask[node])
+
+static inline cpumask_t __pcibus_to_cpumask(int bus)
+{
+	cpumask_t busmask = pci_bus_to_cpumask[bus];
+	cpumask_t online = cpu_online_map;
+	cpumask_t res;
+	cpus_and(res, busmask, online);
+	return res;
+}
+#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
+
+#ifdef CONFIG_NUMA
+/* sched_domains SD_NODE_INIT for x86_64 machines */
+#define SD_NODE_INIT (struct sched_domain) {		\
+	.span			= CPU_MASK_NONE,	\
+	.parent			= NULL,			\
+	.groups			= NULL,			\
+	.min_interval		= 8,			\
+	.max_interval		= 32,			\
+	.busy_factor		= 32,			\
+	.imbalance_pct		= 125,			\
+	.cache_hot_time		= (10*1000000),		\
+	.cache_nice_tries	= 1,			\
+	.per_cpu_gain		= 100,			\
+	.flags			= SD_LOAD_BALANCE	\
+				| SD_BALANCE_NEWIDLE	\
+				| SD_BALANCE_EXEC	\
+				| SD_WAKE_IDLE		\
+				| SD_WAKE_BALANCE,	\
+	.last_balance		= jiffies,		\
+	.balance_interval	= 1,			\
+	.nr_balance_failed	= 0,			\
+}
+#endif
+
+#endif
+
+#include <asm-generic/topology.h>
+
+#endif