summaryrefslogtreecommitdiff
path: root/arch/tile/include/asm/topology.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/include/asm/topology.h')
-rw-r--r--arch/tile/include/asm/topology.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/tile/include/asm/topology.h b/arch/tile/include/asm/topology.h
new file mode 100644
index 000000000000..343172d422a9
--- /dev/null
+++ b/arch/tile/include/asm/topology.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010 Tilera Corporation. 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, version 2.
+ *
+ * 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.
+ */
+
+#ifndef _ASM_TILE_TOPOLOGY_H
+#define _ASM_TILE_TOPOLOGY_H
+
+#ifdef CONFIG_NUMA
+
+#include <linux/cpumask.h>
+
+/* Mappings between logical cpu number and node number. */
+extern struct cpumask node_2_cpu_mask[];
+extern char cpu_2_node[];
+
+/* Returns the number of the node containing CPU 'cpu'. */
+static inline int cpu_to_node(int cpu)
+{
+ return cpu_2_node[cpu];
+}
+
+/*
+ * Returns the number of the node containing Node 'node'.
+ * This architecture is flat, so it is a pretty simple function!
+ */
+#define parent_node(node) (node)
+
+/* Returns a bitmask of CPUs on Node 'node'. */
+static inline const struct cpumask *cpumask_of_node(int node)
+{
+ return &node_2_cpu_mask[node];
+}
+
+/* For now, use numa node -1 for global allocation. */
+#define pcibus_to_node(bus) ((void)(bus), -1)
+
+/* sched_domains SD_NODE_INIT for TILE architecture */
+#define SD_NODE_INIT (struct sched_domain) { \
+ .min_interval = 8, \
+ .max_interval = 32, \
+ .busy_factor = 32, \
+ .imbalance_pct = 125, \
+ .cache_nice_tries = 1, \
+ .busy_idx = 3, \
+ .idle_idx = 1, \
+ .newidle_idx = 2, \
+ .wake_idx = 1, \
+ .flags = SD_LOAD_BALANCE \
+ | SD_BALANCE_NEWIDLE \
+ | SD_BALANCE_EXEC \
+ | SD_BALANCE_FORK \
+ | SD_WAKE_AFFINE \
+ | SD_SERIALIZE, \
+ .last_balance = jiffies, \
+ .balance_interval = 1, \
+}
+
+/* By definition, we create nodes based on online memory. */
+#define node_has_online_mem(nid) 1
+
+#endif /* CONFIG_NUMA */
+
+#include <asm-generic/topology.h>
+
+#ifdef CONFIG_SMP
+#define topology_physical_package_id(cpu) ((void)(cpu), 0)
+#define topology_core_id(cpu) (cpu)
+#define topology_core_cpumask(cpu) ((void)(cpu), cpu_online_mask)
+#define topology_thread_cpumask(cpu) cpumask_of(cpu)
+
+/* indicates that pointers to the topology struct cpumask maps are valid */
+#define arch_provides_topology_pointers yes
+#endif
+
+#endif /* _ASM_TILE_TOPOLOGY_H */