arch/tile: core support for Tilera 32-bit chips.

This change is the core kernel support for TILEPro and TILE64 chips.
No driver support (except the console driver) is included yet.

This includes the relevant Linux headers in asm/; the low-level
low-level "Tile architecture" headers in arch/, which are
shared with the hypervisor, etc., and are build-system agnostic;
and the relevant hypervisor headers in hv/.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Paul Mundt <lethal@linux-sh.org>

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 */