sh: Support for multiple nodes.
This adds basic support for multiple nodes on SH machines.
This is primarily useful for boards with many different
memory blocks that are otherwise unused (SH7722/SH7785 URAM
and so forth).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/mmzone.h b/include/asm-sh/mmzone.h
new file mode 100644
index 0000000..7969f38
--- /dev/null
+++ b/include/asm-sh/mmzone.h
@@ -0,0 +1,46 @@
+#ifndef __ASM_SH_MMZONE_H
+#define __ASM_SH_MMZONE_H
+
+#ifdef __KERNEL__
+
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid) (node_data[nid])
+
+#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
+ NODE_DATA(nid)->node_spanned_pages)
+
+static inline int pfn_to_nid(unsigned long pfn)
+{
+ int nid;
+
+ for (nid = 0; nid < MAX_NUMNODES; nid++)
+ if (pfn >= node_start_pfn(nid) && pfn <= node_end_pfn(nid))
+ break;
+
+ return nid;
+}
+
+static inline struct pglist_data *pfn_to_pgdat(unsigned long pfn)
+{
+ return NODE_DATA(pfn_to_nid(pfn));
+}
+
+/* arch/sh/mm/numa.c */
+void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end);
+#else
+static inline void
+setup_bootmem_node(int nid, unsigned long start, unsigned long end)
+{
+}
+#endif /* CONFIG_NEED_MULTIPLE_NODES */
+
+/* Platform specific mem init */
+void __init plat_mem_setup(void);
+
+/* arch/sh/kernel/setup.c */
+void __init setup_bootmem_allocator(unsigned long start_pfn);
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_MMZONE_H */
diff --git a/include/asm-sh/topology.h b/include/asm-sh/topology.h
index cff001c..f402a3b 100644
--- a/include/asm-sh/topology.h
+++ b/include/asm-sh/topology.h
@@ -1,6 +1,36 @@
#ifndef _ASM_SH_TOPOLOGY_H
#define _ASM_SH_TOPOLOGY_H
+#ifdef CONFIG_NUMA
+
+/* sched_domains SD_NODE_INIT for sh machines */
+#define SD_NODE_INIT (struct sched_domain) { \
+ .span = CPU_MASK_NONE, \
+ .parent = NULL, \
+ .child = NULL, \
+ .groups = NULL, \
+ .min_interval = 8, \
+ .max_interval = 32, \
+ .busy_factor = 32, \
+ .imbalance_pct = 125, \
+ .cache_nice_tries = 2, \
+ .busy_idx = 3, \
+ .idle_idx = 2, \
+ .newidle_idx = 0, \
+ .wake_idx = 1, \
+ .forkexec_idx = 1, \
+ .flags = SD_LOAD_BALANCE \
+ | SD_BALANCE_FORK \
+ | SD_BALANCE_EXEC \
+ | SD_SERIALIZE \
+ | SD_WAKE_BALANCE, \
+ .last_balance = jiffies, \
+ .balance_interval = 1, \
+ .nr_balance_failed = 0, \
+}
+
+#endif
+
#include <asm-generic/topology.h>
#endif /* _ASM_SH_TOPOLOGY_H */
