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-rw-r--r--include/asm-x86_64/topology.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/include/asm-x86_64/topology.h b/include/asm-x86_64/topology.h
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+++ b/include/asm-x86_64/topology.h
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+#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